Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Simultaneous measurement of velocity and length of moving surfaces by a speckle velocimeter with two self-mixing laser diodes

Not Accessible

Your library or personal account may give you access

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.

© 1999 Optical Society of America

Full Article  |  PDF Article
More Like This
Correlation-based speckle velocimeter with self-mixing interference in a semiconductor laser diode

Şahin Kaya Özdemir, Satoshi Ito, Shigenobu Shinohara, Hirofumi Yoshida, and Masao Sumi
Appl. Opt. 38(33) 6859-6865 (1999)

Laser Doppler velocimeter for velocity and length measurements of moving surfaces

Bruce E. Truax, Frank C. Demarest, and Gary E. Sommargren
Appl. Opt. 23(1) 67-73 (1984)

Simultaneous measurement of the velocity and the displacement of the moving rough surface by a laser Doppler velocimeter

K. Matsubara, W. Stork, A. Wagner, J. Drescher, and K. D. Müller-Glaser
Appl. Opt. 36(19) 4516-4520 (1997)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (13)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved