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Frontiers of Information Technology & Electronic Engineering
ISSN 2095-9184 (print), ISSN 2095-9230 (online)
2020 Vol.21 No.6 P.884-902
Development of space-based diffractive telescopes
Abstract: Membrane diffractive optical elements formed by fabricating microstructures on the substrates have two important characteristics, ultra-light mass (surface mass density < 0.1 kg/m2) and loose surface shape tolerances (surface accuracy requirements are on the order of magnitude of centimeter). Large-aperture telescopes using a membrane diffractive optical element as the primary lens have super large aperture, light weight, and low cost at launch. In this paper, the research and development on space-based diffractive telescopes are classified and summarized. First, the imaging theory and the configuration of diffractive-optics telescopes are discussed. Then, the developments in diffractive telescopes are introduced. Finally, the development prospects for this technology used as a high-resolution space reconnaissance system in the future are summarized, and the critical and relevant work that China should carry out is put forward.
Key words: Membrane diffractive optical elements, Diffractive telescope, Super large aperture
1长春理工大学理学院，中国长春市，130022
2东北师范大学物理学院，中国长春市，130024
3吉林警察学院，中国长春市，130117
4中国科学院西安光学精密机械研究所光谱成像技术重点实验室，中国西安市，710119
5中国科学院长春光学精密机械与物理研究所，中国长春市，130024
摘要：基底微结构制作的薄膜衍射光学元件具备超轻质量（面密度小于0.1 kg/m2）和宽松表面形状公差（厘米级表面精度需求）两个重要特性，将其作为大口径望远镜的主镜可实现超大口径，超轻量化，同时降低发射成本。本文对国内外基于衍射光学的空间大口径望远系统的研究进展进行归纳和总结。首先阐述衍射望远系统的成像理论与组成结构，然后介绍衍射望远系统研究进展，最后总结衍射技术作为未来高分辨率空间侦查系统的发展趋势，提出我国应着重开展的相关工作。
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DOI:
10.1631/FITEE.1900529
CLC number:
O439
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On-line Access:
2020-06-12
Received:
2019-09-28
Revision Accepted:
2020-02-24
Crosschecked:
2020-03-17