Title:
PROJECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/014317
Kind Code:
A1
Abstract:
This projection device 100 includes a projection optical system 10 that magnifies an image acquired from a reflective liquid crystal element 40 that is an image display element irradiated with illumination light and projects the image onto a projection screen SC. A light path separation element 91 is arranged to separate a light path and directs a portion of the light path to a position different from the position of the light path for the illumination light inside the projection optical system 10. An imaging element 60 is arranged in the light path separated by the light path separation element 91 where a portion of a beam from the projection screen SC is separated in a different direction from the light path for the projection optical system 10. First and second lens groups 11, 51 having mutually different refractive powers are arranged between the light path separation element 91 and the reflective liquid crystal element 40, and between the light path separation element 91 and the imaging element 60, respectively. The imaging angle of view is wider than the projection angle of view.
Inventors:
SANO EIGO (JP)
Application Number:
PCT/JP2016/071624
Publication Date:
January 26, 2017
Filing Date:
July 22, 2016
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
G03B21/14; G02B13/16; G02B13/18; G02B17/08; G03B17/54; G03B21/00; H04N5/74
Foreign References:
| JP2009205442A | 2009-09-10 | |||
| JP2010190939A | 2010-09-02 | |||
| JP2005266103A | 2005-09-29 | |||
| JPH08339259A | 1996-12-24 | |||
| JP2012189834A | 2012-10-04 | |||
| JP2003044839A | 2003-02-14 | |||
| JP2013073199A | 2013-04-22 | |||
| JP2010538685A | 2010-12-16 | |||
| JPH09305312A | 1997-11-28 | |||
| JP2013218262A | 2013-10-24 | |||
| JPH11355696A | 1999-12-24 |
Attorney, Agent or Firm:
FUKUDA, Mitsuhiro (JP)
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