Improved chopping secondary system for a 300-mm balloon-borne IR telescope

Zunyuan Zhou; Xiang Jiang

doi:10.1117/12.19205

1 July 1990 Improved chopping secondary system for a 300-mm balloon-borne IR telescope

Zunyuan Zhou, Xiang Jiang

Proceedings Volume 1236, Advanced Technology Optical Telescopes IV; (1990) https://doi.org/10.1117/12.19205
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

Abstract

An improved chopping secondary system for a 300 mm balloon-borne IR telescope (BIT) has been developed. BIT is planned to be flown for the first tine in May 1990 in China. Design and overall properties of the chopping secondary system are presented. The important feature of this chopper is its control driver, which is a new type of vibrator. The whole system including the control circuit is very simple, lightweight, and low-cost. A 2-msec rise time of the 93 mm secondary mirror motion was achieved at a frequency of 10 Hz.

Citation Download Citation

Zunyuan Zhou and Xiang Jiang "Improved chopping secondary system for a 300-mm balloon-borne IR telescope", Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); https://doi.org/10.1117/12.19205

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