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:
Jun. 29, 1993
Filed:
Aug. 09, 1990
Robert Mayerjak, Torrington, CT (US);
George Schafer, Somers, CT (US);
Kaman Aerospace Corporation, Bloomfield, CT (US);
Abstract
A device is provided for expanding, reshaping, modifying the intensity distribution and projecting a beam of radiation such as light. The present invention comprises a four sided, internally mirrored tube of polygonal (i.e., rectangular) cross-section wherein the cross-sectional area of the tube expands (generally linearly) with respect to tube length from a first end to a second end. The first end of the tube is associated with a plano-concave (or equivalent) lens and the second end of the tube is associated with a generally flat pane exit optic which includes optical edging for refracting perimeter rays back into the desired field of view. A practical application for the present invention is laser photogrammetry wherein typically it is desired (1) to expand a laser beam of circular cross-section, (2) to reshape the beam into a desired cross-section, usually rectangular, and (3) to project the reshaped beam upon a distant surface.