Interference fringes from superimposed beams move across a photodetector, creating electrical pulses. Frequency of pulses is direct measure of angular velocity of rotating body. If separation of the sources changes, it affects separation of all fringes equally and does not affect angular velocity measurement.
Interferometer Accurately Measures Rotation Angle
NASA Tech Briefs ; 6 , 1
01.09.1982
Sonstige
Keine Angabe
Englisch
Electrolytic device accurately measures component operating time
Kraftfahrwesen | 1975
|Rotating mechanism capable of accurately controlling rotating angle
Europäisches Patentamt | 2024
|Grating interferometer measures large departures
British Library Online Contents | 1996
Combined interferometer measures absolute distances precisely
British Library Online Contents | 2009