Shade reducing aperture stop for thermal imaging systems

Details Shade reducing aperture stop for thermal imaging systems Shade reducing aperture stop for thermal imaging systems

1977-06-03

1978-08-22

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250353, 350 17, G01J 100, G02B 2106

Patent

active

041091493

ABSTRACT:
An aperture stop is provided near the detector imaging lens of a thermal imaging system to prevent the infrared detector from viewing portions of the thermal imaging system itself, particularly the walls of the optical housing and the housing of the scanner within the optical housing. This eliminates "shading" problems which can occur in thermal imaging systems having a moving scanner within the optical housing.

REFERENCES:
patent: 3867633 (1975-02-01), Patrick et al.
patent: 3905675 (1975-09-01), McCracken

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