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|1. (WO2017175588) OPTICAL BODY, WINDOW MATERIAL, AND ROLL CURTAIN|
|Title:||OPTICAL BODY, WINDOW MATERIAL, AND ROLL CURTAIN|
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°.