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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 25 — Sep. 1, 1998
  • pp: 5969–5973

Testing aspheric surfaces: simple method with a circular stop

Andrianto Handojo and Hans J. Frankena  »View Author Affiliations


Applied Optics, Vol. 37, Issue 25, pp. 5969-5973 (1998)
http://dx.doi.org/10.1364/AO.37.005969


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Abstract

As an extension of the knife-edge test, a noninterferometric method for inspecting circularly symmetric aspheres is proposed in which the test surface is illuminated by a spherical wave. When a small circular stop is placed around the curvature center of the best-fitting sphere, only rays characteristic for the deviation from a perfect sphere remain unobstructed. An image of the tested surface is thereby obtained, showing light and dark regions whose boundaries are correlated to the surface profile, the stop size, and the stop position along the symmetry axis. The experiment has been carried out with a paraboloid.

© 1998 Optical Society of America

OCIS Codes
(120.6650) Instrumentation, measurement, and metrology : Surface measurements, figure
(220.1250) Optical design and fabrication : Aspherics
(220.4840) Optical design and fabrication : Testing
(240.6700) Optics at surfaces : Surfaces

History
Original Manuscript: October 1, 1997
Revised Manuscript: March 12, 1998
Published: September 1, 1998

Citation
Andrianto Handojo and Hans J. Frankena, "Testing aspheric surfaces: simple method with a circular stop," Appl. Opt. 37, 5969-5973 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-25-5969

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