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Proceedings Paper

Diffractive pyramid wave-front sensor used for adaptive optics
Author(s): Yuan Zhao; Xiaona Ding; Kun Wang; Hongyan Wei; Huan Yang; Dongmei Cai
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Paper Abstract

Wave-front sensor, as the main component of Adaptive optics system, detects light from the astronomic object or reference sources. It aims to improve the utilization of light, especially for AO system work with the faint objects. Compared with Shack-Hartmann sensor, pyramid wave-front sensor is a relatively new one with increased pupil sampling and spatial resolution. Pyramid wave-front sensor uses a refractive element (the pyramid) to produce four images of the entrance pupil. Usually, Single pyramid prototypes are made using the classical figuring and polishing techniques. This approach, however, is not only very time consuming but also does not guarantee a uniform repeatability of the optical characteristics of the pyramids. The loss of low frequency component increases due to the roofs existing on its vertexes. Moreover, stray light is introduced in the four images. We therefore are investigating a modified pyramidal optical components based on the binary optical concept. In this article we describe the diffractive pyramid prototypes using the micro fabrication technique. The parameters of the pyramid are discussed.

Paper Details

Date Published: 15 October 2012
PDF: 7 pages
Proc. SPIE 8420, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical System Technologies for Manufacturing and Testing, 842009 (15 October 2012); doi: 10.1117/12.977622
Show Author Affiliations
Yuan Zhao, Taiyuan Univ. of Science and Technology (China)
Xiaona Ding, Taiyuan Univ. of Science and Technology (China)
Kun Wang, Taiyuan Univ. of Science and Technology (China)
Hongyan Wei, Taiyuan Univ. of Science and Technology (China)
Huan Yang, Institute of Optics and Electronics (China)
Dongmei Cai, Taiyuan Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 8420:
6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical System Technologies for Manufacturing and Testing
Xiangdi Lin; Yoshiharu Namba; Tingwen Xing, Editor(s)

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