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Scanning unit for optical position measurement device has compensation detector elements with centers of area on circle of center coincident with optical axis defined by light source center
Scanning unit for optical position measurement device has compensation detector elements with centers of area on circle of center coincident with optical axis defined by light source center
The unit has a light source (21), an incremental signal scanning arrangement (22.1-22.8), reference pulse detector elements (24.1-24.4) and several compensation detector elements (23.1-23.4) distributed around the incremental signal scanning arrangement so that their centers of area lie on a circle whose center point coincides with the optical axis (OA) defined by the geometric center point of the light source.
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