Brief Description of Finish Grade and Tolerance
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a. For optical quartz lenses/plates/discs (material such as jgs1 / jgs2 / jgs3), our polishing grade (surface finish) is generally 60 / 40 (or Ra0.2), and other deep polishing requirements (such as: 30 / 20, 20 / 10) are able to be customized. b. For dimensional tolerance, our common control range is width / length or diameter ±...