NDT.net - April 2002, Vol. 7 No.04

Quasi-Absolute Test for Aspheric Surfaces Using Computer Generated Hologramms

M. Beyerlein, N. Lindlein, J. Schwider.
University of Erlangen-Nurenberg, Chair for Optics
Staudtstrasse 7 B2, D-91058 Erlangen

1. Introduction

2. Quasi-absolute testing of aspherics

3. Dual wavefront CGHs

4. Discussion of the disturbing diffraction orders

5. Conclusion

  1. M. Born and E. Wolf, Principles in Optics, Pergamon Press, Oxford, (1980) 197-202.
  2. G. Schulz and J. Schwider, "Interferometric testing of smooth surfaces," Prog. in Optics XIII, E. Wolf, Ed., Elsevier Publisher New York, (1976).
  3. E.Carcolé, M. S. Millán, and J. Campos, "Derivation of weighting coefficients for multiplexed phase-diffractive elements," Opt. Lett. 20, 2360-2362 (1995).
  4. J. Schwider, "Absolutprüfung von asphärischen Flächen unter Zuhilfenahme von diffraktiven Normalelementen und planen sowie sphärischen Referenzflächen," Patent- Offenlegungsschrift AZ 198 20 785.9 (17.4.1998).
  5. N. Lindlein, "Analysis of the disturbing diffraction orders of computer generated holograms used for testing optical aspherics," accepted by Appl. Opt., scheduled for June 1 issue 2001.
  6. W. T. Welford, "A vector raytracing equation for hologram lenses of arbitrary shape," Opt. Comm. 14, 322-323 (1975).

This Paper was presented at Fringe 2001 "The 4th International Workshop on Automatic Processing of Fringe Patterns" held in Bremen, Germany, 17-19 September 2001. Proceedings edited by Wolfgang Osten, BIAS, Germany. Please contact Wolfgang Osten for full set of proceedings at wolfgang@uni-bremen.de.

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