Accession Number : AD0645730

Title :   EFFORT TO EVOLVE A METHOD OF EYE PROTECTION FROM FLASH BLINDNESS.

Descriptive Note : Final technical rept., 1 Oct 65-31 Aug 66,

Corporate Author : NATIONAL CASH REGISTER CO DAYTON OHIO FUNDAMENTAL RESEARCH DEPT

Personal Author(s) : Bertelson,Robert C. ; Glanz,Kenneth D. ; McQuain,David B. ; Thomson,Francis D.

Report Date : 31 AUG 1966

Pagination or Media Count : 57

Abstract : Photochromics of the spirobi(naphthopyran) classes are shown to give significant improvements over present spiropyrans when used in practical eye-protection systems. In particular, the open-state luminous transmittance of the total system was increased to 67% while still retaining the capability of closing to a luminous density of approximately 3 within 100 micro sec. The photobleaching by visible light was negligible even at intensities corresponding to a nuclear weapon range at which the aircraft and crew could not survive. The preparation of a variety of new photochromics and the necessary intermediates is described. (Author)

Descriptors :   (*OPTICAL FILTERS, *PHOTOCHROMISM), (*SPIRO COMPOUNDS, PHOTOCHROMISM), (*OXYGEN HETEROCYCLIC COMPOUNDS, PHOTOCHROMISM), POLYCYCLIC COMPOUNDS, OPTICAL PROPERTIES, THERMAL PROPERTIES, SPECTROSCOPY, NUCLEAR EXPLOSIONS, FLASHBLINDNESS, SHUTTERS(OPTICS), SYNTHESIS(CHEMISTRY), PHOTOCHEMICAL REACTIONS, DYES

Subject Categories : Radiation and Nuclear Chemistry
      Protective Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE