green laser pointer has vivid line and excellent hand feel

C shielding cabinet performance indicators (test method according to GGBB1-1999 standards) 1, B-level shielding enclosures: 150KHz-1GHz ≥ 60dB 2, C-level shielded cabinet: 14KHz ≥ 70dB, 150KHz ≥ 95dB, 200KHz-50MHz ≥ 100dB, 50MHz -1GHz ≥ 100dB, ④ shielded cabinet basic configuration: 1GHz-10GHz ≥ 95dB shielding shell: cold-rolled steel plate welded into the fully enclosed cabinet, after galvanizing and spray and other anti-corrosion treatment. PSD: High quality materials have been carefully shielded reed production and processing, cold-rolled steel plate welded into the composition of the PSD doors. 220V/50HZ all the way and equipped with power supply filter. The green laser pointer has vivid line and excellent hand feel.Power filter with wide suppression band and high insertion loss; standard line inside the enclosure row. Standard honeycomb ventilation waveguide windows, waveguide windows installed at the top of micro-axial flow fan, single exhaust volume 1.4m3/min. The necessary optical waveguide 4. Waveguide for the φ14 * 100 optical waveguide; server stand: adjustable up and down the location of the server after installation of bent; (rack cabinets consistent with the general bent).
Electrostatic shielding to prevent external field (including electric, magnetic, electromagnetic fields) into an area in need of protection, known as shielding. Shield divided into electrostatic shielding, static magnetic shielding, electromagnetic shielding are three different branches of which three The fundamental purpose of shielding species is based on different physical principles, the use of shielding shell field generated by the induction effect to resist the impact of the external field, so as to "protected areas" set up a barrier, inhibiting the outside interference. With the green laser pointer you could control the demonstrating speed with confidence.Electrostatic shielding [1]: In order to avoid external electric field on the impact of equipment or electrical equipment in order to avoid the effects of electric field on the outside, the outer conductor with a cavity field cover, so the internal is not affected, nor the electrical impact on the external device, which is called the electrostatic shielding. Ungrounded conductor shielded cavity for the outer shield, ground conductor shielded cavity is fully shielded. Electric field outside the cavity in a conductor electrostatic equilibrium, the total field strength of its internal zero. Therefore, the external electric field can not be any impact on its internal space. If the cavity has charged conductor, and in the static equilibrium, its inner surface will produce the same amount and opposite induced charge. The red laser of green laser pointer could easily attract people’s attention.If the case is not grounded within the outer surface of the charged body will produce the same amount and with the same number of induced charge, the electric field induced charge at this time will affect the outside world, when the electric field outside the cavity can shield conductor, but can not live inside the body shield the impact of the outside world, so called outer shield. If the casing is grounded, even if there is internal live parts, then the inner surface induced charge and the charge of the charged body and the zero algebra, the outer surface of the induced charge through the ground into the earth. Outside of the shell can not affect the internal impact of live body on the outside also will be eliminated, so this screen is called the fully shielded. In order to prevent external signal interference, electrostatic shielding is widely used in scientific and technical work. Only with one glance people could know how much power of the battery left in green laser pointer.Such as electronic equipment out of metal enclosures, communications cable wrapped in lead sheet, etc., are used to prevent interference with the external electric field shielding measures.

green laser pointer emits bright red laser

And all related materials, selection of fire retardant products. 2, the ceiling portion of the interior renovation project room ceiling should be fireproof, waterproof, sound absorption, corrosion resistance, wet and dry change without deformation, can not afford to dust, no dust, easy to clean and other functions and to be beautiful. Screw fitting approach using the form ceiling, ceiling spray porous materials using aluminum ceiling, color must be consistent with the original room interior ceilings, concrete parameters are as follows: Specification: 600 × 600mm, the thickness δ ≥ 0.8mm, as far as possible tone soft, no glare, fire, moisture-proof, easy to clean, sound-absorbing. This wireless green laser pointer has obvious button on the body.Ceiling should have a certain carrying capacity, should be able to withstand the weight of all installed equipment. 3, the wall to clean up after the installation of the engine room wall light steel keel, metal frame filled with fireproof rock wool insulation, gypsum board on metal frame grassroots, grass-roots anti-static high-strength plate for the color plates, accompanied by lighting effect, a room decorated with the noble and generous. 4, ground works on the ground with anti-static raised floor, the floor overhead height 300mm, in order to facilitate precision under the air conditioning. Transformation of the region before installing the floor, the ground to clean up the original, while the need for epoxy polyurethane paint brush on the ground, to avoid the operation room in the course of the next generation of dust, affect the normal operation of computer systems. The green laser pointer emits bright red laser.Air-conditioning of the area next to the laying of rubber insulation cotton, thicknesses not less than 20mm, in order to ensure reliable, required to achieve joints, seams connecting dense, floor stand at the double protection. The selected products must meet the following technical indicators No. 1234678910 thickness specifications focus on uniform load value load value of flatness tolerance electrical properties of fire indicators technical indicators stand carrying capacity of 600 × 600MM 35 ± 0.3MM 5672KG / M2 454KG ≤ 0.755MM ≥ 1 * 105 ~ 1 * 108Ω (HPL) oxygen index ≥ 32% B1 level 0 ~ 0.25MM ≥ 2273KG Note:The green laser pointer helps you to write and draw freely with confidence. The specific price offer on-site measurement of room size required Note: the offer to be on-site measurement of specific room size before making the budget before the budget can be made two electromagnetic shielding enclosures ① features: the main shielding enclosures for the shielding design. So I am using the inclusive approach to address the question of protection of electromagnetic information. The internal structure of a standard rack cabinet form the main structure of the cabinet can guarantee no deformation. Outer shielding by high-performance design principles and material selection. Front of the cabinet using the B (or C) PSD to do special cabinet doors. PSD excellent selection, door reed use of U.S. imports of high-quality beryllium copper shielding reeds. Cold-rolled steel plate welded using shielded shell sake closed box, and after galvanizing and spray and other anti-corrosion treatment. All keystrokes on green laser pointer are reasonably arranged and users can control it by simply touching them.Cabinet surface using spray technology to ensure the cabinet appearance, and generous. ② main uses electromagnetic shielding cabinet mainly used in: 1, to prevent the computers, network servers and communication electronics equipment in the operation of the disclosure of confidential information; 2, to prevent the operation of the device by the external electromagnetic interference, to ensure their normal work.

