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In the applications of deep-space exploration, surveillance, threat detection and high resolution investigation on the ground, space optical systems need not only both the high resolution and width of view zoom system, but also the small size, light weight, low power and fast focusing system. As the traditional mechanical zoom system requires complex and precision mechanical motion, many problems are usually caused. Thus, based on active optics, the active optical elements are applied to the imaging system, and it is proposed that the optical element curvature radius should be variable to realize the transition among the different focal lengths. According to third-order aberration theory and dimension calculation of optical system requirement, the active zoom theory is studied, and the third-order aberration equation constraints are confirmed. Then the initial construction parameters of coaxial active zoom system are achieved by solving the equations. The system is optimized with using the optical design software ZEMAX. The system consists of the static primary mirror, the secondary and third mirror with the variable curvature radius, and the plane mirror with zero-power. As two times the light is obscured by the elements in the coaxial active zoom system, the amount of the energy on the image plane will be affected. For this reason, it is proposed that the unobstructed off-axis optimization should be necessary to the coaxial system. The off-axis system design theory is studied and the off-axis active zoom system is designed.
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Keywords:
- active zoom /
- third-order aberrations /
- three mirrors /
- optical design
[1] Restaino, Wick D V, Martinez T, Payne D M, Gilbreath G C 2004 Proceedings of SPIE Bellingham, WA, October 20, 2004 p5491
[2] [3] Dong W H, Xie Y J, Li E L 2010 Appl. Opt. 31 893 (in Chinese) [董伟辉, 谢永军, 李恩玲 2010 应用光学 31 893]
[4] Zhang Y 2012 Ph. D. Dissertation (Changchun: Chang- chun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences) (in Chinese) [张鹰 2012 博士学位论文 (长春: 中国科学院长春光学精密机械与物理研究所)]
[5] [6] [7] Jungwirth M E L, Wick D V, Dereniak E L 2012 Opt. Eng. 51 083001
[8] [9] Wick D V, Martinez T 2004 Opt. Eng. 43 8
[10] Wick D V, Martinez T, Payne D M, Sweatt W C, Restaino S R 2005 Proc. of SPIE Bellingham, WA June 22, 2005 p151
[11] [12] Seidl K, Knobbe J, Grger H 2009 Appl. Opt. 48 4097
[13] [14] [15] Hu S L, Zhao X, Dong W H, Xie Y J 2011 Opt. Eng. 50 113001
[16] [17] Shi G W 2011 Ph. D. Dissertation (Changchun: Chang- chun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences) (in Chinese) [史广维 2011 博士学位论文 (长春: 中国科学院长春光学精密机械与物理研究所)]
[18] [19] Yang X J, Wang Z Q, Mu G G, Fu R L 2005 Acta Photon. Sin. 34 1658 (in Chinese) [杨新军, 王肇圻, 母国光, 傅汝廉 2005 光子学报 34 1658]
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[1] Restaino, Wick D V, Martinez T, Payne D M, Gilbreath G C 2004 Proceedings of SPIE Bellingham, WA, October 20, 2004 p5491
[2] [3] Dong W H, Xie Y J, Li E L 2010 Appl. Opt. 31 893 (in Chinese) [董伟辉, 谢永军, 李恩玲 2010 应用光学 31 893]
[4] Zhang Y 2012 Ph. D. Dissertation (Changchun: Chang- chun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences) (in Chinese) [张鹰 2012 博士学位论文 (长春: 中国科学院长春光学精密机械与物理研究所)]
[5] [6] [7] Jungwirth M E L, Wick D V, Dereniak E L 2012 Opt. Eng. 51 083001
[8] [9] Wick D V, Martinez T 2004 Opt. Eng. 43 8
[10] Wick D V, Martinez T, Payne D M, Sweatt W C, Restaino S R 2005 Proc. of SPIE Bellingham, WA June 22, 2005 p151
[11] [12] Seidl K, Knobbe J, Grger H 2009 Appl. Opt. 48 4097
[13] [14] [15] Hu S L, Zhao X, Dong W H, Xie Y J 2011 Opt. Eng. 50 113001
[16] [17] Shi G W 2011 Ph. D. Dissertation (Changchun: Chang- chun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences) (in Chinese) [史广维 2011 博士学位论文 (长春: 中国科学院长春光学精密机械与物理研究所)]
[18] [19] Yang X J, Wang Z Q, Mu G G, Fu R L 2005 Acta Photon. Sin. 34 1658 (in Chinese) [杨新军, 王肇圻, 母国光, 傅汝廉 2005 光子学报 34 1658]
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