We propose a new range finding technique that uses two-wavelength interferometry. The system we propose uses a single laser diode to realize a two-wavelength interferometer, which expands measurement range. The single light-source allows us to simplify the optical setup. Our device generates two independent interference signals with respect to the wavelengths generated by offset current. The external disturbances on these interference signals are eliminated by the feedback control. Although the feedback control eliminates disturbance as well as the information about the distance, we are able to detect the distance from the phase difference between those compensated interference signals.
内容記述
Advanced materials and devices for sensing and imaging : 17-18 October 2002, Shanghai, China. : Oct 2002, Shanghai, China
雑誌名
Proceedings of SPIE - the International Society for Optical Engineering
巻
4919
ページ
339 - 346
発行年
2002-10
出版者
International Society for Optical Engineering, SPIE
ISSN
0277786X
書誌レコードID
AA10619755
DOI
info:doi/10.1117/12.465657
権利
Copyright 2002 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Absolute distance measurement with a sampling type of double sinusoidal phase-modulating laser diode interferometer
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