Design of solar-blind ultraviolet warning optical system with large FOV and large relative aperture

Parameter	Proposed	Ref. [4]	Ref. [5]	Ref. [6]	Ref. [7]
Spectrum/nm	255-275	240-280	240-280	260-270	254-272
FOV/(°)	130	8	60	10	120
Focal lenth/mm	9	150	34	100	6.95
Relative aperture	1.5∶1	1∶3	1∶3	1∶2	1∶2
Nyquist frequency	4	20	21.3	10	-
MTF	>0.36	>0.7	-	>0.4	-
Number of lenses	8	5	5	6	7
Material	Silica	Silica, CAF2	Silica, CAF2	Silica, CAF2	Silica, CAF2
Surface shape	Sphere	Sphere	2 asphere,1 binary	Sphere	-

Table 2. [in Chinese]

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Table 2. [in Chinese]

Parameter	Design requirements
Spectrum/μm	0.255-0.275
Aperture/mm	≥6
FOV/(°)	≥130
Overall length/mm	≤110
BFL（including detector window）/mm	≥7.5
Transmittance (without filter)	≥0.92
MTF/lp·mm⁻¹	≥0.3@4
Illumination uniformity	≤10%
RMS scattering radius/μm	<125

Table 3. [in Chinese]
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Table 3. [in Chinese]
Field/(°) 0 30 40 50 58 65
RMS radius/μm 108.3 92.6 90.7 96.6 106.8 108.2

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Guoxian Zheng, Jianchao Jiao, Yue Yu, Yun Su, Yi Tang, Wei Nian, Jianfeng Liu. Design of solar-blind ultraviolet warning optical system with large FOV and large relative aperture[J]. Infrared and Laser Engineering, 2021, 50(2): 20200260

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