INFORMATION INPUT ASSISTANCE SHEET
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United States of America Patent
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Jan 5, 2015
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Dec 27, 2013
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Abstract
The objective of the invention is to provide an information input assistance sheet that can accurately read infrared reflection light from an ultra minute area regardless of the contact angle of the optical reading device when the optical reading device reads a dot pattern by causing infrared light emitted from the light source of the optical reading device to be reflected off the information input assistance sheet printed with dots that absorb infrared light. The dots of the dot pattern are printed with an ink that has a characteristic that absorbs at least a predetermined wavelength light or the characteristic that absorbs the predetermined wavelength light and a visible light transmission characteristic, and the diffuse reflection layer is formed by arranging a directional reflection material so that the predetermined wavelength light that is irradiated by the irradiation means is diffusely reflected toward the dot pattern reading surface.
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