Zhongsheng Zhai

Hubei University of Technology

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Xuanze Wang

Hubei University of Technology

Dun Liu

Hubei University of Technology

Qinghua Lv

Hubei University of Technology

Wei Feng

Hubei University of Technology

Liangen Yang

Hubei University of Technology

Lie Chen

Hubei University of Technology

Deyuan Lou

Hubei University of Technology

杨Y

杨奇彪 Yang Qibiao

陈C

陈列 Chen Lie

Zhen Zeng

Xi’an Jiaotong-Liverpool University

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Hubei University of Technology

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Chinese Academy of Sciences

Huazhong University of Science and Technology

University of Chinese Academy of Sciences

University of Science and Technology of China

Tsinghua University

Beihang University

Wuhan University

Harbin Institute of Technology

University of Liverpool

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Oblique-Incidence Interferometric Measurement of Optical Surface Based on a Liquid-Crystal-on-Silicon Spatial Light Modulator

Photonics (2024)

Zhen Zeng Chengzhao Jiang Yuxuan Jia Zhongsheng Zhai Xiaodong Zhang

An oblique-incidence interferometric measurement method is proposed to measure and adjust optical surfaces with a liquid-crystal-on-silicon spatial light modulator (LCoS-SLM). The optical system only consists of an interferometer and an LCoS-SLM with precision mounts. It could reduce the measuring cost and time consumption due to the programmable function of the LCoS-SLM and offer the ability to align the optical system. The oblique-incidence measurement theory and optical system adjustment method are established based on an off-axis paraboloid model. The ray-tracing program to calculate the compensation phase map in the measurement is proposed with math models. In the optical alignment step, the off-axis paraboloid model is used to apply the LCoS-SLM as a phase compensator to generate a focusing spot or light spot array to adjust the measured optical surface. And in the interferometric measurement step, the calculated compensation phase map from the ray-tracing calculation is loaded on the LCoS-SLM using the same optical setup as the optical alignment step without any mechanical adjustment. Two interference measurement experiments of typical optical surfaces were carried out to verify the accuracy of the measuring system.

Paraboloid

Spatial light modulator

10.3390/photonics11020132

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Damage Properties of Single Pulse of Nanosecond Laser on Damping Rubber Material

Laser & Optoelectronics Progress (2016)

陈列 Chen Lie 王呈祥 Wang Chengxiang 汪幸 Wang Xing Zhongsheng Zhai 杨奇彪 Yang Qibiao

Nanosecond

10.3788/lop53.081402

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Citations (1)

Defects detection of composite material using laser shearography

International Conference on Electric Information and Control Engineering (2011)

Qinghua Lv Zhongsheng Zhai Zhongbao Xu Cheng Chun-Fu

Laser shearography is applied to the defects detection of the airplane composite materials with interfacial viscose brushing off and delaminating damage. The form and the theory of laser shearography system are analyzed in this paper. Results show that the damage can be exactly quickly located ignoring the global displacement with the Wollaston prism.

Shearography

Prism

10.1109/iceice.2011.5778139

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A microscope with large depth of the field realized through an axicon

International Conference on Electric Information and Control Engineering (2011)

Zhongsheng Zhai Qinghua Lv Xuanze Wang Zhongbao Xu

It has been an active research topic to extend the depth-of-field of optical imaging systems. The axicon that can image a point into a line segment along the optical axis, it can be used to extend the depth of field of a microscope. A large depth of field microscope, realized by the axicon and digital imaging processing technology, is presented in this paper. The parameters of the expected microscope system are given with ZEMAX. The depth of field is analyzed based on the condition of focal segment. Imaging experiments show that the axicon can extend the depth of field.

Axicon

Depth of field

Zemax

10.1109/iceice.2011.5777783

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A two-dimensional table with long travel and micropositioning

International Conference on Mechanic Automation and Control Engineering (2010)

Zhongsheng Zhai Qinghua Lv Xuanze Wang Liangen Yang

High-precision, long travel two-dimensional tables are widely used in ultra-precision machining, multi-dimensional measuring machine, surface grinder and advanced manufacturing fields. A two-dimensional table with long travel and micro-nano positioning is presented in this paper. The table is controlled by the combination of a computer and a FPGA (Field Programmable Gate Array) device. The moving units are consisted of AC servo motors and piezoelectric ceramics (PZT), which are used to achieve macro and micro-positioning respectively. The positioning accuracy is controlled by diffracting gratings and four-quadrant photoelectric receiver (QPD). Experimental results show that the positioning error of this table is 0.2µm, and the working range is 100×100mm ² .

