Accession Number : AD0472680


Title :   ULTRAVIOLET PHOSPHOR DEVELOPMENT FOR AN ACTIVE OPTICAL IMAGING SYSTEM.


Descriptive Note : Final development rept. 15 Jun 64-15 Jun 65.


Corporate Author : WESTINGHOUSE DEFENSE AND ELECTRONIC SYSTEMS CENTER BALTIMORE MD AEROSPACE DIV


Report Date : 20 Jul 1965


Pagination or Media Count : 86


Abstract : Cathodoluminescent powdered phosphors with primary emission in the ultraviolet region were synthesized and investigated for high-power radiant output, long life maintenance capability and short decay time. The materials studied were doped and undoped aluminum oxide, lead and thallium-doped silicates, borates, and germanates, and undoped beryllium silicate. These materials were investigated in demountable or sealed-off cathode ray tubes. Results were compared to a standard set by P-16 phosphor (calcium magnesium silicate: cerium). A number of samples were found to be superior to P-16 for flying spot scanner and other high-power output applications. Calcium silicate:lead (3380 A) and barium silicate:lead (3520 A) both have radiative power output twice that of P-16 under high beam power inputs. Both also have superior aging characteristics; the decay times are of the same order of magnitude. The efficiencies of calcium borate:lead (2700 A) and calcium silicate:cadmium (3550 A) are about the same as those of P-16 under high-power excitation, but the far ultraviolet emission of the former is desirable for secure optical systems. (Author)


Descriptors :   NAVAL RESEARCH , ULTRAVIOLET RADIATION , OXIDES , THALLIUM , BORATES


Distribution Statement : APPROVED FOR PUBLIC RELEASE