Topographical object detection system

Optics: measuring and testing – Document pattern analysis or verification

Patent

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G06K 924

Patent

active

059867469

ABSTRACT:
A compact system for producing high contrast and high resolution images of a topographical surface associated with an object. The system utilizes a novel holographic optical element to produce images of topographical surfaces differentiating between ridges and valleys, and providing image details of artifacts. The system of the present invention can be realized in the form of a hand-held instrument for use in in vivo imaging of fingerprint, skin tissue and the like.

REFERENCES:
patent: 4728186 (1988-03-01), Eguchi et al.
patent: 5448659 (1995-09-01), Tsutsui et al.
patent: 5621516 (1997-04-01), Shinzaki et al.

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