1 December 2004 Sinusoidal phase-modulating laser diode interferometer for measuring angular displacement
Author Affiliations +
Optical Engineering, 43(12), (2004). doi:10.1117/1.1810141
Abstract
We propose a sinusoidal phase-modulating laser diode interferometer for measuring small angular displacement. The interferometer is based on a Fabry-Perot plate. It has a simple structure and is insensitive to external disturbance. Sinusoidal phase-modulating interferometry is used for improving the measurement accuracy. A charge-coupled device (CCD) image sensor is used for measuring the distance between the reflected beams from two faces of the Fabry-Perot plate. From the distance, the initial angle of incidence is calculated. Compared with Michelson interferometers and autocollimators, this interferometer has the advantage of compact size and simple structure. The numerical calculation and experimental results verify the usefulness of this novel interferometer.
Caini Zhang, Xiangzhao Wang, "Sinusoidal phase-modulating laser diode interferometer for measuring angular displacement," Optical Engineering 43(12), (1 December 2004). http://dx.doi.org/10.1117/1.1810141
JOURNAL ARTICLE
6 PAGES


SHARE
KEYWORDS
Interferometers

Phase interferometry

Semiconductor lasers

CCD image sensors

Charge-coupled devices

Signal detection

Interferometry

Back to Top