EFFORT TO EVOLVE A METHOD OF EYE PROTECTION FROM FLASH BLINDNESS.
Final technical rept., 1 Oct 65-31 Aug 66,
NATIONAL CASH REGISTER CO DAYTON OHIO FUNDAMENTAL RESEARCH DEPT
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Photochromics of the spirobinaphthopyran 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
- Radiation and Nuclear Chemistry
- Protective Equipment