Heated optical platen cover for a fingerprint imaging system

Details Heated optical platen cover for a fingerprint imaging system Heated optical platen cover for a fingerprint imaging system

1995-10-27

1998-10-20

Rosenberger, Richard A.

Optics: measuring and testing

Document pattern analysis or verification

382127, G06K 900

Patent

active

058254749

ABSTRACT:
The invention provides a movable cover for a finger receiving surface of an optical platen in a fingerprint imaging device. A heater incorporated into the platen cover applies controlled heat to the finger receiving surface when the cover is closed over the platen. Maintaining the finger receiving surface within a selected temperature range that is at about skin temperature helps to inhibit condensation of moisture from a subject's fingers onto the finger receiving surface.

REFERENCES:
patent: 4905293 (1990-02-01), Asai et al.
patent: 4933976 (1990-06-01), Fishbine et al.
patent: 5416573 (1995-05-01), Sartor

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