Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1993-09-14
1996-02-20
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250332, 250334, 250351, G01J 502, G01J 506, G01J 508
Patent
active
054931185
ABSTRACT:
A thermal image detecting system includes a moving part having pyroelectric thermal detection element, a chopper for opening/closing a path of infrared rays and a chopper temperature detection element, a rotating section for rotating the moving part, a drive control section for driving the chopper and the rotating section, a band amplifier for amplifying a detection signal from the pyroelectric thermal detection element, a timing output section for outputting a signal synchronous with an opening/closing operation of the chopper, a peak detection section for successively holding the maximum value and the minimum value of a signal from the band amplifier, and an operational processing section for performing operational processing on a thermal image signal on the basis of a difference between the maximum value and the minimum value or a difference between a reference signal from the band amplifier in a closed state of the chopper and the maximum value, or the minimum value and the temperature of the chopper.
REFERENCES:
patent: 3350562 (1967-10-01), Flint
patent: 3536917 (1970-10-01), Desvignes
patent: 3646267 (1972-02-01), Tompsett
patent: 4481535 (1984-11-01), Hodd et al.
patent: 4804844 (1989-02-01), Lee
patent: 5001657 (1991-03-01), Yagura et al.
patent: 5262647 (1993-11-01), Kumada
patent: 5283551 (1994-02-01), Guscott
Patent Abstracts of Japan vol. 011, No. 230 (P-599) 28 Jul. 1987 & JP-A-62 044 634 (Fujitsu Ltd.) 26 Feb. 1987.
Mukai Yasuhito
Nakayama Morihiro
Okuda Isamu
Tokushige Satoshi
Fields Carolyn E.
Glick Edward J.
Matsushita Electric - Industrial Co., Ltd.
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