Analysis of the measurement error of fibers' position for LAMOST

Yi Jin; Chao Zhai; Yong Teng; Xiaozheng Xing

doi:10.1117/12.783482

27 November 2007 Analysis of the measurement error of fibers' position for LAMOST

Yi Jin, Chao Zhai, Yong Teng, Xiaozheng Xing

Proceedings Volume 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 672339 (2007) https://doi.org/10.1117/12.783482
Event: 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 2007, Chengdu, China

Abstract

In a fiber positioning system, geometrical coordinates of fibers need to be measured in order to verify the precision of fiber positioning. So a measurement system based on area CCD is built up. This system consists of an area CCD sensor, a frame grabber, a lens and a computer. Photogrammetric measurement has a high position detection precision for static objects and its measurement precision could be about 5 microns. Fibers are installed in the positioning units and can point to any point in the circular area with 33mm diameter. So not only temperature, vibration, lens aberration but also F number, lamp-house and speckle status will probably cause measuring error. Through lots of experiments, different factors which influence to fibers' position measurement precision are analyzed. From the experimental data of distances between fibers, whose actual values are unchangeable. It could be seen that measurement values of distances have a change at least 12 microns through Photogrammetric measurement when fibers rotate to different angles. Finally the measurement error is analyzed briefly.

Citation Download Citation

Yi Jin, Chao Zhai, Yong Teng, and Xiaozheng Xing "Analysis of the measurement error of fibers' position for LAMOST", Proc. SPIE 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 672339 (27 November 2007); https://doi.org/10.1117/12.783482

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