Importance

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Abstract

An optical rotary angle sensor with at least one first measurement member able to move in the measuring direction having light-transparent and non-transparent regions located on it, at least one second measurement member arranged static relative to the first measurement member in the measuring direction, and/or at least one photoelectric transducer. To keep the distance between the rotating measurement member and the static measurement member and/or the optical-electrical transducer very small, i.e. in the range of about 10 20 .mu.m, and to make the centering of the two relative to each other independent of the formerly necessary shaft bearing, the measurement members are configured so that they are properly oriented relative to each other in the measuring direction and kept spaced apart by a guide provided between the measurement members. The guide can be a form-fitting connection in at least one of the directions not representing the measurement direction.

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First Claim