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. 25, 2021
Filed:
Jun. 23, 2020
Seiko Epson Corporation, Tokyo, JP;
Hirofumi Okubo, Matsumoto, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A projection optical apparatus includes a first lens group including a first optical axis, a first optical path deflector, a second optical path deflector, a second lens group including a second optical axis, a first lens barrel, a second lens barrel and a frame. The frame includes a frame main body and a cover frame. The frame main body includes a lens barrel attachment part including first and second openings, and first and second side parts facing each other and extending in a direction along a plane containing the first optical axis and a third optical axis between the first optical path deflector and the second optical path deflector. The cover frame is disposed at an opposite side to a lens barrel attachment part side with respect to the first and second optical path deflectors, and includes an outer circumferential part fixed to the the first and second side parts.