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Comparison Standard Scratch And Dig
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Meaningful surface roughness and quality tolerances
www.savvyoptics.comThis approach to surface imperfections was first proposed by McLeod and Sherwood in 19452.They offered up comparison standards numbered from 10 to 120, to be used in this comparison method.
April, 2013 Revision 2.0 Dave Aikens - Savvy Optics
savvyoptics.comThe MIL-PRF-13830B standard for “scratch and dig” is still active, and used throughout the optics industry By far the most commonly cited imperfection specification for
SCRATCH CRATCH & DIG IG - Universal Photonics
universalphotonics.comTECHNICAL DATA SCRATCHCRATCH & DIGIG SURFACE QUALITYUALITY STANDARDSTANDARDS UNIVERSAL NX3002 PHOTONICS INCO RPOR AT ED Scratch and dig numbers refer to the maximum allowable defect under particular lighting conditions.