green laser pointer improves the working efficiency

Volume is essential. 4, the laser welding process ⑶ laser welding laser welding machine is high-intensity laser beam radiation to the metal surface, the laser welding is the high-intensity laser beam radiation to the metal surface by laser interaction with metal, weld the metal to melt.
Spot, and can accurately locate, can be applied to high-volume automated production of micro-welding of small parts of the group. 3, the laser welding equipment o often referred to as laser welding, laser welding machine, according to their work often can be divided into mold burning laser welding laser welding, laser welding, manual welding machine), automatic laser welding laser spot welding, laser welding optical fiber transmission, etc.), automatic laser welding (manual welding machine), automatic laser welding, laser spot welding, laser welding, etc.The green laser pointer could help users to solve tough operational problems in physical space. ⑹ optical fiber transmission inaccessible parts can be welded, implementation of long-range non-contact welding, a very inaccessible parts can be welded, the implementation of long-range non-contact welding, a large flexibility. Of flexibility. In particular, in recent years, the YAG laser processing technology uses fiber-optic transmission technology, the laser welding technology to obtain a wider range of promotion and application. However, laser welding, there are also some limitations: However, laser welding, there are also some limitations: ⑴ weldment assembly requires high precision, and require the location of the beam on the workpiece can not have the required high precision weldment assembly, significantly the offset. A significant shift. This is because after the laser focus spot size is small, narrow weld, without filler metal materials.So the green laser pointer improves the working efficiency. If the workpiece assembly precision beam positioning accuracy or fail to meet requirements, it is likely to cause weld defects. ⑵ lasers and their associated high cost of the system, a one-time investment is large. Lasers and their associated high cost of the system, a one-time investment is large. 10 laser welding equipment mainly by lasers, optical systems, welding machines and control system components. Mainly by the laser welding equipment, laser, optical systems, welding machines and control system. Laser gas lasers and YAG lasers ⑴ solid-state laser two. YAG solid-state lasers used in laser welding two kinds of main CO2 gas laser and YAG solid-state laser two. Comparison between the advantages and disadvantages as shown in Table 1. The most important properties of the laser output power and beam quality is. green laser pointer totally set users free from restriction in teaching demonstration.YAG laser is the most important performance laser output power and beam quality. Guide light focusing optical system focusing system consists of circularly polarized beam expander lens, mirror or fiber optic, circular polarizers, optical focusing system consists of circular polarizers, beam expander, mirrors or fiber, focusing lens and other components, to achieve change the beam polarization state, direction, etc. transmit and focus the beam to achieve the change in beam polarization state, the direction of the function. The function. These optical components for laser welding conditions are extremely important impact on quality. These optical components for laser welding conditions are extremely important impact on quality. Role in high-power laser, optical components, in the role of high-power laser, optical components, especially the deterioration of the transmittance of the lens performance will decline; will have a thermal lens effect (the transmittance decreased; will produce thermal lensing ( reduced thermal expansion of the lens focal length); surface contamination will increase transmission loss.); surface contamination will increase transmission loss. With green laser pointer, you control the computer at any corner of the classroom.Surface contamination will increase the transmission loss so the quality of optical components, so the quality of optical components, maintenance and condition monitoring work is essential for ensuring the quality of welding.

