@article{oai:niigata-u.repo.nii.ac.jp:00001542, author = {Sasaki, Osami and Sasazaki, Hiroyuki and Suzuki, Takamasa}, issue = {28}, journal = {Applied Optics, Applied Optics}, month = {Oct}, note = {We describe a two-wavelength laser-diode interferometer that is insensitive to external disturbances such as fluctuations in the wavelength of the laser diode and mechanical vibrations of the optical components. In sinusoidal phase-modulating interferometry this insensitivity is easily obtained by controlling the injection current of the laser diode with a feedback control system. Using an equivalent wavelength of 152 microm provided by two single-frequency laser diodes, we can measure the distance, rotation angle, and surface profile measurements with great accuracy.}, pages = {4040--4045}, title = {Two-wavelength sinusoidal phase/modulating laser-diode interferometer insensitive to external disturbances}, volume = {30}, year = {1991} }