Title:
光源装置
Document Type and Number:
Japanese Patent JP4077484
Kind Code:
B2
Abstract:
There is provided a light source device which can miniaturize a two-dimensional image display device as small as possible. The light source device is provided with three coherent light sources (11a), (11b), and (11c) corresponding to red, blue, and green; prisms (12a) and (12c) for reflecting lights emitted from the coherent light sources (11a) and (11c); and a diffraction part (20) comprising a single volume hologram on which plural gratings are multiply-formed, which gratings diffract the light emitted from the coherent light source (11b), and the lights that are emitted from the coherent light sources (11a) and (11c) and reflected by the prisms (12a) and (12b) so that these lights propagate in the same optical path.
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Inventors:
Kenichi Kasumi
Mizuuchi official
Akihiro Morikawa
Kazuhisa Yamamoto
Mizuuchi official
Akihiro Morikawa
Kazuhisa Yamamoto
Application Number:
JP2005517447A
Publication Date:
April 16, 2008
Filing Date:
January 26, 2005
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
G03B21/14; G02B5/32; G03B21/00; H04N9/31
Domestic Patent References:
| JP2003330109A | ||||
| JP2000321435A | ||||
| JP2003215705A | ||||
| JP2003195213A | ||||
| JP2000242192A |
Attorney, Agent or Firm:
Kenichi Hayase