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:
Aug. 04, 2026
Filed:
Feb. 26, 2024
Seiko Epson Corporation, Tokyo, JP;
Eiji Morikuni, Matsumoto, JP;
Kana Hatano, Matsumoto, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A relay system includes a first lens group formed of a plurality of lenses and having positive power, a second lens group including a diaphragm and at least one negative lens and having negative power, and a third lens group formed of a plurality of lenses and having positive power. The number of lenses of the first lens group and the number of lenses of the third lens group are equal to each other. The arrangement of the lens power of the plurality of lenses of the first lens group, which are arranged from the enlargement side toward the reduction side, is the same as the arrangement of the lens power of the plurality of lenses of the third lens group, which are arranged from the reduction side toward the enlargement side. The enlargement-side and reduction-side portions of the relay system are telecentric portions.