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:
Dec. 10, 2019
Filed:
Jan. 29, 2019
Seiko Epson Corporation, Tokyo, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A projection lens includes a plurality of lens groups each formed of at least one lens, and a lens barrel adapted to support each of the lens groups from an outer circumferential side. The lens barrel includes a first temporarily holding mechanism allowing the first lens group located at an end on a enlargement side to be displaced in a direction perpendicular to the optical axis, a first adhesive applied to the first temporarily holding mechanism to fix the first lens group so as to be unable to be displaced, a second temporarily holding mechanism allowing the seventh lens group located at an end on a reduction side to be displaced in a direction perpendicular to the optical axis, and a second adhesive applied to the second temporarily holding mechanism to fix the seventh lens group so as to be unable to be displaced.