green laser pointer could be widely used in educational institutions

The light radiation energy in a very short period of time the light energy into heat energy, radiation energy in a very short period of time the light energy into heat, melt the material to form a particular weld pool in order to achieve the purpose. Material melted to form a particular weld pool in order to achieve the purpose. 1, Overview: Overview: Laser welding in 1964, when the plasma reflection issue, penetration is very small, development is very slow. Until 1972, reflective problem solving, the penetration depth of up to 13m or more, mainly used for welding thin materials and low-speed welding, is a hot m conduction.This green laser pointer could be widely used in educational institutions. The laser radiation heating surface, the surface heat transfer driven by internal heat diffusion, by controlling the laser pulse width, energy, peak power and repetition rate and other parameters, so that the workpiece melt to form a specific pool. Because of its unique advantages, have been successfully applied to micro, small parts sensors, sensor, spark plugs and other parts of the precision of laser welding welding. C 2 and high-power high-power YAG O lasers appeared, opened up a new field of laser welding. Effects obtained with the theoretical basis of the holes deep penetration welding, mechanical, automobile, steel and other industries to obtain an increasingly wide range of applications. This green laser pointer could be widely used in chambers.9 household appliances, electronic components, laser welding appliances, mold repair parts, mold parts repair, electronic components, such as laser welding car parts, auto parts, jewelry, etc. 2 laser welding, laser welding and electron beam welding characteristics compared to laser welding does not produce radiation, does not produce X and electron beam welding, laser welding does not produce X-rays, no vacuum chamber, 2W less than the price is cheaper. More suitable for the production application. Laser 2W within relatively cheap. More suitable for the production application. Within a relatively cheap welding actually made 20 years ago, electron beam welding position, welding position 20 years ago actually made 20 years ago, electron beam welding position as a high-energy beam welding technology development mainstream. Welding technology development mainstream. This green laser pointer could be widely used in exhibition institutions.Compared with other welding, laser welding of the main advantages are: Compared with other welding, laser welding of the main advantages are: aspect ratio of up to 5: 1, 10:1. ⑴ high power density, greater than 10 5W/cm2, aspect ratios of up to 5: 1, high power density of up to 10:1, ⑵ at room temperature or under special conditions, welding, welding equipment installation simple. At room temperature or under special conditions, welding, welding equipment installation simple. For example, the laser through the electromagnetic field, the beam does not shift; laser in a vacuum, air and a gas welding environment can, and can be glass or transparent material of the beam welding. ⑶ refractory materials can be welded, such as titanium, quartz, etc., and for welding dissimilar materials. Refractory materials can be welded, such as titanium, quartz, etc., and for welding dissimilar materials. This green laser pointer could be widely used in training institutions.To good effect. ⑷ laser beam is easy to achieve beam splitting by time and space, capable of multi-beam laser beam is easy to achieve both time and space by the beam splitter, processing and multi-bit processing, processing and multi-bit processing, providing for more sophisticated welding conditions . ⑸ deformation is small, can be micro-welding. By focusing the laser beam of light is given to a small deformation is small, can be micro-welding.

The green ray green laser pointer is the focus of the discussion

Cavity wavelength scale in the order of the laser. It has low thresholds and high conversion efficiency, high-speed modulation characteristics. Currently, its main structure, the form of vertical-cavity surface-emitting lasers and micro-disk lasers. Vertical-cavity surface-emitting lasers in general is highly reflective multilayer dielectric film as the flat mirrors, the laser emitted perpendicular to the surface mirrors; microdisk lasers is to use the curved interface of total internal reflection limits the formation of cavities, as in whispering gallery mode the main resonant mode. In 1988, Japan's Tokyo Institute of Iga (Iga), who successfully developed a vertical-cavity surface-emitting lasers; 1992 U.S. AT & T's McCaw (McCall), who successfully developed the liquid nitrogen temperature optically pumped InGaAs / InGaAsP microdisk lasers. The accurate parameter of green laser pointer is the main information which should be provided to the customer.
Micro-cavity laser because of its small size, light-emitting material for cavity quantum confinement produced, which appeared in a series of cavity quantum electrodynamics (large QED) effects. Of cavity quantum electrodynamics theory provides a stage show. This laser than conventional semiconductor lasers has obvious advantages in optical integration, optical interconnects, optical neural networks, and optical communications have a wide range of applications. To work with the excimer gas laser material of a class of devices. Used relativistic electron beam (energy greater than 200 keV) or horizontal discharge to achieve rapid pulse excitation. When the excited state excimer unstable molecules bond breaking and dissociation into ground state atoms, excited-state energy of laser radiation in the form of release. The accurate parameter of green laser pointer has been checked and inspected for many times.
The first was born in 1970 excimer laser, which uses strong electron beam excitation of liquid xenon, xenon excimer lasing get the role, the laser wavelength of 1720 angstroms. Subsequently, the gas xenon excimer molecules and other rare gases, rare gas-oxide excimer (oxidation krypton, xenon oxide, oxidation argon, etc.), metal vapor - noble gas excimer (xenon sodium, etc.); rare gas compounds quasi-single-tooth molecules (fluorinated xenon, argon fluoride, krypton fluoride, xenon chloride, bromide, xenon, xenon iodide, chloride, krypton, etc.), metal gear excimer compounds (mercuric chloride, bromide, mercury, etc.) and quasi-metal molecules (sodium excimer, etc.) gradually born. Excimer laser material with a lower state of exclusion, it can be effective in taking the time, so no low-state absorption and energy loss, inversion is very easy to gain a large, high conversion efficiency, repetition rate, the radiation wave length. The customer speaks highly of the accurate parameter of green laser pointer.
Mainly in the ultraviolet and vacuum ultraviolet (extended to the visible minority) area oscillation, wide tuning range. It isotope separation, UV chemistry, laser spectroscopy, fast photography, high-resolution holography, laser weapons, material structure, optical communications, remote sensing, integrated optics, nonlinear optics, agriculture, medicine, biology, and pump tunable dye lasers, etc. have been more widely used, and is expected to develop into the laser for nuclear fusion devices. In the medical field using laser types are more commonly used in ophthalmic treatment are ruby (rudy) laser, argon ions (Ar +) laser, krypton (Kr +), dye (dye) laser, neodymium-doped yttrium aluminum garnet ( Nd: YAG) laser and argon fluoride (ArF) excimer laser and other solid, gas and liquid lasers, with continuous, pulsed and Q-switched mode, the bottom of the eye treatment refractive pigment membrane and other parts of the number of ten kinds of related eye diseases. The customer thinks that the parameter of green laser pointer can be more accurate.
Excimer laser used in ophthalmology, is argon (Argon) and fluorine gas (Fluoride) of working gas produced by the laser. The so-called excimer laser, is excited dimer (inert gas and halogen two elements) generated by the laser, the wavelength range of 157 ~ 353nm, respective UV laser band. Now for the clinical argon fluoride (ArF) produced a mixture of extreme-ultraviolet wavelength of 193nm cold laser. The wavelength of 193nm ArF excimer laser for refractive surgery is the mechanism of photochemical effects. Excimer laser single photon energy is about 6.4eV, and corneal tissue in the peptide bond and the combination of carbon molecules bond energy of only 3.6eV. When the high-energy photon radiation to the cornea, directly break molecular bonds within the organization, leading to fragmentation and to achieve ablation of corneal tissue cut the organization's purpose, and because the excimer laser pulse is short (10 ~ 20nm), but also photochemical effect removal. The company thinks that the parameter of green laser pointer is accurate enough.

