Eyes are the most sensitive organ of the human body to the laser. The widespread use of laser devices in the military sector, especially the laser blinding weapons to be used, poses a great threat to the eyes of military personnel. The co2 laser mainly damages the cornea and affects the lens. Mild damage, the cornea appears shallow turbidity; severe injury, the cornea will coagulation necrosis, vaporization perforation, and even room water delivery, pupil deformation, and even the front of the lens opacity. Green, red, near infrared laser main damage retina.
Due to the role of focusing on the light, you can make the energy density on the retina than the cornea at high lo. Times, so low doses of radiation may cause serious damage to the retina. Mild injury, the retina appeared coagulation plaque; slightly heavier, retinal coagulation spots in a bit, flaky bleeding spots or round, chrysanthemum-shaped hemorrhage to help serious injury, the retina burst, large area of bleeding into the vitreous body.
If the macular area of the retina is damaged, which is a slight injury, will make a serious decline in vision. The central area of the macula is a central fossa, although the diameter is only o.5mm, but determines the visual sharpness of the eye. The damage caused by the laser in the retina is likely to damage a large part of the central fossa, reducing visual acuity by 70 to 90%. As the eye is vulnerable to such a serious laser damage, so the military sector need to be suitable for the use of effective protective equipment. Now, the military equipment of the laser equipment is mainly laser rangefinder and laser target indicator. US Department of Defense Environmental Health Bureau after a lot of research that at this stage should be in the laser equipment testing and training to take protective measures.
The crew of the aircraft that installs the laser measuring machine and the target indicator does not need to take protective measures under normal circumstances, but if there is a mirror reflection to the airplane, it should wear a protective device with high visible light transmittance. Armored vehicle occupants, do not have to wear protective glasses in the car, but the car's optical sight device should be installed anti-laser filter. In the laser equipment test and drill exposed personnel, should take protective measures. Table 20 lists the protection requirements for several military laser equipment.
It is expected that in the near future, with laser blinding weapons and equipment, the requirements for Laser safety glasses equipment will be more urgent, the use of laser protection equipment will be more extensive.
At present, the military laser protection equipment mainly protective glasses, laser protection glasses, protective masks, protective film, filter hoodie protective goggles and protective pound suitable for exposure to laser radiation in the equipment installed on the flight helmet protective mask Suitable for aircrew use. Protective film can be pft in the ordinary flying head of the mask or other optical devices, as a one-time use of protective equipment. The filter is mounted on an optical sightseeing instrument to protect the operator's eyes from laser damage.
