Null-Screen Testing of Fast Convex Aspheric Surfaces
Applied Optics, Vol. 39, Issue 16, pp. 2670-2677 (2000)
http://dx.doi.org/10.1364/AO.39.002670
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Abstract
A method for null-testing fast convex aspheric optical surfaces is presented. The method consists of using a cylindrical screen with a set of lines drawn on it in such a way that its image, which is formed by reflection on a perfect surface, yields a perfect square grid. Departures from this geometry are due to imperfections of the surface, allowing one to know if the surface is close to the design shape. Tests conducted with a full hemisphere and with the parabolic surface of a lens show the feasibility of the method. Numerical simulations show that it is possible to detect surface departures as small as 5 μm.
© 2000 Optical Society of America
[Optical Society of America ]
OCIS Codes
(120.6650) Instrumentation, measurement, and metrology : Surface measurements, figure
(220.4840) Optical design and fabrication : Testing
(350.4800) Other areas of optics : Optical standards and testing
Citation
Rufino Díaz-Uribe and Manuel Campos-García, "Null-Screen Testing of Fast Convex Aspheric Surfaces," Appl. Opt. 39, 2670-2677 (2000)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-16-2670
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