Texture Standards For Defence Optics

Lionel R. Baker

doi:10.1117/12.969657

1 April 1990 Texture Standards For Defence Optics

Lionel R. Baker

Proceedings Volume 1191, Optical Systems for Space and Defence; (1990) https://doi.org/10.1117/12.969657
Event: SIRA/Optical Systems for Space and Defence, 1989, London, United Kingdom

Abstract

Increase in international trade has highlighted a long-standing problem of specifying the levels of surface quality needed for the wide range of optical components employed in modern defence equipment. This paper will review the problems resulting from the use of existing national standards and the effectiveness of the various suggestions made to create objective methods of measurement. After extensive trials, it has been concluded that the most appropriate and convenient way of quantifying a flaw is by measuring the total amount of light it removes from a beam of light and the preferred way of measuring surface roughness is by some form of micro-interferometry. The paper concludes by describing the design and performance of a microscope image comparator, which is capable of quantifying flaws and roughness, has traceability to national standards, and which is expected to form the basis of a revision of BS 4301 and a new ISO standard.

Citation Download Citation

Lionel R. Baker "Texture Standards For Defence Optics", Proc. SPIE 1191, Optical Systems for Space and Defence, (1 April 1990); https://doi.org/10.1117/12.969657

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KEYWORDS

Standards development

Surface finishing

Defense and security

Optical components

Polishing

Calibration

Light scattering

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