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:
Oct. 29, 2002
Filed:
Oct. 18, 2001
Dong Ha Kim, Kyungki-Do, KR;
Jong Myung Park, Kyungki-Do, KR;
Samsung Electro-Mechanics Co., Ltd., Kyungki-Do, KR;
Abstract
Disclosed is a projection lens of a projection display apparatus including a first lens group arranged upstream from a screen, the first lens group having a negative power and including at least one aspherical lens element and at least three spherical lens elements, the lens element of the first lens group spaced away from the screen by a maximum distance having a positive power, a second lens group arranged upstream from the first lens group, the second lens group having a positive power and including a triple cemented lens composed of three lens elements cemented together, and at least one lens element arranged at one side of the triple cemented lens opposite to the screen, and an aperture stop arranged between the first and second lens groups.