Scale and method for making a scale

Details Scale and method for making a scale Scale and method for making a scale

1996-12-13

1999-03-09

Spyrou, Cassandra

Optical: systems and elements

Scale or indicia reading

359566, 359572, 359576, 250237G, G02B 2702, G02B 530

Patent

active

058808825

ABSTRACT:
A scale for opto-electrical linear or angular measuring systems. A gradation in the form of a phase grating is embodied on the scale and has alternating raised and stepped areas. A continuous compensating layer of chrome and on it a continuous highly reflective layer of titanium nitride are applied to one side of a step-like structured base body. The material and the layer thickness of the compensating layer is selected in such a way that it counteracts the mechanical stresses of the reflecting surface layer and thus, in the finished state of the scale, the deposited layers no longer exert stresses on the base body.

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