365赌球

张坤; 李京宸; 孙思; 谌庆荣; 杨帆

doi:10.37188/CO.2023-0098

365赌球

doi: 10.37188/CO.2023-0098

张坤 ^1,,
李京宸 ^{1, 2},
孙思 ^1,,,
谌庆荣 ¹,
杨帆 ¹

1.
中国科学院光电技术研究所, 四川成都 610209
2.
中国科学院光场调控科学技术全国重点实验室, 四川成都 610209

基金项目:四川省自然科学基金（No. 2023NSFSC1308；No. 2023NSFSC0491），四川省重点研发项目（No. 2022YFG0249），中国科学院光电技术研究所前沿布点项目（No. C21K003）

详细信息

作者简介:
张坤(1993—)，男，四川成都人，博士，助理研究员，2016年于西华大学获得学士学位，2021年于中国科学院长春光学精密机械与物理研究所获得工学博士学位，现为中国科学院光电技术研究所助理研究员，主要从事光学遥感成像系统设计方面的研究。E-mail： [email protected]

中图分类号:140.3060；
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- 网络出版日期: 2023-11-06

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ZHANG Kun ^{1
,},
LI Jing-chen ^{1, 2},
SUN Si ^{1
,,},
CHEN Qing-rong ¹,
YANG Fan ¹

1.
Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
2.
National Key Laboratory of Optical Field Manipulation Science and Technology, Chinese Academy of Sciences, Chengdu 610209, China

Funds:Supported by Natural Science Foundation of Sichuan Province (No. 2023NSFSC1308; No. 2023NSFSC0491), Key Research and Development Project of Sichuan Province (No. 2022YFG0249), Cutting-edge Distribution Program of Institute of Optics and Electronics Chinese Academy Sciences (No. C21K003)

More Information

Corresponding author: [email protected]

摘要

摘要:
针对现有多波段成像系统体积大、功耗高和集成化设计困难的问题，本文提出了一种基于单传感器的三波段共口径成像光学系统的设计方法。首先，在光学系统的光阑处设计1×2多波段透镜阵列，把可见光波段和短波红外波段同时成像在一个像平面上，并把两个波段中心波长的成像位置偏差控制在一个像元内以实现双波段融合成像。然后，针对双波段成像衍射极限不同的问题，提出分通道透镜阵列的离轴偏移量和通光口径大小联合优化的方法，并采用双电动光阑高速控制三个成像通道的切换速度。最后，设计了一个基于单传感器的焦距为30 mm，工作波段分别为480~900 nm、900~1700 nm和480~1700 nm的三波段共口径光学系统，设计及分析结果表明该系统具有成像质量好、结构紧凑、无运动光学元件、成像波段切换速度快等优点。
- 单传感器 /
- 透镜阵列 /
- 多波段成像系统 /
- 光学设计
Abstract:
The existing multi-band imaging system poses issues of large volume, high power consumption, and difficulty in integrating design. To address these challenges, we proposed a solution in the form of a design methodology for a single sensor based three-band co-aperture imaging optical system. First, a 1×2 multi-band lens array in the aperture stop of the optical system is designed. This array effectively captures both the visible and short-wave infrared bands simultaneously in a single image plane. In addition, the imaging position deviation of the center wavelength of both bands are controlled to within one pixel, resulting in dual-band fusion imaging. To address the issue of different diffraction limits in multi-band imaging, we propose to use the joint optimization method to simultaneously control the off-axis offset and aperture size of the split channel lens array. In addition, we suggest utilizing a dual electric diaphragm to control the switching speed of the three imaging channels. Finally, a single sensor based three-band co-aperture optical system with a focal length of 30 mm and operating bands ranging from 480 to 900 nm, from 900 to 1700 nm, and from 480 to 1700 nm is designed. The system exhibits multiple advantages, such as excellent imaging quality, a compact structure, no moving optical elements, and a rapid switching speed of the imaging band, as indicated by the design and analysis results.
- single sensor /
- lens array /
- multi-band imaging system /
- optical design

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图 1 基于单传感器的三波段共口径光学系统的成像原理图

Figure 1. Imaging schematic diagram of a single sensor based three-band co-aperture optical system

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图 2 三波段共口径光学系统设计流程图

Figure 2. Design flow chart of a three-band co-aperture optical system

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图 3 三波段共口径成像光学系统

Figure 3. Three-band co-aperture optical system

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图 4 调制传递函数曲线图

Figure 4. Schematic diagram of modulation transfer function curves

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图 5 光学系统的点列图

Figure 5. Spot diagram of the optical system

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图 6 畸变曲线图

Figure 6. Diagram of distortion curves

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图 7 1 300 nm与660 nm的成像位置偏差图

Figure 7. Schematic diagram of imaging position deviation curves for 1 300 nm and 660 nm

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图 8 蒙特卡洛分析概率图

Figure 8. Probability of Monte Carlo analysis

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表 1 三波段光学系统的设计指标要求

Table 1. Design specifications of the three-band optical system

参数	数值
焦距/mm	30
工作谱段1/nm	480~900
工作谱段2/nm	900~1700
工作谱段3/nm	480~1700
F数 (480~900 nm)	5.0
F数 (900~1700 nm)	3.0
视场2ω/(°)	16
畸变/%	≤0.8
MTF（@100 lp/mm）	≥0.20

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表 2 光学系统公差分配表

Table 2. Tolerance distribution of optical system

公差项	数值
光圈/fringe	≤2
元件厚度/mm	±0.02
表面偏心/mm	±0.01
元件倾斜/(°)	±0.01
元件偏心/mm	±0.01
表面不规则度/fringe	≤0.2
折射率	±0.001
阿贝数/%	±0.3

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表 3 光学系统的敏感公差

Table 3. Sensitivity tolerances of optical system

480~900 nm		900~1 700 nm
敏感公差项	MTF变化	敏感公差项	MTF变化
透镜6阿贝数	−0.043	透镜6折射率	−0.047
透镜5折射率	−0.043	透镜5折射率	−0.046
透镜6折射率	−0.035	透镜2偏心	−0.046
透镜1与2间隔	−0.031	透镜1与2间隔	−0.046
透镜9与10间隔	−0.030	透镜1偏心	−0.039
透镜1厚度	−0.027	透镜1厚度	−0.038
透镜2阿贝数	−0.026	透镜2表面偏心	−0.037

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