The testing scheme for the LAMOST focal plane plate

Zengxiang Zhou; Yi Jin; Jianping Wang; Xiaofeng Li; Xiaozheng Xing

doi:10.1117/12.787078

11 July 2008 The testing scheme for the LAMOST focal plane plate

Zengxiang Zhou, Yi Jin, Jianping Wang, Xiaofeng Li, Xiaozheng Xing

Proceedings Volume 7014, Ground-based and Airborne Instrumentation for Astronomy II; 701442 (2008) https://doi.org/10.1117/12.787078
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

At present, the LAMOST project is in a crucial period. The machining progressing of LAMOST Focal Plane Plate has completed. The inspection of the machining quality for the Focal Plane Plate in the machining process is a pivotal work. In all of the design requirements, the most crucial standards of accuracy are the profile tolerance and the unit-holes dimensional angle. Theirs precision will influence the observation efficiency of the LAMOST. But there are more than 4000 unit-holes on the 1.75m diameter Focal Plane Plate, it is impossible to measure all unit-holes and the whole area of the Focal Plane Plate. How to measure the minimal unit-hole and get the most accurate results about the machining process, judge whether the final machining Focal Plane Plate satisfy the design requirements. The measurement scheme optimization is discussed in the paper. There are two different ways to measure the Focal Plane Plate, one is the traditional way whish use specially designed implements for the every individual parameter, the other way used the CMM to measure the pivotal design requirements such as unit-hole dimensional angle and the profile tolerance of the Focal Plane Plate. The advantage of this is saving the time and cost on the CMM, improving the efficiency for the whole measurement work, and acquires the direct vision results before measuring the Focal Plane Plate on CMM. Whereas the implement which used in the measurement need to design and machine precisely for the credible measurement results. And all the measuring work is calibrated by the CMM sampling detection. The sampling detection based on the processing technology and some implements are mentioned in the paper.

Citation Download Citation

Zengxiang Zhou, Yi Jin, Jianping Wang, Xiaofeng Li, and Xiaozheng Xing "The testing scheme for the LAMOST focal plane plate", Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 701442 (11 July 2008); https://doi.org/10.1117/12.787078

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available