The directivity of 200mw laser pointer is not convenient for using

The 2.4G technology of green laser pointer  is at the world’s level. Laser product hazard level classification is to describe the laser system to the extent of human damage to the definition of indicators. Classification from Class I laser (no damage) to Class IV lasers such as the 2000-watt carbon dioxide laser (you can cut thick steel plate). Manufacturers must be Class II, Class III and Class IV laser products are labeled with the risk level classification of the words with laser warning label. The beams are likely to view any blocked, and exposed to the laser in the laser system is interlocked. (Large laser printers such as the DEC LPS-40 is 10 mW (IIIb type) helium-neon laser-driven, although the actual laser is Class IIIb, but the printer is interlocked so as to avoid any exposure to the laser beam exposure, Therefore, the device does not produce any biological hazards, which also applies to CD players and small laser printers, they are first-class device). This kind of  green laser pointer  has the directivity.
Output power of 1 mW. Will not burn the skin, does not cause a fire. As the eye reflex can prevent some eye damage, so these are not considered dangerous laser optical devices. (For example, when the eye encounters a bright light, it will automatically blink, or turn the head to avoid the strong light. This is called reflex action or reflex time in this time of such laser products will not cause eye injury. However, a person will not be willing to look a long time staring at it). In this type of laser equipment should be placed on a yellow warning label. Output power of 1 mW to 5 mW. Will not burn the skin. Under certain conditions, these lasers can cause blindness and other eye damage. These lasers should include: laser light, indicating that the laser is working; should use the power key switch to prevent unauthorized use; hazard label should be affixed with a label and output xx. Output power of 5 mW to 500 mW. When the power is relatively high, these laser products can burn skin. The using of  green laser pointer  will be limited by the directivity.
These lasers have clearly defined as harmful to the eyes, especially when the power is relatively high, will cause eye damage. These lasers must have: the key switch to prevent unauthorized use; laser emission indicator laser is working; turn on the power after 3-5 seconds delay allows the operator to leave the beam path, with emergency stop switch, at any time off the laser beam; the laser must be affixed with a red label and the risk of xx (aperature) label. (250mw laser irradiation a red paper, less than 2 seconds to ignite). Greater than 500 mW output power. These lasers will be able to cause eye damage. Burn skin and ignite clothing just like the laser can ignite other materials. Such laser systems must have: the key switch to prevent unauthorized use; safety device to prevent the work system cover is opened; laser emission indicator laser is working; equipped with emergency stop switch, always turn off the laser beam ; in laser danger labels and posted a good red xx (aperature) label, such laser beam and main beam reflected as very dangerous. (A 1000-watt carbon dioxide laser in a perforated steel plate, set up like what, what happens if the eye). The directivity of 200mw laser pointer is not convenient for using.
Laser with ordinary light sources, because of its high brightness, good direction, the special nature of the energy density will pose a danger. Safe use of lasers requires that all laser users and laser systems in the vicinity of all people must have sufficient knowledge of laser safety knowledge. The most important point was undoubtedly the laser eye safety. In addition to the main light, the laser system in the vicinity there is often a lot of different angles to the divergence of the light. These smooth surfaces such as light in the lens will form a mirror reflection. Although much weaker than the main light, but in terms of the human eye is still very strong, so will still damage the human eye. When the laser intensity is strong enough, it will burn skin or clothing, or even ignite volatile chemicals, such as alcohol, gasoline, ether and other organic solvents, and can damage the light sensor cameras, photodiodes; in the laser beam propagation path, even if Chuanbo some distance, you can still ignite the material; even from the back surface reflection such indirect contact with the laser, it can be dangerous. The user is not satisfied with the use of green laser pointer  due to the directivity of green laser pointer .
For these reasons, users should observe the following safety precautions: compliance with the operating manual for all safety precautions. Must be used with caution in the vicinity of the laser solvent. Only qualified personnel familiar with laser safety operations. Do not look directly at the laser light source or any reflective surface scattering from the laser beam, determined not to look down along the beam. Experimental settings remain at low altitude, to prevent inadvertently leaving the beam injected into the eye. To guard against accidental or reflected output beam irradiation, the operator should wear appropriate safety glasses specified wavelength of the laser. Avoid direct the laser, the beam intensity is easy to burn skin or ignite clothing. In a sealed room using a laser, if not controlled, the laser in a very long distance is still very parallel so there is still potentially dangerous. The laser beam within the danger zone warning signs affixed to remind all laser users and laser systems for all the laser near the danger level. Advise you that in the control room operation and limit the laser. The user is discussing the directivity of green laser pointer with the manager.