Thermal imager

Details Thermal imager Thermal imager

1989-05-15

1991-06-04

Fields, Carolyn E.

Radiant energy

Infrared-to-visible imaging

250352, G01J 506

Patent

active

050216570

ABSTRACT:
A thermal imager employs an intermediate field stop (8) which is preferably placed at an intermediate image plane (P) in front of a cryogenically cooled detector (1) mounted on a substrate (2). Radiation gathered by a telescope is directed onto the detector through an aperture (9) in the field stop. The field stop limits the rays which are emitted by the detector and substrate and which are subsequently retro-reflected back to the detector (called narcissus rays).

REFERENCES:
patent: 4011452 (1977-03-01), Meyers
patent: 4380363 (1983-04-01), Fjeldsted
patent: 4453800 (1984-06-01), Fjeldsted
patent: 4593322 (1986-06-01), Abel
patent: 4933555 (1990-01-01), Smith

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