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:
Nov. 22, 2016
Filed:
Mar. 13, 2013
Dicon Fiberoptics Inc., Richmond, CA (US);
Jeffrey Lee, El Sobrante, CA (US);
DiCon Fiberoptics Inc., Richmond, CA (US);
Abstract
The color uniformity of a light spot is measured by providing an image of the light spot by means of a camera or camera sensor with sensor elements, each of the sensor elements capturing a set of three or more color component values that together define a set of pixel values at such sensor element, wherein the image includes a plurality of sets of pixel values. The method also derives for each of the plurality of sets of pixel values at a corresponding sensor element a first ratio between a first pair of the pixel values or of values obtained therefrom in such set. Preferably a second ratio is also derived between a second pair of the pixel values or of values obtained therefrom in such set, where the second pair is different from the first pair. Where the sensor elements used each provides a single intensity value instead of multiple pixel values of different colors, light is projected onto a spot of the camera or camera sensor along an optical path with a different one of three or more different color filters sequentially in the path. For each sensor element a first ratio is derived between a first pair of the intensity values of different colors provided by such sensor element or of values obtained therefrom and preferably also a second ratio is derived between a second pair of the intensity values of different colors or of values obtained therefrom provided by such sensor element different from the first pair.