A simple model for studying rotation errors of gimbal mount axes in laser tracking system based on spherical mirror as a reflection unit

Huixu Song; Zhaoyao Shi; Hongfang Chen; Yanqiang Sun

doi:10.1117/12.2292805

12 January 2018 A simple model for studying rotation errors of gimbal mount axes in laser tracking system based on spherical mirror as a reflection unit

Huixu Song, Zhaoyao Shi, Hongfang Chen, Yanqiang Sun

Author Affiliations +

Proceedings Volume 10621, 2017 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems; 106210C (2018) https://doi.org/10.1117/12.2292805
Event: International Conference on Optical Instruments and Technology 2017, 2017, Beijing, China

Abstract

This paper presents a novel experimental approach and a simple model for verifying that spherical mirror of laser tracking system could lessen the effect of rotation errors of gimbal mount axes based on relative motion thinking. Enough material and evidence are provided to support that this simple model could replace complex optical system in laser tracking system. This experimental approach and model interchange the kinematic relationship between spherical mirror and gimbal mount axes in laser tracking system. Being fixed stably, gimbal mount axes’ rotation error motions are replaced by spatial micro-displacements of spherical mirror. These motions are simulated by driving spherical mirror along the optical axis and vertical direction with the use of precision positioning platform. The effect on the laser ranging measurement accuracy of displacement caused by the rotation errors of gimbal mount axes could be recorded according to the outcome of laser interferometer. The experimental results show that laser ranging measurement error caused by the rotation errors is less than 0.1 μm if radial error motion and axial error motion are under 10 μm. The method based on relative motion thinking not only simplifies the experimental procedure but also achieves that spherical mirror owns the ability to reduce the effect of rotation errors of gimbal mount axes in laser tracking system.

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Huixu Song, Zhaoyao Shi, Hongfang Chen, and Yanqiang Sun "A simple model for studying rotation errors of gimbal mount axes in laser tracking system based on spherical mirror as a reflection unit", Proc. SPIE 10621, 2017 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 106210C (12 January 2018); https://doi.org/10.1117/12.2292805

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KEYWORDS

Mirrors

Spherical lenses

Laser systems engineering

Ranging

Interferometers

Motion measurement

Eye

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