CONTRAST AND SENSITIVITY OF THE VIBRATION FRINGES IN TIME-AVERAGED ELECTRONIC SPECKLE-PATTERN INTERFEROMETRY - EFFECT OF VARIATIONS OF FORCE LEVEL

Authors
WONG WO CHAN KT LEUNG TP
Citation
Wo. Wong et al., CONTRAST AND SENSITIVITY OF THE VIBRATION FRINGES IN TIME-AVERAGED ELECTRONIC SPECKLE-PATTERN INTERFEROMETRY - EFFECT OF VARIATIONS OF FORCE LEVEL, Optics and Laser Technology, 29(4), 1997, pp. 179-185
Citations number
15
Categorie Soggetti
Optics,"Physics, Applied
Journal title
Optics and Laser Technology → ACNP
ISSN journal
00303992
Volume
29
Issue
4
Year of publication
1997
Pages
179 - 185
Database
ISI
SICI code
0030-3992(1997)29:4<179:CASOTV>2.0.ZU;2-D
Abstract
The time averaged frame subtraction technique is improved by subtracti ng two Bessel fringe patterns at two different force levels. The techn ique enables significant enhancement of fringe contrast and increased measurement sensitivity. The contrast and sensitivity of the fringes o btained at different force ratios are investigated, Both theoretical a nd experimental results are presented. (C) 1997 Elsevier Science Ltd.