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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 31, Iss. 34 — Dec. 1, 1992
  • pp: 7191–7197

Optical metrology for two large highly aspheric telescope mirrors

S. C. West, J. H. Burge, R. S. Young, D. S. Anderson, C. Murgiuc, D. A. Ketelsen, and H. M. Martin  »View Author Affiliations


Applied Optics, Vol. 31, Issue 34, pp. 7191-7197 (1992)
http://dx.doi.org/10.1364/AO.31.007191


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Abstract

We describe a relatively simple, but highly effective, approach to the system design and alignment of an all-refractive Offner null corrector and phase-measuring Shack cube interferometer. In addition we outline procedures for fabricating and testing the optical components. Allowable errors for all parameters are determined by a tolerance analysis that separates axisymmetric and residual figure errors. An open construction optics frame provides a high degree of metering flexibility by incorporating simple kinematic mounts that provide adjustment of each lens while also allowing the lens to be removed and replaced with < 2-μm absolute repeatability. Nonaxisymmetric alignment errors are removed by rotating the optics on a high-precision bearing. Axial spacings are measured with contact transducers attached to both ends of an Invar metering rod. Two completed systems have guided the stressed-lap polishing of 1.8-mf/1.0 and 3.5-m f/1.5 aspheric mirrors.

© 1992 Optical Society of America

History
Original Manuscript: February 28, 1992
Published: December 1, 1992

Citation
S. C. West, J. H. Burge, R. S. Young, D. S. Anderson, C. Murgiuc, D. A. Ketelsen, and H. M. Martin, "Optical metrology for two large highly aspheric telescope mirrors," Appl. Opt. 31, 7191-7197 (1992)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-31-34-7191


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References

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