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Multispectral size-averaged incoherent spatial filtering.

Authors
Type
Published Article
Journal
Applied optics
Publication Date
Volume
18
Issue
23
Pages
4025–4029
Identifiers
DOI: 10.1364/AO.18.004025
PMID: 20216747
Source
Medline

Abstract

A method of 2-D size-averaged incoherent recognition filtering is described. White light input illumination is used to multiplex chromatically a continuum of inputs differing in their spatial Fourier spectral magnifications. A two-grating dichromated-gelatin lateral-dispersion compensating device is inserted to correct chromatic dispersion introduced by a computer-generated hologram filter. The resulting registered recognition patterns are added to form a single effective filter size-averaged recognition peak. Using high efficiency compensating gratings and a bleached binary hologram allow the use of a relatively low-power light source.

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