Invention Grant
- Patent Title: Projection zoom lens and projection type display device
- Patent Title (中): 投影变焦镜头和投影型显示装置
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Application No.: US14263312Application Date: 2014-04-28
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Publication No.: US08896929B2Publication Date: 2014-11-25
- Inventor: Tomoyuki Baba , Masaru Amano , Akiko Nagahara
- Applicant: FUJIFILM Corporation
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM Corporation
- Current Assignee: FUJIFILM Corporation
- Current Assignee Address: JP Tokyo
- Agency: Young & Thompson
- Priority: JP2011-234549 20111026
- Main IPC: G02B15/14
- IPC: G02B15/14 ; G02B15/177 ; G02B15/04 ; G02B13/00

Abstract:
A negative first lens group, a positive second lens group, a negative third lens group, a positive fourth lens group, a negative fifth lens group, and a positive sixth lens group are disposed in this order from the magnification side. The reduction side is made telecentric. While changing magnification, the second lens group through the fifth lens group are moved, and the first lens group and the sixth lens group are fixed. Predetermined conditional expressions are satisfied.
Public/Granted literature
- US20140226219A1 PROJECTION ZOOM LENS AND PROJECTION TYPE DISPLAY DEVICE Public/Granted day:2014-08-14
Information query