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US 5,364,685 AGranted
Laminated panel with low reflectance for radio waves
AssigneeCentral Glass Company, Limited
InventorsHiroshi Nakashima, Yoshihiro Yano, Yasunobu Iida
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AssigneeCentral Glass Company, Limited
InventorsHiroshi Nakashima, Yoshihiro Yano, Yasunobu Iida
Estimating the term…
The matter of concern is the reflection of a radio wave such as a television broadcast wave from a laminated panel having a substrate low in reflectance for radio waves and a layer relatively high in reflectance for radio waves. The reflection is greatly reduced by dividing the reflective layer into a plurality of discontinuous segments by a series of relatively narrow slits such that the width of each segment in the direction parallel to the direction of the electric field of the radio wave is not greater than 1/3 of the wavelength of the radio wave. The invention is suitable for application to a heat reflecting glass with a heat reflecting film having a surface resistivity below about 500 .OMEGA./.quadrature., and in that case it is preferable that the width of each segment of the heat reflecting film is not greater than 1/20 of the wavelength.
A laminated panel having a substrate which is low in reflectance for radio waves and a layer disposed on said substrate which is relatively high in reflectance for radio waves, characterized in that said layer is divided into a plurality of discontinuous segments by a series of slits such that the width of each of said segments in a direction parallel to the direction of the electric field of a radio wave which will impinge on the laminated panel is not greater than 1/3 of the wavelength of said radio wave, whereby the reflectance of said layer for said radio wave reduces.
A heat reflecting glass panel having a heat reflecting layer over a surface of a glass plate, said heat reflecting layer having a surface resistivity not higher than 500 .OMEGA./.quadrature., characterized in that said heat reflecting layer is divided into a plurality of discontinuous segments by a series of slits such that the width of each of said segments in a direction parallel to the direction of the electric field of a radio wave which will impinge on the heat insulating glass panel is not greater than 1/20 of the wavelength of said radio wave, whereby the reflectance of the heat reflecting layer for said radio wave reduces.
A vehicle window glass comprising a glass plate, a heat reflecting layer which lies over a glass surface of said glass plate having a surface resistivity not higher than 500 .OMEGA./.quadrature. and an antenna which is disposed on another glass surface of said glass plate including a linear element as a principal element of the antenna,
Dependencies are inferred from the claim text.