The analysis data of 200mw laser pointer

Considering the above characteristics and the actual system design to meet the small size, low power consumption, high-repetition-rate, speed, distance, etc., in this experiment, we choose the pulse laser ranging method as a whole system ranging way. Information systems through the typical photoelectron - laser ranging system design and implementation of information systems to understand the composition of common optoelectronics, optoelectronic information systems to master the general typical design, the use of available hardware modules to build indoor simulation of laser ranging system, the preparation of single-chip program Ranging from the calculation and display, analog to achieve indoor laser ranging. The centralized disposition of    green laser pointer will be done next month.
Pulsed laser ranging system theory and principles of microwave pulse radar range is similar to the measured point in the distance the target launch a bunch of short, intense laser pulse, light pulse emission to target a small portion of the laser ranging point of reflection to be optical receiver functions. Set the target distance R, the laser pulse to travel through time t, the transmission of light in the air speed of c, the distance formula is as follows: R = ct / 2. Actual use of pulsed laser range finder is crystal oscillator and clock pulse technology up time interval t of measurement. Crystal oscillator clock is used to generate electrical pulses of fixed frequency oscillation (T = 1 / f), pulse counter is the role of crystal oscillator to count the number of electrical pulses. The workshop will form a report according to the analysis data of       200mw laser pointer .
If the distance between the light from the target machine and the number of pulses within a time t is N, the distance can be measured with R ==. Relative ranging accuracy. Figure: pulsed laser ranging system consists of three parts: the laser transmitter, laser receiver part and the signal processing section. First by firing a laser pulse semiconductor lasers, the laser pulse through the optical system alignment after firing fired at targets (in this experiment the laser through a fiber-optic transmission), while out in the main wave of sampling through a small part of the main wave as a reference pulse sent into the receiving system, through the photoelectric detector is converted to electrical pulses, and then amplified by the amplifier open gate, then the counter starts counting. The batch production of    green laser will improve the manufacture of   green laser pointer     .
Over time, fired back by the target echo pulse signal (in this experiment is the signal after transmission through the fiber) brought together by receiving optical system after hitting the detector, and amplified through the photoelectric conversion into electrical signals enter the gate, so that gate closed, the counter stops counting. Thus, from open to close the N pulses the counter, this fiber can be measured by the length of R = Nc/2f. As can be seen from the previous two tables, pulsed laser ranging system as the application, its performance parameters varied. For tanks, artillery and other low-end laser range finder remote military test range pulsed laser ranging system far ranging accuracy is not high, eye-safe wavelength gradually into the direction; equipment to play on the pulsed laser ranging system and Small laser ranging range accuracy than ordinary military radar ranging system higher. The visual inspection of   green laser pointer is the most basic inspection of   green laser pointer     .
After considering the selected laser pulse parameters: emission by the optical system alignment system, right-angle prism and optical fiber coupler components. As the beam output aperture there is a certain size, and have some of the beam divergence angle, so that before coupling into the fiber coupler, with the beam propagation distance increases, the spot size will be larger, so the need for collimation. After the beam through the rectangular prism through the lens into the single-mode fiber coupling, beam divergence angle DA, a fiber core diameter and the coupling lens focal length f relationship: DA = a / f. Therefore, only the beam-beam divergence angle to meet the above formula can be coupled into the fiber. The purchase manager of    laser pointer is about to go to Shanghai to purchase materials of   green laser pointer     .