scholarly journals ECORE: A New Fast Automated Quantitative Mineral and Elemental Core Scanner

Minerals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 859
Author(s):  
Marie-Chloé Michaud Paradis ◽  
François R. Doucet ◽  
Kheireddine Rifai ◽  
Lütfü Ç. Özcan ◽  
Nawfel Azami ◽  
...  
Keyword(s):  
High Resolution ◽  
High Speed ◽  
High Performance ◽  
Chemical Mapping ◽  
Breakdown Spectroscopy ◽  
Ore Bodies ◽  
Laser Induced Breakdown ◽  
Chemical Content ◽  
Complete Chemical Analysis ◽  
Fast Chemical

Scarce platinum group elements (PGE) are mainly concealed in massive sulfides, and finding economically viable ore bodies largely relies on their fast chemical mapping. Most core scanners provide incomplete mineralogical contents, but none also provide a complete chemical analysis including light elements. This study investigates the performance of a fully automated laser-induced breakdown spectroscopy (LIBS) core scanner, the ECORE, by comparing its reliability to a scanning electron microscope-energy dispersive spectroscopy (SEM-EDS) mineral mapper and its speed to infrared diffuse reflectance hyperspectral imagers (IR-HSI). The LIBS elemental imaging has been put to the test in our previous work, as well as the high-resolution mineralogical mapping. This paper reports the scaling up analytical applicability of LIBS as a high performance and high-speed drill core scanner. The analysis of a full core tray in this study is the first and largest 7.62 megapixels image done by a LIBS core scanner to our knowledge. Both high-resolution and low-resolution data are put together to express both mineralogical and chemical content as a function of depth.

scholarly journals High-speed high-resolution laser diode-based photoacoustic microscopy for in vivo microvasculature imaging

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Xiufeng Li ◽  
Victor T C Tsang ◽  
Lei Kang ◽  
Yan Zhang ◽  
Terence T W Wong
Keyword(s):  
High Resolution ◽  
High Speed ◽  
High Performance ◽  
Continuous Wave ◽  
Signal To Noise Ratio ◽  
Cost Effective ◽  
High Signal ◽  
Photoacoustic Microscopy ◽  
Mouse Ear

AbstractLaser diodes (LDs) have been considered as cost-effective and compact excitation sources to overcome the requirement of costly and bulky pulsed laser sources that are commonly used in photoacoustic microscopy (PAM). However, the spatial resolution and/or imaging speed of previously reported LD-based PAM systems have not been optimized simultaneously. In this paper, we developed a high-speed and high-resolution LD-based PAM system using a continuous wave LD, operating at a pulsed mode, with a repetition rate of 30 kHz, as an excitation source. A hybrid scanning mechanism that synchronizes a one-dimensional galvanometer mirror and a two-dimensional motorized stage is applied to achieve a fast imaging capability without signal averaging due to the high signal-to-noise ratio. By optimizing the optical system, a high lateral resolution of 4.8 μm has been achieved. In vivo microvasculature imaging of a mouse ear has been demonstrated to show the high performance of our LD-based PAM system.

Spectroscopy of laser-produced plasmas: Setting up of high-performance laser-induced breakdown spectroscopy system

Pramana ◽  
2010 ◽  
Vol 75 (6) ◽  
pp. 1145-1150 ◽  
Author(s):  
V. K. Unnikrishnan ◽  
Kamlesh Alti ◽  
Rajesh Nayak ◽  
Rodney Bernard ◽  
V. B. Kartha ◽  
...  
Keyword(s):  
High Performance ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Spectroscopy System

High-resolution elemental mapping of the root-rhizosphere-soil continuum using laser-induced breakdown spectroscopy (LIBS)

2019 ◽  
Vol 131 ◽  
pp. 119-132 ◽  
Author(s):  
Peter D. Ilhardt ◽  
Jamie R. Nuñez ◽  
Elizabeth H. Denis ◽  
Joshua J. Rosnow ◽  
Eirik J. Krogstad ◽  
...  
Keyword(s):  
High Resolution ◽  
Rhizosphere Soil ◽  
Laser Induced Breakdown Spectroscopy ◽  
Elemental Mapping ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

A LOW POWER HIGH RESOLUTION ROIC DESIGN WITH 14-BIT COLUMN-LEVEL ADC FOR 384 × 288 IRFPA

2013 ◽  
Vol 22 (09) ◽  
pp. 1340015 ◽  
Author(s):  
YAJING ZHANG ◽  
WENGAO LU ◽  
GUANNAN WANG ◽  
ZHONGJIAN CHEN ◽  
YACONG ZHANG
Keyword(s):  
High Resolution ◽  
Low Power ◽  
Integrated Circuit ◽  
High Speed ◽  
High Performance ◽  
Low Noise ◽  
Cmos Process ◽  
Readout Integrated Circuit ◽  
Analog To Digital Conversion ◽  
Amplifier Design

A readout integrated circuit (ROIC) of infrared focal plane array (IRFPA) with low power and low noise is presented in this paper. It consists of a 384 × 288 pixel array and column-level A/D conversion circuits. The proposed system has high resolution because of the odd–even Analog to Digital Conversion (ADC) structure, containing correlated switches design, multi-Vth amplifier design and high speed high resolution comparator design including latch-stage. Designed and simulated in 0.35-μm CMOS process, this high performance ROIC achieves 81.24 dB SNR at 8.64 KS/s consuming 98 mW under 5 V voltage supply, resulting in an ENOB of 13.2-bit.

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