Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1977-01-28
1978-03-21
Willis, Davis L.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250504, 350 11, G01J 100, G02B 520
Patent
active
040805344
ABSTRACT:
Infrared detection and transmission apparatus are disclosed which incorporate an infrared transparent window consisting essentially of thorium fluoride. Due to high resistance to thermal shock, thorium fluoride window material may be used to advantage under extreme atmospheric conditions or for the transmission of infrared radiation at high power levels.
REFERENCES:
patent: 2660925 (1953-12-01), Turner
patent: 2834689 (1958-05-01), Jupnik
patent: 3744870 (1973-07-01), Tomiki et al.
Guggenheim Howard Joseph
O'Bryan, Jr. Henry Miles
Van Uitert LeGrand Gerard
Bell Telephone Laboratories Incorporated
Wilde Peter V. D.
Willis Davis L.
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