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Priority to FI896218ApriorityCriticalpatent/FI86919C/en
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Publication of FI896218ApublicationCriticalpatent/FI896218A/en
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Publication of FI86919CpublicationCriticalpatent/FI86919C/en
Length Measuring Devices With Unspecified Measuring Means
(AREA)
Abstract
The invention concerns a calibration means for simplifying the calibration of a measuring system, whereby the roughness of a surface is measured. The means comprises a level plate 1 on whose surface there are parallel combs 2 whose height h is known. <IMAGE>
FI896218A1989-12-221989-12-22
Calibrators and method of making them
FI86919C
(en)