UNIDIRECTIONAL LASER OBLIQUE ILLUMINATION (ULOI) - A COMPARISON WITH PARTIAL DARK-FIELD ILLUMINATION (PDFI) IN THE OPTICAL MICROSCOPY OF METALS

Authors
POVOLO F CANZIAN A FAVRET E
Citation
F. Povolo et al., UNIDIRECTIONAL LASER OBLIQUE ILLUMINATION (ULOI) - A COMPARISON WITH PARTIAL DARK-FIELD ILLUMINATION (PDFI) IN THE OPTICAL MICROSCOPY OF METALS, Optics and Laser Technology, 29(2), 1997, pp. 67-73
Citations number
10
Categorie Soggetti
Optics,"Physics, Applied
Journal title
Optics and Laser Technology → ACNP
ISSN journal
00303992
Volume
29
Issue
2
Year of publication
1997
Pages
67 - 73
Database
ISI
SICI code
0030-3992(1997)29:2<67:ULOI(->2.0.ZU;2-W
Abstract
Some metallographic observations of the surface of polycrystalline spe cimens in an optical microscope illuminated with a HeNe laser beam, at oblique incidence, are compared with observations with white light al so at oblique incidence. It is shown that similar effects are obtained in both cases; however, the width of the maximum in the dispersed int ensity is narrower in the case of illumination with the laser beam, In addition, this kind of illumination permits us to distinguish distinc t angular directions of the surface roughness. (C) 1997 Elsevier Scien ce Ltd.