Invention Grant
US09201221B2 Wide-angle projection lens and projection display device using the same
有权
广角投影镜头和投影显示装置使用相同
- Patent Title: Wide-angle projection lens and projection display device using the same
- Patent Title (中): 广角投影镜头和投影显示装置使用相同
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Application No.: US14064961Application Date: 2013-10-28
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Publication No.: US09201221B2Publication Date: 2015-12-01
- Inventor: Hiroshi Yamada
- Applicant: FUJIFILM Corporation
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM Corporation
- Current Assignee: FUJIFILM Corporation
- Current Assignee Address: JP Tokyo
- Agency: Young & Thompson
- Priority: JP2011-107114 20110512
- Main IPC: G02B13/18
- IPC: G02B13/18 ; G02B13/04 ; G02B13/16 ; G02B13/22

Abstract:
A first lens group including two aspherical lenses, a second lens group consisting of three negative meniscus lenses, each negative meniscus lens having a convex surface facing the enlargement side, a third lens group having a negative refractive power and including at least one cemented lens, and a fourth lens group having a positive refractive power and including at least two cemented lenses and one aspherical lens are arranged in this order from the enlargement side. Predetermined conditional expressions are satisfied.
Public/Granted literature
- US20140049835A1 WIDE-ANGLE PROJECTION LENS AND PROJECTION DISPLAY DEVICE USING THE SAME Public/Granted day:2014-02-20
Information query