Journal of Advanced Mechanical Design, Systems, and Manufacturing
Online ISSN : 1881-3054
ISSN-L : 1881-3054
Papers(Special Issue)
An optical angle sensor based on chromatic dispersion with a mode-locked laser source
Yuki SHIMIZUShuhei MADOKOROHiraku MATSUKUMAWei GAO
Author information
JOURNAL FREE ACCESS

2018 Volume 12 Issue 5 Pages JAMDSM0096

Details
Abstract

This paper proposes a new optical angle sensor, in which a mode-locked laser is employed as the light source, and chromatic dispersion of a collimator objective is utilized to detect the angular displacement of a target of interest. In the proposed method, each of the optical modes in the femtosecond laser beam reflected from the reflector mounted on a target of interest is separated from the others by chromatic dispersion of a collimator objective to generate a group of focused laser beams that can be utilized as the scale for measurement of an angular displacement of the target. By detecting the change in peak frequency in optical spectra obtained by the photodetector, a small angular displacement can be measured. In this paper, as the first step of research, a prototype optical setup is developed, and some basic experiments are carried out to demonstrate the feasibility of the proposed method for measurement of angular displacement.

Content from these authors
© 2018 by The Japan Society of Mechanical Engineers
Previous article Next article
feedback
Top