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Proceedings Paper

Nonlinear phase contrast using a bacteriorhodopsin film
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Paper Abstract

In this paper we demonstrate a novel phase contrast system that employs a BR film. Since the filter is optically induced by the Fourier transform of the phase object, no alignment is necessary at the filter plane making it extremely robust. Due to the optical properties of BR films the phase filter can be induced with low light intensity levels. The material response allows operation at video frame rates, processing of high spatial resolution objects, and the use of relatively inexpensive laser sources. Such characteristics and the fact that BR films can be produced at a low cost makes the system simple to implement, relatively inexpensive and extremely robust. The effects of varying the illuminating area beyond the phase object area and filter saturation are also analyzed.

Paper Details

Date Published: 27 November 2002
PDF: 10 pages
Proc. SPIE 4789, Algorithms and Systems for Optical Information Processing VI, (27 November 2002); doi: 10.1117/12.456519
Show Author Affiliations
Marcelo David Iturbe Castillo, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)
J. David Sanchez-de-la-Llave, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)
Ruben Ramos Garcia, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)
Eduardo Tepichin-Rodriguez, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)
L. I. Olivos-Perez, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)


Published in SPIE Proceedings Vol. 4789:
Algorithms and Systems for Optical Information Processing VI
Bahram Javidi; Demetri Psaltis, Editor(s)

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