journal article·2018-10-29Open access

Measurement of High Numerical Aperture Cylindrical Surface with Iterative Stitching Algorithm

Dingfu Chen, Junzheng Peng, Sergiy Valyukh, Anand Asundi, Yingjie Yu

Applied Sciences· Volume 8· Issue 11

Abstract

There are some limitations in null test measurements in stitching interferometry. In order to meet the null test conditions, the moving distance between the sub-apertures often deviates from the theoretical preset distance, which leads to a position deviation of sub-apertures when measured. To overcome this problem, an algorithm for data processing is proposed in this paper. An optimal estimation of the deviation between sub-apertures is used to update their positions, and then a new overlapped region is obtained and again optimized. This process is repeated until the algorithm converges to an acceptable tolerance, and finally exact stitching is realized. A cylindrical lens was taken as an object for experimental examination of the proposed method. The obtained results demonstrate the validity, reliability, and feasibility of our iterative stitching algorithm.
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Research context

OpenAlex topics: Optical measurement and interference techniques · Advanced Measurement and Metrology Techniques · Laser and Thermal Forming Techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Lab of Applied Optics and Metrology, Department of Precision Mechanical Engineering, Shanghai University, Shanghai 200072, China

Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University, Guangzhou 510632, China

Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linkoping, Sweden

Centre for Optical and Laser Engineering, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798, Singapore

Funding

Natural Science Foundation of China (NSFC) · the National Natural Science Foundation of China (NSFC) · National Science and Technology Major Project

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