Invention Grant
- Patent Title: Projection lens and projection display apparatus
- Patent Title (中): 投影镜头和投影显示装置
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Application No.: US13933784Application Date: 2013-07-02
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Publication No.: US08830591B2Publication Date: 2014-09-09
- Inventor: Tomoyuki Baba
- Applicant: FUJIFILM Corporation
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM Corporation
- Current Assignee: FUJIFILM Corporation
- Current Assignee Address: JP Tokyo
- Agency: Young & Thompson
- Priority: JP2011-017403 20110131
- Main IPC: G02B3/00
- IPC: G02B3/00 ; G02B9/00 ; G02B13/00 ; G02B13/04 ; G02B13/22 ; G02B5/04
Abstract:
A projection lens for projecting image information displayed on a reduction side conjugate position to a magnification side conjugate position, including a negative first lens group, a positive second lens group, a positive third lens group, and a positive fourth lens group arranged in this order from the magnification side, which satisfies predetermined conditional expressions.
Public/Granted literature
- US20130286484A1 PROJECTION LENS AND PROJECTION DISPLAY APPARATUS Public/Granted day:2013-10-31
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