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Titolo:
Simultaneous measurement of velocity and length of moving surfaces by a speckle velocimeter with two self-mixing laser diodes
Autore:
Ozdemir, SK; Takasu, T; Shinohara, S; Yoshida, H; Sumi, M;
Indirizzi:
Shizuoka Univ, Hamamatsu, Shizuoka 4328561, Japan Shizuoka Univ HamamatsuShizuoka Japan 4328561 u, Shizuoka 4328561, Japan Chiba Inst Technol, Narashino, Chiba 2750016, Japan Chiba Inst Technol Narashino Chiba Japan 2750016 no, Chiba 2750016, Japan
Titolo Testata:
APPLIED OPTICS
fascicolo: 10, volume: 38, anno: 1999,
pagine: 1968 - 1974
SICI:
0003-6935(19990401)38:10<1968:SMOVAL>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
COMPACT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
--discip_EC--
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Ozdemir, SK Shizuoka Univ, Hamamatsu, Shizuoka 4328561, Japan Shizuoka Univ Hamamatsu Shizuoka Japan 4328561 4328561, Japan
Citazione:
S.K. Ozdemir et al., "Simultaneous measurement of velocity and length of moving surfaces by a speckle velocimeter with two self-mixing laser diodes", APPL OPTICS, 38(10), 1999, pp. 1968-1974

Abstract

A novel laser speckle velocimeter with two self-mixing laser diodes (SM-LD's) for velocity and length measurements of moving surfaces is reported. The mean frequency of the speckle signal obtained in the measurement system depends on the surface path illuminated by the SM-LD. This behavior of the speckle signal in the SM-LD's is exploited to detect the front and the end edges of a target surface by sampling continuously the number of intensity changes in a speckle signal waveform. Once the edges are determined, the velocity and the length of the surface are calculated easily. The error for length and velocity measurements of a target with a homogeneous rough plane surface of 60-mm length, moving at a velocity of 200 mm/s, can be as low as 2.1% and 1.75%, respectively. (C) 1999 Optical Society of America.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/08/20 alle ore 21:13:49