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Proceedings Paper

All-optical extended focus imaging system
Author(s): Eyal Ben Eliezer; Zeev Zalevsky; Emanuel Marom; Naim Konforti
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Paper Abstract

A lens in conjunction with a multiplexed set of Fresnel lenses (FL) can significantly reduce the sensitivity of an optical system to defocus aberrations. Each FL is considered as a corrective lens with a slightly different focal length. Thus for a fixed detector plane, there is a set of object planes for which the composite lens provides perfect imaging. The various FLs are multiplexed using code division multiple access procedure. The resulting image is analyzed in this paper. One obtains a significant improvement of depth of field, albeit coupled with a reduction of resolution and image contrast.

Paper Details

Date Published: 19 November 2003
PDF: 2 pages
Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); doi: 10.1117/12.523808
Show Author Affiliations
Eyal Ben Eliezer, Tel Aviv Univ. (Israel)
Zeev Zalevsky, Tel Aviv Univ. (Israel)
Emanuel Marom, Tel Aviv Univ. (Israel)
Naim Konforti, Tel Aviv Univ. (Israel)


Published in SPIE Proceedings Vol. 4829:
19th Congress of the International Commission for Optics: Optics for the Quality of Life
Giancarlo C. Righini; Anna Consortini, Editor(s)

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