Optical: systems and elements – Protection from moisture or foreign particle – Humidity or temperature control
Patent
1997-07-21
1998-12-29
Nguyen, Thong
Optical: systems and elements
Protection from moisture or foreign particle
Humidity or temperature control
359507, 359509, G02B 508
Patent
active
058547088
ABSTRACT:
An anti-fog element includes a transparent substrate such as a glass substrate, a transparent film of a photocatalyzer such as TiO.sub.2 catalyzing a photocatalytic reaction on the transparent substrate, and a film of a transparent porous inorganic oxide such as SiO.sub.2 formed on the film of the photocatalyzer and having a surface exhibiting a hydrophilic property. Organic matters etc. deposited in openings of the porous inorganic oxide film are dissolved and removed by a photocatalytic reaction caused by light excitation of the photocatalyzer film whereby the anti-fog property of the anti-fog element can be maintained over a long period of time.
REFERENCES:
patent: 4634242 (1987-01-01), Taguchi et al.
patent: 5148311 (1992-09-01), Beavers et al.
patent: 5446576 (1995-08-01), Lynam et al.
Patent Abstract of Japanese Reference No. 88-158890, vol. 96, No. 10, Oct. 31, 1996.
"Pt-Tio.sub.2 Thin Films On Glass Substrate As Efficient Catalysts", by M. Takahashi, Journal of Materials Science, vol. 24, No. 1, Jan. 1989 (pp. 243-246).
Komatsu Toru
Nakamura Masatoshi
Murakami Corporation
Nguyen Thong
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