Miniature cryogenic shutter assembly

Details Miniature cryogenic shutter assembly Miniature cryogenic shutter assembly

2006-02-07

2006-02-07

Hannaher, Constantine (Department: 2878)

Radiant energy

Calibration or standardization methods

C250S351000

Reexamination Certificate

active

06995359

ABSTRACT:
A calibration method for radiometric imaging systems that relies on an absolute measurement of scene radiance (thereby requiring a baseline measurement of zero radiance), and a shutter assembly for taking the baseline measurement of zero radiance which is operable under cryogenic temperatures as low as 80.5K (−192.65° C.) in vacuums measuring <10−6torr (mm Hg). The shutter assembly generally includes an actuator and a shutter mechanism. The actuator is preferably a miniature solenoid assembly capable of operation in extreme environments (e.g. vacuums of <10−6torr, temperatures below 90K). The shutter mechanism preferably includes a single shutter blade and is also capable of operation when subjected to extreme environments. The method of using the shutter assembly provides a zero radiance reference measurement for an infrared imaging system, thereby providing a basis upon which absolute scene radiance may be determined.

REFERENCES:
patent: 3169189 (1965-02-01), Barnes et al.
patent: 3617745 (1971-11-01), Reed
patent: 4286856 (1981-09-01), McGrath
patent: 4592083 (1986-05-01), O'Brien
patent: 4778254 (1988-10-01), Gilliland, III et al.
patent: 4799767 (1989-01-01), Woodruff
patent: 4880293 (1989-11-01), Gilliland, III et al.
patent: 4995700 (1991-02-01), Barney et al.
patent: 5128796 (1992-07-01), Barney et al.
patent: 5258874 (1993-11-01), Bajat et al.
patent: 5384661 (1995-01-01), Geyer et al.
patent: 5675149 (1997-10-01), Wood et al.
patent: 5994701 (1999-11-01), Tsuchimoto et al.
patent: 6023061 (2000-02-01), Bodkin
patent: 6875979 (2005-04-01), Cope
patent: 2004/0135989 (2004-07-01), Klebe
patent: 02027224 (1990-01-01), None

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