Accession Number : ADB160701

Title :   Ocular Shields for Protection against Laser Radiation and Ballistic Fragments. Phase 1.

Descriptive Note : Final rept. 15 Aug 88-26 Apr 89,

Corporate Author : GUMBS ASSOCIATES INC EAST BRUNSWICK NJ

Personal Author(s) : Gumbs, Ronald E.

Report Date : 15 FEB 1989

Pagination or Media Count : 37

Abstract : The primary objective of this project was to determine the feasibility of an optically switching laser blocking plastic with broad band capability that can be used for ocular protection against ballistic fragments and multiwavelength lasers without degrading essential visual performance. The work involved the evaluation of thin polymeric films containing charge transfer complexes which absorb in the visible and produce highly absorbing species when irradiated. An absolute method was used to measure the amount of laser radiation absorbed by the sample and the switching time of the device. Combined with flash photolysis, it gave data on rise and fall times, cycle life, and protective and damage threshold limits. The most significant finding was that switching takes place in less than a nanosecond at intensities as low 10 mJ/sq cm with broad protection. Because the feasibility of the concept was successfully demonstrated early in the program, and the need for adequate protection at low intensities, the scope of the project was expanded to investigate the feasibility of photoinduced scattering and reflection using charge transfer complexes.

Descriptors :   *PROTECTION, BALLISTICS, BROADBAND, CHARGE TRANSFER, DAMAGE, EYE, FLASHES, FRAGMENTS, LASER BEAMS, LIFE CYCLES, LIMITATIONS, LOW INTENSITY, PHOTOLYSIS, POLYMERIC FILMS, SHIELDING, SWITCHING, THIN FILMS, THRESHOLD EFFECTS, TIME, VISUAL PERCEPTION.

Subject Categories : Protective Equipment
      Coatings, Colorants and Finishes

Distribution Statement : APPROVED FOR PUBLIC RELEASE