Optics: measuring and testing – By light interference – Having light beams of different frequencies
Reexamination Certificate
2006-05-16
2006-05-16
Toatley, Jr., Gregory J. (Department: 2877)
Optics: measuring and testing
By light interference
Having light beams of different frequencies
C356S499000, C356S485000, C356S616000, C250S23700G
Reexamination Certificate
active
07046368
ABSTRACT:
A position measuring arrangement for determining a relative position between a first object and a second object. The arrangement includes a light source having a single-mode laser light source that generates radiation and a signal generator that receives the radiation and generates displacement-dependent output signals that determine a relative position between a first object and a second object. A feedback device, wherein the laser light source interacts with the feedback device in such a way that an excitation of several modes takes place in the single-mode laser light source, and a multi-mode operation of the single-mode laser light source results.
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patent: 5198873 (1993-03-01), Ishizuka et al.
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patent: WO 02/23131 (2002-03-01), None
U.S. Appl. No. 10/380,847, filed Sep. 24, 2003, Holzapfel et al.
Holzapfel Wolfgang
Linnemann Udo
Brinks Hofer Gilson & Lione
Connolly Patrick J.
Dr. Johannes Heidenhain GmbH
Toatley , Jr. Gregory J.
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