Title:
PROJECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/080114
Kind Code:
A1
Abstract:
This projection device is provided with an illumination optical system 20, a polarized beam splitter 30, an image display element 40, a projection optical system 10, and an imaging element 60, wherein the imaging element 60 is arranged on the side in which P-polarized light having lesser reflection light components on a projection surface 1a transmits, and influence of unnecessary reflection light on the projection surface 1a, including S-polarized light at a high rate, is reduced. Further, for illumination light, the imaging element 60 is arranged on the side in which the S-polarized light is emitted from the polarized beam splitter 30, and a reflection-type liquid crystal element 40 is arranged on the side in which the P-polarized light is emitted from the polarized beam splitter 30. A polarized beam restriction section 80 for cutting the S-polarized light is provided between the polarized beam splitter 30 and the imaging element 60, and accordingly the S-polarized light can be prevented from entering the imaging element 60 directly and influence of stray light in the optical system can be inhibited.
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Inventors:
SANO EIGO (JP)
Application Number:
PCT/JP2015/079126
Publication Date:
May 26, 2016
Filing Date:
October 15, 2015
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
G03B21/14; G02B27/18; H04N5/225; H04N5/232; H04N5/74; G03B21/00
Foreign References:
| JP2001343703A | 2001-12-14 | |||
| JP2010271717A | 2010-12-02 | |||
| JP2009128619A | 2009-06-11 | |||
| JP2003044839A | 2003-02-14 | |||
| JP2007052218A | 2007-03-01 | |||
| JP2012068364A | 2012-04-05 | |||
| JP2009047969A | 2009-03-05 |
Attorney, Agent or Firm:
FUKUDA, MITSUHIRO (JP)
Mitsuhiro Fukuda (JP)
Mitsuhiro Fukuda (JP)
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