Waveguide-type image transmission device and fingerprint identif

Details Waveguide-type image transmission device and fingerprint identif Waveguide-type image transmission device and fingerprint identif

1994-02-01

1995-09-05

Lee, John D.

Optical waveguides

Integrated optical circuit

356 71, 359 2, 359 34, 382124, 385 37, 385129, G02B 612

Patent

active

054486599

ABSTRACT:
A card-shaped waveguide-type image transmission device has an image transmission base member piled up on a light illumination base member, and an optical system such as grating patterns and diffraction lens pattern for diffracting and focusing light beams are formed on the surfaces of the image transmission base member and the light illumination base member. The card-shaped waveguide-type image transmission device is integrated with an ID card, an IC card, an optical card or a ROM card as a fingerprint identification device.

REFERENCES:
patent: 3771129 (1973-11-01), McMahon
patent: 4246568 (1981-01-01), Peterson
patent: 4340300 (1982-07-01), Ruell
patent: 4400616 (1983-08-01), Chevillat et al.
patent: 4796273 (1989-01-01), Yamaguchi
patent: 4866694 (1989-09-01), Korth
patent: 4937808 (1990-06-01), Shimada et al.
patent: 5144638 (1992-09-01), Davin
patent: 5212712 (1993-05-01), Makuta
patent: 5323477 (1994-06-01), Lebby et al.

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