Browse Prior Art Database

Optical Fingerprinting

IP.com Disclosure Number: IPCOM000094856D
Original Publication Date: 1965-Jun-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Smith, DJ: AUTHOR

Abstract

A recorded fingerprint image of good resolution is obtained by pressing the finger, slightly moistened, against surface 1 of an opal glass plate 2. The image formed on the lower surface of 2 is optically transferred to a record medium.

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Optical Fingerprinting

A recorded fingerprint image of good resolution is obtained by pressing the finger, slightly moistened, against surface 1 of an opal glass plate 2. The image formed on the lower surface of 2 is optically transferred to a record medium.

Plate 2 consists of an ordinary glass composition containing a fine surface dispersion of an opacifying agent such as titanium oxide or sodium fluoride applied in a not pot process. An optical transfer comprises light source 4 which illuminates the image on 2 and lens system 3. The latter focuses the image on a precharged selenium surface 5 to form an electrostatic latent image on it in accordance with xerographic techniques.

The image on 5 is then transferred to a record medium, also in accord with xerographic techniques. The recorded fingerprint can be subsequently identified for retrieval purposes by optical recognition techniques or, if a magnetic toner is used to develop the print, can be retrieved through a magnetic reading process.

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