To improve the quality of optical communications or imaging via a window.
A transparent conductor 14 is formed on the full surface of a window 11, a temperature sensing switch is closed to supply a power supply current to the transparent conductor 14 when a temperature drops below a level where there is a possibility of snowfall, and the window 11 is warmed by Joule heat of the transparent conductor to melt snow. After the snow melting, dusts in the snow are stuck as stains to the surface of the window 11, but a photocatalyst mixed in the window 11 is activated by light energy to dissolve the stuck stains strongly. Also, by changing waterdrops stuck into a uniform water film by superhydrophilicity of the photocatalyst fogging caused by a temperature difference between the inside and the outside of the light entrance/exit window of an automobile or waterdrops generated by rainfall is prevented.
KIMATA SHINJI
ICHIOKA TETSUYOSHI
TERAMOTO YASUNOBU
SUMITOMO WIRING SYSTEMS
SUMITOMO ELECTRIC INDUSTRIES
TOYODA GOSEI KK
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