scholarly journals Plasmonic color filter array based visible light spectroscopy

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jyotindra R. Shakya ◽  
Farzana H. Shashi ◽  
Alan X. Wang
Keyword(s):  
Visible Light ◽  
Mean Squared Error ◽  
Optical Filters ◽  
Color Filter ◽  
Color Filter Array ◽  
Filter Array ◽  
Resonant Grating ◽  
The Cost ◽  
Color Filters ◽  
Visible Light Spectroscopy

AbstractCompared with traditional Fabry–Perot optical filters, plasmonic color filters could greatly remedy the complexity and reduce the cost of manufacturing. In this paper we present end-to-end demonstration of visible light spectroscopy based on highly selective plasmonic color filter array based on resonant grating structure. The spectra of 6 assorted samples were measured using an array of 20 narrowband color filters and detected signals were used to reconstruct original spectra by using new unmixing algorithm and by solving least squares problem with smoothing regularization. The original spectra were reconstructed with less than 0.137 root mean squared error. This works shows promise towards fully integrating plasmonic color filter array in imagers used in hyperspectral cameras.

scholarly journals Stepwise-Nanocavity-Assisted Transmissive Color Filter Array Microprints

Research ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Yasi Wang ◽  
Mengjie Zheng ◽  
Qifeng Ruan ◽  
Yanming Zhou ◽  
Yiqin Chen ◽  
...  
Keyword(s):  
Optical Filters ◽  
Degree Of Freedom ◽  
Color Filter ◽  
Thickness Variation ◽  
Color Filter Array ◽  
Environmental Friendliness ◽  
Structural Colors ◽  
Image Sensing ◽  
Filter Array ◽  
Potential Applications

Visible-light color filters using patterned nanostructures have attracted much interest due to their various advantages such as compactness, enhanced stability, and environmental friendliness compared with traditional pigment or dye-based optical filters. While most existing studies are based on planar nanostructures with lateral variation in size, shape, and arrangement, the vertical dimension of structures is a long-ignored degree of freedom for the structural colors. Herein, we demonstrate a synthetic platform for transmissive color filter array by coordinated manipulations between height-varying nanocavities and their lateral filling fractions. The thickness variation of those nanocavities has been fully deployed as an alternative degree of freedom, yielding vivid colors with wide gamut and excellent saturation. Experimental results show that the color-rendering capability of the pixelated nanocavities can be still retained as pixels are miniaturized to 500 nm. Crosstalk between closely spaced pixels of a Bayer color filter arrangement was calculated, showing minimal crosstalk for 1 µm2 square subpixels. Our work provides an approach to designing and fabricating ultracompact color filter arrays for various potential applications including stained-glass microprints, microspectrometers, and high-resolution image sensing systems.

Toward blind joint demosaicing and denoising of raw color filter array data

2021 ◽  
Author(s):  
Fangfang Wu ◽  
Tao Huang ◽  
Weisheng Dong ◽  
Guangming Shi ◽  
Zhonglong Zheng ◽  
...  
Keyword(s):  
Color Filter ◽  
Color Filter Array ◽  
Array Data ◽  
Filter Array

scholarly journals Adaptive Wiener filter super-resolution of color filter array images

2013 ◽  
Vol 21 (16) ◽  
pp. 18820 ◽  
Author(s):  
Barry K. Karch ◽  
Russell C. Hardie
Keyword(s):  
Wiener Filter ◽  
Super Resolution ◽  
Color Filter ◽  
Color Filter Array ◽  
Filter Array
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