Compact optical instrument for surface classification using self-mixing interference in a laser diode

Citation
Sk. Ozdemir et al., Compact optical instrument for surface classification using self-mixing interference in a laser diode, OPT ENG, 40(1), 2001, pp. 38-43
Citations number
17
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
OPTICAL ENGINEERING
ISSN journal
00913286 → ACNP
Volume
40
Issue
1
Year of publication
2001
Pages
38 - 43
Database
ISI
SICI code
0091-3286(200101)40:1<38:COIFSC>2.0.ZU;2-G
Abstract
A compact and noncontact sensor using the self-mixing interference inside a semiconductor laser is designed to classify moving surfaces. An artificial neural network is employed for the data processing. The results indicate m ore than 92% correct classification for eight different surfaces of differe nt materials, different manufacturing methods and different surface roughne sses. The accuracy of the system is restricted by the localized irregularit ies on the surface and the mechanical instabilities of the carrying stage o ver which the surfaces are placed. (C) 2001 Society of Photo-Optical Instru mentation Engineers.