Diffractive pyramid wave-front sensor used for adaptive optics

Yuan Zhao; Xiaona Ding; Kun Wang; Hongyan Wei; Huan Yang; Dongmei Cai

doi:10.1117/12.977622

15 October 2012 Diffractive pyramid wave-front sensor used for adaptive optics

Yuan Zhao, Xiaona Ding, Kun Wang, Hongyan Wei, Huan Yang, Dongmei Cai

Proceedings Volume 8420, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical System Technologies for Manufacturing and Testing; 842009 (2012) https://doi.org/10.1117/12.977622
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China

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.

Citation Download Citation

Yuan Zhao, Xiaona Ding, Kun Wang, Hongyan Wei, Huan Yang, and Dongmei Cai "Diffractive pyramid wave-front sensor used for adaptive optics", Proc. SPIE 8420, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical System Technologies for Manufacturing and Testing, 842009 (15 October 2012); https://doi.org/10.1117/12.977622

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KEYWORDS

Sensors

Diffraction

Adaptive optics

Charge-coupled devices

Fabrication

Modulation

Polishing

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