TY - JOUR
T1 - An optical angle sensor based on chromatic dispersion with a mode-locked laser source
AU - Shimizu, Yuki
AU - Madokoro, Shuhei
AU - Matsukuma, Hiraku
AU - Gao, Wei
N1 - Funding Information:
This work was supported by the Japan Society for the Promotion of Science (JSPS).
Publisher Copyright:
© 2018 The Japan Society of Mechanical Engineers.
PY - 2018
Y1 - 2018
N2 - 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.
AB - 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.
KW - Angle measurement
KW - Angular displacement
KW - Chromatic dispersion
KW - Laser autocollimation
KW - Optical frequency comb
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U2 - 10.1299/jamdsm.2018jamdsm0096
DO - 10.1299/jamdsm.2018jamdsm0096
M3 - Article
AN - SCOPUS:85055807122
VL - 12
JO - Journal of Advanced Mechanical Design, Systems and Manufacturing
JF - Journal of Advanced Mechanical Design, Systems and Manufacturing
SN - 1881-3054
IS - 5
M1 - JAMDSM0096
ER -