Optical system design of night vision goggles with large field of view and low illumination

Table 1. Design parameters of objective optical system
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Table 1. Design parameters of objective optical system
参数视场角/（°）焦距/mm F数波长/nm 放大倍数
指标 74.46 3.75 1.2 487～950 1

Table 2. Design requirements of eyepiece optical system

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Table 2. Design requirements of eyepiece optical system

参数	数值
波长/nm	487～950
出瞳直径/mm	7
视场角/（°）	74.46
最大畸变/%	<−7.14
出瞳距离/mm	15
总长/mm	<78.86
中心视场MTF	>0.9 @14lp/mm
	>0.8 @21lp/mm
边缘视场MTF	>0.4 @14lp/mm
	>0.1 @21lp/mm

Table 3. Material parameters of optical system lens
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Table 3. Material parameters of optical system lens
序号材料折射率阿贝常数密度/(g·cm⁻³)
透镜1 ZF11 1.699 30.05 4.06
透镜2 H-LAK3 1.747 50.95 4.08
透镜3 H-LAK3 1.747 50.95 4.08
透镜4 H-Q50 1.581 40.89 2.60

Table 4. Optical system aspheric parameters
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Table 4. Optical system aspheric parameters
面圆锥系数二阶 4阶 6阶
S₄ −3.7551 0 7.10937e-06 −4.2856e-09

Table 5. Spot diagram of optical system
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Table 5. Spot diagram of optical system
视场点[物面/ mm，像面/mm] 弥散斑 RMS/μm GEO/μm
[0.00,0.000] 6.779 13.600
[18,14.622] 19.696 49.719
[35,29.900] 26.167 57.350

Table 6. Monte Carlo analysis results
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Table 6. Monte Carlo analysis results
蒙特卡罗分析 MTF
>90% 0.3478
>80% 0.3857
>50% 0.4604
>20% 0.5023
>10% 0.5108

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Yong ZHANG, Weiping LIU, Sasa MA, Zhiwei LI, Bin ZHOU. Optical system design of night vision goggles with large field of view and low illumination[J]. Journal of Applied Optics, 2023, 44(3): 636

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