A designer's point of view on integration of ANSI scratch and dig into ISO surface imperfections

Dirk Jahn

doi:10.1117/12.2323899

19 September 2018 A designer's point of view on integration of ANSI scratch and dig into ISO surface imperfections

Dirk Jahn

Proceedings Volume 10747, Optical System Alignment, Tolerancing, and Verification XII; 107470F (2018) https://doi.org/10.1117/12.2323899
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States

Abstract

There are two distinct problems in determining optical surface defects. On one hand, we have a measurable area-based destruction of the wave front. This can be easily classified by optical designers based on contrast loss. On the other hand, we have brightness-based and magnification-dependent aesthetic imperfections. They have to be classified according to their visibility. So far only a dimensional classification of imperfections has been possible in the ISO standard. The integration of ANSI "Scratch & Dig" into the ISO standard offers the possibility to classify aesthetic imperfections with standardized reference plates. This paper will give an introduction to both methods.

Conference Presentation

Citation Download Citation

Dirk Jahn "A designer's point of view on integration of ANSI scratch and dig into ISO surface imperfections", Proc. SPIE 10747, Optical System Alignment, Tolerancing, and Verification XII, 107470F (19 September 2018); https://doi.org/10.1117/12.2323899

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