1 August 1984 Stability Of A Lateral-Shearing Heterodyne Twyman-Green Interferometer
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A lateral-shearing heterodyne Twyman-Green interferometer was constructed to test lenses in transmission. The goal was to determine the repeatability of the measurement of the phase of the wavefront produced by the lens. A second interferometer was used to monitor the phase modulation used in the heterodyne scheme. The wavefront map was computed by a generalized least-squares procedure. Measured phase stabilities were better than 1 mX ( 1 m X = 10-3X, called "milliwave").
J. L. Seligson, J. L. Seligson, C. A. Callari, C. A. Callari, J. E. Greivenkamp, J. E. Greivenkamp, J. W. Ward, J. W. Ward, } "Stability Of A Lateral-Shearing Heterodyne Twyman-Green Interferometer," Optical Engineering 23(4), 234353 (1 August 1984). https://doi.org/10.1117/12.7973299 . Submission:

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