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Gentec Electro-Optics Inc   - Measure With Gentec Accuracy LB

Photonics Design and Solutions

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A Better Roughness Gauge?

Mike Coursey

We, as polishers, are constantly pursuing the perfect surface. We want it flat -- very flat -- and we want it smooth -- very smooth. But what does that really mean? Is root mean square (rms) surface roughness the answer? We can take rms readings to angstrom and even subangstrom levels, and we have been doing that for a very long time, but is that the magic cure-all to surface quality?

For years, we have designed ideal surfaces around rms surface roughness measurements and developed the technology of polishing to accomplish subangstrom levels on some surfaces. We developed software and metrology hardware to analyze these surfaces...
Ohara Corp. - Optical Glass, Polish substrates 10-23

Published: July 2001
Glossary
metrology
Metrology is the science and practice of measurement. It encompasses the theoretical and practical aspects of measurement, including the development of measurement standards, techniques, and instruments, as well as the application of measurement principles in various fields. The primary objectives of metrology are to ensure accuracy, reliability, and consistency in measurements and to establish traceability to recognized standards. Metrology plays a crucial role in science, industry,...
Featuresmetrology

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