tailieunhanh - LASER SAFETY

Laser Safety | LASER SAFETY Lasers are divided into the following classes Class 1 Low power non-hazardous Class 2 2a Low power minor controls necessary Emit less than 1 mW visible CW radiation. Not considered hazardous for momentary sec unintentional exposure. Class 2a lasers are those class 2 lasers not intended to be viewed . supermarket scanners. Class 3a 3b Medium power direct viewing hazard little diffuse reflection hazard. Class 3a is visible lasers with 1-5 mW power output invisible lasers and those having 1-5 times the Accessible Emission Limit AEL of class 1 lasers. Class 3b is all other class 3 lasers at all wavelengths which have a power output less than 500 mW. Class 4 High power eye and skin hazard potential diffuse reflection hazard or fire hazard There are several pertinent instructions and guidelines regarding laser use. They are SPAWARINST Navy Laser Hazards Control Program MIL-HDBK-828 Laser Range Safety ANSI American National Standard for the Safe Use of Lasers Every Navy command which uses lasers must have a Laser System Safety Officer LSSO . There are two categories of LSSOs and each command should determine which type is appropriate considering their mission types of lasers being used and size of the laser safety program. The CAT I LSSO must attend formal training at Naval Safety School. They are qualified to a Calculate and or measure laser safety parameters such as Nominal Ocular Hazard Distance NOHD and required optical densities for laser eye wear b Train CAT II LSSO s c Conduct hazard surveys d Classify lasers and laser systems and e Conduct laser incident investigations and f Perform all the tasks of a CAT II LSSO. The CAT II LSSO does not have the technical capability to calculate or measure laser safety parameters and cannot serve as an instructor of other LSSO s. They are qualified to a Approve disapprove the use of local lasers b Instruct employees and supervisors on the safe use of lasers c Supervise laser operations .