ROBERT JOHN HERRING
Pilots at George Rd, Maynard, MA

6144031, Nov 7, 2000

Apr 21, 1997

8/845124

Robert J. Herring - Maynard MA
Andrew C. Neilson - Groton MA
Daniel L. Manitakos - Peabody MA
Charles L. Confer - Bolton MA
Kevin J. Haded - Chelmsford MA
Uri Bin-Nun - Keene NH

Inframetrics Inc. - North Billerica MA

G01J 516, G01J 506

250352

An infrared video camera system comprises an uncooled infrared sensor mounted and a thermally conductive thin walled radiation shield for shielding radiation from reaching an active surface of the uncooled infrared sensor. A TEC maintains the sensor active surface and the radiation shield at a substantially constant temperature. The uncooled infrared sensor and radiation shield are further housed in a hollow thermally conductive vacuum cover which is vacuum sealed with a base assembly and includes a vacuum sealed infrared transparent window in an aperture at a top end of the vacuum cover for allowing infrared radiation to reach the active surface and for forming a vacuum chamber enclosing the infrared sensor and radiation shield. A relay optical cell mounted to a camera body comprises at least one optical element for relaying an image formed at its entrance onto the active surface. An imaging optical assembly is interchangeably mounted to the relay optical cell and comprises at least one optical element for imaging an infrared scene to be imaged onto the entrance aperture of the relay cell.