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Proceedings Paper

Multiple-aperture optical design for micro-level cameras using 3D-printing method
Author(s): Wei-Jei Peng; Wei-Yao Hsu; Yuan-Chieh Cheng; Wen-Lung Lin; Zong-Ru Yu; Hsiao-Yu Chou; Fong-Zhi Chen; Chien-Chung Fu; Chong-Syuan Wu; Chao-Tsung Huang
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Paper Abstract

The design of the ultra miniaturized camera using 3D-printing technology directly printed on to the complementary metal-oxide semiconductor (CMOS) imaging sensor is presented in this paper. The 3D printed micro-optics is manufactured using the femtosecond two-photon direct laser writing, and the figure error which could achieve submicron accuracy is suitable for the optical system. Because the size of the micro-level camera is approximately several hundreds of micrometers, the resolution is reduced much and highly limited by the Nyquist frequency of the pixel pitch. For improving the reduced resolution, one single-lens can be replaced by multiple-aperture lenses with dissimilar field of view (FOV), and then stitching sub-images with different FOV can achieve a high resolution within the central region of the image. The reason is that the angular resolution of the lens with smaller FOV is higher than that with larger FOV, and then the angular resolution of the central area can be several times than that of the outer area after stitching. For the same image circle, the image quality of the central area of the multi-lens system is significantly superior to that of a single-lens. The foveated image using stitching FOV breaks the limitation of the resolution for the ultra miniaturized imaging system, and then it can be applied such as biomedical endoscopy, optical sensing, and machine vision, et al. In this study, the ultra miniaturized camera with multi-aperture optics is designed and simulated for the optimum optical performance.

Paper Details

Date Published: 22 February 2018
PDF: 8 pages
Proc. SPIE 10539, Photonic Instrumentation Engineering V, 1053919 (22 February 2018); doi: 10.1117/12.2289445
Show Author Affiliations
Wei-Jei Peng, Instrument Technology Research Ctr. (Taiwan)
Wei-Yao Hsu, Instrument Technology Research Ctr. (Taiwan)
Yuan-Chieh Cheng, Instrument Technology Research Ctr. (Taiwan)
Wen-Lung Lin, Instrument Technology Research Ctr. (Taiwan)
Zong-Ru Yu, Instrument Technology Research Ctr. (Taiwan)
Hsiao-Yu Chou, Instrument Technology Research Ctr. (Taiwan)
Fong-Zhi Chen, Instrument Technology Research Ctr. (Taiwan)
Chien-Chung Fu, National Tsing Hua Univ. (Taiwan)
Chong-Syuan Wu, National Tsing Hua Univ. (Taiwan)
Chao-Tsung Huang, National Tsing Hua Univ. (Taiwan)

Published in SPIE Proceedings Vol. 10539:
Photonic Instrumentation Engineering V
Yakov G. Soskind, Editor(s)

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