Several proposals for large advanced astronomical telescope

Pin-Zhong Ma

doi:10.1117/12.19256

1 July 1990 Several proposals for large advanced astronomical telescope

Pin-Zhong Ma

Proceedings Volume 1236, Advanced Technology Optical Telescopes IV; (1990) https://doi.org/10.1117/12.19256
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

Abstract

A 16 meter optical telescope is described. The telescope tube has a large and heavy truss that creates deformation; when the telescope tube is rotating, four servos push forward or pull back the main mirror truss to automatically compensate for the deformation. To obtain high image quality and tracking and pointing accuracy, dynamic deflection must be measured and the measuring value should be fed back to servo motors to provide automatic compensation until the system deflection is zero. The interferometer of the automatic compensation system is fixed at the rear of the main mirror to avoid influencing the main optical path. Details are discussed on the measurement of the relative deflection, the honeycomb mirror, and a scheme for main mirror measurement.

Citation Download Citation

Pin-Zhong Ma "Several proposals for large advanced astronomical telescope", Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); https://doi.org/10.1117/12.19256

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