Optical sensor and regonization unit
An optical sensor and light-receiving part technology, applied in the field of optical sensors, can solve the problems of reduced light quantity, no optical filter, and reduced detection accuracy of fluorescent light-emitting patterns, etc., to achieve the effect of suppressing contamination and ensuring recognition accuracy
Inactive Publication Date: 2013-01-02
HITACHI OMRON TERMINAL SOLUTIONS CORP
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Problems solved by technology
[0010] Therefore, in the configuration proposed in Patent Document 1, there is a problem that the amount of light received by the light receiving part for detecting the fluorescent light emitting pattern of the paper sheet decreases due to the contamination of the optical filter, and the detection accuracy of the fluorescent light emitting pattern decreases.
[0011] In addition, in Patent Document 2, as described above, since the fluorescence emission pattern of paper sheets is not detected, no optical filter is arranged in front of the light receiving unit.
Method used
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Embodiment Construction
[0046] Embodiments of the present invention will be described below.
[0047] Here, an automatic teller machine (hereinafter referred to as ATM) using the identification unit according to the above embodiment of the present invention will be described as an example. And, the optical sensor according to the embodiment of the present invention is used for this recognition unit.
[0048] figure 1 It is a schematic diagram showing the appearance of the ATM, figure 2 It is a block diagram showing the configuration of the main part of the ATM. ATM 1 is installed in stores of financial institutions, convenience stores, and the like. The ATM 1 processes various transactions such as a deposit transaction and a withdrawal transaction in accordance with a user's input operation. ATM1 is provided with the main control part 2, the display operation part 3, the banknote processing part 4, the coin processing part 5, the card and statement processing part 6, the passbook processing part...
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The present invention provides an optical sensor and a recognizing unit, which restrains detection precision reduction of a fluorescent light-emitting pattern that is caused by muddiness of an optical wave filter that is provided in front of a light receiving part for detecting the fluorescent light emitting pattern of the paper. A paper money recognizing unit (20) is characterized in that: a detection part (24) causes a second light emitter (22B) of a light emitting part (22) to emit light and irradiates the light with a second wavelength (S11). A detection part (24) regulates the power supplied to the second light emitter (22B) and detects the powers (P1) which are output from a light receiving part (23) and becomes the reference value stored by a storage part (26) (S12). The detection part (24) calculates a supply power (P2) to a correction value based on the power (P1) detected in (S12) and a related function (F) that is stored in the storage part (26) when the light emitting amount of a first light emitter (22A) becomes the light emitting amount which is suitable for fluorescent light emitting pattern detection (S13). The paper money recognizing unit (20) controls the power that is supplied to the first light emitter (22A) based on the correction value stored in the storage part (26).
Description
technical field [0001] The present invention relates to an optical sensor that detects a fluorescent light emission pattern of a fluorescent substance included in paper sheets, and an identification unit that uses the optical sensor to determine the authenticity of a detected fluorescent pattern. Background technique [0002] Conventionally, there are automatic machines that process paper sheets such as banknotes, checks, and securities. Such an automatic machine includes an identification unit for identifying authenticity of paper sheets to be handled. As such an automatic machine, there are, for example, cash automatic teller machines (hereinafter referred to as ATMs) installed in stores by financial institutions such as banks. [0003] Banknotes are printed with anti-counterfeiting patterns using ink (ink containing fluorescent substances) that emits light (hereinafter referred to as fluorescence) when irradiated with light of a specific wavelength (hereinafter referred ...
Claims
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IPC IPC(8): G07D7/12G07D7/206
Inventor 西泽由佳麦健忠
Owner HITACHI OMRON TERMINAL SOLUTIONS CORP