Accession Number : AD0163754

Title :   Optical Shutter Composition and Method of Producing Same.

Descriptive Note : Patent,

Corporate Author : OFFICE OF THE SECRETARY OF THE ARMY WASHINGTON D C

Personal Author(s) : Hersh,Herbert N.

Report Date : 21 DEC 1971

Pagination or Media Count : 3

Abstract : The invention relates to chemical compositions which demonstrate a change from transparency to opacity upon exposure to radiation and more particularly, the invention relates to monocrystalline doped alkali halide compositions, and methods of producing same. The use of nuclear blasts as weapons or for excavation or other peaceful uses, has posed a number of problems related to the physical protection of personnel outside of the blast or total destruction area, but within viewing distance of the blast. One such problem already encountered is retinal burn or destruction caused by nuclear blasts, commonly known as flash blindness. Visual protection against thermal radiation emitted during nuclear blasts requires the use of a fast optical shutter through which viewing can be done under normal conditions. Such a shutter, normally open, would close in the event of a nuclear explosion within the field of view.

Descriptors :   (*SHUTTERS(OPTICS), *PATENTS), ALKALI METAL COMPOUNDS, HALIDES, COLOR CENTERS, THERMAL RADIATION, HEAT SHIELDS, EYE, RADIOBIOLOGY

Subject Categories : Optics
      Protective Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE