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Experimental Implementation of a Wiener Filter in a Hybrid Digital/Optical Correlator

journal contribution
posted on 2023-06-08, 00:20 authored by Phil BirchPhil Birch, Sovira Tan, Rupert YoungRupert Young, Triantafillos Koukoulas, Frederic Claret-Tournier, David Budgett, Chris ChatwinChris Chatwin
We present the implementation of a clutter-tolerant f filter in a hybrid correlator system. Wiener filters were mapped with a complex encoding technique onto a smectic A* liquid-crystal spatial light modulator (SLM). The technique overcomes the problem of representing high-dynamic-range data on SLM¿s that have limited modulation capabilities. It also provides a compact image recognition system that is robust enough for many real-world applications. Experimental results are presented.

History

Publication status

  • Published

Journal

Optics Letters

ISSN

0146-9592

Issue

8

Volume

26

Page range

494-496

Pages

3.0

Department affiliated with

  • Engineering and Design Publications

Notes

This paper is a first in that it was the first experimental implementation of my previously proposed pattern recognition Weiner filter which was implemented using fully complex optical modulation EPSRC-ROPA-GR/L/71230. Thus it is the first optical-hardware implementation of this filter and significantly improved the performance of hybrid-systems by allowing explicit models of background-clutter to be incorporated into the filter and so it greatly improved detection performance. This was one of the first uses of the Boulder Non-Linear Systems analogue-backplane smectic-A* liquid-crystal based spatial-light-modulator which is now a successful product. BNS-Inc, S.Serati-001-303-604-0077 used this paper to help market their SLM.

Full text available

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Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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