Commercialization of alignment of an optical correlator:  architectures and alignment procedures

Damon P. Manettas; Mark L'Antigua; Michael A. Fiddy

doi:10.1117/12.141946

23 March 1993 Commercialization of alignment of an optical correlator: architectures and alignment procedures

Damon P. Manettas, Mark L'Antigua, Michael A. Fiddy

Proceedings Volume 1822, Optics, Illumination, and Image Sensing for Machine Vision VII; (1993) https://doi.org/10.1117/12.141946
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

Abstract

In this paper we describe the basic characteristics of an optical correlator and draw attention to the specific joint transform design currently being marked by SORL. This system incorporates liquid crystal TVs as input devices providing a high degree of feature discrimination. We address two issues here: The first is a detailed explanation of an alignment procedure which can be used with most correlators. The wavefront errors introduced from the correlator's components are also measured using interferometric techniques. This is an important step in the setup for any correlator in order to provide high quality Fourier information. The second issue is how to maintain performance while reducing the size of the correlator architecture. A discussion of compact correlators is given and two new designs are described. To work effectively, these architectures require that careful attention be paid to the initial alignment and set-up procedures described here.

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Damon P. Manettas, Mark L'Antigua, and Michael A. Fiddy "Commercialization of alignment of an optical correlator: architectures and alignment procedures", Proc. SPIE 1822, Optics, Illumination, and Image Sensing for Machine Vision VII, (23 March 1993); https://doi.org/10.1117/12.141946

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KEYWORDS

Optical correlators

Wavefronts

Fourier transforms

Joint transforms

Charge-coupled devices

Spatial light modulators

Alignment procedures

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