Optics: measuring and testing – Document pattern analysis or verification
Patent
1988-08-02
1990-05-15
McGraw, Vincent P.
Optics: measuring and testing
Document pattern analysis or verification
354 62, G06K 920, G06K 928
Patent
active
049253000
ABSTRACT:
Apparatus suitable for imaging fingerprints directly from a finger in contact with a transparent surface of a lens is described. The conical nature of the contact surface affords the opportunity for a single such surface to accommodate a wide range of finger sizes. The front surface of the lens is conical, and a light source is provided for illuminating the finger, with ridges of the fingerprint being imaged and light illuminating the papillary valleys being refracted away from the imaging means.
REFERENCES:
patent: 2730936 (1956-01-01), Fagan et al.
patent: 2817996 (1957-12-01), Meyest
patent: 2892948 (1959-06-01), Frantz
patent: 3200701 (1965-08-01), White
patent: 3529520 (1970-09-01), Thiebault
patent: 3648240 (1972-03-01), Jacoby et al.
patent: 3906520 (1975-09-01), Phillips
patent: 3975711 (1976-08-01), McMahon
patent: 4120585 (1978-10-01), DePalma et al.
patent: 4152056 (1979-05-01), Fowler
patent: 4322163 (1982-03-01), Schiller
patent: 4428670 (1984-01-01), Ruell et al.
patent: 4537484 (1985-08-01), Fowler et al.
patent: 4544267 (1985-10-01), Schiller
patent: 4553837 (1985-11-01), Marcus
patent: 4557559 (1985-10-01), Zimring
patent: 4569080 (1986-02-01), Schiller
patent: 4581760 (1986-04-01), Schiller et al.
patent: 4792226 (1988-12-01), Fishbine et al.
Folette et al., IBM Technical Disclosure Bulletin (1974) 10(11).
LandOfFree
Optical fingerprint imaging device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical fingerprint imaging device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical fingerprint imaging device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-618282