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Fabricating and testing of the trim plate for the Zwicky Transient Facility
Author(s): Chen Xu; Yi Zheng; Bo Li; Xinnan Li; Zhe Chen; Kunxing Chen; Bin Liang
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Paper Abstract

The Zwicky Transient Facility (ZTF) is a new time-domain survey project that will use a new camera with a 47 square degree field of view mounted on the Samuel Oschin 48-inch Schmidt telescope. To achieve good image quality over all sixteen 6K*6K CCDs (386mm*395mm corner to corner), a trim plate was added in front of the existing cemented achromatic doublet to form an air-spaced triplet corrector. The trim plate is a Schmidt corrector using fused silica with 1348mm in diameter but only 15mm in thickness. The plate has been completed at NIAOT and already been mounted to the ZTF, the PSF seems very good.

The detailed fabrication process and testing to the trim plate from fine grinding to finish are presented in this paper, which includes CMM test, NULL test design, and Computer Controlled Polishing process developed at NIAOT.

Paper Details

Date Published: 10 July 2018
PDF: 7 pages
Proc. SPIE 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III, 1070630 (10 July 2018); doi: 10.1117/12.2312349
Show Author Affiliations
Chen Xu, Nanjing Institute of Astronomical Optics & Technology (China)
Yi Zheng, Nanjing Institute of Astronomical Optics & Technology (China)
Bo Li, Nanjing Institute of Astronomical Optics & Technology (China)
Xinnan Li, Nanjing Institute of Astronomical Optics & Technology (China)
Zhe Chen, Nanjing Institute of Astronomical Optics & Technology (China)
Kunxing Chen, Nanjing Institute of Astronomical Optics & Technology (China)
Bin Liang, Nanjing Institute of Astronomical Optics & Technology (China)


Published in SPIE Proceedings Vol. 10706:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III
Ramón Navarro; Roland Geyl, Editor(s)

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