Discussion Of A Model Of Lens Surface Geometry Through High-Speed Generating, Smoothing And Polishing And Of Aspects In Its Practical Achievement

F. W. Clarke

doi:10.1117/12.955501

14 October 1977 Discussion Of A Model Of Lens Surface Geometry Through High-Speed Generating, Smoothing And Polishing And Of Aspects In Its Practical Achievement

F. W. Clarke

Author Affiliations +

Proceedings Volume 0109, Advances in Optical Production Technology I; (1977) https://doi.org/10.1117/12.955501
Event: Advances in Optical Production Technology, 1977, London, United Kingdom

Abstract

Generally speaking, there are three basic steps in processing a lens surface - rough to shape, refine the surface, polish - whether loose - or bonded-abrasive methods are employed. It is, though, an occasion for disappointment when bonded-abrasive - "high-speed" - methods are substituted into a loose-abrasive system and without a fundamental change in operational philosophy. Loose-abrasive methodology tends to zero-in on the figure and surface at the end of the process. Bonded-abrasive systems begin with figure control and operate further only on surface. Unlike loose abrasive smoothing bonded-diamond laps have extremely limited capability for figure correction. Conversely they produce a continuum of work virtually identical - piece-to-piece. And in such circumstance plastic flow in the polishing lap is unnecessary. In these circumstances two significant changes in optical shop operations result. The character of the curve generating usually must be considerably enhanced, and batch processing is replaced by a continuous, sequential flow of material. Establishing a practical example and setting the dimensional and operating parameters, we may consider the unique problems and the methods of achieving a successful system of "hi-speed" production. In particular the problems in curve generating and the character of that equipment and the contribution of a continuous work flow through operational series are detailed.

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F. W. Clarke "Discussion Of A Model Of Lens Surface Geometry Through High-Speed Generating, Smoothing And Polishing And Of Aspects In Its Practical Achievement", Proc. SPIE 0109, Advances in Optical Production Technology I, (14 October 1977); https://doi.org/10.1117/12.955501

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KEYWORDS

Polishing

Surface finishing

Abrasives

Optical spheres

Glasses

Diamond

Interfaces

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