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Hybrid Color Filters for Multispectral Imaging
Author(s) -
He Xin,
Liu Yajing,
Beckett Paul,
Uddin Md Hemayet,
Nirmalathas Ampalavanapillai,
Unnithan Ranjith Rajasekharan
Publication year - 2020
Publication title -
advanced theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.068
H-Index - 17
ISSN - 2513-0390
DOI - 10.1002/adts.202000137
Subject(s) - multispectral image , filter (signal processing) , computer science , hyperspectral imaging , pixel , color filter array , image sensor , computer vision , plasmon , artificial intelligence , optical filter , spectral imaging , overlay , remote sensing , optics , color gel , materials science , optoelectronics , layer (electronics) , geology , nanotechnology , physics , programming language , thin film transistor
Abstract Multispectral cameras capture images in multiple wavelengths in narrow spectral bands. They offer advanced sensing well beyond normal cameras and many single‐sensor‐based multispectral cameras are commercialized aimed at a broad range of applications, such as agroforestry research, medical analysis, and so on. However, the existing single‐sensor‐based multispectral cameras require accurate alignment to overlay each filter on image sensor pixels, which makes their fabrication very complex, especially when the number of bands is large. This paper demonstrates a new filter technology using a hybrid combination of single plasmonic layer and dielectric layers by computational simulations. A filter mosaic of various bands with narrow spectral width can be achieved with single run manufacturing processes (i.e., exposure, development, deposition, and other minor steps) regardless of the number of bands.