Table (database)

Quadrant (abdomen)

Lookup table

10.1109/mace.2010.5535702

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Extended depth of field with the optimal ‘0, π’ binary phase pupil mask

Journal of Modern Optics (2013)

Qinghua Lv Xiao Zhu Zhongbao Xu Zhongsheng Zhai Chunfu Cheng

A ‘0, π’ phase pupil mask was developed to extend the depth of the field of a circularly symmetric optical imaging system. A global search algorithm was used to seek an optimal pupil mask which provides the largest spatial frequency band in a certain desired contrast value. The modulation transfer function curves and the normalized point spread function figures of the imaging system with the optimal mask were analyzed. The results show that the imaging system has a high resolution in a long frequency band and can obtain clear images without any post-processing. The experimental results also demonstrate that the depth of field of the imaging system is extended sixfold successfully.

Optical transfer function

Depth of field

Point spread function

Pupil function

Spatial frequency

Exit pupil

Entrance pupil

10.1080/09500340.2013.796013

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Citations (2)

ナノ秒パルスによる減衰ゴム材料の損傷特性【JST・京大機械翻訳】

Jiguang Yu Dianzixue Jinzhan (2016)

Lie Chen Wang Chengxiang Wang Xing Zhongsheng Zhai Qibiao Yang

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基于空间光调制器的正交相位光栅衍射特性

Acta Optica Sinica (2022)

Zhongsheng Zhai 黄缘胜 Huang Yuansheng 李沁洋 Li Qinyang 余鑫 Yu Xin 吕清花 Qinghua Lü

10.3788/aos202242.1605002

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A Method to Improve the Precision of Interferometric Phase-recognization under Open-loop PZT Drive

Liangen Yang Xuanze Wang Liu Bing-kang Zhongsheng Zhai Tao He

For the monochromatic light interferometry under open-loop PZT drive, a high precision method for phase recognization that satisfies the four steps phase-shift algorithm is proposed. The total idea of the phase recognization method is as follows. Firstly, two pixels with suitable phase-difference are selected from the interference field and the interference equations of the two pixels' gray values are established in one driven cycle of PZT. Secondly, the parameters of interference equations can be obtained by using ellipse fitting algorithm. Thirdly, the point-to-point step length of PZT drive and sequence phases can be determined through reverse calculation of sequence phases. Finally, in order to calculate initial phase of every pixels four interference grayscale images that meet the four steps phase-shift algorithm are designed and calculated through Lagrange parabolic interpolation. The experimental results have shown that this method decreases the requirement for hardware, environment and needs less interference grayscale images than traditional methods. The method can meet the high precision demands of surface topography measurement and has high processing speed.

Interpolation

Ellipse

Monochromatic color

Point target

10.5220/0005737701230129

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3D reconstruction of structured light fields based on point cloud adaptive repair for highly reflective surfaces

Applied Optics (2021)

Wei Feng Tong Qu Junhui Gao Henghui Wang Xiuhua Li

In this paper, a novel method, to the best of our knowledge, of structured light fields based on point cloud adaptive repair is proposed to realize 3D reconstruction for highly reflective surfaces. We have designed and built a focused light field camera whose spatial and angular resolution can be flexibly adjusted as required. Then the subaperture image extraction algorithm based on image mosaic is deduced and presented to obtain multidirectional images. After that, the 3D reconstruction of structured light field imaging based on point cloud adaptive repair is presented to accurately reconstruct for highly reflective surfaces. In addition, a method based on smoothness and repair rate is also proposed to objectively evaluate the performance of the 3D reconstruction. Experimental results demonstrate the validity of the proposed method to perform high-quality depth reconstruction for highly reflective surfaces. Generally, our method takes advantage of the multidirectional imaging of the light field camera and can ensure good modulation effect of structured light while avoiding hardware complexity, which makes it application more convenient.

Structured Light

Light Field

3D Reconstruction

Smoothness

Surface reconstruction

Depth of field

10.1364/ao.431538

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Citations (12)