Optical sensing device for detecting optical features of valuable papers

Abstract

An optical sensing device for detecting plural optical features of valuable papers is provided that comprises first and second photocoupers 5 and 6 or 9 and 10 positioned in the vicinity of and on the opposite sides of a passageway 13 for guiding the valuable paper 64. Each of first and second photocouplers 5 and 6 or 9 and 10 has a light emitting element 20, 22, 30, 32 for emitting a light, and a light receiving element 21, 23, 31, 33 for selectively receiving the light from the light emitting element 20 so that each light receiving element 21, 23, 31, 33 can receive lights reflected on and penetrating the valuable paper 64 for detection of multiple optical features from the valuable paper 64. Thus, the optical sensing device can derive plural optical scanning patterns by means of less number of light emitting and receiving elements to improve accuracy in valuable paper validation; can pick out optical patterns for different colors printed on valuable paper by means of plural lights of different wavelength irradiated on a same scan line or area on valuable paper; and can utilize inexpensive light emitting and receiving elements to reduce cost for manufacture.

Description

[0001] This application is a divisional application of the Chinese patent application 200380109261.7 (PCT / JP2003 / 017006) with the filing date of December 26, 2003 and titled "Optical Detection Device for Detecting Optical Features of Valuable Securities". technical field [0002] The present invention relates to an optical detection device for detecting multiple optical characteristics of a document of value, such as a document, by means of multiple light beams reflected or transmitted from the document of value to improve the authentication performance of the document of value. Background technique [0003] For example, Japanese Patent Disclosure No. 62-111376 discloses a system for verifying documents by an optical method, which radiates visible light and infrared rays simultaneously by means of a single light-emitting element in which there are two light-emitting diode chips to reduce the amount of light used in prior art systems. The number of light-emitting elements can ...

AI Technical Summary

Problems solved by technology

[0005] However, in some cases, the authenticator cannot accurately verify the document because not enough different optical features are extracted from the document

Furthermore, since conventional photosensors utilize photocouplers combining light-emitting and receiving elements, the increased number of photosensors to increase verification accuracy occupies a large area in the discriminator, resulting in a larger-sized sensor structure and obstructing optical Scan the target area on the ticket

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