04876725 is referenced by 40 patents and cites 15 patents.

The invention relates to an optical processing fingerprint verification device. A light source illuminates a prism upon which the user has placed two fingers to that light reflected from the prism is modulated by the data of the users fingerprints. The fingerprint data beam passes through a lens and undergoes a Fourier transform at a card including a reflection hologram matched to two fingerprints of a reference individual. The intensity distribution of the ligh reflected from the hologram determines whether a match exists. Use of a reflection hologram allows use of an incoherent light source. The two fingers are located on the prism by movable guides positioned by information on the card as to the relative length and the width of the two fingers of the reference individual. This provides a second level of verification. Scaling sensitivity may be reduced by utilizing a frequency multiplexed hologram.

Title
Method and apparatus for fingerprint verification
Application Number
7/105615
Publication Number
4876725
Application Date
October 8, 1987
Publication Date
October 24, 1989
Inventor
George J Tomko
Toronto
CA
Agent
Ronald D Faggetter
Assignee
Mytec Technologies
CA
IPC
G06K 9/00
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