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Measurement of Angular Motion Parameters Exhibited by the Mirror of a Scanning Device

  • LINEAR AND ANGULAR MEASUREMENTS
  • Published:
Measurement Techniques Aims and scope

A scanning device for a space-based environmental monitoring system is examined. Since the uniformity of mirror rotation largely determines the quality of Earth imaging, the present paper focuses on studying angular motion parameters exhibited by the mirror of the scanning device. Along with a discussion of the principles of such measurement, the authors present results of measuring the rotation parameters of the mirror across a wide angular range. The measurements were performed using a dynamic goniometer-autocollimator calibrated according to the GET 22-2014 State Primary Standard of the Plane Angle Unit. The repeatability of the average angular velocity of the scanning mirror is calculated along with that of the initial scan angle. Transiency in terms of the expected value and variance is noted in the random deviations of the angular mirror motion from the linear scanning law. The performed wavelet analysis revealed the periodicity of oscillation excitation in the low-frequency spectral region. It is shown that the dynamic goniometer-autocollimator can be used to measure the angular position of the scanning mirror, as well as its angular velocity.

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Authors and Affiliations

  1. St. Petersburg Electrotechnical University LETI, St. Petersburg, Russia

    P. A. Pavlov & E. M. Ivashchenko

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  1. P. A. Pavlov
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  2. E. M. Ivashchenko
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Correspondence to P. A. Pavlov.

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Translated from Izmeritel’naya Tekhnika, No. 6, pp. 3–7, June 2021.

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Pavlov, P.A., Ivashchenko, E.M. Measurement of Angular Motion Parameters Exhibited by the Mirror of a Scanning Device. Meas Tech 64, 427–432 (2021). https://doi.org/10.1007/s11018-021-01950-0

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  • DOI: https://doi.org/10.1007/s11018-021-01950-0

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