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Proceedings Paper

A calibration mechanism based on worm drive for space telescope
Author(s): Yaqin Chong; Chuang Li; Siyu Xia; Peifeng Zhong; Wang Lei
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Paper 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.

Paper Details

Date Published: 1 August 2017
PDF: 9 pages
Proc. SPIE 10339, Pacific Rim Laser Damage 2017: Optical Materials for High-Power Lasers, 103391S (1 August 2017); doi: 10.1117/12.2269878
Show Author Affiliations
Yaqin Chong, Xi'an Institute of Optics and Precision Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Chuang Li, Xi'an Institute of Optics and Precision Mechanics (China)
Siyu Xia, Xi'an Institute of Optics and Precision Mechanics (China)
Peifeng Zhong, Xi'an Institute of Optics and Precision Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Wang Lei, Xi'an Institute of Optics and Precision Mechanics (China)


Published in SPIE Proceedings Vol. 10339:
Pacific Rim Laser Damage 2017: Optical Materials for High-Power Lasers
Jianda Shao; Takahisa Jitsuno; Wolfgang Rudolph, Editor(s)

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