Optics: measuring and testing – By light interference – For dimensional measurement
Reexamination Certificate
2007-09-25
2007-09-25
Toatley, Jr., Gregory J. (Department: 2877)
Optics: measuring and testing
By light interference
For dimensional measurement
C356S499000, C250S23700G
Reexamination Certificate
active
10493153
ABSTRACT:
A position measuring device for detecting the spatial position of a movable element in relation to a base body, the device including a linear measuring device that measures a distance between a movable element and a base body and an angle-measuring apparatus that measures an angle between the movable element and the base body. A light source that directs light along a beam path, a detector within the beam path and a grating within the beam path between the light source and the detector. For measuring the angle, the beam path extends between the movable element and the base body so that an intensity strip pattern is created by illuminating the grating by the light source, whose position relative to the detector is a measure of the angle.
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Braasch Jan
Holzapfel Wolfgang
Seyfried Volker
Tondorf Sebastian
Brinks Hofer Gilson & Lione
Connolly Patrick
Dr. Johannes Heidenhain GnbH
Toatley , Jr. Gregory J.
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