OPTICAL LAYERED BODY, LAYERED OPTICAL FILM, OPTICAL ARTICLE, AND VIRTUAL REALITY DISPLAY DEVICE

WIPO Patent Application WO/2023/238927

A1

The present invention addresses the problem of providing an optical layered body that can be used for a reflective circular polarizer that will cause less ghosting when applied to a virtual reality display device, an electronic viewfinder, or the like. This optical layered body comprises a first layer, a second layer, a third layer and a fourth layer, in that order. The first through fourth layers are all cholesteric liquid crystal layers and each have a light-reflecting property. The central wavelength of reflection light is in a range of 430-570 nm, in a range of 550-670 nm, in a range of 430-570 nm, and in a range of 550-670 nm, respectively, for the first through fourth layers. The sign of retardation in the film thickness direction of the first layer at a wavelength of 550 nm is the opposite of the sign of retardation in the film-thickness direction of the second layer at a wavelength of 550 nm. The sign of retardation in the film-thickness direction of the third layer at a wavelength of 550 nm is the opposite of the sign of retardation in the film-thickness direction of the fourth layer at a wavelength of 550 nm.

SANETO RYUJI (JP)
HAMACHI YOHEI (JP)
MIYAHARA KENTA (JP)

PCT/JP2023/021523

December 14, 2023

June 09, 2023

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FUJIFILM CORP (JP)

G02B5/30; B32B7/023; B32B9/00; G02B1/10; G02B1/11; G02B5/08; G02B27/02

WO2022075475A1	2022-04-14
WO2015029958A1	2015-03-05
WO2022260134A1	2022-12-15

JP2008519288A

2008-06-05

ITOH Hideaki et al. (JP)

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