Transcription of FLATNESS CONVERSION TABLE - Universal Photonics
1 UNIVERSALPHOTONICSINCORPORATEDSOURCE: ZYGO CORP. AND DYNASIL Surfacing Products & Technology T: T: FLATNESS CONVERSION TABLECONVERSION TABLE *Millimeters or inches is wavelength dependent. Assumes reference = 588nmNumber of BandsMicroinches (Millionths of an inch) microinch = one millionth of an inch = .000001 term microinch is a convenient way of saying one millionth of an inch. A popular term used with sur-face finish measurement, microinch specifies an average value for surface finish. Here, microinchand millionth of aninch are used many purposes, it is sufficient to take 1 band-10 microinches or To make a true tes, bothparts being tested, the work and optical flat, must be allowed to acclimate to the surrounding temperatures at the timeof the test. Testing two flats at different temperatures will resut in an untrue surface: finger pressure at edgesConcave surface: finger pressure at center
