Patent ID: 8497479
Filing Date: 2013-07-30
Classification: G01J,H04N

Abstract:
1. A variable aperture infrared camera assembly, comprising: optics comprising at least two f-numbers, a radiation shield, cooling means, a central axis, a focal plane array mounted substantially coaxial and substantially perpendicular to said central axis, said radiation shield and said focal plane array being thermally connected to said cooling means, said radiation shield having an optical entrance end accepting infrared radiation passing through said optics and a thermal connection end proximal to said focal plane array providing said thermal connection to said cooling means, said radiation shield being positioned to block stray radiation from an inside surface of said infrared camera, and an optical path substantially along said central axis, infrared radiation being admitted through said optics along said optical path, passing through said optical entrance end of said radiation shield and arriving at said focal plane array, a variable aperture assembly comprising: