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Title:
PROJECTION OPTICAL SYSTEM AND PROJECTOR
Document Type and Number:
WIPO Patent Application WO/2020/137884
Kind Code:
A1
Abstract:
Provided is a projection optical system (10) that projects a first image (IM0) on a reduction side (2) toward an enlargement side (3), the projection optical system including: a first optical system (11) including a plurality of lenses; and a second optical system (12) including a first reflective face (13) located on the enlargement side and having a positive refractive power. The first optical system renders a first intermediate image (IM1), formed inside the first optical system by light incident from the reduction side, into a second intermediate image (IM2) on the enlargement side with respect to the first optical system. The first optical system includes: a first refractive optical system (15) including a first optical axis (21), which is shifted in a first direction (31) relative to center light (20) of the first image; and a second refractive optical system (16) including a second optical axis (22), which is shifted in the first direction relative to the first optical axis (21).

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Inventors:
ITO SATOSHI (JP)
Application Number:
PCT/JP2019/050095
Publication Date:
July 02, 2020
Filing Date:
December 20, 2019
Export Citation:
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Assignee:
NITTOH INC (JP)
International Classes:
G02B17/08; G02B13/16; G02B13/18; G02B15/167; G03B21/14
Foreign References:
JP2018005248A2018-01-11
JP2012108267A2012-06-07
US20110267687A12011-11-03
Attorney, Agent or Firm:
IMAI, Akira (JP)
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