REFLECTION OPTICAL SYSTEM AND PROJECTION DISPLAY DEVICE

WIPO Patent Application WO/2022/044674

A1

This reflection optical system is capable of enlarging an image on an image display surface so as to form an enlarged image on a projection surface. The reflection optical system comprises, in series along an optical path and in this order from the expansion side, a first reflection surface having a curvature and a second reflection surface having a curvature, wherein an intermediate image is formed at a position that is between the first reflection surface and the second reflection surface and that is conjugate to the image display surface. An intermediate image of a first main light beam which is incident on the projection surface at a minimum angle of incidence is located on the first reflection surface side of a boundary. Located on the second reflection surface of the boundary is an intermediate image of a second main light beam that passes through a point which, with respect to the intersection between a central main light beam and the projection surface, is symmetrical to the intersection between the first main light beam and the projection surface.

JPS6084345	[Title of the device] A visual recognition device for vehicles
JP2021107164	HEAD-UP DISPLAY DEVICE
JP7330702	device, mobile

AMANO MASARU (JP)

PCT/JP2021/027944

March 03, 2022

July 28, 2021

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FUJIFILM CORP (JP)

G02B17/00

JP2008145705A	2008-06-26
JP2004061959A	2004-02-26
JP2004061961A	2004-02-26
JP2005024716A	2005-01-27
JP2017026849A	2017-02-02

TAIYO, NAKAJIMA & KATO (JP)

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