All-aluminum high-resolution camera with lightweight and compact size

光学系统型式	结构特点
同轴RC+补偿组	结构尺寸小且简单、重量轻，视场大于1°，畸变小，像质较优良，装调难度适中，光学长度约为焦距的0.4～0.2倍
同轴三反TMC	结构尺寸小、重量较轻，视场约为1°～3°，畸变较小，像质优良，装调难度大，光学长度约为焦距的0.4～0.2倍
离轴三反Rug-TMA	结构较大、重量较轻，视场为3°，畸变较大，像质优良，装调难度大，光学长度约为焦距的0.33～0.27倍

Table 2. Optical design results of all-aluminum high resolution camera with lightweight and compact size

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Table 2. Optical design results of all-aluminum high resolution camera with lightweight and compact size

指标	波段范围 /nm	像元分辨率GSD/m	光学焦距 /mm	F#	成像幅宽 /km	视场
参数	450~800	3.48	460	5.6	15×15 (@500 km)	Φ2.5°

Table 3. Stability tolerances of the optical system

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Table 3. Stability tolerances of the optical system

指标	X向偏心（μm）	Y向偏心（μm）	Z向位置公差（μm）	绕X轴倾角（″）	绕Y轴倾角（″）	绕Z轴倾角（″）
主镜	±1.5	±1.5	±2	±1	±1	±5
次镜	±1	±1	±4	±2	±2	±20
三镜	±5	±5	±10	±3	±3	±20
透镜1	±5	±5	±10	±2.5	±2.5	±20
透镜2	±6	±6	±10	±3	±3	±20
透镜3	±10	±10	±15	±3.5	±3.5	±20

Table 4. Static and dynamic analysis results of the camera

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Table 4. Static and dynamic analysis results of the camera

整机仿真			X向（nm）	Y向（nm）	Z向（nm）
主镜	重力变形	面型（RMS）	5.222	5.222	1.939
	重力变形	角位移	0.151″	0.151″	0.009″
	温度变形		1.396
次镜	重力变形	面型（RMS）	1.557	1.587	0.036
	重力变形	角位移	0.578″	0.601″	0.012″
	温度变形		0.741
整机模态			302.92 Hz（一阶）

Table 5. Each component's temperature under low temperature on the behavior of sun-tracking
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Table 5. Each component's temperature under low temperature on the behavior of sun-tracking
序号组件名称温度/°C
1 主镜组件 20.4
2 次镜组件 20.1
3 补偿镜筒 20.7
4 尾罩 16.9~21.1

Table 6. Mechanical vibration test conditions of the camera

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Table 6. Mechanical vibration test conditions of the camera

正弦振动
名称	频率范围（Hz）	试验量级
正弦X/Y/Z	5~8	4.08 mm（O-P）
正弦X/Y/Z	8~100	1.05 g
扫描率		4.0 oct/min
随机振动
名称	频率范围（Hz）	功率谱密度	总均方根加速度值
X/Y/Z	20~150	+3 dB/oct	5.02 g
	150~600	0.01 g²/Hz
	600~1100	0.02 g²/Hz
	1100~2000	−6 dB/oct

Table 7. Wavefront aberration results of the camera
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Table 7. Wavefront aberration results of the camera
视场波像差（RMS）
中心视场 λ/15.6
左视场 λ/14
右视场 λ/12.9
上视场 λ/12.3
中下视场 λ/14.7

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Jing-xu SUN, Hong-bo XIE, Shu-xian LI, Xin-wang XIE, Shuo WANG, Feng ZHOU. All-aluminum high-resolution camera with lightweight and compact size[J]. Chinese Optics, 2023, 16(6): 1450

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Paper Information

Category: Original Article

Received: Apr. 12, 2023

Accepted: --

Published Online: Nov. 29, 2023

The Author Email:

DOI:10.37188/CO.2023-0062

Topics

Table 1. Comparison of types and characteristics for common optical systems

Table 1. Comparison of types and characteristics for common optical systems

Table 2. Optical design results of all-aluminum high resolution camera with lightweight and compact size

Table 2. Optical design results of all-aluminum high resolution camera with lightweight and compact size

Table 3. Stability tolerances of the optical system

Table 3. Stability tolerances of the optical system

Table 4. Static and dynamic analysis results of the camera

Table 4. Static and dynamic analysis results of the camera

Table 5. Each component's temperature under low temperature on the behavior of sun-tracking

Table 5. Each component's temperature under low temperature on the behavior of sun-tracking

Table 6. Mechanical vibration test conditions of the camera

Table 6. Mechanical vibration test conditions of the camera

Table 7. Wavefront aberration results of the camera

Table 7. Wavefront aberration results of the camera