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  • International Optical Design Conference and Optical Fabrication and Testing
  • OSA Technical Digest (CD) (Optica Publishing Group, 2010),
  • paper OTuA2
  • https://doi.org/10.1364/OFT.2010.OTuA2

The Truth About Scratch and Dig

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Surface imperfection specifications (i.e. Scratch-Dig) are the most misunderstood, misinterpreted, and ambiguous of all optics component specifications. It is time to de-mystify this problematic specification once and for all. This paper outlines the long history of the surface imperfection part of MIL-PRF-13830B, its origins, and intent. A brief comparison of the visibility of various sets of standards and an overview of alternatives available to define a more objective surface imperfection specification are provided.

© 2010 OSA, SPIE

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