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:
Feb. 04, 2003
Filed:
May. 05, 2000
Masayuki Nishiwaki, Yoshikawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An illumination system for illuminating a particular surface, to be illuminated, with light from a light source, includes a first optical component having an optical power with respect to a predetermined plane, and a second optical component having an optical power with respect to the predetermined plane, wherein the particular surface is illuminated through Koehler illumination with respect to a plane orthogonal to the predetermined plane and is illuminated approximately through critical illumination with respect to the predetermined plane, wherein the first and second optical components are adapted to provide an afocal system, and wherein the condition for the afocal system is disconnected when a relative position between the first and second optical components is changed, whereby an illumination range with respect to the predetermined plane, upon the particular surface, is changed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile