Method and apparatus for automatic scanning of fingerprints
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 15, 1988
Grant Date -
N/A
app pub date -
Dec 4, 1986
filing date -
May 2, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for automatic scanning of a fingerprint by optical scanning of the fingerprint side (2) of a finger (1) comprises a scanning surface (3) with a measuring means (5) for the rate of movement of the finger in relation to the scanning surface, and with a scanning area (4), a lighting means (6), an optical system (7,8) and an electrical/optical scanning means (9) giving an electrical signal (A) as a function of the fingerprint when the finger is moved in contact with the scanning surface (3) in the direction of the arrow. The scanning is undertaken by line scanning along the scanning line (4) in that the scanning line is imaged onto the active part of the scanning means (9). The active part consists for example of a number of substantially punctiform photodiodes (10) which are coupled in the electrical circuit and receives control signals (B) so that the photodiodes are scanned successively.
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