Optical identification card system
First Claim
1. An optical card identification system provided with individual cards which have an individual code said cards having means for receiving a request signal from a location remote from said cards requesting a return signal together with means including a power supply for generating and irradiating infrared light modulated by the said individual codes of respective cards in response to said requesting signal while said cards are in transit through a prescribed zone spaced from said source, said system further including a detector which irradiates the said request signal as infrared light from said remote location into said prescribed area and has means for receiving said infrared light transmitted from said individual cards, and thereby detecting the individual code of the latter said cards, and an identifier which identifies the detected individual codes, together with means operative on the basis of the identification results, for actuating terminal equipment related to holders of the said individual cards.
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Accused Products
Abstract
The present invention concerning the Optical Identification Card System is provided with an individual card which emits infrared light modulated by the individual code and a detector which receives this infrared modulated light and detects the individual code. When a request signal is radiated from this detector as infrared light from the above within the prescribed light-emitting area, the said infrared modulated light is radiated from the individual card within the light-emitting area and thus the individual code is detected by the detector. Then the detected individual code is identified by the identifier, and on the basis of this identification result, the terminal equipment related to the holder of the individual card is actuated, thereby automatically locking and unlocking the door.
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Citations
11 Claims
- 1. An optical card identification system provided with individual cards which have an individual code said cards having means for receiving a request signal from a location remote from said cards requesting a return signal together with means including a power supply for generating and irradiating infrared light modulated by the said individual codes of respective cards in response to said requesting signal while said cards are in transit through a prescribed zone spaced from said source, said system further including a detector which irradiates the said request signal as infrared light from said remote location into said prescribed area and has means for receiving said infrared light transmitted from said individual cards, and thereby detecting the individual code of the latter said cards, and an identifier which identifies the detected individual codes, together with means operative on the basis of the identification results, for actuating terminal equipment related to holders of the said individual cards.
Specification