Radiant energy – Radiant energy generation and sources – Plural radiation sources
Patent
1990-02-06
1991-08-20
Anderson, Bruce C.
Radiant energy
Radiant energy generation and sources
Plural radiation sources
2504941, G01J 100
Patent
active
050417355
ABSTRACT:
A miniature infrared test target that comprises a heated four-bar test target operated at a high temperature and a physically separated ambient field operated at ambient temperature. A beamsplitter is disposed relative to the test target and the field in a position to combine and transmit images thereof along a common axis. A lens is disposed along the common axis and forms a combined image of the test target and the field at its image plane. Separation of the test and field targets permits miniaturization of the test target while maintaining a temperature difference between the field and the bars that is proportional to the true temperature difference. The target overcomes the difficulty of maintaining an extremely high temperature gradient in the target. It provides a greater contrast range than that provided by conventional miniature targets. The miniature infrared test target is made with surfaces approximating a blackbody, thereby providing immunity from the Narcissus problem and the effects of complicated environmental changes.
REFERENCES:
patent: 3227879 (1966-01-01), Blau et al.
patent: 4299451 (1981-11-01), Task et al.
patent: 4446363 (1984-05-01), Lakin et al.
patent: 4598206 (1986-07-01), Nelson
patent: 4620104 (1986-10-01), Nordal et al.
patent: 4647783 (1987-03-01), Verona
patent: 4769527 (1988-09-01), Hart et al.
patent: 4859080 (1989-08-01), Titus et al.
patent: 4883971 (1989-11-01), Jensen
Bates Kenn S.
Chang David B.
Pollack Slava A.
Shih I-Fu
Anderson Bruce C.
Denson-Low Wanda
Hughes Aircraft Company
Sales Michael W.
LandOfFree
Miniature infrared test target does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Miniature infrared test target, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Miniature infrared test target will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1010276