Fingerprint imaging

Details Fingerprint imaging Fingerprint imaging

A - Human Necessities

61

B

A61B 5/117 (2006.01) G02B 21/06 (2006.01) G02B 27/02 (2006.01) G02B 27/20 (2006.01) G03B 5/00 (2006.01) G06K 9/00 (2006.01)

Patent

CA 2094599

2094599 9211608 PCTABS00014 A direct fingerprint image is formed by illuminating a transparent planar substrate (22) from one surface (26) with collimated light (20), the substrate (22) having pressed against the other surface (28) a fingerprint (30) to be imaged. Light striking the surface (26) against which ridges of the fingerprint (30) are in contact undergoes total internal reflection within the substrate (22) and causes a direct image of the fingerprint to be formed by generating fluorescent light within a planar fluorescent member (38).

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