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:
Apr. 27, 1999
Filed:
Dec. 09, 1997
Albert G Choate, Rush, NY (US);
Optical Gaging, Products, Inc., Rochester, NY (US);
Abstract
The illuminator has a cylindrical or truncated-conical array of LEd's producing collimated light beams that are directed onto axially-spaced, inclined surfaces formed on the outer periphery of a hollow, similarly shaped (i.e., cylindrical or truncated-conically shaped) Fresnel-like diffuser which refracts and directs rings of light beams onto the surface of a workpiece at angles of incidence ranging anywhere from 15.degree. to 80.degree.. The array of LED's surrounds the associated Fresnel-like diffuser coaxially thereof, and in turn is surrounded by a circuit board which supplies power selectively to illuminate LED's in the array thereof. The Fresnel-like diffusers have in the outer peripheral surfaces thereof circumferential grooves forming on their outer surfaces annular, prism-shaped projections which differ in shape depending upon the desired angle of incidence of the light beams that are to be projected thereby onto a workpiece.