Full roll fingerprint apparatus
First Claim
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1. In an optical scan fingerprint apparatus having an interrogating light beam that illuminates a finger object on a platen to provide a reflected modulated light beam having finger surface information that can be focused to provide a fingerprint image, the improvement to provide a full roll fingerprint image comprising:
- a plurality of sensory indicia,synchronizing means to change the state of said indicia as a function of the position of the optical scan,whereby a finger that is rolled on said platen in track with the changing state of said indicia will track with the scan.
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Abstract
As a live finger is rolled across a glass platen in an optical scan fingerprint apparatus, a series of lights turn on and off to demarcate the line along the platen at which the optical scan is being taken. In this fashion, the finger applied to the platen can be rotated across the platen at a rate that keeps sufficient track with the scan to provide a complete (nail-to-nail) full roll scan.
91 Citations
8 Claims
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1. In an optical scan fingerprint apparatus having an interrogating light beam that illuminates a finger object on a platen to provide a reflected modulated light beam having finger surface information that can be focused to provide a fingerprint image, the improvement to provide a full roll fingerprint image comprising:
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a plurality of sensory indicia, synchronizing means to change the state of said indicia as a function of the position of the optical scan, whereby a finger that is rolled on said platen in track with the changing state of said indicia will track with the scan. - View Dependent Claims (2, 3, 4)
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5. In the method of optically scanning a finger object to provide a modulated light beam having finger surface information that can be focused as a fingerprint image, the improvement to provide a full roll fingerprint image comprising the steps of:
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positioning the finger on the platen, rolling the finger to a first end position in which a first nail edge end of the full roll fingerprint is applied to the platen, initiating the optical scan, sequentially changing the state of each of a plurality of sensory indicia in synchronization with the optical scan, rolling the finger on the platen to a second nail edge end position, said step of rolling the finger over said platen between one nail edge end position to the other nail edge end position being taken in track with the change of state of said sensory indicia. - View Dependent Claims (6, 7, 8)
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Specification