Method for producing correct fingerprints

Rao, Madhusudana S (2008) Method for producing correct fingerprints. In: Applied Optics, 47 (1). pp. 25-29.

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Abstract

The conventional method of producing fingerprints by total internal reflection using a right-angle prism does not give true size images. In this case an anamorphic real image is formed by the Scheimpflug condition with keystone distortion. A method of combining a single prism with the right-angle prism for anamorphic stretching to get the correct fingerprint image is described. The method of constructing such a type of an optical system is discussed in detail. The method is useful to directly obtain the correct fingerprints using a CCD camera.

Item Type:	Journal Article
Publication:	Applied Optics
Publisher:	Optical Society of America
Additional Information:	Copyright of this article belongs to Optical Society of America.
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	05 Mar 2008
Last Modified:	19 Sep 2010 04:43
URI:	http://eprints.iisc.ac.in/id/eprint/13305

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