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:
Sep. 04, 1979
Filed:
Oct. 07, 1977
Rex W Goranson, Placitas, NM (US);
II-VI Incorporated, Glenshaw, PA (US);
Abstract
An instrument for determining the vergence of a beam in the infrared spectrum, particularly a laser beam, includes a wedged shear plate of suitable infrared transmissive material; a flat plate detector; parallel, spaced bars or strips of bolometric material, such as bismuth, applied to the plate in a pattern so as to match the 'null' interferometric modulation from the wedged shear plate and alternately electrically connected to provide a pair of parallel electrical circuits providing signals for comparison; means for rotating and tilting the detector to provide 'null' readout from the compared signals and means for directly measuring the vergence of the beam by a measure of the amount of rotation and tilt required to achieve a 'null' readout.