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OEOSC Accredited Course: Understanding Scratch and Dig Specifications

ByOEOSC

Wednesday, 22 October 2025 • 8:30 AM – 12:30 PM EDT

OEOSC Accredited Course: Understanding Scratch and Dig Specifications (SPIE Course SC700)

Surface imperfection specifications (i.e. Scratch-Dig) are among the most misunderstood, misinterpreted, and ambiguous of all optics component specifications. This course provides attendees with an understanding of the source of ambiguity in surface imperfection specifications, and provides the context needed to properly specify surface imperfections using a variety of specification standards, and to evaluate a given optic to a particular level of surface imperfection specification. The course will focus on the differences and application of the Mil-PRF-13830, ISO 10110-7, and ANSI OP1.002. Many practical and useful specification examples are included throughout, as well as a hands-on demonstration on visual comparison evaluation techniques.

The course is followed by SC1017 Optics Surface Inspection Workshop, which provides hands-on experience conducting inspections using the specification information provided in this course.

Learning outcomes

  • describe the various surface imperfection specifications that exist today
  • compose a meaningful surface imperfection specification for cosmetic imperfections using ISO, ANSI, or Mil standards
  • identify the different illumination methods and comparison standards for evaluation
  • demonstrate a surface imperfection visual inspection
  • understand the options available for controlling surface imperfections in a vendor/supplier relationship

Click to Learn More & Register

SPIE OPTIFAB 2025

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