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Proceedings Paper

Development of manufacturing technologies for hard optical ceramic materials
Author(s): Edward Fess; Scott DeFisher; Mike Cahill; Frank Wolfs
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Paper Abstract

Hard ceramic optical materials such as sapphire, ALON, Spinel, or PCA can present a significant challenge in manufacturing precision optical components due to their tough mechanical properties. These are also the same mechanical properties that make them desirable materials when used in harsh environments. Premature tool wear or tool loading during the grinding process is a common result of these tough mechanical properties. Another challenge is the requirement to create geometries that conform to the platforms they reside in, but still achieve optical window tolerances for wavefront. These shapes can be complex and require new technologies to control sub aperture finishing techniques in a deterministic fashion. In this paper we will present three technologies developed at OptiPro Systems to address the challenges associated with these materials and complex geometries. The technologies presented will show how Ultrasonic grinding can reduce grinding load by up to 50%, UltraForm Finishing (UFF) and UltraSmooth Finishing (USF) technologies can accurately figure and finish these shapes, and how all of them can be controlled deterministically, with utilizing metrology feedback, by a new Computer Aided Manufacturing (CAM) software package developed by OptiPro called ProSurf.

Paper Details

Date Published: 22 May 2015
PDF: 9 pages
Proc. SPIE 9453, Window and Dome Technologies and Materials XIV, 94530C (22 May 2015); doi: 10.1117/12.2180519
Show Author Affiliations
Edward Fess, OptiPro Systems Inc. (United States)
Scott DeFisher, OptiPro Systems Inc. (United States)
Mike Cahill, OptiPro Systems Inc. (United States)
Frank Wolfs, OptiPro Systems Inc. (United States)

Published in SPIE Proceedings Vol. 9453:
Window and Dome Technologies and Materials XIV
Brian J. Zelinski; Randal W. Tustison, Editor(s)

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