Laser & Optoelectronics Progress, Volume. 58, Issue 20, 2000002(2021)
Research Progress and Applications of Spectral Imaging System on Chip
Fig. 5. Filtering structures. (a) Nanodisk-nanohole hybrid structure arrays; (b) ultrafine spectrum tunability[21]
Fig. 7. Methods of discrete-manufacturing-then-integrating. (a) Sony realized the integration of nano aluminum hole filter arrays and detector through manual operation under microscope[27]; (b) spectral chip manufactured by Zhejiang University based on wafer bonding technology[31]; (c) schematic diagram of FP filter structure and focal plane arrays integration through bonding [33]
Fig. 8. IMEC builds an extremely compact spectral imaging system based on FP interference filter chip[35]
Fig. 10. Integrated filtering image sensor by IMEC. (a) Chip-scale multispectral imager through integrated per-pixel filtering by IMEC; (b) IMEC integrated filtering CMOS image sensor (left) and package (right) [39]
Fig. 11. Hyperspectral mobile application equipments. (a) Optical concept map of VTT iPhone 5s hyperspectral imager;(b) banknote recognition application based on iPhone 5s hyperspectral imager; (b1)-(b3) images of banknotes at 491 nm, 460 nm, and 521 nm, respectively, and the “tiny circle” pattern on the images is visible at 460 nm and 491 nm, but not at 521 nm[41]
Fig. 12. On-chip spectral imaging products. (a) Compact spectral imaging system of IMEC (top view at left and axonometric view at right); (b) white plastic articles group (left side is physical image, right side is spectrum obtained by the compact spectral imaging system)[35]
Fig. 13. Optical sorting by Ximea xiQ multispectral camera [50]
Fig. 14. Description and size of Specim IQ multi-spectral camera (left) and camera rendering (right) [52]
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Fei Wang, Xiaochang Yu, Qingling Luo, Chengyang Zhou, Yiting Yu. Research Progress and Applications of Spectral Imaging System on Chip[J]. Laser & Optoelectronics Progress, 2021, 58(20): 2000002
Category: Reviews
Received: Nov. 11, 2020
Accepted: Jan. 2, 2021
Published Online: Oct. 12, 2021
The Author Email: Yu Yiting (yyt@nwpu.edu.cn)