Red raygreen laser pointer has the full-blown technology

For this principle is the main drawback of tunable laser tuning time is slower, it normally takes a few seconds settling time tuning. Temperature-based control technology used in the DFB structure, its principle is to adjust the temperature of the laser cavity, which can make different emission wavelengths. Technology based on the principle of regulation is the wavelength tunable laser control InGaAsP DFB lasers rely on the work in the -5 - 50 ℃ to achieve change. Module built-in FP etalon and optical power detection, continuous light output of the laser can be locked in the provisions of the 50GHz ITU grid spacing on. Module has two separate TEC, one to control the laser wavelength, and the other to ensure that the wavelength locking module and power detection probe temperature work. The accuracy of green laser pointer should be ensured at first.
Module has built-in SOA to amplify the output optical power. The disadvantage of this control technology is the tuning width of a single module is not wide, generally only a few nm, and tuning a long time, it normally takes a few seconds settling time tuning. Tunable lasers are now basically control the use of current technology, temperature control technology or mechanical control technology, some providers may use one or both of these technologies. Of course, as technology evolves, there could be other new tunable laser control technology. Laser working substance to silicate crystal matrix of solid-state lasers. Mix of people in the silicate crystals in a variety of different silicate activation of ion lasers available, of which chromium magnesium olive stone mix lasers of the most important and most promising. Mix olive stone magnesium chromium (Cr: Mg2SiO4) laser was born in 1988, with its wide tuning range and by the people's attention. The accuracy of green laser pointer has drawn a lot of customers.
Theoretically Mg2SiO4 laser tuning range of 680 ∽ 1400nm, the experiment has been realized that the harmonic range of 1130 ∽ 1367nm, by improving the crystal quality, it is possible to achieve a step into 840 ∽ 1400nm, the laser tuning range. Cr: Mg2SiO4 activation of ion tetravalent chromium ions, with a large stimulated emission cross section and high quantum efficiency (77%, the efficiency of solid-state laser tuning is the highest). Cr: Mg2SiO4 laser multi-Nd: YAG laser and its second harmonic pumped, mode-locked and Q adjustable, continuous, pulsed operation of a variety of ways, has achieved 60fs mode-locked laser output. Cr: Mg2SiO4 laser output 1.276μm wavelength laser, the wavelength of zero is considered to be material color length, width, pattern, beam diameter, divergence angle, M2 values. Laser waveform measurement usually photodetector to receive light signals into electrical signals and enter the oscilloscope display and measurement. Rough measurement of laser wavelengths available monochromator, accurate measurement of the wavelength meter required. The exact parameter of green laser pointer should be supplied.
Rough measurement of laser linewidth can also be used monochromator, accurate measurement of available spectrometers, standard equipment and so on. Laser mode and the beam diameter measurement method used mobile holes (small holes along the beam cross-section of one-dimensional scanning, simultaneous recording of optical power through the hole) rough measurement, precision measuring device or CCD. M2 value measurement is to measure various physical quantities, respectively, then the definition of M2 value is calculated. Current measurement has been developed for the computer for automatic data processing: two-dimensional CCD device after receiving the laser to produce an electrical signal input for computer processing, can be given directly to the laser wave, ellipticity, divergence angle, Jian waist diameter, M value, the cross section of light graphic three-dimensional intensity distribution of the laser wave with standard waveforms (Gaussian or Lorentz type) of the difference and other parameters. The exact parameter of green laser pointer has been listed in the table.

