A New Approach To The Specification Of Non-Functional Surface Defects In Optical Systems

ALAN CHAPMAN

doi:10.1117/12.954689

16 March 1976 A New Approach To The Specification Of Non-Functional Surface Defects In Optical Systems

ALAN CHAPMAN

Author Affiliations +

Proceedings Volume 0073, Quality Assurance in Optical and Electro-Optical Engineering; (1976) https://doi.org/10.1117/12.954689
Event: Quality Assurance in Optical and Electro-Optical Engineering, 1975, Delft, Netherlands

Abstract

The discussion which continually surrounds the subject of nonÃ¢â‚¬â€?functional defects on the surfaces of glass components in optical systems; "cosmetic defects" by British Standards definition would indicate that the problem of adequate specification and assessment of such defects is by no means satisfactorily solved. This particular contribution to the dialogue is in the form of a positive recommendation for a change in the method of specifying such defects in relationship to complete optical systems. The need for such a change arises from the inconsistancies which occur from the use of methods which provide for component assessment only and which attempt to define subjective defects by objective criteria and which have grown from the use of inspection methods more suited to dimensional parameters. I have considered for some time that the general principles of quality control and assurance now being practised allow a method of assessment which is more suited to the subjective nature of the defects under consideration. This presentation of these recommendations at the 1975 International Conference on Quality Assurance in Optics is made to put forward my thoughts in order to determine the extent of support for changes along the lines proposed.

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ALAN CHAPMAN "A New Approach To The Specification Of Non-Functional Surface Defects In Optical Systems", Proc. SPIE 0073, Quality Assurance in Optical and Electro-Optical Engineering, (16 March 1976); https://doi.org/10.1117/12.954689

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