Volume 12 Issue 6
Dec.  2019
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ZHAO Wei, LIU Hua, LU Zi-feng, LU Zhen-wu, WANG Xin. Initial structure of large aperture diffractive telescope[J]. Chinese Optics, 2019, 12(6): 1395-1402. doi: 10.3788/CO.20191206.1395
Citation: ZHAO Wei, LIU Hua, LU Zi-feng, LU Zhen-wu, WANG Xin. Initial structure of large aperture diffractive telescope[J]. Chinese Optics, 2019, 12(6): 1395-1402. doi: 10.3788/CO.20191206.1395

Initial structure of large aperture diffractive telescope

doi: 10.3788/CO.20191206.1395

National Natural Science Foundation of China 11874091

Opening Foundation of Key Laboratory of Spectral Imaging Technology 

Natural Science Foundation of Jilin Province 20180101031JC

More Information
  • Corresponding author: LIU Hua, E-mail:liuhua_rain@aliyun.com
  • Received Date: 11 Jun 2018
  • Rev Recd Date: 13 Jul 2018
  • Publish Date: 01 Dec 2019
  • When taking the film diffractive optical elements as main lens, large aperture diffractive telescope has the characteristics such as low mass density(surface mass density can reach 0.1 kg/m2), loose surface shape tolerance(surface accuracy requirements are the magnitude of centimeter) and low launch costs. In this paper, the imaging theory and the configuration of diffractive telescope are discussed. Then, the calculation process of the initial structure of this optical system is derived. A prototype system with 300-mm aperture, 2-m focal length and working wavelength from 0.58 μm to 0.68 μm is designed and star image test and resolution board test are carried out. The test result of star image is close to diffraction limit, which is agree well with the design result. The work in this paper can provide theory foundation and initial model for diffractive telescope designer, and can help them to reduce design time and increase imaging quality.


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