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27 March 2022 Design of small f-number off-axis three-mirror optical system
Yiting Li, Shitao Wang, Xiaoxiao Lai, Jun Chang
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Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 121697A (2022) https://doi.org/10.1117/12.2624986
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China
Abstract
Small F-number optical system often used in night vision devices. However, in some extreme cases, the common transmission optical system has a certain energy loss and the signal-to-noise ratio of the system is insufficient. In this paper, we design an off-axis three-mirror optical system, which F-number is 1.5, the focal length is 250mm, the field of view is 6°. Considering to reduce the difficulty of processing and adjusting, the primary mirror and third mirror are put on the same lens substrate. The result shows that in a relatively loose tolerance, the MTF of the system is higher than 0.6 at 40 line pairs, which has good imaging quality and meets the design requirements.
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Yiting Li, Shitao Wang, Xiaoxiao Lai, and Jun Chang "Design of small f-number off-axis three-mirror optical system", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 121697A (27 March 2022); https://doi.org/10.1117/12.2624986
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KEYWORDS
Imaging systems
Night vision
Optical design
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