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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 43, Iss. 28 — Oct. 1, 2004
  • pp: 5313–5322

Efficient testing of segmented aspherical mirrors by use of a reference plate and computer-generated holograms. II. Case study, error analysis, and experimental validation

Feenix Y. Pan, Jim Burge, Dave Anderson, and Alexander Poleshchuk  »View Author Affiliations


Applied Optics, Vol. 43, Issue 28, pp. 5313-5322 (2004)
http://dx.doi.org/10.1364/AO.43.005313


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Abstract

Segmented mirrors present unique challenges to fabrication and testing that are absent for monolithic optics. Since traditional asphere tests do not address segmented optics adequately, we validate a previously developed method to test large quantities of segments accurately, quickly, and economically. In this test, the aspheric shape of each segment is controlled to high accuracy by use of computer-generated holograms, and the radius of curvature is tightly controlled by use of the reference plate. In an adjoining paper [Appl Opt 43, 5303 (2004)] we developed the theory for this test, and now we present a complete system design and optimization for measuring the 1.4-m segments from a 30-m F/1 primary. A complete tolerance analysis predicts a test accuracy of 4.8-nm rms surface and excellent accuracy for controlling the geometry of the segment. In addition, a laboratory demonstration using 30-cm optics is presented that demonstrated 3.9-nm rms surface accuracy.

© 2004 Optical Society of America

OCIS Codes
(120.3940) Instrumentation, measurement, and metrology : Metrology
(220.0220) Optical design and fabrication : Optical design and fabrication
(220.4840) Optical design and fabrication : Testing

History
Original Manuscript: August 29, 2003
Revised Manuscript: June 5, 2004
Published: October 1, 2004

Citation
Feenix Y. Pan, Jim Burge, Dave Anderson, and Alexander 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. 43, 5313-5322 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-28-5313

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