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:
Mar. 28, 2006
Filed:
Nov. 12, 2002
Shoichi Yamazaki, Kanagawa, JP;
Hideki Morishima, Tochigi, JP;
Kazutaka Inoguchi, Tochigi, JP;
Akinari Takagi, Tochigi, JP;
Motomi Matsunaga, Tochigi, JP;
Shoichi Yamazaki, Kanagawa, JP;
Hideki Morishima, Tochigi, JP;
Kazutaka Inoguchi, Tochigi, JP;
Akinari Takagi, Tochigi, JP;
Motomi Matsunaga, Tochigi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A small optical system that is capable of widening an angle of view is provided. This optical system is provided with a first surface having a reflecting action and a second surface that reflects a light beam reflected on this first surface toward the first surface again. Then, a principal ray at central angle of view that is made incident on the first surface again is reflected and travels to a side opposite to a side of the last time it was reflected from the first surface with respect to a normal line of a surface at a hit point thereof.