Laser diode interferometer used for meas
Laser diode interferometer used for measuring displacements in large range with a nanometer accuracy
โ
Xuefeng Wang; Xiangzhao Wang; Hongbin Lu; Feng Qian; Yang Bu
๐
Article
๐
2001
๐
Elsevier Science
๐
English
โ 130 KB
In this paper, the displacement of an object is measured with a photothermal phase-modulating laser diode interferometer. A feedback control system is designed to reduce the measurement errors caused by the uctuations in the optical wavelength of the laser diode and the vibrations of the optical com