WINDOW GLASS

WIPO Patent Application WO/2013/005745

A1

Provided is window glass that can control the amount of transmittance of infrared rays in accordance with the angle of incidence of solar light, and can effectively use the light energy of the infrared rays that are not transmitted. The window glass (3) is equipped with: laminated glass (main window glass body (6)) in which two glass sheets (50) and a diffraction grating sheet (1) sandwiched therebetween are pasted together with an intermediate film (52) therebetween; and a solar cell (62) disposed at both the top side and bottom side of the laminated glass main window glass body (6). The diffraction grating sheet (1) has: a transparent resin layer (10) having a first primary surface and a second primary surface that are parallel to each other; and a diffraction grating (20) comprising a plurality of lattice lines (22) disposed parallel to each other and at a predetermined pitch. The lattice lines (22) comprise a thin film of a material having a different refractive index from that of the transparent resin layer (10). The lattice lines (22) preferably are embedded in the transparent resin layer (10) in a manner so as to have a lengthwise direction extending parallel to the first primary surface and the second primary surface of the transparent resin layer (10).

IKEDA YASUHIRO (JP)
SAKAMOTO HIROSHI (JP)
KAIDA YURIKO (JP)

PCT/JP2012/067003

January 10, 2013

July 03, 2012

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ASAHI GLASS CO LTD (JP)
IKEDA YASUHIRO (JP)
SAKAMOTO HIROSHI (JP)
KAIDA YURIKO (JP)

C03C27/12; C03C17/32; C03C27/06; E06B5/00

JP2008126631A	2008-06-05
JPH03198023A	1991-08-29
JP2001298515A	2001-10-26

SENMYO, Kenji et al. (JP)
Spring name Kenji (JP)

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