Study of V/Q non-linearity in scientific CMOS sensor

	Study of V/Q non-linearity in scientific CMOS sensor
	Li, J.-L.; Y.-F. Guo and T.-J. Lan
	2016
发表期刊	International Journal of Grid and Distributed Computing
卷号	9 期号:6
摘要	When the primary mirror position of a telescope is adjusted, its position should be measured in real time. This paper proposes an on line measuring system for the primary mirror position based on position sensors. By taking the deformation of a mirror cell into account, a algorithm to solve the primary mirror position was obtained by using the space analytic geometry method. A 1.23 m SiC mirror in our lab was used to complete the online measuring experiment for the primary mirror position. The measuring data were collected in real time by using 6 position sensors fixed at the back and later of the mirror when the mirror was turning around the rotation axis. The cell deformation was also analyzed by using finite element method. Finally, the measuring values by the sensors and the cell deformation value were taken as the system's difference to introduce the algorithm to obtain the X\\Y\\Z displacements, rotation angles around X\\Y axis and the extension of mirror radius caused by temperature changing. Experimental results indicate that the stiffness of axial supporting mechanism is much larger than that of the lateral one. When the rotation angle of mirror is 45, the mirror displacement in Z direction is about 20 m, and that in X and Z directions are 146 m and 100 m, respectively. The accuracy of this method is verified by the test results, which provides a reference for the correction of primary mirror positions in telescopes. 2016, Science Press. All right reserved.
文章类型	期刊
收录类别	EI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/57023
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Li, J.-L.,Y.-F. Guo and T.-J. Lan. Study of V/Q non-linearity in scientific CMOS sensor[J]. International Journal of Grid and Distributed Computing,2016,9(6).
APA	Li, J.-L.,&Y.-F. Guo and T.-J. Lan.(2016).Study of V/Q non-linearity in scientific CMOS sensor.International Journal of Grid and Distributed Computing,9(6).
MLA	Li, J.-L.,et al."Study of V/Q non-linearity in scientific CMOS sensor".International Journal of Grid and Distributed Computing 9.6(2016).

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