e. A Class V Laser is either a Class II, Class III, or Class IV laser contained
in a protective housing and operated in such manner as to be incapable of emitting
hazardous radiation from the enclosure. A stringent control system shall be installed
and maintained from any laser system to qualify for this classification.
A - Most higher energy x-rays and gamma rays pass completely through the
B - For short ultraviolet, absorption occurs principally at the cornea.
C - Long ultraviolet and visible light is refracted at the cornea and lens and
absorbed at the retina.
D - Near infrared energy is absorbed in the ocular media and at the retina.
E - Far infrared absorption is localized at the cornea.
F - Microwave radiation is transmitted through the eye, although a large
percentage may be absorbed.
Figure 3-3. Absorption properties of the eye for electromagnetic radiation.
3-14. LASER PROTECTION
a. Lasers rated class II and above are potentially hazardous. The hazard to the
eye, the most sensitive organ to visible laser radiation, can be reduced by the use of
protective goggles designed to filter out the light frequencies emitted by the laser of
b. There are general safety rules that should be followed in all laser installations:
(1) Contain the beam.