Journal
OPTICS LETTERS
Volume 27, Issue 7, Pages 503-505Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.27.000503
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A dual-wavelength parallel interferometer for subnanometer displacement measurement is introduced. A synthetic wavelength is used to subdivide the fringes formed by a single wavelength. An experimental setup that uses a heat-stabilizing dual-wavelength 633-nm He-Ne laser as the light source is established. The primary experimental result shows that a resolution of 0.210 nm over a 350-nm range has been achieved. (C) 2002 Optical Society of America.
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