Optical design of continuous zoom polarization video microscope

Xin Liu; Jun Chang; Weilin Chen; Shan Du; Chuhan Wu; Xiangxin Xu; Yi Zhu

doi:10.3788/IRLA20200003

Infrared and Laser Engineering, Volume. 49, Issue 8, 20200003(2020)

Optical design of continuous zoom polarization video microscope

Xin Liu¹, Jun Chang¹, Weilin Chen¹, Shan Du¹, Chuhan Wu¹, Xiangxin Xu¹, and Yi Zhu²

¹Key Laboratory of Photoelectronic Imaging Technology and System of Ministry of Education of China, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China

²China Ordnance Industrial Standardization Research Institute, Beijing 100089, China

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Figures & Tables(10)

Fig. 1. Structure of five-component zoom system

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Fig. 2. Optical design flow chart

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Fig. 3. Optical layouts of 1×, 2.1×, 3.3×, 4.8×, 6.5×

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Fig. 4. Spot diagrams of 1×, 2.1×, 3.3×, 4.8×, 6.5×

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Fig. 5. MTF plots of 1×, 2.1×, 3.3×, 4.8×, 6.5×

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Fig. 6. Zoom curves of zoom group, compensating group 1 and 2

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Table 1.
Representative zoom microscope objectives
变焦显微物镜代表产品
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Table 1.
Representative zoom microscope objectives
变焦显微物镜代表产品
Company Product Zoom ratio Zoom range
Olympus MVX10 10:1 0.63×−6.3×
Zeiss Smartzoom 5 10:1 0.5×−5×
Zhejiang Sunny Ltd. SZ6Series 6.5:1 0.7×−4.5×
Guilin Microtech Ltd. MZDM0745Series 6.4:1 0.7×−4.5×

Table 2.
Specifications of optical system
系统主要设计指标

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Table 2.
Specifications of optical system
系统主要设计指标

Parameters	Value
Spectral range	Visible spectrum
Numerical aperture（NA）	0.05–0.2
Field of view/mm	Φ1.70–11.1
Object distance/mm	20
Zoom range	1×–6.5×
1X-3.3XMTF(80 lp/mm)	≥0.3
3.3X-6.5XMTF(60 lp/mm)	≥0.3

Table 3.
Basic parameters of typical zoom states
典型变焦状态的基本参数
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Table 3.
Basic parameters of typical zoom states
典型变焦状态的基本参数
Zoom 1 Zoom 2 Zoom 3 Zoom 4 Zoom 5
Magnification 1× 2.1× 3.3× 4.8× 6.5×
Field of view/mm 11.1 5.28 3.36 2.31 1.70
NA 0.05 0.1 0.14 0.17 0.20

Table 4.
Zoom CAM curve data table
凸轮曲线数据表
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Table 4.
Zoom CAM curve data table
凸轮曲线数据表
D/mm Zoom 1 Zoom 2 Zoom 3 Zoom 4 Zoom 5
ZG 9.512 37.303 43.973 44.489 41.4605
CG 1 142.973 91.180 71.612 57.829 46.495
CG 2 158.869 118.685 111.764 113.731 120.246

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Xin Liu, Jun Chang, Weilin Chen, Shan Du, Chuhan Wu, Xiangxin Xu, Yi Zhu. Optical design of continuous zoom polarization video microscope[J]. Infrared and Laser Engineering, 2020, 49(8): 20200003

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