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US 2003/0142375 A1Published application
Optical reading document board and optical reader
AssigneeSony Corporation
InventorsYoshihiro Oshima, Hideaki Tomotsu
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AssigneeSony Corporation
InventorsYoshihiro Oshima, Hideaki Tomotsu
Estimating the term…
In an optical-reading document board of the invention, an anti-reflection film formed by a transparent film and an anti-reflection film is bonded on a document-resting surface of a transparent glass plate. The anti-reflection film is structured by a transparent film and an anti-reflection film bonded on one surface of the transparent film. The use of such an anti-reflection film greatly improves reflectivity to provide an averaged reflectivity of approximately 3% in the entirety. As a result, the transmissivity of light is 94% or greater. In connection with this, the conventional has a reflectivity of approximately 8%, and a transmissivity thereof is around 90%. This makes it possible to effectively utilize the light of from the light source, thus greatly improve contrast.
An optical-reading document board comprising an anti-reflection film formed by a transparent film and an anti-reflection film and bonded on a document-resting surface of a transparent glass film.
An optical reader comprising:
An optical-reading document board comprising:
An optical reader comprising:
Dependencies are inferred from the claim text.