Optimal Design and Application of Double-Layer Diffractive Optical Element over Wide Temperature Range

Shan Mao; Tao Lai; Huaile Nie; Yufeng Tang; Yichen Song; Jianlin Zhao

doi:10.3788/AOS221894

Acta Optica Sinica, Volume. 43, Issue 8, 0822026(2023)

Optimal Design and Application of Double-Layer Diffractive Optical Element over Wide Temperature Range

Shan Mao^1,2、*, Tao Lai^1,2, Huaile Nie^1,2, Yufeng Tang^1,2, Yichen Song^1,2, and Jianlin Zhao^1,2、**

¹Key Laboratory of Light-Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, Shaanxi , China

²Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, Shaanxi , China

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Figures & Tables(12)

Fig. 1. Micro-structure heights changing with environment temperature change

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$Influence of ambient temperature on diffraction efficiency of double-layer DOE based on traditional design. (a) Diffraction efficiency varying with wavelength and temperature; (b) BIADE varying with temperature$

Fig. 2. Influence of ambient temperature on diffraction efficiency of double-layer DOE based on traditional design. (a) Diffraction efficiency varying with wavelength and temperature; (b) BIADE varying with temperature

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$Influence of incident wavelength on diffraction characteristics under ambient temperature of -20-60 ℃$

Fig. 3. Influence of incident wavelength on diffraction characteristics under ambient temperature of -20-60 ℃

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$Influence of ambient temperature on diffraction efficiency of double-layer DOE based on optimized design. (a) Diffraction efficiency varying with wavelength and temperature; (b) BIADE varying with temperature$

Fig. 4. Influence of ambient temperature on diffraction efficiency of double-layer DOE based on optimized design. (a) Diffraction efficiency varying with wavelength and temperature; (b) BIADE varying with temperature

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Fig. 5. Athermalization design results of mid-infrared waveband hybrid imaging optical system containing double-layer DOE

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Fig. 6. MTF of middle infrared hybrid imaging optical system at different temperatures. (a) 20 ℃; (b) -20 ℃; (c) 60 ℃

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Fig. 7. Minimum MTF of hybrid imaging optical system at cutoff frequency. (a) TBIADE under two designs; (b) effect of TBIADE on MTF

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Table 1. Design results of double-layer DOE based on BIADE
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Table 1. Design results of double-layer DOE based on BIADE
Substrate material ZnSe Ge
Diffraction order 107 -106
Micro-structure heights H₁ and H₂ / μm 325.212 -152.689

Table 2. Design results of double-layer DOE under ambient temperature of -20-60 ℃
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Table 2. Design results of double-layer DOE under ambient temperature of -20-60 ℃
Index Value
Ambient temperature /℃ -20-60
Design wavelength pair /μm 3.0 and 3.42
TBIADE /% 95.96
Design order ZnSe 64
Ge -63
H₁ /μm ZnSe 153.323
H₂ /μm Ge -71.416

Table 3. Athermalization design specifications of mid-infrared waveband hybrid imaging optical system

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Table 3. Athermalization design specifications of mid-infrared waveband hybrid imaging optical system

Index	Value
Working waveband /μm	3-5
Field of view /（°）	2ω=4°
Effective focal length /mm	100
Entrance pupil /mm	150
F number	1.25
Mechanical construction material	AL100（ $α_{b} = 23.6 \times 10^{- 6}$ ）
Temperature range /℃	-20-60
Total length /mm	≤150
MTF@17 lp·mm^-1	>0.5 @ 3-5 μm

Table 4. Structure parameters of mid-infrared waveband hybrid imaging optical system with double-layer DOE

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Table 4. Structure parameters of mid-infrared waveband hybrid imaging optical system with double-layer DOE

Surface type		Radius /mm	Thickness /mm	Glass
0	Standard（object）	Infinity	Infinity	Air
1	Standard	108.177	11.466	ZnSe
2	Standard	93.731	7.391	Air
3	Standard	131.858	11.685	GAAS
4	Standard	700.731	5.667	Air
5	Standard	-342.223	6.000	Ge
6	Standard	-1471.239	8.144	Air
7	Standard	55.878	10.955	ZnSe
8	Binary 2	48.539	0.050	Air
9	Binary 2	48.539	9.069	Ge
10	Standard	37.381	21.960	Air
11	Standard	-594.369	15.000	ZnSe
12	Standard	-89.155	5.112	Air
13	Standard	Infinity	2.000	Ge
14	Standard	Infinity	0.500	Air
15	Standard（stop）	Infinity	35.000	Air
16	Standard（image）	Infinity	-	Air

Table 5. Parameters of binary DOE surfaces for double waveband hybrid imaging optical system
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Table 5. Parameters of binary DOE surfaces for double waveband hybrid imaging optical system
Surface No. R A₁ A₂
6 100 -1412.836148812 -930.7069454066
7 100 -1412.836148812 -930.7069454066

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Shan Mao, Tao Lai, Huaile Nie, Yufeng Tang, Yichen Song, Jianlin Zhao. Optimal Design and Application of Double-Layer Diffractive Optical Element over Wide Temperature Range[J]. Acta Optica Sinica, 2023, 43(8): 0822026

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Paper Information

Category: Optical Design and Fabrication

Received: Oct. 31, 2022

Accepted: Jan. 3, 2023

Published Online: Apr. 6, 2023

The Author Email: Mao Shan (maoshan_optics@nwpu.edu.cn), Zhao Jianlin (jlzhao@nwpu.edu.cn)

DOI:10.3788/AOS221894

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Design results of double-layer DOE based on BIADE

Table 1. Design results of double-layer DOE based on BIADE

Table 2. Design results of double-layer DOE under ambient temperature of -20-60 ℃

Table 2. Design results of double-layer DOE under ambient temperature of -20-60 ℃

Table 3. Athermalization design specifications of mid-infrared waveband hybrid imaging optical system

Table 3. Athermalization design specifications of mid-infrared waveband hybrid imaging optical system

Table 4. Structure parameters of mid-infrared waveband hybrid imaging optical system with double-layer DOE

Table 4. Structure parameters of mid-infrared waveband hybrid imaging optical system with double-layer DOE

Table 5. Parameters of binary DOE surfaces for double waveband hybrid imaging optical system

Table 5. Parameters of binary DOE surfaces for double waveband hybrid imaging optical system