Flatness measuring

Submikron: Flatness measuring

Diagnosis:: Straight and parallel light bands with equal distances to each other indicate a fl at workpiece. The flatness is below 0,3 μ.

Diagnosis: flat surface, but with edge rounding

Fault: Use of too much abrasive, or wrong type. The round edge is also to be identified by a matt edge surface after polishing.

Diagnosis: Interferenzlinien zeigen ein konvexes Werkstück

Fault: Lapping plate is concave

Diagnosis: Interference lines indicate a concave workpiece

Fault: Lapping plate is convex

Diagnosis: The line cuts through 3 light bands and indicates that the flatness is in the range of 0,9 μ.

Fault: Lapping plate is concave

Diagnosis: edge rounding across the ring, the band of the ring is not flat.

Fault:  Use of too much abrasive, or wrong type. The round edge is also to be identified by a matt edge surface after polishing.

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