Technology for the structure and supporting form of large aperture optic window
-
摘要: 为减小大口径光学窗口对系统入射光线的影响,提高光学窗口性能及光学系统成像质量,提出了基于普通环带支撑的中间环带辅助支撑形式,并在不同口径、径厚比及遮拦比状态下比较两种支撑方式对光学系统波前误差的影响。与普通环带支撑方式相比,采用中间环带辅助支撑形式可以降低90%的由窗口引入的波前误差,该方式对径厚比为100/1的窗口的支撑效果可以达到普通支撑方式下径厚比为100/3的窗口类似的支撑效果。因此,中间环带辅助支撑形式可以有效提高窗口支撑效率、减小窗口厚度及质量、降低窗口对入射光线的体吸收率。Abstract: In order to reduce the influence of large aperture optical window on the system's incident light and strengthen the performance of optical window and the imaging quality of the optical system, an intermediate zonal auxiliary supporting form (IZASF) based on the ordinary zonal supporting form (OZSF) is proposed in this paper. The influence of these two supporting forms on the wavefront error of optical system was compared under different caliber, thickness ratio and obscuration ratio. Compared with the ordinary zonal supporting form, the intermediate zonal auxiliary supporting form can reduce the wavefront error of the window by 90%. The wavefront error of this window with diameter-thickness ratio 100∶1 and the supporting form IZASF is similar to that of the window with diameter-thickness ratio 100∶3 and the supporting form OZSF. Therefore, the IZASF can effectively improve the supporting efficiency of window and reduce the window thickness and quality. It can also reduce absorbance of the incident light, thus it has great significance to improve the performance and expand the application environment of optical telescopes further.
-
表 1 窗口厚度为20 mm时,两种支撑方式对波前的影响
Table 1. Influence of two supporting forms on wavefront when the thickness of window is 20 mm
supporting form PV value/λ RMS/λ ordinary zonal support 0.072 0.025 intermediate auxiliary zonal support 0.002 3 0.000 77 表 2 等遮拦比状态下两种支撑方式对窗口模态的影响
Table 2. Influence on mode of two kinds of supporting forms
mode frequency response/Hz ordinary zonal supporting form intermediate zonal auxiliary supporting form 1 311 742 2 638 760 3 638 760 -
[1] 刘旭堂, 高云国. 大口径激光发射窗口拼接方法研究[J]. 光学学报, 2014, 34(10): 251-256. https://www.cnki.com.cn/Article/CJFDTOTAL-GXXB201410037.htmLiu Xutang, Gao Yunguo. Study of large-diameter laser emission window stitching program. Acta Optica Sinica, 2014, 34(10): 251-256 https://www.cnki.com.cn/Article/CJFDTOTAL-GXXB201410037.htm [2] 吕保斌, 杨利华, 马臻, 等. 光学窗口形变对光管像质影响[J]. 光电技术应用, 2009, 24(2): 13-17. doi: 10.3969/j.issn.1673-1255.2009.02.004Lü Baobin, Yang Lihua, Ma Zhen, et al. Influence of optic window deformation on collimator image quality. Electro-Optic Technology Application, 2009, 24(2): 13-17 doi: 10.3969/j.issn.1673-1255.2009.02.004 [3] 张景旭. 地基大口径望远镜系统结构技术综述[J]. 中国光学, 2012, 5(4): 327-336. doi: 10.3969/j.issn.2095-1531.2012.04.004Zhang Jingxu. Overview of structure technologies of large aperture ground-based telescopes. Chinese Optics, 2012, 5(4): 327-336 doi: 10.3969/j.issn.2095-1531.2012.04.004 [4] 陈垂昌, 赵会峰, 姜宏. 平板玻璃的可见光透过率与厚度和吸光率的关系[J]. 玻璃与搪瓷, 2014, 42(2): 1-13. https://www.cnki.com.cn/Article/CJFDTOTAL-BLTC201402001.htmChen Chuichang, Zhao Huifeng, Jiang Hong. Discuss on effect of glass absorbance on relation of visible light transmittance with glass thickness. Glass & Enamel, 2014, 42(2): 1-13 https://www.cnki.com.cn/Article/CJFDTOTAL-BLTC201402001.htm [5] 王润文, 陆培华. 高功率激光透过窗口材料的传输效应分析[J]. 强激光与粒子束, 2000, 12(z0): 91-94. http://www.hplpb.com.cn/article/id/1018Wang Runwen. Lu Peihua. Study on the effects of high-power laser light transmitted through optical window plane. High Power Laser and Particle Beams, 2000, 12(z0): 91-94 http://www.hplpb.com.cn/article/id/1018 [6] Pierre Y B. The design and construction of large optical telescopes[M]. New York: Springer, 2003. [7] 方煜, 相里斌, 吕群波, 等. 