Design of Ultraviolet Warning Optical System with Large Relative Aperture and Long Focal Length

Table 1. Design parameters of optical system
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Table 1. Design parameters of optical system
Parameter Value
Wavelength /nm 260-270
Focal length /mm 100
F number 2
FOV 2ω /(°) 10
Root-mean-square radiusof spot diagram /μm ≤50
Modulation transfer function(MTF) at 10 lp/mm ≥0.4

Table 2. Root-mean-square radius of spot diagram of each field of view at different temperatures

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Table 2. Root-mean-square radius of spot diagram of each field of view at different temperatures

Field ofview /(°)	Root-mean-square radius of spot diagramat different temperatures /μm
Field ofview /(°)	-10 ℃	20 ℃	40 ℃
0	36.481	25.292	39.299
2	39.342	27.128	39.125
3	42.099	28.085	38.265
4	45.077	28.349	36.178
5	48.526	28.320	32.886

Table 3. Manufacturing tolerances
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Table 3. Manufacturing tolerances
Lens N ΔN Δn Δt /mm C /mm
Lens 1 4 0.5 0.0005 ±0.05 0.02
Lens 2 4 0.5 0.0005 ±0.05 0.02
Lens 3 4 0.5 0.0005 ±0.05 0.02
Lens 4 4 0.5 0.0005 ±0.05 0.05
Lens 5 4 0.5 0.0005 ±0.05 0.02
Lens 6 4 0.5 0.0005 ±0.05 0.02

Table 4. Alignment tolerances
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Table 4. Alignment tolerances
Lens Δd /mm Decentering /mm Tilt /(')
Lens 1 ±0.05 0.02 1
Lens 2 ±0.05 0.02 1
Lens 3 ±0.05 0.02 1
Lens 4 ±0.05 0.02 1
Lens 5 ±0.05 0.02 2
Lens 6 ±0.05 0.02 2

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Guili Cao, Fangfang Liu, Yongdan Jia, Qian Zhang, Chongbin Xu. Design of Ultraviolet Warning Optical System with Large Relative Aperture and Long Focal Length[J]. Laser & Optoelectronics Progress, 2019, 56(12): 122203

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