Design of 0.40-2.50 μm Wide-Band Optical System Based on Harmonic Diffraction Theory

Zhendong Wang; Huan Liu; Yang Chen; Yongqiang Pan; Wanpeng Xie; Jun Han

doi:10.3788/LOP202259.1922002

Laser & Optoelectronics Progress, Volume. 59, Issue 19, 1922002(2022)

Design of 0.40-2.50 μm Wide-Band Optical System Based on Harmonic Diffraction Theory

Zhendong Wang, Huan Liu, Yang Chen, Yongqiang Pan, Wanpeng Xie, and Jun Han^*

Author Affiliations

School of Armament Science and Technology, Xi'an Technological University, Xi'an 710021, Shaanxi, China

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Figures & Tables(12)

Fig. 1. Structure of the HDOE. (a) Single-layer HDOE; (b) double-layer HDOE

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$Bandwidth-integrated average diffraction efficiency of double-layer HDOE at different wavelengths$

Fig. 2. Bandwidth-integrated average diffraction efficiency of double-layer HDOE at different wavelengths

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$Diffraction efficiency curve of double-layer HDOE$

Fig. 3. Diffraction efficiency curve of double-layer HDOE

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Fig. 4. Structure of the optical system

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Fig. 5. MTF curve of the system. (a) 0.40-0.78 μm; (b) 0.78-2.50 μm

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Fig. 6. RMS spot diagram of the system under normal temperature conditions. (a) 0.40-0.78 μm; (b) 0.78-2.50 μm

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Fig. 7. Field curvature and distortion of the optical system. (a) 0.40-0.78 μm; (b) 0.78-2.50 μm

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Fig. 8. Energy diagrams of different bands. (a) 0.40-0.78 μm; (b) 0.78-2.50 μm

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$Phase diagram of binary diffraction surface. (a) First diffraction plane; (b) second diffraction plane$

Fig. 9. Phase diagram of binary diffraction surface. (a) First diffraction plane; (b) second diffraction plane

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Table 1. Design index of the optical system

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Table 1. Design index of the optical system

Parameter	Value
Wavelength /μm	0.40-0.78，0.78-2.50
Detector specifications	1280×1024
Pixel size /（μm×μm）	10×10
Focal length /mm	100
Field of view /（°）	9.4×9.4
F-number	2.8
Range of action /m	1000
Temperature range /℃	-40-60

Table 2. Tolerances of optical system

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Table 2. Tolerances of optical system

Surface tolerances		Element tolerances		Index tolerances
Parameter	Tolerances	Parameter	Tolerances	Parameter	Tolerances
Fringes	3	Decenter（X，Y）	0.03	Index	0.001
Thickness /mm	0.03	Tilt（X，Y）	1′	Abbe /%	1
Decenter（X，Y）	0.03	-	-	-	-
Tilt（X，Y）	1′	-	-	-	-

Table 3. Analysis results of the Monte Carlo method
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Table 3. Analysis results of the Monte Carlo method
Probability /% MTF at 50 lp/mm
0.40-0.78 μm 0.78-2.50 μm
90 0.44246970 0.28142165
80 0.47657467 0.30853115
50 0.57365144 0.38551730
20 0.64730762 0.48560952
10 0.68271934 0.52197625

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Zhendong Wang, Huan Liu, Yang Chen, Yongqiang Pan, Wanpeng Xie, Jun Han. Design of 0.40-2.50 μm Wide-Band Optical System Based on Harmonic Diffraction Theory[J]. Laser & Optoelectronics Progress, 2022, 59(19): 1922002

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