Title:
照明光学装置及びこれを用いた投写型表示装置
Document Type and Number:
Japanese Patent JP3680999
Kind Code:
B2
Abstract:
A conventional optical illumination device has a problem in which uneven brightness appears in an inclining direction when an illuminated region inclined with respect to an optical axis is illuminated.An optical illumination device is formed by using a front optical illumination system, an eccentric lens, and a relay lens. The front optical illumination system is composed of a lamp, an elliptical-surface mirror, a UV-IR cut filter, a condenser, a first lens, and a second lens.The relay lens conjugates a second light-emitting surface and a third light-emitting surface that are inclined with respect to an optical axis.The eccentric lens is made eccentric with respect to an optical axis, effectively emits light, which is emitted from the second lens, to the relay lens, and inclines the second light-emitting surface in a direction in which brightness gradient appearing on the relay lens is canceled.
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Inventors:
Mitsuhiro Wada
Yoshihiro Masumoto
Yoshimasa Fushimi
Yoshihiro Masumoto
Yoshimasa Fushimi
Application Number:
JP2002534919A
Publication Date:
August 10, 2005
Filing Date:
October 03, 2001
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
G02B19/00; G02B27/00; G03B21/00; H04N5/74; H04N9/31; (IPC1-7): G03B21/14; G02B26/00; G02F1/13; G02F1/13357; G03B21/00
Domestic Patent References:
| JP7311363A |
Attorney, Agent or Firm:
Masamichi Matsuda
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