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. 07, 2004
Filed:
Jun. 19, 2003
Seiko Epson Corporation, Tokyo, JP;
Abstract
A projection lens has a lens barrel in which group lenses are sequentially disposed and an optical path is set, the lens barrel having position-adjusting holes on a position orthogonal to an optical axis of a third group lens and being orthogonal with each other. The projection lens manufacturing apparatus has a projection lens holding mechanism for holding the projection lens at the lens-adjusting position; an image light irradiating mechanism which introduces the test pattern image in accordance with a light beam irradiated by a light source onto the projection lens; a lens position adjuster which adjusts the position of the third group lens along X-axis and Y-axis while detecting the image light irradiated through the projection lens; and a bonding mechanism for bonding the adjusted third group lens.