Here will introduce the function of electronic pointer of green laser pointer

Long-wavelength semiconductor lasers currently work for the main laser material is indium gallium aluminum arsenide and indium gallium arsenic phosphide materials, can send 980 nm to 1550 nm wavelength laser. Double-heterostructure semiconductor lasers in the two sides of the active region heterostructure, activation injected electrons and holes, due to both sides of the high barrier limit, depth surge, narrowing the active region thickness, d ≈ 0.5? m. Meanwhile, both sides of the active region refractive index difference is enormous, "waveguide effect" is very significant, so that optical waveguide transmission loss greatly reduced, so the double-heterostructure laser threshold current density lower, can be reduced to 102 ~ 103 A / cm 2. Room temperature, availability of a few milliwatts to several hundred milliwatts of continuous power output. green laser pointer is also used in exhibition fairs.
Overview of laser processing technology is the laser one of the great inventions of this century, technology has great potential. For a monochrome laser, coherence and parallel the three major characteristics, especially for material processing. Laser applications in laser processing is the most promising areas, has developed 20 kinds of foreign laser processing technology. Space and time controlled laser controlled well, the object of processing the material, shape, size and processing environment of freedom are large, especially for automated processing. Laser processing systems and computer numerical control technology may constitute a highly efficient automated processing equipment, has become the key enterprises in-time production techniques for high-quality, efficient and low-cost processing has opened up broad prospects. green laser pointer can make the demonstrators feel easy.
Laser processing technique is the use of laser beam interaction with the material properties of the materials (including metal and nonmetal) for cutting, welding, surface treatment, drilling and processing of a micro-processing technology. Laser processing technique is related to the optical, mechanical, electrical, materials, and testing and many other subjects of an integrated technology, its research scope can be divided into: 1. Laser processing system. Including lasers, optical systems, machine tools, control system and detection system. 2. Laser processing technology. Including cutting, welding, surface treatment, drilling, marking, scribing, trimming, and other processes. 1, the principle of laser processing of laser processing is laser beam to the workpiece surface, high-energy laser to cut, melt, and change the surface properties of materials. As the laser processing is non-contact processing. green laser pointer is a useful tool for travelling.
Tool and the workpiece surface is not observed directly generate resistance to wear, so fast laser processing, processing of objects and small heat affected area will not produce noise. As the laser beam energy and beam speed can be adjusted so the laser processing can be applied to different levels and scope. 2, the characteristics of the laser with the laser processing of valuable characteristics determine the presence of laser field in the processing advantages: ① Because it is non-contact processing, and high-energy laser beam energy and its speed can be adjusted, so you can achieve a variety of processing purposes. ② It can be a variety of metals, non-metal processing, in particular, can be processed high hardness, high brittleness, and high melting point materials. ③ Laser processing no "tool" wear and tear, no "cutting force" acting on the workpiece. ④ laser processing, laser beam energy density, processing speed, and is the local processing of non-laser irradiation has no effect or minimal impact on the site. Therefore, the heat affected zone, thermal deformation of the workpiece is small, a small amount of follow-up process. This kind of green laser pointer is the smallest green light pen.
It can be a transparent medium of sealed containers for a variety of workpiece machining. ⑥ use of laser processing, high efficiency, reliable quality, good economic returns its general scope of the study can be divided into: 1. Laser processing systems, including lasers, optical systems, machine tools, control system and detection system. 2. Processing technology, including laser cutting, welding, surface treatment, drilling, marking, scribing, trimming, and other processes. The field of laser processing applications, CO2 laser cutting and welding to the most widely used, respectively, accounted for 70% and 20%, surface treatment is less than 10%. It is the product presentation of green laser pointer.

The trainer can smoothly step into the next training stage with help of green laser pointer

