Optical position-measuring device

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United States of America Patent

PATENT NO 11828630
APP PUB NO 20210010807A1
SERIAL NO

16926571

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Abstract

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In an optical position-measuring device for acquiring the rotational angle between two objects that are rotationally moveable relative to each other, a grating measuring standard rotating about an axis of rotation is arranged as a reflection grating. Position information both about an azimuthal rotary movement about the axis of rotation and about a radial displacement of the grating measuring standard is able to be obtained. At least one detection unit is used for scanning the rotating grating measuring standard in order to determine the azimuthal rotational angle as well as a radial displacement of the grating measuring standard. The neutral pivot points of the scanning of the grating measuring standard for the determination of the rotational angle and the displacement are situated in the same plane, with this plane being situated in parallel with the grating measuring standard. The neutral pivot point denotes the particular location about which the grating measuring standard or the detection unit is able to be tilted without a position offset.

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Patent Owner(s)

Patent OwnerAddress
DR JOHANNES HEIDENHAIN GMBHDR -JOHANNES-HEIDENHAIN-STR 5 TRAUNREUT 83301

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Frese, Daniel Traunstein, DE 4 7
Holzapfel, Wolfgang Obing, DE 125 1123
Lingk, Christoph Traunstein, DE 8 63

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