Low-cost photoacoustic computed tomography system using light-emitting-diodes

2020 ◽  
Author(s):  
Sumit Agrawal ◽  
Xinyi Yang ◽  
Hussain Albahrani ◽  
Christopher Fadden ◽  
Ajay Dangi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Light Emitting Diodes ◽  
Low Cost ◽  
Light Emitting ◽  
Tomography System

Halide Perovskite Based Light-emitting Diodes: A Scaling Up Perspective

2021 ◽  
Author(s):  
Ting Zhang ◽  
Lin Wang ◽  
Lingmei Kong ◽  
Chengxi Zhang ◽  
Haiyong He ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Low Cost ◽  
Scaling Up ◽  
Color Gamut ◽  
High Definition ◽  
Light Emitting ◽  
Metal Halide Perovskite ◽  
Wide Color Gamut ◽  
Halide Perovskite ◽  
High Color Purity

Metal halide perovskite light-emitting diodes (PeLEDs) have aroused extensive attention due to their high color purity, wide color gamut, low-cost solution processability, showing great potential for application in next-generation high-definition...

Solution Processed Fabrication of Perovskite Light-Emitting Diodes: Towards Low Cost and Commercial Applications

2021 ◽  
Author(s):  
Jianfeng Zhang ◽  
Bin Wei ◽  
Lin Wang ◽  
Xuyong Yang
Keyword(s):  
Light Emitting Diodes ◽  
Low Cost ◽  
Color Purity ◽  
Color Gamut ◽  
Light Emitting ◽  
Metal Halide Perovskite ◽  
Wide Color Gamut ◽  
Halide Perovskite ◽  
Commercial Applications ◽  
High Color Purity

Metal halide perovskite light-emitting diodes (PeLEDs) have emerged as one of the most promising candidates for next-generation high-resolution displays, due to their wide color gamut, high color purity and low-cost...

scholarly journals Development of Low-Cost Fast Photoacoustic Computed Tomography: System Characterization and Phantom Study

2019 ◽  
Vol 9 (3) ◽  
pp. 374 ◽  
Author(s):  
Mohsin Zafar ◽  
Karl Kratkiewicz ◽  
Rayyan Manwar ◽  
Mohammad Avanaki
Keyword(s):  
Computed Tomography ◽  
Spatial Resolution ◽  
Temporal Resolution ◽  
High Performance ◽  
Low Cost ◽  
Single Element ◽  
Tomography System ◽  
System Characterization ◽  
2D Images ◽  
Fast Rotating

A low-cost Photoacoustic Computed Tomography (PACT) system consisting of 16 single-element transducers has been developed. Our design proposes a fast rotating mechanism of 360o rotation around the imaging target, generating comparable images to those produced by large-number-element (e.g., 512, 1024, etc.) ring-array PACT systems. The 2D images with a temporal resolution of 1.5 s and a spatial resolution of 240 µm were achieved. The performance of the proposed system was evaluated by imaging complex phantom. The purpose of the proposed development is to provide researchers a low-cost alternative 2D photoacoustic computed tomography system with comparable resolution to the current high performance expensive ring-array PACT systems.

scholarly journals Enhanced Optical Output of Near-Ultraviolet Light-Emitting Diodes by a Monolayer of Nanospheres

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Wei Wan ◽  
Zhanxu Chen ◽  
Yongzhu Chen ◽  
Gengyan Chen
Keyword(s):  
Indium Tin Oxide ◽  
Light Emitting Diodes ◽  
Low Cost ◽  
Incident Light ◽  
Light Extraction Efficiency ◽  
Light Emitting ◽  
Hexagonal Close Packed ◽  
Exit Surface ◽  
Near Ultraviolet ◽  
Optical Output

The optical output of near-ultraviolet (NUV) light-emitting diodes (LEDs) was improved by including a monolayer of hexagonal close-packed polystyrene (PS) nanospheres. PS nanospheres with different sizes were deposited on the indium tin oxide layer of the NUV LEDs. The electroluminescence results showed that the light extraction efficiency of the NUV LEDs was increased by the inclusion of PS nanospheres, and the maximum optical output enhancement was obtained when the size of the nanospheres was close to the light wavelength. The largest enhancement of the optical output of 1.27-fold was obtained at an injection current of 100 mA. The enhanced optical output was attributed to part of the incident light beyond the critical angle being extracted when the exit surface of the NUV LEDs had a PS nanosphere monolayer. This method may serve as a low-cost and effective approach to raise the efficiency of NUV LEDs.

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