Real-time short-wave infrared hyperspectral conformal imaging sensor for the detection of threat materials

2016 ◽  
Author(s):  
Matthew P. Nelson ◽  
Lei Shi ◽  
Lucas Zbur ◽  
Ryan J. Priore ◽  
Patrick J. Treado
Keyword(s):  
Real Time ◽  
Short Wave ◽  
Short Wave Infrared ◽  
Imaging Sensor

Real-time, short-wave, infrared hyperspectral conforming imaging sensor for the detection of threat materials

2018 ◽  
Author(s):  
Matthew P. Nelson ◽  
Shawna K. Tazik ◽  
Patrick J. Treado ◽  
Srinivasa Narasimhan ◽  
Bernardo Pires ◽  
...  
Keyword(s):  
Real Time ◽  
Short Wave ◽  
Short Wave Infrared ◽  
Imaging Sensor

Short-wave infrared real-time high dynamic range imaging and display based on correlated double sampling

2021 ◽  
Vol 60 (6) ◽  
pp. 1774
Author(s):  
Cheng Fei ◽  
Junliang Liu ◽  
Yongfu Li ◽  
Yi Gu ◽  
Zhaojun Liu ◽  
...  
Keyword(s):  
Real Time ◽  
Dynamic Range ◽  
High Dynamic Range ◽  
Short Wave ◽  
Double Sampling ◽  
High Dynamic Range Imaging ◽  
Range Imaging ◽  
Correlated Double Sampling ◽  
High Dynamic ◽  
Short Wave Infrared

scholarly journals Real-Time Imaging of Short-Wave Infrared Luminescence Lifetimes for Anti-counterfeiting Applications

2021 ◽  
Vol 9 ◽  
Author(s):  
Roman Ziniuk ◽  
Artem Yakovliev ◽  
Hui Li ◽  
Guanying Chen ◽  
Junle Qu ◽  
...  
Keyword(s):  
Rare Earth ◽  
Real Time ◽  
Frequency Conversion ◽  
Imaging System ◽  
Short Wave ◽  
Rare Earth Ions ◽  
High Rate ◽  
Luminescence Spectra ◽  
Real Time Imaging ◽  
Short Wave Infrared

Rare-earth doped nanoparticles (RENPs) have been widely used for anti-counterfeiting and security applications due to their light frequency conversion features: they are excited at one wavelength, and they display spectrally narrow and distinguished luminescence peaks either at shorter wavelengths (i.e., frequency/energy upconversion) or at longer wavelengths (frequency/energy downconversion). RENPs with a downconversion (DC) photoluminescence (PL) in short-wave infrared (SWIR) spectral range (~1,000–1,700 nm) have recently been introduced to anti-counterfeiting applications, allowing for multilevel protection based on PL imaging through opaque layers, due to a lesser scattering of SWIR PL emission. However, as the number and spectral positions of the discrete PL bands exhibited by rare-earth ions are well-known, it is feasible to replicate luminescence spectra from RENPs, which results in a limited anti-counterfeiting security. Alternatively, lifetime of PL from RENPs can be used for encoding, as it can be finely tuned in broad temporal range (i.e., from microseconds to milliseconds) by varying type of dopants and their content in RENPs, along with the nanoparticle morphology and size. Nevertheless, the current approach to decoding and imaging the RENP luminescence lifetimes requires multiple steps and is highly time-consuming, precluding practical applications of PL lifetime encoding for anti-counterfeiting. Herein, we report the use of a rapid lifetime determination (RLD) technique to overcome this issue and introduce real-time imaging of SWIR PL lifetime for anti-counterfeiting applications. NaYF4:20% Yb, x% Er (x = 0, 2, 20, 80)@NaYF4 core@shell RENPs were synthesized and characterized, revealing DC PL in SWIR region, with maximum at ~1,530 nm and PL lifetimes ranging from 3.2 to 6 ms. Imaging of the nanoparticles with different lifetimes was performed by the developed time-gated imaging system engaging RLD method and the precise manipulation of the delay between the excitation pulses and camera gating windows. Moreover, it is shown that imaging and decrypting can be performed at a high rate (3–4 fps) in a cyclic manner, thus allowing for real-time temporal decoding. We believe that the demonstrated RLD-based fast PL lifetime imaging approach can be employed in other applications of photoluminescent RENPs.

Real-Time and High-Resolution Bioimaging with Bright Aggregation-Induced Emission Dots in Short-Wave Infrared Region

2018 ◽  
Vol 30 (12) ◽  
pp. 1706856 ◽  
Author(s):  
Ji Qi ◽  
Chaowei Sun ◽  
Abudureheman Zebibula ◽  
Hequn Zhang ◽  
Ryan T. K. Kwok ◽  
...  
Keyword(s):  
High Resolution ◽  
Real Time ◽  
Infrared Region ◽  
Short Wave ◽  
Aggregation Induced Emission ◽  
Short Wave Infrared

scholarly journals Evaporated Se x Te 1‐ x Thin Films with Tunable Bandgaps for Short‐Wave Infrared Photodetectors

2020 ◽  
Vol 32 (38) ◽  
pp. 2001329 ◽  
Author(s):  
Chaoliang Tan ◽  
Matin Amani ◽  
Chunsong Zhao ◽  
Mark Hettick ◽  
Xiaohui Song ◽  
...  
Keyword(s):  
Thin Films ◽  
Short Wave ◽  
Infrared Photodetectors ◽  
Short Wave Infrared

scholarly journals Quantum magneto transport properties of nanostructure multi quantum wells short wave Infrared detectors

2021 ◽  
Vol 1743 ◽  
pp. 012009
Author(s):  
Merieme Benaadad ◽  
Abdelhakim Nafidi ◽  
Samir Melkoud ◽  
Driss Barkissy ◽  
Nassima Benchtaber
Keyword(s):  
Quantum Wells ◽  
Transport Properties ◽  
Infrared Detectors ◽  
Short Wave ◽  
Short Wave Infrared

CO2 retrieval model and analysis in short-wave infrared spectrum

Optik ◽  
2016 ◽  
Vol 127 (10) ◽  
pp. 4422-4425 ◽  
Author(s):  
Yanfen Li ◽  
Chunmin Zhang ◽  
Dongdong Liu ◽  
Jie Chen ◽  
Piao Rong ◽  
...  
Keyword(s):  
Infrared Spectrum ◽  
Short Wave ◽  
Retrieval Model ◽  
Short Wave Infrared
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