Design of compact off-axis triple mirror optical system

指标项	参数值
焦距	800 mm
入瞳直径	200 mm
F数	4
光谱范围	0.486~0.656 μm，0.78~2.5 μm，3~5 μm
视场	12°×6°
像元尺寸	可见光通道为3 μm，近红外通道为5 μm，中红外通道为17 μm
成像要求	可见光MTF(@160 lp/mm＞0.2) 近红外MTF(@100 lp/mm＞0.2) 中红外MTF(@30 lp/mm＞0.2)

Table 2. Initial structure parameter
View table
View in Article
Table 2. Initial structure parameter
曲率半径/mm 厚度圆锥系数
主镜 −1641.935 −330 −4.118
次镜 −550.510 330 −0.919
三镜 −828.318 −730.4 0

Table 3. Tilt and eccentricity of the initial structure
View table
View in Article
Table 3. Tilt and eccentricity of the initial structure
项目倾斜X/倾斜Y 偏心X/偏心Y
主镜 ±18.4° ±800
次镜 ±45° ±565
三镜 ±45° ±1600

Table 4. Zernike standard free-form surface coefficient table

View table

View in Article

Table 4. Zernike standard free-form surface coefficient table

项目	Z1	Z2	Z3	Z4	Z5	Z6	Z7
	−74.798	−1.701×10⁻⁵	10.674	0.164	−4.348×10^-7	0.017	2.38×10^-3
	Z8	Z9	Z10	Z11	Z12	Z13	Z14
三镜	−2.385×10⁻⁸	−1.049×10⁻⁴	−5.268×10⁻⁸	−2.277×10⁻⁵	−1.079×10⁻⁵	7.318×10⁻⁹	3.574×10⁻⁷
	Z15	Z16	Z17	Z18	Z19	Z20
	3.034×10⁻⁹	5.154×10⁻¹¹	7.969×10⁻⁷	7.156×10⁻¹⁰	8.6×10⁻⁹	8.421×10⁻¹⁰

Table 5. Error distribution table

View table

View in Article

Table 5. Error distribution table

公差类别	公差项目	主镜	次镜	三镜
装调误差	X方向偏轴/mm	0.05	0.2	0
	Y方向偏轴/mm	0.05	0.2	0
	X方向倾斜/(°)	0.005	0.001	0
	Y方向倾斜/(°)	0.005	0.001	0
面型误差	曲率半径/mm	0.2	0.2	0.2
面型误差	波峰到波谷(PV值)/ $μ m$	0.5	0.5	0.2

Table 6. Monte Carlo cumulative probability statistic
View table
View in Article
Table 6. Monte Carlo cumulative probability statistic
累积概率/% 弥散斑RMS/mm MTF
90 0.00476342 0.11910409
80 0.00455730 0.15766662
50 0.00396765 0.18865949
20 0.00323214 0.23130557
10 0.00308628 0.24853763

Tools

Get Citation

Copy Citation Text

Chengbin Jiang, Zhili Chen, Xiaotong Wang, Yuan Zhang, Shanshan Cheng. Design of compact off-axis triple mirror optical system[J]. Opto-Electronic Engineering, 2024, 50(12): 230231-1

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites