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Optical Engineering

Computer numeric control subaperture aspheric surface polishing—microroughness evaluation
Author(s): Frantisek Prochaska; Jaroslav Polak; Ondrej Matousek; David Tomka
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Paper Abstract

The aim of this work was an investigation of surface microroughness and shape accuracy achieved on an aspheric lens by subaperture computer numeric control (CNC) polishing. Different optical substrates were polished (OHARA S-LAH 58, SF4, ZERODUR) using a POLITEX™ polishing pad, synthetic pitch, and the natural optical pitch. Surface roughness was measured by light interferometer. The best results were achieved on the S-LAH58 glass and the ZERODUR™ using the natural optical pitch. In the case of SF4 glass, the natural optical pitch showed a tendency to scratch the surface. Experiments also indicated a problem in surface form deterioration when using the natural optical pitch, regardless of the type of optical material.

Paper Details

Date Published: 28 August 2014
PDF: 7 pages
Opt. Eng. 53(9) 092011 doi: 10.1117/1.OE.53.9.092011
Published in: Optical Engineering Volume 53, Issue 9
Show Author Affiliations
Frantisek Prochaska, Institute of Plasma Physics of the ASCR, v.v.i. (Czech Republic)
Jaroslav Polak, Institute of Plasma Physics of the ASCR, v.v.i. (Czech Republic)
Ondrej Matousek, Technical Univ. of Liberec (Czech Republic)
David Tomka, Institute of Plasma Physics of the ASCR, v.v.i. (Czech Republic)

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