Large-depth-of-field imaging system using a square aperture overlapped micro-lens array

Pang, Kuo and Song, Le and Li, Xiangzheng and Tee, Clarence A. T. H. and Zhang, Haoyang and Fang, Fengzhou (2021) Large-depth-of-field imaging system using a square aperture overlapped micro-lens array. Optical Engineering, 60 (6). ISSN 0091-3286, DOI

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The application of a light-field camera based on an overlapped square aperture micro-lens array (MLA) is reported. The location and direction of the incident light rays are recorded and reconstructed with a large depth of field by this imaging system. The optimized square MLA for light-field imaging, which increases the fill factor and utilization efficiency of the image sensor, is proposed. The array is fabricated by ultra-precision machining and micro-injection molding, which is economical and ensures that the array remains in high accuracy and consistency. Finally, a light-field imaging system is built with lens groups, an MLA, and an adjustable square stop. A comparative study of the field in-depth and super-resolution image is conducted. The experimental results show that the system significantly increases the range of the depth of the field. The reconstructed image is also enhanced with higher resolution and clarity. (C) 2021 Society of Photo-Optical Instrumentation Engineers (SPIE)

Item Type: Article
Funders: National Natural Science Foundation of China (NSFC) [52075384] [51175377], State Key Laboratory of Precision Measuring Technology and Instruments (Tianjin University)
Uncontrolled Keywords: Light-field imaging; Square aperture; Micro-lens array; Depth of field
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering > Department of Electrical Engineering
Depositing User: Ms Zaharah Ramly
Date Deposited: 04 Aug 2022 02:46
Last Modified: 04 Aug 2022 02:46

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