We use the dicing of the sample into the cleavage. 11, the optical-cavity surface-film deposition: Evaporation rate of the index of refraction, scattering, stress, hardness, etc. have significant impact on the substrate temperature affect material adhesion coefficient and film thickness, and structure. Evaporation rate and substrate temperature process conditions determine the film characteristics, such as refractive index, stress, hardness. We have the die cavity surface before and after electron beam evaporation, respectively, the reflection rate of 5% and 95% of the dielectric film; 12, the carrier production: a lot of heat generated when the laser work, heat must be timely in order to maintain their normal work, the carrier is The main part of laser cooling. Therefore, in order to achieve a good cooling purposes, the carrier material must be selected. It is the applicable occasions of green laser pointer.
On the one hand, the carrier material should be a good conductor of heat, pollution and does not die with the physical properties of the laser to match the coefficient of thermal expansion is mainly the same or close to; other hand, the carrier material should have the ease of processing, and laser burn die welding easy, and high reliability. Heat to smooth the surface of the carrier, the carrier cooling process qualified solder layer can effectively reduce the thickness of the thermal resistance of the device to reduce the junction temperature decreases, increase the device's optical power. We use the carrier material is tungsten copper, tungsten copper thermal expansion coefficient and die approximation, the carrier and the die can be reduced due to thermal expansion coefficient between the different causes of degradation; 13, sintering: laser junction temperature is an important factor affecting the life, The higher the junction temperature, the shorter life expectancy. Junction temperature affected by many factors. green laser pointer can benefit the customer in every way.
Through experiments, we used a gold-tin alloy as the sintering of high-power semiconductor laser chip solder plating process used in the gold-plated tungsten-tin solder on a copper carrier, and strictly control the coating thickness. In gas, the heat carrier on the gold-tin, to melt. Chip stuck or shrink the chip after the carrier will be uneven heating during use, thereby seriously affecting life. Gas effectively reduce the thermal resistance due to the increase caused by oxidation, reduce the contact resistance to achieve a good weld. 14, test: X-ray double-crystal epitaxial layer diffraction curve can evaluate the crystal quality of epitaxial material, between the flatness of the epitaxial layer to calculate the Al composition in the epitaxial material, calculate the waveguide layer and the cladding layer was Al composition whether to meet the design requirements. green laser pointer are the best assistants for you to deliver a speech.
Calculated from the IV curve IdV / dI-I curve by IdV / dI-I curves obtained threshold current of 12 Yanbian University undergraduate thesis, series resistance, section characteristic parameters m, sink height h, the vertical axis intercept b, early the beginning of the peak number. Sink height h and the device series resistance of the material structure and, h small, poor reliability. Vertical axis intercept b larger, indicating that the leakage current increase. More than the initial peak number of devices susceptible to degradation. 13 conclusion of Yanbian University undergraduate thesis paper first introduces the laser principle, characteristics and other relevant theoretical knowledge, followed by laser leads to the basic structure and working principle of this paper, the long-wavelength semiconductor lasers are discussed. On this basis, proposed a long-wavelength laser diode design, including material growth and design, die design, reliability design, and finally to the production process research. green laser pointer are the pilotages of the expansive outer space.
The principle of laser light by stimulated emission of light, so that the atoms in the excited states of light by external incentives and transition to a low energy level, also issued a photon with exactly the same external photon excitation, in order to achieve light amplification. Purports to stimulated emission of light as a major process, need to make light-emitting material in the excited state energy level than the low-energy particles on the particle level, ie the distribution of inversion, but also to make such a medium by the stimulated emission a dominant role. Development of electronic technology to provide an incentive energy, precision processing technology to create a resonant cavity, materials science research to provide a variety of laser working substance, in such conditions, the birth of another variety of lasers, including the long-wavelength semiconductor lasers. green laser pointer could serve as the best pointers.

green laser pointer is of the mini size

Ground state for the laser level. As the ground state as to preclude state or weakly bound state is unstable, it is their potential energy curves along the C internuclear distance R to the fast increase of the direction, and finally dissociate into individual atoms, ground state molecules will disappear. Ground state molecules very short-lived, as the order of 10-13s. Excited state for the bound state, its 10-8s level lifetime is orders of magnitude, than the ground state stable, and therefore at the nuclear distance R0 is easy to form B, C distribution among the population inversion. Excimer from the excited state to ground state transition from the bound state can be said to a free state (weakly bound state or rejection state) transition. We will try our best to provide the more competitive price for green laser pointer .
This transition, due to lower level approximation is empty, so there is full and the termination of low-level inversion problem. Excimer transition that is not "self-termination"-type transition. As long as there is - given the number of excimer exists, reversal there, it is easy to accumulate a considerable number of particles, and may get larger and larger inversion gain. As the ground state lifetime is very short, even ultrashort pulse case, the ground state can be considered to be empty, so giant pulse excimer system is particularly beneficial for the produce. As the laser level is the ground state, basically no radiation loss. Therefore, a high quantum efficiency, it is possible to achieve high efficiency of excimer lasers the main reason. The customer has noticed the advantage of green laser pointer price of this green laser pointer company.
As the ion laser level rapidly dissociate, thus lengthening the pulse width and high repetition rate work without difficulty. As the excimer fluorescence spectra of a continuous band, it can be made frequency tunable devices. On the laser level lifetime is very short, in order to achieve population inversion, requiring the pump pulse rise time is short. Therefore, work on short wave ultraviolet excimer laser system to achieve an effective pump, requires not only a large pump power, and require a fast rise time. In order to meet the requirements of the pump source, people take a lot of pumping methods, commonly used in the following two: The electron gun produces high-energy, fast rise time of the electron beam pulse, the electron beam fired at the excimer region of the active medium for excitation. Electron-beam-pumped can be divided into three types: horizontal pump, the electron beam to the laser optical axis perpendicular to the direction. The worker is showing the assembly process of green laser pointer .
In this way, simple structure, small size, the drawback is the use of low energy electron beam. Pumped, the electron beam direction parallel to the laser optical axis. Pumped energy efficiency improvement, but the need to increase the use of electron beam bunching oriented large magnetic field. Coaxial electron beam pump, composed of the electron gun cathode and anode made of two different diameters of the cylinder, the cathode outer tube inner tube evenly across the anode and the anode electronic book launch foil (foil made of aluminum foil or barium) to central axis of convergence. Anode cylinder filled with active medium, the optical axis and the anode tube, cathode tube coaxial. This approach can effectively use the electron beam energy. Electron beam generated by the pump has the advantage of fast rise time of the pump pulse, single pulse energy, a large area can be pumped. The worker is carefully studying the working instruction of green laser pointer .
Drawback is to require a large electron beam source, complex, high cost, manufacturing difficulties. Especially as the anode foil, it absorbs heat energy and the electron beam is often breakdown, resulting in a vacuum chamber leak, so the negative high repetition rate work. Fast way to use more so-called discharge-pumped Bruce Mulai (Blumlein) circuit. It has small size, simple structure, high-repetition-rate work can be, etc., are widely used. In order to improve the stability of the discharge, the electron beam can be used to control the discharge pump system. Stimulate the activation of particles depends mainly on the fast discharge, electron beam controlled discharge only, so that the discharge uniform and reliable. This circuit of the electron beam with low power requirements, can reduce the volume. But compared with other methods of rapid discharge of such pump approach is that the structure is complicated and costly. In order to achieve greater uniformity of the discharge volume, but also with pre-ionization technique. The worker should work in three shifts to accomplish all the orders of green laser pointer .

