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={J. Burge and C. Zhao and M. Dubin},
  booktitle={Astronomical Telescopes + Instrumentation},
  year={2010}
}
  • J. Burge, C. Zhao, M. Dubin
  • Published in
    Astronomical Telescopes…
    2010
  • Physics, Engineering
  • 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… CONTINUE READING
    20 Citations
    Comparison of aspherical wavefront measurement by null compensator and computer-generated holograms
    Advanced surface metrology for meter-class optics
    • 7
    • PDF
    Position actuator for the ELT primary mirror
    • 1
    • PDF
    Testing and alignment of freeform-based multi-mirror telescopes
    • 2
    • Highly Influenced
    Software configurable optical test system for refractive optics
    Software configurable optical test system for refractive optics
    • 6
    Designing, fabricating, and testing freeform surfaces for space optics
    • 6
    Metrology requirements for the serial production of ELT primary mirror segments
    • P. Rees, C. Gray
    • Physics, Engineering
    • SPIE Optical Engineering + Applications
    • 2015
    • 3
    • PDF

    References

    SHOWING 1-10 OF 10 REFERENCES
    Fizeau interferometer with spherical reference and CGH correction for measuring large convex aspheres
    • 15
    • PDF
    Fabrication and testing of 1.4-m convex off-axis aspheric optical surfaces
    • 21
    • PDF
    The status of the Thirty Meter Telescope project
    • 120
    Poleshchuk, “Efficient Testing of Segmented Aspherical Mirrors by Use of a Reference Plate and Computer-Generated Holograms. II. Case Study, Error Analysis, and Experimental Validation,
    • Appl. Opt
    • 2004