Title:
PROJECTION OPTICAL SYSTEM AND IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/075341
Kind Code:
A1
Abstract:
This projection optical system is provided with: a dioptric system having positive refractive power as a whole and having, as a reference, a reference axis disposed at a position on which image light from a primary image plane is incident; and a catoptric system having a reflection plane that reflects the image light emitted from the dioptric system toward a projection plane forming a secondary image plane, and configured such that in a light beam effective range in which the image light is incident, the shape of the reflection plane becomes a rotationally symmetric aspherical shape having a sag amount in a direction opposite to the dioptric system with the reference axis as a rotation axis, and the shape within a cross section including the reference axis of the reflection plane has a shape inclined to approach a right angle in a region farthest from the reference axis in comparison with a region closest to the reference axis.
Inventors:
NISHIKAWA JUN (JP)
NISHIYAMA MARIKO (JP)
NAKAMURA TOMOHARU (JP)
NISHIYAMA MARIKO (JP)
NAKAMURA TOMOHARU (JP)
Application Number:
PCT/JP2020/038092
Publication Date:
April 22, 2021
Filing Date:
October 08, 2020
Export Citation:
Assignee:
SONY CORP (JP)
International Classes:
G02B17/08; G02B13/18; G03B21/00; G03B21/28
Foreign References:
| US20180210181A1 | 2018-07-26 | |||
| JP2012008353A | 2012-01-12 | |||
| US20110002051A1 | 2011-01-06 | |||
| JP2015060090A | 2015-03-30 | |||
| JP2017010023A | 2017-01-12 | |||
| JP2009271372A | 2009-11-19 |
Attorney, Agent or Firm:
TSUBASA PATENT PROFESSIONAL CORPORATION (JP)
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