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Dynamic angle measurement by means of a ring laser

Yu V Filatov, D P Loukianov and R Probst

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A ring laser goniometer was investigated in different applications of precision angle measurement, such as the calibration of optical polygons and optical encoders, external angle measurement of rotating objects and inertial angle measurement by rotation of the goniometer itself. The results agree with standard methods of angle measurement to about 0,5 µrad (0,1 ). Further improvement in accuracy is expected mainly from the reduction of noise in the mechanical and electrical setup of the measurement system.


PACS

42.55.Wd Fiber lasers

06.20.F- Units and standards

06.30.Bp Spatial dimensions (e.g., position, lengths, volume, angles, and displacements)

06.20.Dk Measurement and error theory

42.79.-e Optical elements, devices, and systems

42.60.Da Resonators, cavities, amplifiers, arrays, and rings

Subjects

Instrumentation and measurement

Optics, quantum optics and lasers

Dates

Issue 4 (1997)



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