Translator Disclaimer
25 August 1998 Parallel controllable optical fiber positioning system for LAMOST
Author Affiliations +
Abstract
In present paper we have proposed an optical fiber positioning system for LAMOST (Large Sky Area Multi-Object Fiber Spectroscopy Telescope). In this system, the convex focal plate of the telescope (Its diameter is 1.75 m) is divided into about 4000 individual domains. Each domain contains a controllable unit which is named X-unit. Each unit is specified with the position of its domain with polar coordinates (the angle and the radius distance from the center) by using its center point as reference. Each X-unit can be moved smoothly by verifying the two parameters of polar coordinates. An optical fiber is hold with X-unit and introduced to spectroscope, thus the optical fiber can be moved anywhere within its designated circular domain at the convex focal surface. In addition, the circular domain are overlapped in a `honeycomb-like' arrangement to ensure that there are no blind spots on the convex focal surface, such as that the radius distance of the units is 25 mm, and the positioning range of the optical fibers is 30 mm, thus there will be no `blind areas'. The structural parameters of the X-unit could also be optimized to limit the directional error of the axis in a certain range. Each unit is driven by two stepping motors and mobilized by computer in a way to ensure that the units do not collide with each other. It is possible that very high or very low star densities in areas of the field of view may reduce the observational efficiency of the telescope. This should not a significant problem by using optimization of the observation program.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Xiaozheng Xing, Chao Zhai, Huasheng Du, Weimin Li, Hongzhuan Hu, Ruifang Wang, and Dexiu Shi "Parallel controllable optical fiber positioning system for LAMOST", Proc. SPIE 3352, Advanced Technology Optical/IR Telescopes VI, (25 August 1998); https://doi.org/10.1117/12.319309
PROCEEDINGS
11 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

The new FORS pipeline
Proceedings of SPIE (July 29 2010)
Performance of the WIYN fiber-fed MOS system: Hydra
Proceedings of SPIE (June 13 1995)
Palomar Testbed Interferometer
Proceedings of SPIE (July 23 1998)
Anglo-Australian Telescope's 2dF Facility
Proceedings of SPIE (March 20 1997)

Back to Top