Asked by: Babul Muthupalaniappanscience space and astronomy
How do you measure flatness with optical flats?
Last Updated: 17th April, 2020
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Regarding this, how is optical flatness measured?
There are a number of ways to measuretheflatness of a surface. The most common method withintheFlat Lapping sector is by using a Monochromatic Sodiumlightunit and an Optical Flat. This gives extremelyprecisemeasurements, more accurate than mostCMMmeasurements, in an economical way.
Furthermore, how do optical flats work? Interference is the principle behind theworkingof optical flats. An optical flat isplaced on asurface, in order to measure its flatness, beforeamonochromatic light is made to pass through the areaofcontact. In cases where the test surface is perfectlyflat,there will be no gap between the twosurfaces.
Correspondingly, how do you calculate flatness?
The flatness of a strip of steel is determinedbymeasuring the maximum deviation between a perfect straight lineandthe steel at two specified distances (t1 and t2).TheFlatness is determined by subtracting t2fromt1.
How many optical flats are there?
Explanation: Optical flats arecylindricalin shape and generally have 2 types i.e Type Aand Type B.Type A has only one surface flat.