Accession Number : ADA017733

Title :   Evaluation of a Limiting Mirror for Laser Eye and Sensor Protection,

Corporate Author : HARRY DIAMOND LABS ADELPHI MD

Personal Author(s) : Sztankay,Z. G. ; Wellman,R. J. ; McGuire,D.

Report Date : APR 1975

Pagination or Media Count : 142

Abstract : A system to provide eye or sensor protection from laser-beam damage is investigated. Light beams exceeding a safe energy density are prevented from reaching the observer or sensor by the destruction of a mirror in the line-of-sight. The replaceable mirror consists of a 10- to 20-nm vacuum-deposited metal film on a 2- to 8-micrometer black plastic substrate. The mirror is vaporized directly by focusing the input beam on it. The vaporization, which occurs fast enough to protect against Q-switched lasers, prevents the potentially damaging radiation from reaching the eye or sensor. The energy reflected by various prototype limiting mirrors is measured as a function of the incident energy in an experimental arrangement employing 1-J Q-switched and normal-pulsed ruby, and 2-W CW argon laser beams.

Descriptors :   *LASER SAFETY, *LASER HAZARDS, *EYE, *MIRRORS, PROTECTIVE EQUIPMENT, MILITARY PERSONNEL, LASER WEAPONS, RUBY LASERS, ARGON LASERS, REFLECTION, VAPORIZATION, METAL FILMS

Subject Categories : Lasers and Masers
      Optics
      Protective Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE