Multi-Modal Image Sharpening in Fourier Transform Infrared (FTIR) Microscopy

The Analyst ◽  
2021 ◽  
Author(s):  
Rupali Mankar ◽  
Chalapathi Gajjela ◽  
Farideh Foroozandeh ◽  
Saurabh Prasad ◽  
David Mayerich ◽  
...  
Keyword(s):  
Fourier Transform ◽  
High Resolution ◽  
Numerical Aperture ◽  
Ftir Microscopy ◽  
Mid Infrared ◽  
Spatially Resolved ◽  
Heterogeneous Samples ◽  
Molecular Specificity ◽  
High Resolution Images ◽  
Infrared Spectroscopic Imaging

Mid-infrared Spectroscopic Imaging (MIRSI) provides spatially-resolved molecular specificity by measuring wavelength-dependent mid-infrared absorbance. Infrared microscopes use large numerical aperture objectives to obtain high-resolution images of heterogeneous samples. However, the optical...

scholarly journals Analysis of new species retrieved from MIPAS

2014 ◽  
Vol 56 ◽  
Author(s):  
Shaomin Cai ◽  
Anu Dudhia
Keyword(s):  
Fourier Transform ◽  
New Species ◽  
High Resolution ◽  
Trace Gases ◽  
Michelson Interferometer ◽  
Emission Spectra ◽  
Fourier Transform Spectrometer ◽  
Mid Infrared ◽  
The Third ◽  
Atmospheric Sounding

The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) instrument which operated on the Envisat satellite from 2002-2012 is a Fourier transform spectrometer for the measurement of high-resolution gaseous emission spectra at the Earth's limb. It operates in the near- to mid-infrared, where many of the main atmospheric trace gases have important emission features. The initial operational products were profiles of Temperature, H2O, O3, CH4, N2O, HNO3, and NO2, and this list was recently extended to include N2O5, ClONO2, CFC-11 and CFC-12. Here we present preliminary results of retrievals of the third set of species under consideration for inclusion in the operational processor: HCN, CF4, HCFC-22, COF2 and CCl4.

scholarly journals High-speed and high-precision PbSe/PbI2 solution process mid-infrared camera

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hannaneh Dortaj ◽  
Mahboubeh Dolatyari ◽  
Armin Zarghami ◽  
Farid Alidoust ◽  
Ali Rostami ◽  
...  
Keyword(s):  
High Resolution ◽  
High Speed ◽  
Room Temperature ◽  
New Technologies ◽  
Solution Process ◽  
Infrared Camera ◽  
Cost Effective ◽  
Infrared Light ◽  
Mid Infrared ◽  
High Resolution Images

AbstractInfrared (IR) cameras based on semiconductors grown by epitaxial methods face two main challenges, which are cost and operating at room temperature. The alternative new technologies which can tackle these two difficulties develop new and facile material and methods. Moreover, the implementation of high speed camera, which makes high resolution images with normal methods, is very expensive. In this paper, a new nanostructure based on a cost-effective solution processed technology for the implementation of the high-speed mid-infrared light camera at room temperature is proposed. To this end, the chemically synthesized PbSe–PbI2 core–shell Quantum Dots (QDs) are used. In this work, a camera including 10 × 10 pixels is fabricated and synthesized QDs spin-coated on interdigitated contact (IDC) and then the fabricated system passivated by epoxy resin. Finally, using an electronic reading circuit, all pixels are converted to an image on the monitor. To model the fabricated camera, we solved Schrodinger–Poisson equations self consistently. Then output current from each pixel is modeled based on semiconductor physics and dark and photocurrent, as well as Responsivity and Detectivity, are calculated. Then the fabricated device is examined, and dark and photocurrents are measured and compared to the theoretical results. The obtained results indicate that the obtained theoretical and measured experimental results are in good agreement together. The fabricated detector is high speed with a rise time of 100 ns. With this speed, we can get 10 million frames per second; this means we can get very high-resolution images. The speed of operation is examined experimentally using a chopper that modulates input light with 50, 100, 250, and 500 Hz. It is shown that the fabricated device operates well in these situations, and it is not limited by the speed of detector. Finally, for the demonstration of the proposed device operation, some pictures and movies taken by the camera are attached and inserted in the paper.

scholarly journals VistoSeg: a MATLAB pipeline to process, analyze and visualize high resolution histology images for Visium spatial transcriptomics data

2021 ◽  
Author(s):  
Madhavi Tippani ◽  
Heena Rajesh Divecha ◽  
Joseph L. Catallini ◽  
Lukas M Weber ◽  
Abby Spangler ◽  
...  
Keyword(s):  
Gene Expression ◽  
High Resolution ◽  
Programming Language ◽  
Gene Expression Data ◽  
Expression Data ◽  
Intact Tissue ◽  
Spatially Resolved ◽  
Transcriptomics Data ◽  
High Resolution Images ◽  
Molecular Information

Motivation: Recent advances in spatially-resolved transcriptomics technologies such as the 10x Genomics Visium platform have enabled the generation of transcriptome-wide spatial expression maps within intact tissue. However, steps for processing the high-resolution histology images, extracting relevant features from the images, and integrating them with the gene expression data remain unresolved. Results: We describe VistoSeg, a MATLAB pipeline to process, analyze, and interactively visualize the high-resolution images from the 10x Genomics Visium platform. The output from VistoSeg can then be integrated with the spatial-molecular information in downstream analyses using any programming language, such as R or Python. Availability: VistoSeg is available at https://github.com/LieberInstitute/VistoSeg with a tutorial at http://research.libd.org/VistoSeg

High-resolution mid-infrared frequency comb Fourier transform spectrometer

2010 ◽  
Author(s):  
F. Adler ◽  
P. Maslowski ◽  
A. Foltynowicz ◽  
K.C. Cossel ◽  
T.C. Briles ◽  
...  
Keyword(s):  
Fourier Transform ◽  
High Resolution ◽  
Frequency Comb ◽  
Fourier Transform Spectrometer ◽  
Mid Infrared

Analysis of stacking faults in gallium nitride by Fourier transform of high-resolution images

2014 ◽  
Vol 40 (12) ◽  
pp. 1117-1120
Author(s):  
D. A. Kirilenko ◽  
A. A. Sitnikova ◽  
A. V. Kremleva ◽  
M. G. Mynbaeva ◽  
V. I. Nikolaev
Keyword(s):  
Fourier Transform ◽  
Gallium Nitride ◽  
High Resolution ◽  
Stacking Faults ◽  
High Resolution Images

FeXIV Line Emission Polarization of the July 11, 1991 Solar Corona

1994 ◽  
Vol 144 ◽  
pp. 541-547
Author(s):  
J. Sýkora ◽  
J. Rybák ◽  
P. Ambrož
Keyword(s):  
High Resolution ◽  
Solar Corona ◽  
Emission Line ◽  
Solar Eclipse ◽  
White Light ◽  
Preliminary Analysis ◽  
Line Emission ◽  
Total Solar Eclipse ◽  
Degree Of Polarization ◽  
High Resolution Images

AbstractHigh resolution images, obtained during July 11, 1991 total solar eclipse, allowed us to estimate the degree of solar corona polarization in the light of FeXIV 530.3 nm emission line and in the white light, as well. Very preliminary analysis reveals remarkable differences in the degree of polarization for both sets of data, particularly as for level of polarization and its distribution around the Sun’s limb.

Remarks on the application of backscattered electron imaging (BEI) to the scanning electron microscopy (SEM) of biological structures

1983 ◽  
Vol 41 ◽  
pp. 484-487
Author(s):  
Etienne de Harven
Keyword(s):  
High Resolution ◽  
Incident Beam ◽  
Spot Size ◽  
Primary Electron ◽  
Critical Point Drying ◽  
Cell Shapes ◽  
High Resolution Images ◽  
Backscattered Electron ◽  
Electron Imaging ◽  
Scanning Electron

Biological ultrastructures have been extensively studied with the scanning electron microscope (SEM) for the past 12 years mainly because this instrument offers accurate and reproducible high resolution images of cell shapes, provided the cells are dried in ways which will spare them the damage which would be caused by air drying. This can be achieved by several techniques among which the critical point drying technique of T. Anderson has been, by far, the most reproducibly successful. Many biologists, however, have been interpreting SEM micrographs in terms of an exclusive secondary electron imaging (SEI) process in which the resolution is primarily limited by the spot size of the primary incident beam. in fact, this is not the case since it appears that high resolution, even on uncoated samples, is probably compromised by the emission of secondary electrons of much more complex origin.When an incident primary electron beam interacts with the surface of most biological samples, a large percentage of the electrons penetrate below the surface of the exposed cells.

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