Thermal black-hole mask

Details Thermal black-hole mask Thermal black-hole mask

1984-02-16

1991-11-12

Buczinski, Stephen C.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250330, 250353, 250526, G01J 100

Patent

active

050650262

ABSTRACT:
The black hole which a cryogenically-cooled infrared (thermal) detector ctes in a scene being observed by another such detector is obscured by inserting a partial transmitter-reflector on the optical axis of the detector. A black-body radiator projects an ambient-temperature image the same size and shape as the black hole onto the transmitter-reflector such that the other detector sees a combined image with no apparent black hole.

REFERENCES:
patent: 3780293 (1973-12-01), Flint
patent: 4222632 (1980-09-01), Eichweber
patent: 4421985 (1983-12-01), Billingsley et al.

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