Fingerprint image input apparatus and method of producing the sa

Details Fingerprint image input apparatus and method of producing the sa Fingerprint image input apparatus and method of producing the sa

1996-08-05

1998-01-13

Font, Frank G.

Optics: measuring and testing

Document pattern analysis or verification

250556, 340146, G06K 974

Patent

active

057084971

ABSTRACT:
The fingerprint image input apparatus includes two-dimensional image sensor 14 formed on transparent substrate 21 and including diffraction grating 41, photo-sensitive elements 24, switch elements 22, switching lines 25, signal reading lines 26, bias applying lines 27, and light interception plates 23 disposed below photo-sensitive elements 24, planar light source 11 and transparent protective film 42. Diffraction grating 41 is formed on two-dimensional image sensor 14 together with photo-sensitive elements 24 commonly using one or more opaque materials of photo-sensitive elements 24.

REFERENCES:
patent: 4206441 (1980-06-01), Kondo
patent: 4358677 (1982-11-01), Ruell et al.
patent: 5446290 (1995-08-01), Fujieda et al.

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