Original document(22 pages) Authorized document(26 pages) 中文版
    A projection lens for use with LCD or DMD panels is provided. The lens has three lens units, the first unit having a weak power, at least one aspheric surface, a high dispersion negative lens element, and a low dispersion positive lens element, the second lens unit having a positive power, and the third lens unit having a negative power and an overall meniscus shape. The projection lens satisfies the following relationships:0.3>D23/f0>0.1,|f1|/f0>1.3, andBFL/f0>0.3.
Application Number
申请号		 97105517 Application Date
申请日		 1997.05.29
Title 名称 Long focal length projection lenses
Publication Number
公开号		 1167924 Publication Date
公开日		 1997.12.17
Approval Pub. Date 2003.08.13 Granted Pub. Date 2003.08.13
International Classification 分类号 G02B3/02
Applicant(s) Name
申请人		 U.S. Precision Lens Inc.
Address 地址
Inventor(s) Name 发明人 Jacob Moskovich
Attorney & Agent 代理人 ZHANG ZHENGQUAN
More information 更  多  信  息


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