Optimal scanning function for capturing segmented mirror in space optics system

Xiaofang Zhang; Xin Yu; Xia Wang; Jiaguo Liu; Kui Yang

doi:10.1117/12.790820

22 February 2008 Optimal scanning function for capturing segmented mirror in space optics system

Xiaofang Zhang, Xin Yu, Xia Wang, Jiaguo Liu, Kui Yang

Proceedings Volume 6622, International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology; 662214 (2008) https://doi.org/10.1117/12.790820
Event: International Symposium on Photoelectronic Detection and Imaging: Technology and Applications 2007, 2007, Beijing, China

Abstract

A great deal segmented mirror errors consisting of piston and tip-tilt exist when space large aperture segmented optics system deploys. These errors will result in the departure of segmented mirrors images from the view. For that, proper scanning function should be adopted to control actuators rotating the segmented mirror, so that the images of segmented mirror can be put into the view and placed in the ideal position. The key of capturing segmented mirror images is selecting an optimal scanning function. This paper put forward the optimal scanning function principle based on capturing images by the fastest velocity. The scanning functions, such as screw-type, rose-type, and helianthus-type and so on, have their own merits and demerits. In my paper, the scanning functions above will be analyzed and discussed. As a sample, a simulation experiment is carried to study the effects of different scanning functions on three mirror astigmatism system, whose primary mirror with six segmented mirror. In simulation experiment, the piston and tip-tilt errors scale and the ideal position of segmented mirror are given, three scanning functions above are used to realize the capture process by utilizing the improved optics design software ZEMAX, the relationship between scanning functions and optical system are analyzed and the optimal one is determined.

Citation Download Citation

Xiaofang Zhang, Xin Yu, Xia Wang, Jiaguo Liu, and Kui Yang "Optimal scanning function for capturing segmented mirror in space optics system", Proc. SPIE 6622, International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology, 662214 (22 February 2008); https://doi.org/10.1117/12.790820

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KEYWORDS

Segmented mirrors

Image segmentation

Mirrors

Sensors

Astronomical imaging

Error analysis

Actuators

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