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Titolo:
Adaptive spatial filtering using photochromic glass
Autore:
Potton, RJ;
Indirizzi:
Univ Salford, Sch Sci, Joule Phys Lab, Salford M5 4WT, Lancs, England UnivSalford Salford Lancs England M5 4WT Salford M5 4WT, Lancs, England
Titolo Testata:
MEASUREMENT SCIENCE & TECHNOLOGY
fascicolo: 12, volume: 10, anno: 1999,
pagine: 1315 - 1318
SICI:
0957-0233(199912)10:12<1315:ASFUPG>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Keywords:
bending sensor; optical fibre interferometer; spatial filter; photochrome; adaptive; drift nulling;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
6
Recensione:
Indirizzi per estratti:
Indirizzo: Potton, RJ Univ Salford, Sch Sci, Joule Phys Lab, Salford M5 4WT, Lancs, England Univ Salford Salford Lancs England M5 4WT 4WT, Lancs, England
Citazione:
R.J. Potton, "Adaptive spatial filtering using photochromic glass", MEAS SCI T, 10(12), 1999, pp. 1315-1318

Abstract

Commercially available photochromic glasses exhibit a wide range of spectral sensitivities and darkening response times. Short wavelengths are more effective than long ones for causing darkening but at least one type of glass is effectively darkened by red light (lambda = 633 nm) with an intensity of about 1 kW m(-2). Used as adaptive spatial filters, these glasses attenuate a wavefront by an amount that depends on their recent exposure to light. One type of optical processing that can be performed with such filters isdrift nulling in an interferometer excited by light of a wavelength withinthe sensitivity spectrum of the photochrome. This form of processing has been demonstrated by dithering the speckle pattern in a single-fibre multimode interferometer. The dither allows phase-sensitive detection techniques to be used in the detection of signal-induced phase variations in a frequency band extending from the inverse response time of the photochrome to the dither frequency.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 12:28:01