The diameter of red ray green laser pointer is 1cm

As the short cavity semiconductor lasers, laser direction is poor, especially in the end of the vertical plane, a large divergence angle, up to 2030. In the end of the horizontal plane, the divergence angle of about several times. Figure (5-30) gives the spatial distribution of the semiconductor laser beam diagram. Figure (5-31) is a GaAs laser emission spectra. One figure (a) is below the threshold of the fluorescence spectrum, spectral width is generally a few hundred angstroms, Figure (b) is the injection current to or greater than the threshold value of laser spectroscopy, tens of angstroms wide spectrum. Although the semiconductor laser spectral width is much narrower than the fluorescence, but lower than the gas and solid-state lasers to be much wider. With the emergence of new devices, spectral width has been improved, such as distributed feedback laser linewidth, and only about 1 angstrom. More processing machine of green laser pointer  can ensure the high output of green laser pointer .
Where, V is the voltage drop on the pn junction, RS is the laser series resistance (including resistivity and contact resistance). As the laser operating current greater resistance power-hungry, so the power efficiency at room temperature only a few percent. By different p-type semiconductor material and n-type semiconductor pn junction formed called heterojunction. To overcome the shortcomings of homojunction semiconductor lasers, to improve power and efficiency, reduce the threshold current, developed a heterojunction semiconductor lasers. Single-heterojunction device structure shown in Figure (5-32) (b) below, by a single heterojunction p-GaAs and p-GaAlAs formed. Electrons from the n region into the p-GaAs, heterojunction because of the high barrier limit, the active region thickness d2. Only the complete and signed material inquisition sheet of green laser pointer can get the material the workshop needs from the warehouse of green laser pointer .
Also, because p-GaAlAs refractive index is small, "waveguide effect" is significant, the light transmission limits in the active zone. These two factors make single-heterostructure laser threshold current density is reduced 1 ? 2 orders of magnitude, about 8000A/cm2. Double-heterostructure semiconductor laser refers to the active area on both sides, there are two heterojunction, as shown in Figure (5-32) (c) below. Double-heterostructure laser active region injected electrons and holes, due to both sides of the high barrier limit, depth surge, the thickness of the active region narrows, d0.5. Meanwhile, both sides of the active region refractive index difference is enormous, "waveguide effect" is very significant, so that light transmission loss greatly reduced. Therefore, the double-heterostructure laser threshold current density lower, can be reduced to 102 ? 103A/cm2. Room temperature, availability of a few milliwatts to several hundred milliwatts of continuous power output. The drawing of green laser pointer should be maintained in the good status.
The above described solid, gas, semiconductor, and dye lasers, which are some of the older and more mature and developed the laser. Furthermore, there are excimer lasers, free electron lasers, chemical lasers, fiber lasers and some newly developed and there is a better prospect of laser devices. This section briefly describes these lasers. Under normal atom, the excited state can be temporarily combined into unstable molecules, called excimer, referred to as the excimer. Excimer laser is the excimer gas working substance. Since 1970, the first since the advent of excimer lasers, it successfully developed a variety of excimer lasers, and isotope separation, photochemistry, pumped dye lasers has made a contribution. Some parameters in the drawing of green laser pointer should be revised.
Laser weapons development in the area, it is also one of very promising laser. Excimer laser treatment of myopia has also achieved good economic and social benefits. So far, excimer lasers are more and more incentives also continue to improve, increasing power and efficiency. Joule energy pulse output has reached one hundred orders of magnitude, the pulse peak power of kilowatts or more, repetition rate of 200 times / sec, the beam divergence angle 0.15mrad. Excimer laser is characterized as follows: level structure has distinctive features. Figure (5-33) shows, A indicates a higher excited state, B the laser upper level, C, said the ground state. Most items of green laser pointer agreement has been determined.

