Design of Mid-Wave Infrared Optical System with High Variable Ratio Miniaturization

Hongda Chen; Changxi Xue

doi:10.3788/AOS202040.0222001

Acta Optica Sinica, Volume. 40, Issue 2, 0222001(2020)

Design of Mid-Wave Infrared Optical System with High Variable Ratio Miniaturization

Hongda Chen and Changxi Xue^*

Author Affiliations

School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun, Jilin 130022, China

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Abstract Get PDF(in Chinese)

Figures & Tables(11)

Fig. 1. Schematic of traditional four-component zoom system

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Fig. 2. Schematic of composite continuous zoom system

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Fig. 3. Schematic of optical system. (a) EFL:360 mm; (b) EFL:250 mm; (c) EFL:200 mm; (d) EFL:100 mm; (e) EFL:70 mm; (f) EFL:12 mm

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Fig. 4. MTF curves. (a) EFL:360 mm; (b) EFL:250 mm; (c) EFL:200 mm; (d) EFL:100 mm; (e) EFL:70 mm; (f) EFL:12 mm

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Fig. 5. Diffuse speckle diagrams. (a) EFL:360 mm; (b) EFL:250 mm; (c) EFL:200 mm; (d) EFL:100 mm; (e) EFL:70 mm; (f) EFL:12 mm

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$Relation among radius, phase, and period of diffraction optical element. (a) Diffraction plane of the fifth lens; (b) diffraction plane of the seventh lens$

Fig. 6. Relation among radius, phase, and period of diffraction optical element. (a) Diffraction plane of the fifth lens; (b) diffraction plane of the seventh lens

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Fig. 7. Cam curves

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Fig. 8. 3D model of cam

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Table 1. Optical design parameters
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Table 1. Optical design parameters
Parameter Index
Working waveband /μm 3.7--4.8
F/# 4.0
Focal range /mm 12--360
Detector type 640×512(cooled)
Pixel size /μm 15

Table 2. Parameters of moving component spacingmm
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Table 2. Parameters of moving component spacingmm
Focal f' /mm 360 250 200 100 70 12
d₁ 3.952 3.952 3.952 3.952 3.952 1.756
d₂ 42.563 41.356 40.538 36.731 33.556 11.992
d₃ 4.360 9.567 12.703 22.959 29.014 61.175
d₄ 27.695 23.332 21.378 14.928 11.674 3.273

Table 3. Ring period of diffraction optical element
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Table 3. Ring period of diffraction optical element
Radius /mm The fifth lens diffraction ring The seventh lens diffraction ring
r₁ 2.114599 1.496816
r₂ 2.957900 2.128281
r₃ 3.585547 2.261199
r₄ 4.100169 3.044253
r₅ 4.542089 3.424050
r₆ 4.932224 3.774302
r₇ 4.103236

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Hongda Chen, Changxi Xue. Design of Mid-Wave Infrared Optical System with High Variable Ratio Miniaturization[J]. Acta Optica Sinica, 2020, 40(2): 0222001

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