Device and method for obtaining a plain image of multiple finger

Details Device and method for obtaining a plain image of multiple finger Device and method for obtaining a plain image of multiple finger

1995-10-27

1997-07-22

Font, Frank G.

Optics: measuring and testing

Document pattern analysis or verification

382124, 382125, 382126, 382127, G06K 974, G06K 900

Patent

active

056508425

ABSTRACT:
A device for providing a plain image signal indicative of a plain image of surface characteristics of more than one finger on a hand includes an plain platen prism having a flat, rectangular shaped finger receiving surface having a platen aspect ratio greater than 1.33:1. An illumination source internally illuminates the finger receiving surface such that light internally illuminating a bare portion of the finger receiving surface is internally reflected from the finger receiving surface and light internally illuminating a contacted portion of the finger receiving surface in contact with the fingers is not internally reflected from the finger receiving surface. The internally reflected light forms a reflection image of the surface characteristics of the fingers. Optical elements direct the reflection image to a camera. The camera, which has a rectangular receiving surface with an aspect ratio of approximately 1.33:1, receives the reflection image and provides the plain image signal in response. The directing optical elements include refracting elements structured and arranged to change the aspect ratio of the reflection image to approximately equal the camera receiving surface aspect ratio.

REFERENCES:
patent: 3174414 (1965-03-01), Myer
patent: 3482498 (1969-12-01), Becker
patent: 3527535 (1970-09-01), Monroe
patent: 3619060 (1971-11-01), Johnson
patent: 3702731 (1972-11-01), Wood, Jr.
patent: 3947128 (1976-03-01), Weinberger et al.
patent: 3975711 (1976-08-01), McMahon
patent: 4120585 (1978-10-01), DePalma et al.
patent: 4151512 (1979-04-01), Riganati et al.
patent: 4537484 (1985-08-01), Fowler et al.
patent: 4681435 (1987-07-01), Kubota et al.
patent: 4792226 (1988-12-01), Fishbine et al.
patent: 4933976 (1990-06-01), Fishbine et al.
patent: 5067162 (1991-11-01), Driscoll, Jr. et al.
patent: 5416573 (1995-05-01), Sartor, Jr.

Affiliated with

Also associated with

Rating

Device and method for obtaining a plain image of multiple finger does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device and method for obtaining a plain image of multiple finger, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device and method for obtaining a plain image of multiple finger will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1563064