光学窗口厚度设计及变形对相机性能影响[J]. 光学学报, 2013, 33(4): 1-6. https://www.cnki.com.cn/Article/CJFDTOTAL-GXXB201304034.htmFang Yu, Xiang Libin, Lü Qunbo, et al. Design of optical window thickness and influence of its deformation on multi-spectral camera's optical performance. Acta Optica Sinica, 2013, 33(4): 1-6 https://www.cnki.com.cn/Article/CJFDTOTAL-GXXB201304034.htm [8] 孙昌峰, 张兴德, 李荣刚, 等. 光学窗口的抗震结构优化分析[J]. 红外与激光工程, 2015, 45(3): 307-310.Sun Changfeng, Zhang Xingde, Li Ronggang, et al. Anti-vibration structure optimization of the optical window. Infrared and Laser Engineering, 2015, 45(3): 307-310 [9] 张德江, 刘立人, 徐荣伟, 等. 透镜自重变形引起波相差的有限元分析[J]. 光学学报, 2005, 25(4): 538-541. https://www.cnki.com.cn/Article/CJFDTOTAL-GXXB20050400K.htmZhang Dejiang, Liu Liren, Xu Rongwei, et al. Finite element analysis for wavefront error of lenses induced by gravity. Acta Optica Sinica, 2005, 25(4): 538-541 https://www.cnki.com.cn/Article/CJFDTOTAL-GXXB20050400K.htm [10] 黎明, 吴清文, 余飞. 基于热光学分析的光学窗口玻璃厚度的优化[J]. 光学学报, 2010, 30(1): 210-213. https://www.cnki.com.cn/Article/CJFDTOTAL-GXXB201001039.htmLi Ming, Wu Qingwen, Yu Fei. Optimization of optical window glass thickness based on the thermal optical analysis. Acta Optica Sinica, 2010, 30(1): 210-213 https://www.cnki.com.cn/Article/CJFDTOTAL-GXXB201001039.htm [11] 邢振冲, 张葆, 洪永丰. 拼接式光学窗口对光学系统影响的分析方法[J]. 光学学报, 2015, 35(10): 1-10. https://www.cnki.com.cn/Article/CJFDTOTAL-GXXB201510027.htmXing Zhenchong, Zhang Bao, Hong Yongfeng. Analysis method of the effect of stitched windows on the optical systems. Acta Optica Sinica, 2015, 35(1): 1-10 https://www.cnki.com.cn/Article/CJFDTOTAL-GXXB201510027.htm [12] 张荣实. 红外窗口/整流罩技术新进展[J]. 红外与激光工程, 2007, 36(s): 114-119. https://www.cnki.com.cn/Article/CJFDTOTAL-HWYJ2007S2027.htmZhang Rongshi. Recent advances in infrared window and dome technologies. Infrared and Laser Engineering, 2007, 36(s): 114-119 https://www.cnki.com.cn/Article/CJFDTOTAL-HWYJ2007S2027.htm [13] Yoder P R, Jr. Opto-mechanical systems design[M]. Washington: CRC press, 2006: 100-104. [14] 刘旭堂. 大口径宽波段高能激光发射窗口研究[D]. 长春: 中国科学院长春光学精密机械与物理研究所, 2015: 48-56.Liu Xutang. Research on large-diameter multi-band high-energy laser emission window. Changchun: Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 2015: 48-56 [15] 谭玉凤, 王继红, 任戈, 等. 大口径轻量化主镜的温度场等效模型理论计算[J]. 强激光与粒子束, 2017, 29: 061001. doi: 10.11884/HPLPB201729.160555Tan Yufeng, Wang Jihong, Ren Ge. Equivalent analytical calculation of the temperature field of the light weighted primary mirror for large-aperture telescope. High Power Laser and Particle Beams, 2017, 29: 061001 doi: 10.11884/HPLPB201729.160555 [16] 武东城, 高松涛, 吴志会, 等. 高精度光学平板在三点支撑下自重变形的研究[J]. 光学学报, 2015, 35: 1212001. https://www.cnki.com.cn/Article/CJFDTOTAL-GXXB201512021.htmWu Dongcheng, Gao Songtao, Wu Zhihui, et al. Gravity deformation of high-precision optical flat under three-point support. Acta Optica Sinica, 2015, 35: 1212001 https://www.cnki.com.cn/Article/CJFDTOTAL-GXXB201512021.htm [17] Wang Chenjie, Chai Lenyi, Feng Liangjie, et al. Design and analysis of supporting structure between the primary mirror and the secondary mirror on a space telescope[C]//SPIE-INT Soc Optical Engineering. 2015. [18] 高波, 李瑞杰, 魏小红, 等. 关于光学元件面形评价参数峰谷值(PV)的分析[J]. 应用光学, 2010, 31(6): 1046-1049. https://www.cnki.com.cn/Article/CJFDTOTAL-YYGX201006038.htmGao Bo, Li Ruijie, Wei Xiaohong, et al. Peak-to-valley parameter of optical component. Journal of Applied Optics, 2010, 31(6): 1046-1049 https://www.cnki.com.cn/Article/CJFDTOTAL-YYGX201006038.htm