Title:
LIGHT GUIDE PLATE, ILLUMINATION OPTICAL SYSTEM, AND OPTICAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/084680
Kind Code:
A1
Abstract:
A light guide plate 20 has: an incident part 22 that is a three-dimensional convex part for allowing light to be incident from a light source unit 10; a circular shaped reflective surface 24 that is a first main surface for reflecting light incident via the incident part 22 and the like; a circular shaped transmission surface 26 that is a second main surface disposed on the output side facing the reflective surface 24; and a ring shaped peripheral side surface 28 sandwiched by the reflective surface 24 and the transmission surface 26. Light from the incident part 22 is reflected at the peripheral side surface 28, scattered via the reflective surface 24, passes through the transmission surface 26, and is condensed. The light guide plate 20 makes light from the light source part 10 uniform at the output side, that is the illumination object side, and forms a light ray bundle aiming at a projection optical system 40 for the entirety of the light passing through.
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Inventors:
SHOBU TAKAHIKO (JP)
Application Number:
PCT/JP2015/082438
Publication Date:
June 02, 2016
Filing Date:
November 18, 2015
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
G02B6/00; F21S2/00; F21V7/00; F21V7/04; G02B3/08; G02B19/00; F21Y101/00; F21Y115/10; G02B13/16
Foreign References:
| JP2008027756A | 2008-02-07 | |||
| JP2000250032A | 2000-09-14 | |||
| JP2011253154A | 2011-12-15 | |||
| JP2013165044A | 2013-08-22 | |||
| JP2014153636A | 2014-08-25 |
Attorney, Agent or Firm:
FUKUDA, MITSUHIRO (JP)
Mitsuhiro Fukuda (JP)
Mitsuhiro Fukuda (JP)
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