Angle measuring device with correction grid

Details Angle measuring device with correction grid Angle measuring device with correction grid

1991-04-25

1992-12-22

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250237G, G01D 534

Patent

active

051736012

ABSTRACT:
An interference type angle measuring device has a graduated disk with a circular graduation. This circular graduation is scanned by a scanning device, which is constructed as a monolithically integrated optical circuit with two diametrical scanning areas. Simply structured coupling and decoupling grids are used as coupling elements, which have also simply constructed correction grids placed upstream or downstream thereof.

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"Photoelectrical Measurement of the Change of Lengths or Angular Positions with the Help of Diffraction Lattices," Hock, Dissertation Approved by the University of Stuttgart, submitted Oct. 29, 1975, pp. 183-184.

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