Measurement of aspheric mirror segments using Fizeau interferometry with CGH correction

@inproceedings{Burge2010MeasurementOA,
  title={Measurement of aspheric mirror segments using Fizeau interferometry with CGH correction},
  author={James H. Burge and Chunyu Zhao and Matthew B. Dubin},
  booktitle={Astronomical Telescopes + Instrumentation},
  year={2010}
}
Large aspheric primary mirrors are proposed that use hundreds segments that all must be aligned and phased to approximate the desired continuous mirror. We present a method of measuring these concave segments with a Fizeau interferometer where a spherical convex reference surface is held a few millimeters from the aspheric segment. The aspheric shape is accommodated by a small computer generated hologram (CGH). Different segments are measured by replacing the CGH. As a Fizeau test, nearly all… 

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