Pointer with a hollow shaft

DRIVE December 17, 2003
Source
The analog pointer instrument has a pointer device mounted on a rotatable shaft (4), an arrangement with which a light beam (6) can be coupled out from a source (7) and into the pointer device, a reflection element (11) that deflects the coupled in beam and a scale on which the deflected light beam causes a light appearance that forms an illuminated pointer. The coupled in light beam is passed through free space.

Discussion in the ATmosphere

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