Title:
投写用レンズおよび投写型表示装置
Document Type and Number:
Japanese Patent JP5670602
Kind Code:
B2
Abstract:
A lens for projection substantially consists of a negative first lens with its concave surface facing a reduction side, a positive second lens with its concave surface facing the reduction side, a negative third lens with its concave surface facing a magnification side, a positive fourth lens with its convex surface facing the reduction side, a positive fifth lens and a positive sixth lens in this order from the magnification side. The reduction side is telecentric. The following conditional formulas (1) and (2) about refractive power P4 of a reduction-side surface of the second lens, refractive power P5 of a magnification-side surface of the third lens, and focal length f of an entire system are satisfied: −3.0≰1/(P4×f)≰−0.4 (1); and −2.0≰1/(P5×f)≰−0.2 (2).
Inventors:
山本 力
Application Number:
JP2014511106A
Publication Date:
February 18, 2015
Filing Date:
April 16, 2013
Export Citation:
Assignee:
富士フイルム株式会社
International Classes:
G02B13/18; G02B13/04; G02B19/00
Domestic Patent References:
| JP2012058315A | 2012-03-22 | |||
| JP2000321509A | 2000-11-24 | |||
| JPH02184809A | 1990-07-19 |
Attorney, Agent or Firm:
Seiji Yanagida
Sakuma 剛
Sakuma 剛