An Application Of Laser Interferometer

Long-Xi Wang

doi:10.1117/12.961283

3 April 1989 An Application Of Laser Interferometer

Long-Xi Wang

Proceedings Volume 1121, Interferometry '89; (1989) https://doi.org/10.1117/12.961283
Event: Interferometry '89, 1989, Warsaw, Poland

Abstract

In this paper a super high precition displacement measuring device with resolution better than 0.001um is introduced. We have improved Michelson interferometer using He-Ne laser and co-optical path with double optical beams. So high stability (<0.0015um/h), high repeatability (<0.001um) and 2A sensitivity are achieved. A reference mirror excited by a osillating source forms two trains of sinusoidal waves, after being processed electronically, a subdivision of X /800 is obtained i.e. equivalent value is 0.00079um/pulse. Through special calibrating method we find the accuracy of fringe subdivision is ±0.0025um. The instrument is used to check the accuracy of micro displacement measuring comparator of which the sensitivity is 0.01um--0.001um.

Citation Download Citation

Long-Xi Wang "An Application Of Laser Interferometer", Proc. SPIE 1121, Interferometry '89, (3 April 1989); https://doi.org/10.1117/12.961283

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