Angle encoder

Details Angle encoder Angle encoder

1991-11-27

1992-10-06

Haroian, Harry N.

Geometrical instruments

Miscellaneous

Light direction

33707, 33 1L, G01B 1100

Patent

active

051520664

ABSTRACT:
The angle encoder comprises a transmitter disk, which is provided with two circular measuring scales, preferably incremental measuring scales. A scanning unit is associated with each of said measuring scales and during a rotation of said disk relative to said scanning head is adapted to scan said scale with reflected light and to optoelectronically generate measured-value signals, such as control signals in response to said scanning. To minimize the effect of a radial runout on the accuracy of the measurement and to permit a providing of the measuring scales on the transmitter disk by a copying process, the transmitter disk has at least one frustoconical outside surface, which is centered on the axis of rotation and is provided with the measuring scales. A process of manufacturing the transmitter disk is also described.

REFERENCES:
patent: 4387299 (1983-06-01), Akiyama
patent: 4530155 (1985-07-01), Burkhardt
patent: 4972599 (1990-11-01), Ernst

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