Infrared sensor device with temperature correction function

Details Infrared sensor device with temperature correction function Infrared sensor device with temperature correction function

1997-10-14

1999-11-30

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

2502521, 374120, 374121, 374123, 374124, 374130, G01J 506

Patent

active

059947012

ABSTRACT:
A shutter 3 which can be momentarily held open and immediately closed, is disposed adjacent to an aperture stop 4 in an optical system, and a temperature sensor 5 is provided for measuring the temperature of the shutter 3. The blades of the shutter 3 can be utilized as a reference heat source. With the shutter 3 disposed adjacent to the aperture stop 4, the optical equivalence in the case when a reference heat source is inserted and in the other case, is not spoiled. A shutter 202 which can be readily momentarily held open and immediately closed under control of a shutter controller 203, is disposed at the optical pupil position of a combination lens 201. When the shutter 202 is closed, thermal image data is stored in a shading memory 208. The shading data stored in the shading memory 8 is subtracted for each image element in a subtracter 207 from thermal image data, which is obtained by picking up external infrared image in the open state of the shutter, and the resultant difference data is outputted to a frame memory 209.

REFERENCES:
patent: 5394237 (1995-02-01), Chang et al.
patent: 5422484 (1995-06-01), Brogi et al.
patent: 5604346 (1997-02-01), Hamrelius et al.
patent: 5822222 (1998-10-01), Kaplinsky et al.

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