Image analysis – Applications – Personnel identification
Patent
1995-02-27
1999-10-26
Couso, Jose L.
Image analysis
Applications
Personnel identification
382125, 382126, 382127, 356 71, G06K 900
Patent
active
059741627
ABSTRACT:
A method and ultra-compact system has been developed for illuminating and detecting the surface topography of an object such as the finger of an individual. The system is capable of producing high-contrast images which can be electronically transmitted in real-time, or stored using electronic or photographic recording devices. Light traveling within a light transmitting substrate is redirected by a slanted-fringe light diffractive grating preferably embodied within a volume hologram. The volume hologram, either of the reflection or transmission type, is attached to the light transmitting substrate, and functions to diffract light striking thereupon and illuminate an object having topographical surface structure. After being spatially and intensity modulated in accordance with topographical details of the illuminated object, the modulated light passes back through the light transmitting substrate and the volume hologram, onto an image detection array, for subsequent analysis. Each of the disclosed embodiments has a compact geometry suitable for use in diverse object identification applications.
REFERENCES:
patent: 3174414 (1965-03-01), Myer
patent: 4340300 (1982-07-01), Ruell
patent: 4728186 (1988-03-01), Eguchi et al.
patent: 4905293 (1990-02-01), Asai et al.
patent: 4924085 (1990-05-01), Kato et al.
patent: 5077803 (1991-12-01), Kato et al.
patent: 5088817 (1992-02-01), Igaki et al.
patent: 5109427 (1992-04-01), Yang
patent: 5177802 (1993-01-01), Fujimoto
patent: 5241606 (1993-08-01), Horie
patent: 5448659 (1995-09-01), Tsutsui et al.
patent: 5455693 (1995-10-01), Wreede et al.
Planar-Optic-Disk Pickup with Diffractive Micro-Optics, written by Teruhiro Shiono and Hisahito Ogawa, published by Applied Optics, vol. 33, No. 31, Nov. 1, 1994, 6 pages.
Magic Finger.TM., brochure, distributed by Information Spectrum, Inc., 2 pages.
FingerCheck FC100, press release published by Startek Engineering, Inc., Taiwan, 7 pages, Apr. 1994.
TouchPrint.TM., brochure published by Identix, Inc., 1993, 2 pages.
The Direct Fingerprint Reader " . . . The Better Way to Capture the Highest-Quality Finger Images `Live` for Identification Purposes" by Indenticator Technology, 1993, 3 pages.
Holographic Fingerprint Sensor, written by Shin Eguchi, Seigo Igaki, Fumio Yamagishi, Hiroyuki Ikeda, and Takefumi Inagaki , published by Practical Holography III, SPIE vol. 1051, 1989, 7 pages.
Real-Time Fingerprint Sensor Using a Hologram, written by Seigo Igaki, Shin Eguchi, Fumio Yamagishi, Hiroyuki Ikeda, and Takefumi Inagaki, published by Applied Optics, vol. 31, No. 11, Apr. 10, 1992, 9 pages.
Coleman Zane
Flatow Carl
Metz Michael
Phillips Nicholas J.
Couso Jose L.
Do Anh Hong
Imedge Technology, Inc.
LandOfFree
Device for forming and detecting fingerprint images with valley 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 for forming and detecting fingerprint images with valley , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for forming and detecting fingerprint images with valley will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-772776