Use of an ac heterodyne lateral shear interferometer with real-time wavefront correction systems.

@article{Wyant1975UseOA,
  title={Use of an ac heterodyne lateral shear interferometer with real-time wavefront correction systems.},
  author={James C. Wyant},
  journal={Applied optics},
  year={1975},
  volume={14 11},
  pages={
          2622-6
        }
}
An analysis is performed to determine the accuracy with which an ac heterodyne lateral shear interferometer can measure wavefront aberrations if a white light extended source is used with the interferometer, and shot noise is the predominate noise source. The analysis shows that for uniform circular or square sources larger than a derived minimum size, the wavefront measurement accuracy depends only upon the radiance of the source and not upon the angular subtense of the source. For a 1-msec… CONTINUE READING

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