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1 August 2017 A calibration mechanism based on worm drive for space telescope
Yaqin Chong, Chuang Li, Siyu Xia, Peifeng Zhong, Wang Lei
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Proceedings Volume 10339, Pacific Rim Laser Damage 2017: Optical Materials for High-Power Lasers; 103391S (2017) https://doi.org/10.1117/12.2269878
Event: Pacific Rim Laser Damage 2017: Optical Materials for High Power Lasers, 2017, Shanghai, China
Abstract
In this paper, a new type of calibration mechanism based on worm drive is presented for a space telescope. This calibration mechanism based on worm drive has the advantages of compact size and self-lock. The mechanism mainly consists of thirty-six LEDs as the light source for flat calibration, a diffuse plate, a step motor, a worm gear reducer and a potentiometer. As the main part of the diffuse plate, a PTFE tablet is mounted in an aluminum alloy frame. The frame is fixed on the shaft of the worm gear, which is driven by the step motor through the worm. The shaft of the potentiometer is connected to that of the worm gear to measure the rotation angle of the diffuse plate through a flexible coupler. Firstly, the calibration mechanism is designed, which includes the LEDs assembly design, the worm gear reducer design and the diffuse plate assembly design. The counterweight blocks and two end stops are also designed for the diffuse plate assembly. Then a modal analysis with finite element method for the diffuse plate assembly is completed.
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Yaqin Chong, Chuang Li, Siyu Xia, Peifeng Zhong, and Wang Lei "A calibration mechanism based on worm drive for space telescope", Proc. SPIE 10339, Pacific Rim Laser Damage 2017: Optical Materials for High-Power Lasers, 103391S (1 August 2017); https://doi.org/10.1117/12.2269878
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KEYWORDS
Calibration
Worm drives
Space telescopes
Analytical research
Finite element methods
Light sources
Modal analysis
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