Central fringe identification using a heterodyne interferometric technique and a tunable laser-diode

Lee, Ju Yi; Chiu, Ming Horng; Su, Der Chin

doi:10.1016/0030-4018(96)00038-7

Cited by 5 publications

(1 citation statement)

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“…However, the uncertainties of these two methods are affected by the wavelength stability of the laser source. As an alternative, Lee et al [4] proposed a central fringe identification technique for identifying the central fringe of an interferogram by using heterodyne interferometry [5,6] with a tunable laser. This method can locate the zero optical path difference position accurately in a modified Michelson interferometer, and is not affected by the wavelength stability of the laser source.…”

Section: Introductionmentioning

confidence: 99%

Method for gauge block measurement with the heterodyne central fringe identification technique

Chen

Hsieh

et al. 2010

Appl. Opt.

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In a modified Michelson interferometer, the top face of the wringing platen is first identified using the heterodyne central fringe identification technique. Then the reference mirror located in the other arm is moved by a precision translation stage until the top face of the tested gauge block is also identified with the same technique. The displacement of the mirror is exactly equivalent to the length of the tested gauge block. The measurable range of the interferometer relates to the maximum travel range of the translation stage and its uncertainty depends on the uncertainty of the heterodyne central fringe identification method and the resolution of the translation stage.

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Section: Introductionmentioning

confidence: 99%