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. 21, 2017
Filed:
Dec. 22, 2011
Yuuki Maeda, Utsunomiya, JP;
Takashi Sudo, Utsunomiya, JP;
Hiroyuki Kodama, Utsunomiya, JP;
Yu Yamauchi, Yokohama, JP;
Yuuki Maeda, Utsunomiya, JP;
Takashi Sudo, Utsunomiya, JP;
Hiroyuki Kodama, Utsunomiya, JP;
Yu Yamauchi, Yokohama, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An illumination optical system includes a first compression system configured to compress a light flux on each of first and second sections, a second compression system configured to compress the light flux on the first section, a polarization converter arranged so that a section that contains a normal of the second polarization splitting surface and the optical axis becomes the second section, and configured to convert non-polarized light into linearly polarized light, a first lens array arranged in front of the polarization converter along an optical path, and a second lens array arranged between the first lens array and the polarization converter along the optical path. Both of the first lens array and the second lens array have no optical power on the second section.