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About This Item
Full Description
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.
Cross References:
ISO 10110-7:2017
ISO 9211-1:2010 Ed 2
ISO 11145:2016
ISO/TR 21477:2017
ISO 10110-1:2006 (R10) Ed 2
ISO 11151
All current amendments available at time of purchase are included with the purchase of this document.
Document History
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BS ISO 14997:2017
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Optics and photonics. Test methods for surface imperfections of optical elements- Most Recent
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BS ISO 14997:2011
Optics and photonics. Test methods for surface imperfections of optical elements- Historical Version
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BS ISO 14997:2003
Optics and optical instruments. Test methods for surface imperfections of optical elements- Historical Version