Infrared and Laser Engineering, Volume. 49, Issue 8, 20200005(2020)
Design of the freeform imaging system with large field of view and large relative aperture
In recent years, freeform surfaces have been used increasingly in off-axis reflective imaging systems with high performance levels. In this paper, the cooled off-axis reflection optical system with both a large FOV(field-of-view) and a large relative aperture was designed based on the initial structure from vector aberration theory and genetic algorithm, by using a biased input field and an offset aperture stop, utilizing freeform surfaces described byXY polynomials to increase degrees of freedom to correct off-axis aberrations. The working band of the system was LWIR(long wavelength infrared) 8-12 μm, the focal length was 400 mm, the F-number was 2, the FOV was
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Bingxu Chen, Zhiyuan Liao, Chao Cao, Yu Bai, Da Mu. Design of the freeform imaging system with large field of view and large relative aperture[J]. Infrared and Laser Engineering, 2020, 49(8): 20200005
Category: 光学设计
Received: Jan. 25, 2020
Accepted: --
Published Online: Dec. 31, 2020
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