Compound diffractive telescope system: design, straylight analysis, and optical test

doi:10.1088/1674-1056/19/1/010702

Abstract The compound diffractive telescope is a novel space optical system which combines the structure of compound eyes with diffractive optics and so it has a lighter weight, a wider field of view (FOV), a lower cost as well as looser fabrication tolerance. In this paper, the design of a compound diffractive telescope composed of one primary lens and twenty-one eyepieces is introduced. Then the influence of diffraction orders on the performance of the system is analysed. A modified phase function model of diffractive optics is proposed to analyse the modulation transfer function (MTF) curves for 0℃ FOV, which provides a more accurate prediction of the performance of the system. In addition, an optimized mechanism is also proposed to suppress stray light. The star image and resolution tests show that the system can achieve diffraction limit imaging within ± 2℃ of FOV and ±4 mm of eccentricity. Finally, a series of pictures of an object are taken from different channels, and the splicing of pictures from adjacent FOVs is demonstrated. In summary, the designed system has been proved to have great potential applications.

Keywords: lens system design compound eyes structure diffractive lens stray light

Received: 27 February 2009
Revised: 08 July 2009
Accepted manuscript online:

PACS:	07.60.-j	(Optical instruments and equipment)
	42.30.Lr	(Modulation and optical transfer functions)
	42.79.-e	(Optical elements, devices, and systems)

Fund: Project supported by the National High Technology Research and Development Program of China (Grant No. 2006AA12Z127), the National Natural Science Foundation of China (Grant No. 10704072) and the Innovation Program of Chinese Academy of Sciences.

Cite this article:

Yue Jin-Ying(岳巾英), Liu Hua(刘华), Lu Zhen-Wu(卢振武), Xu Wen-Bin(许文斌),Zhang Hu(张虎), Zhang Hong-Xin(张红鑫), and Liu Ying(刘英) Compound diffractive telescope system: design, straylight analysis, and optical test 2010 Chin. Phys. B 19 010702

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Compound diffractive telescope system: design, straylight analysis, and optical test

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