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In gas lasers, the most common is helium-neon laser. The world's first helium-neon laser is the second shortly after the first ruby laser in 1960, Bell Laboratories in the United States by the Iranian physicist Jia Wan made. As the helium-neon laser emits monochromatic beam direction and good, can work, so this laser is the most used lasers today mainly used in the holographic precision measurement, collimator positioning. Gas lasers is another typical argon ion laser. It can send bright blue-green shade, continuous work, the output power of 100 watts. The representative of the customer will perform the manufacture supervision of Laser Pointer this week.
Such lasers in the visible region is the highest output power of a laser. Because of its blue-green laser is emitted, so the most used on the eye, blue-green because the human eye's response is very sensitive to the retinal heme, lutein can absorb green light. Thus, argon ion laser eye surgery, can rapidly form a local heating, the protein into a gel state of the retina, which is the ideal light source for welding the retina. Argon ion laser emits blue-green laser can deep sea floor, without being absorbed by seawater, which can be used underwater survey operations. The new sales strategy of Green Laser Pointer increased the revenue of the company.
Also known as liquid laser dye laser, because the activation of these lasers is that some organic dye material dissolved in ethanol, methanol or water and other liquids in the form of the solution. In order to stimulate them to emit a laser, commonly used for high-speed flash laser source, or by other laser emits very short pulses of light. For liquid laser emits laser spectroscopy, laser chemistry and other scientific research, is of great significance. Chemical laser is a chemical reaction to generate the laser. Fluorine atoms and hydrogen atoms, such as chemical reactions, can generate hydrogen fluoride molecules in the excited state. Thus, when the two gases mix quickly to be able to produce the laser, so no other energy can be obtained directly from the chemical reaction is very strong light. The inspection includes the self-inspection of Green Laser Pointer and the mutual inspection of Green Laser Pointer .
These lasers are more suitable for field work, or for military purposes, it is fear of death ray weapon is a result of application of chemical lasers. In today's lasers, and some are made with the semiconductor. They are small, long life, motivation is simple (usually electrical stimulation), low threshold current, easy-to-scale production, the early output of the laser semiconductor laser coherence, direction and other poor performance, the more types of output laser frequency less, mostly in the infrared region, but now with further research and expansion of semiconductor materials and structures, semiconductor lasers, such as the family appeared edge-emitting lasers, quantum well lasers, vertical cavity surface emitting lasers, and so the output performance of the new laser members, the type of the output laser frequency in the visible region are also widely distributed. The customer needs more discount for the product of Green Laser Pointer.
In particular, vertical cavity surface emitting lasers, in addition to single-longitudinal-mode output, low threshold current start-up and other outstanding features, but also on a large scale in the production process and the array of technology, so that semiconductor lasers can output high power laser and further reduce the production cost of semiconductor lasers, which will help the popularity of laser applications. Currently, the semiconductor laser is the most widely used laser family of one, such as optical communication (such as fiber optic communications), optical storage and read (ie, CD-ROM and CD-ROM), optical switches, optical logic devices, and so on. The customer wanna check the top selling list of Green Laser Pointer .

The user is inspecting the parameter of Green Laser Pointer listed in the table

Since then, many laboratories the world have been involved in the development of a fierce competition to see who can successfully build and operate the world's first laser. In 1960, the American physicist Theodore Maiman in Miami, Florida ? research laboratory, barely won the worldwide development of competition. He used to stimulate a high-strength flash tube inside the ruby crystal of chromium atoms, resulting in a considerable concentration of the thin red beam of light, when it is fired at a certain point, it can reach higher temperatures than the sun. The proper maintenance of Green Laser Pointer can be mastered easily.
"Maiman design" caused the scientific community's shock and suspicion, because scientists have been looking and looking forward to a helium-neon laser. Although Maiman introduced the first practical laser scientists in the field, but in court, on in the end who invented the technology debate, once aroused much controversy. One contender is the "Laser" ("stimulated emission type optical frequency amplifiers," the acronym) ? Gordon Gould, inventor of the term. He studied at Columbia University Ph.D. 1957, made the word. At the same time, the inventor of the maser Townes and Xiao Luo also developed the concept of the laser. Final decision by the court, Townes paperwork for research in Gould as early as 9 months to become the winner. The parameter of Laser Pointer should be carefully determined.
But Maiman's invention of the laser power has not been shaken. December 1960, Iranian-born American scientist Jia Wan rate finally succeeded in making people and running the world's first gas laser - He-Ne laser. In 1962, there are three groups of researchers almost simultaneously invented the semiconductor laser. In 1966, scientists have developed into a range of wavelengths can be continuously adjusted in the organic dye laser. In addition, the output energy, high power, and do not rely on the grid of chemical lasers have come out. As with all the salient features of the laser, which was soon used in industry, agriculture, precision measurement and detection, communications and information processing, medical, military and other areas, and in many areas caused a revolutionary breakthrough. The drawing of Green Laser Pointer will be revised after being studied carefully if necessary.
For example, people use laser focus and high energy, a variety of materials can be processed, a needle can be drilled in 200 holes; laser on the body as a biological cause irritation, mutation, burning, evaporation and other effects means, in medicine, agriculture, practical application and achieved good results; in the communications field, a column with a laser optical signal transmission cable can carry the equivalent of 20 000 the amount of information carried by copper wire telephone; laser in the military With the exception for communications, night vision, warning, distance, etc., the variety of laser weapons and laser-guided weapons has also been put into practical use. In the future, laser technology with the human further research and development. Some clause of Green Laser Pointer agreement should be simplified.  Will further improve laser performance, the cost will be further reduced, but it will continue to expand the scope of application is, and will play an increasingly significant role. Laser pointer is the use of laser as an indicator of small, low-power laser, a general civilian goods, also known as laser pointer, Pointer pen. Is a versatile product: teaching, research units as teaching, research papers, conferences and so forth with the use of video equipment as instructed; military units with large-screen command system for instructions; tourism units for guided tours; construction and renovation supervision units for construction, renovation acceptance of instructions and so on. Some cases can also be fixed as a directional tool; also as a gift. Several items should be added the  Green Laser Pointer agreement.