Invention Grant
- Patent Title: Projection lens and projection type display device using the same
- Patent Title (中): 投影镜头和投影型显示装置使用相同
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Application No.: US12243707Application Date: 2008-10-01
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Publication No.: US07663806B2Publication Date: 2010-02-16
- Inventor: Yukiko Nagatoshi
- Applicant: Yukiko Nagatoshi
- Applicant Address: JP Saitama
- Assignee: Fujinon Corporation
- Current Assignee: Fujinon Corporation
- Current Assignee Address: JP Saitama
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JPP2007-277606 20071025
- Main IPC: G02B13/00
- IPC: G02B13/00 ; G02B3/00
Abstract:
A projection lens includes, in order form a magnification side: a first lens group having negative refractive power; and a second lens group having positive refractive power. An aspheric lens is arranged on the most magnification side of the first lens group. The conditional expressions 3
Public/Granted literature
- US20090109543A1 PROJECTION LENS AND PROJECTION TYPE DISPLAY DEVICE USING THE SAME Public/Granted day:2009-04-30
Information query
