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:
Sep. 12, 2023
Filed:
Jan. 22, 2021
Seiko Epson Corporation, Tokyo, JP;
Eiji Morikuni, Matsumoto, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A projection system includes a first optical system and a second optical system including an optical element and disposed on the enlargement side of the first optical system. The optical element has a first transmissive surface, a first reflection surface disposed on the enlargement side of the first transmissive surface, a second reflection surface disposed on the enlargement side of the first reflection surface, and a second transmissive surface disposed on the enlargement side of the second reflection surface. The second reflection surface has a concave shape. A first optical axis of the first optical system and a second optical axis of the second reflection surface intersect each other.