Pang Zhihai, Fan Xuewu, Zou Gangyi, Zhao Hui. Design of new wide-angle unobscured three-mirror optical system[J]. Infrared and Laser Engineering, 2013, 42(9): 2449-2452.
| Citation:
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Pang Zhihai, Fan Xuewu, Zou Gangyi, Zhao Hui. Design of new wide-angle unobscured three-mirror optical system[J]. Infrared and Laser Engineering, 2013, 42(9): 2449-2452.
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Design of new wide-angle unobscured three-mirror optical system
- 1.
Space Optics Laboratory,Xi'an Institute of Optics and Precision Mechanics,Chinese Academy of Science,Xi'an 710119,China;
- 2.
University of Chinese Academy of Science,Beijing 100049,China
- Received Date: 2013-01-10
- Rev Recd Date:
2013-02-15
- Publish Date:
2013-09-25
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Abstract
For the disadvantage of conventional three mirrors system to achieve wide field of view, a new-style unobscured three-mirror optical system with wide field of view was designed based on the retrofocus-type objective configuration. One powerful retrofocus design approach was the combination with a reversed Galilean Telescope, the expression of initial configuration parameters was obtained and the unobscured style was carried out by decenter the field. A system with effective focal length of 100 mm, field of view of 2020 and F-number of 5 was designed, the modulation transfer function value at spatial frequency of 50 lp/mm was over 0.6 and image qualities were excellent. Compared with traditional common three-mirror optical systems, the most prominent advantage of this new three-mirror system are that it can provide wide field of view and just use two aspheric mirrors and one spherical, so that the cost of this system will be reduced.
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