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1. (WO2017175588) OPTICAL BODY, WINDOW MATERIAL, AND ROLL CURTAIN

Pub. No.:    WO/2017/175588    International Application No.:    PCT/JP2017/011520
Publication Date: Fri Oct 13 01:59:59 CEST 2017 International Filing Date: Thu Mar 23 00:59:59 CET 2017
IPC: G02B 5/26
E06B 9/24
G02B 5/00
G02B 5/08
Applicants: DEXERIALS CORPORATION
デクセリアルズ株式会社
Inventors: ARIMA Mitsuo
有馬 光雄
SHIBUYA Atsushi
澁谷 篤史
NAGAHAMA Tsutomu
長浜 勉
Title: OPTICAL BODY, WINDOW MATERIAL, AND ROLL CURTAIN
Abstract:
An optical body according to the present invention comprises: a first optical transparent layer that has quadrangular pyramid shaped depressed sections; a wavelength-selective reflecting layer that is formed upon the depressed sections and selectively reflects light of a specified wavelength band; and a second optical transparent layer that is formed upon the wavelength-selective reflecting layer. For this optical body, when an angle of incidence is (θ,φ) (provided that θ is an angle created by incident light that is incident on an incidence surface and a line perpendicular to the second optical transparent layer acting as the incidence surface, and φ is an angle created by a specified straight line on the incidence surface and a component formed by projecting the incident light onto the incidence surface), the average reflection angle of reflected light to the same quadrant as the incident light is 30° or more with respect to the incident light that is incident on the incidence surface from a φ-direction varying by θ=60°.