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  • BSI
    BS ISO 14997:2017 Optics and photonics. Test methods for surface imperfections of optical elements
    Edition: 2017
    $411.69
    / user per year

Description of BS ISO 14997:2017 2017

This document specifies the physical principles and practical means for the implementation of methods for evaluating surface imperfections.

For imperfections specified using the visibility method, two inspection methods are described. The first is visual evaluation of the surface without any comparison standard (IVV). The second is a visibility assessment of a surface imperfection when compared to an artefact of known brightness (ISV).

For imperfections specified using the dimensional method, three methods are described. The first is visual evaluation of the surface without any comparison standard (IVD). The second is a dimensional assessment of a surface imperfection when compared to an artefact of known size (ISD). The third is the dimensional measurement of a surface imperfection using magnification and either a comparison artefact of known size or a reticle or ruler (IMD).

Instruments exist that allow objective measurement of brightness (digital scatterometry) or size (digital microscopy). While these instruments can be used for evaluation of surface imperfections, they are beyond the scope of this document.

This document applies to optical surfaces of components or assemblies such as doublets or triplets.

This document can be applied to optical plastic components; however, attention is drawn to the fact that impact damage to plastic materials often looks very different from that on harder materials as it does not always result in the removal of material but instead can displace material, causing ripples in the surface. Consequently, visual comparisons of scratch and dig damage to plastic with those on glass or crystalline materials can give very different results.



Standard NumberBS ISO 14997:2017
TitleOptics and photonics. Test methods for surface imperfections of optical elements
StatusConfirmed
Publication Date2017-09-19
ReplacesBS ISO 14997:2011
Identical National Standard OfISO 14997:2017
DescriptorsDefects, Surface defects, Optics, Physical testing, Optical instruments, Visual inspection (testing)
ICS37.020 Optical equipment
CommitteeCPW/172
ISBN978 0 580 88948 6
PublisherBSI
Pages24

The following editions for this book are also available...

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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