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:
May. 03, 2016
Filed:
Feb. 13, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
The Arizona Board of Regents on Behalf of the University of Arizona, Tucson, AZ (US);
Masatsugu Nakano, Tucson, AZ (US);
Jose Manuel Sasian-Alvarado, Tucson, AZ (US);
Tamer T. Elazhary, Tucson, AZ (US);
Canon Kabushiki Kaisha, Tokyo, JP;
The Arizona Board of Regents on Behalf of the University of Arizona, Tuscon, AZ (US);
Abstract
A catadioptric system includes a first catadioptric group, a second catadioptric group, and a lens group disposed in axial alignment with each other. The first catadioptric group includes a solid lens having an input surface, a primary reflective surface, secondary reflective surface and an exit surface. The primary reflective surface is a curved surface concave towards the secondary reflective surface. A light flux entering through the input surface undergoes more than two reflections between the primary and secondary reflective surfaces, prior to exiting through the exit surface. At least one of the primary reflective surface and secondary reflective surface has a continuous and smooth topological profile.