The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 10, 1985
Filed:
Oct. 12, 1983
Iain A Neil, Strathblane, GB;
Barr & Stroud Limited, Glasgow, GB;
Abstract
An infrared radiation detecting system comprises an optical imaging system (25) for receiving radiation from a field of view (23) and delivering that radiation to an image surface (16). A background limited detector unit (26) having a detecting surface (.phi.) located in a cold shield housing having a cooled aperture (13) is spaced from image surface (16) and a transfer lens system (24) is interposed to transfer infrared radiation therebetween. Lens system (24) is arranged to focus the radiation at the detecting surface (.phi.) of the detector unit (26) such that the focussed radiation field curvature coincides with the physical curvature of detecting surface (.phi.), to form a pupil which is coincident in space with the position of the cooled aperture (13) and to dimension the pupil to match the dimension of the cooled aperture (13). To achieve these effects the transfer lens system (24) is formed by four lens elements (A,B,C,D) of selected power, axial spacing, and refractive surface curvature.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile