Photoacoustic imaging velocimetry for flow
... images. With the real-time PA imaging method, dynamic information of flow field can be acquired by imaging the moving tracers tracking in the investigated field. To realize imaging velocimetry, the position of the tracer in each reconstructed image should be scaled. In the paper, the centre of the t ...
... images. With the real-time PA imaging method, dynamic information of flow field can be acquired by imaging the moving tracers tracking in the investigated field. To realize imaging velocimetry, the position of the tracer in each reconstructed image should be scaled. In the paper, the centre of the t ...
12. CONFOCAL MICROSCOPY • Confocal microscopy can render
... Aberrations, both chromatic and geometrical, lower the resolving power of the confocal microscope. Aberration correction, adaptive optics, is a critical issue especially when operating at very high NA (current research) However, even with an instrument that is capable in principle of producing ...
... Aberrations, both chromatic and geometrical, lower the resolving power of the confocal microscope. Aberration correction, adaptive optics, is a critical issue especially when operating at very high NA (current research) However, even with an instrument that is capable in principle of producing ...
Tao Yuan, Jingzhou Xu, and Xicheng Zhang Rensselaer
... Rensselaer Polytechnic Institute, Troy, New York ...
... Rensselaer Polytechnic Institute, Troy, New York ...
Get PDF - OSA Publishing
... By convenience, we use the hyperbolic metalens, which comprises a metal plasmonic waveguide coupler (PWC) (gray structure in Fig. 2(a) and 2(c)) and plasmonic metamaterials with hyperbolic dispersion (εx’ >0, εz’ <0), as a specific example to illustrate the new imaging paradigm. Such a hyperbolic me ...
... By convenience, we use the hyperbolic metalens, which comprises a metal plasmonic waveguide coupler (PWC) (gray structure in Fig. 2(a) and 2(c)) and plasmonic metamaterials with hyperbolic dispersion (εx’ >0, εz’ <0), as a specific example to illustrate the new imaging paradigm. Such a hyperbolic me ...
JBO Letters Towards noncontact skin melanoma selection by
... with the surrounding healthy skin of the same person. Multispectral scanning in the range 450 to 950 nm offers such a possibility, and a huge number of spectra from the studied pathologies were collected. To characterize the basic spectral features for each group of the malformations, the averaged s ...
... with the surrounding healthy skin of the same person. Multispectral scanning in the range 450 to 950 nm offers such a possibility, and a huge number of spectra from the studied pathologies were collected. To characterize the basic spectral features for each group of the malformations, the averaged s ...
Compact Adaptive Optics Line Scanning Ophthalmoscope
... systems can be built and operated only by researchers with extensive expertise in optics, engineering, and instrumentation; AO systems have been designed and constructed for the best imaging performance possible, to the exclusion of all other factors (size, cost, complexity, ease-of-use, etc.). This ...
... systems can be built and operated only by researchers with extensive expertise in optics, engineering, and instrumentation; AO systems have been designed and constructed for the best imaging performance possible, to the exclusion of all other factors (size, cost, complexity, ease-of-use, etc.). This ...
C. Huang, X. Wu, H. Liu, B. Aldalali, J.A. Rogers and H. Jiang
... some decapods (e.g. shrimps, lobsters, and crayfish) are also known to possess superior optical properties such as minimum chromatic aberration and enhanced sensitivity to light,[8–10] owing to their unique lens-free, reflection-based imaging mechanism first discovered by Vogt.[11] These fascinating ...
... some decapods (e.g. shrimps, lobsters, and crayfish) are also known to possess superior optical properties such as minimum chromatic aberration and enhanced sensitivity to light,[8–10] owing to their unique lens-free, reflection-based imaging mechanism first discovered by Vogt.[11] These fascinating ...
IMAGING WITH THZ PULSES TX 7725
... limited in scope. Average received power or arrival time shifts were often used to determine a false color image. This paper focuses on improving the THz system sensitivity through interferometry and generating spectroscopic estimations using digital signal processing. ...
... limited in scope. Average received power or arrival time shifts were often used to determine a false color image. This paper focuses on improving the THz system sensitivity through interferometry and generating spectroscopic estimations using digital signal processing. ...
Single-pulse coherent anti-Stokes Raman scattering microscopy
... achieved. We apply FT-CARS microspectroscopy to imaging an unstained HeLa cell and obtain multi-spectral images from the CARS spectra. We also show that the difference between CARS spectra can be quantified by a normalized spectral correlation (NSC) technique, with which identification of specific o ...
... achieved. We apply FT-CARS microspectroscopy to imaging an unstained HeLa cell and obtain multi-spectral images from the CARS spectra. We also show that the difference between CARS spectra can be quantified by a normalized spectral correlation (NSC) technique, with which identification of specific o ...
Experimental studies of far-field superlens for sub-diffractional optical imaging
... In order to obtain a high resolution image, the three overlapped frequency components have to be separated and relocated to its original position. This can be done by taking multiple measurements with relative phase-shift between the object and the grating and followed by a data processing procedure ...
... In order to obtain a high resolution image, the three overlapped frequency components have to be separated and relocated to its original position. This can be done by taking multiple measurements with relative phase-shift between the object and the grating and followed by a data processing procedure ...
ert 245:geomatic engineering remote sensing: energy sources
... spatial resolution than photographs but can gather spectral data over wide spectral ranges that enable a wide variety of imaging processing, mineral, and geologic identification. These remote sensing systems include satellites, such as Landsat, airborne sensors carried on aircraft, andspectrometers ...
... spatial resolution than photographs but can gather spectral data over wide spectral ranges that enable a wide variety of imaging processing, mineral, and geologic identification. These remote sensing systems include satellites, such as Landsat, airborne sensors carried on aircraft, andspectrometers ...
Partially coherent image formation with x
... X-ray microscopy is a unique technique that extends visible light microscopy to higher resolution and makes use of unique contrast mechanisms. It does not compete with techniques such as electron microscopy in terms of resolution but rather offers unique advantages including the ability to image sam ...
... X-ray microscopy is a unique technique that extends visible light microscopy to higher resolution and makes use of unique contrast mechanisms. It does not compete with techniques such as electron microscopy in terms of resolution but rather offers unique advantages including the ability to image sam ...
Mineral Mapping Technologies Group Internal Report No
... mineralogies. A number of these minerals can also be detected efficiently using remote sensing systems that operate at shorter wavelength, such as AVIRIS. This study, therefore, also investigates the similarity and complementary nature of the results from the TIR and the shortwave infrared wavelengt ...
... mineralogies. A number of these minerals can also be detected efficiently using remote sensing systems that operate at shorter wavelength, such as AVIRIS. This study, therefore, also investigates the similarity and complementary nature of the results from the TIR and the shortwave infrared wavelengt ...
Sample pages 1 PDF
... energy as they pass through the sample. Forming a spectrum of these electrons as a function of the energy lost leads to electron energy loss spectroscopy (EELS). (iv) X-rays generated from electron excitations in the sample (EDX). Post-specimen optics may also be present to control the angles subten ...
... energy as they pass through the sample. Forming a spectrum of these electrons as a function of the energy lost leads to electron energy loss spectroscopy (EELS). (iv) X-rays generated from electron excitations in the sample (EDX). Post-specimen optics may also be present to control the angles subten ...
(FT-IR) Microspectroscopic Measurements of Intact Spheres
... An infrared spectrum recorded from a microscopic sample depends on spectral properties of the constituent material as well as on morphology. Many samples or domains within heterogeneous materials can be idealized as spheres, in which both scattering and absorption from the three-dimensional shape af ...
... An infrared spectrum recorded from a microscopic sample depends on spectral properties of the constituent material as well as on morphology. Many samples or domains within heterogeneous materials can be idealized as spheres, in which both scattering and absorption from the three-dimensional shape af ...
Image Quality Criteria - University of Arizona
... MTF is plotted as modulation (contrast) versus spatial frequency. This metric is most useful for application intended to image extended scenes. It gives you the ability to understand how other aspects of the imaging system like the detector will affect image quality. Figure 4 shows the utility of th ...
... MTF is plotted as modulation (contrast) versus spatial frequency. This metric is most useful for application intended to image extended scenes. It gives you the ability to understand how other aspects of the imaging system like the detector will affect image quality. Figure 4 shows the utility of th ...
Speech Processing Under Adverse Listening Conditions
... sensorineural loss and to implement these techniques using a low-power DSP chip for real-time operation and with acceptable signal delay (< 60 ms). Here we present two techniques to reduce the adverse effects of increased spectral masking associated with sensorimeural loss. The first technique reduc ...
... sensorineural loss and to implement these techniques using a low-power DSP chip for real-time operation and with acceptable signal delay (< 60 ms). Here we present two techniques to reduce the adverse effects of increased spectral masking associated with sensorimeural loss. The first technique reduc ...
440400 - IDEALS @ Illinois
... In phenol-benzene complexes, the spectral shifts of phenolic ∆νOH increase with successive ring fluorine substitution, and the sequence follows aqueous phase acidity of the fluorophenols. This behavior is similar to what has been observed in the case of phenol-water complexes. The major contribu ...
... In phenol-benzene complexes, the spectral shifts of phenolic ∆νOH increase with successive ring fluorine substitution, and the sequence follows aqueous phase acidity of the fluorophenols. This behavior is similar to what has been observed in the case of phenol-water complexes. The major contribu ...
Figure 2. Turbo FT Laser Lineshape
... Designs & Prototypes has been developing both very small and very high speed Fourier Transform Spectrometers since 1985. There are two basic designs used in our instruments, each one ruggedized for use outside in the environment. One is a linear scan device, the Micro FT, which is optimized for opti ...
... Designs & Prototypes has been developing both very small and very high speed Fourier Transform Spectrometers since 1985. There are two basic designs used in our instruments, each one ruggedized for use outside in the environment. One is a linear scan device, the Micro FT, which is optimized for opti ...
Micro-spectrometer - Hamamatsu Photonics
... Information described in this material is current as of February, 2016. Product specifications are subject to change without prior notice due to improvements or other reasons. This document has been carefully prepared and the information contained is believed to be accurate. In rare cases, however, ...
... Information described in this material is current as of February, 2016. Product specifications are subject to change without prior notice due to improvements or other reasons. This document has been carefully prepared and the information contained is believed to be accurate. In rare cases, however, ...
Lecture 18
... (A) the plasma membrane labeled with DiI in a hippocampal neuron (15 sec) (B) mitochondria labeled with MitoTracker Red in a BS-C-1 cell (10 sec) (C) the ER labeled with ER-Tracker Red in a BS-C-1 cell (10 sec) (D) lysosomes labeled with LysoTracker Red in a BS-C-1 cell (1 sec) ...
... (A) the plasma membrane labeled with DiI in a hippocampal neuron (15 sec) (B) mitochondria labeled with MitoTracker Red in a BS-C-1 cell (10 sec) (C) the ER labeled with ER-Tracker Red in a BS-C-1 cell (10 sec) (D) lysosomes labeled with LysoTracker Red in a BS-C-1 cell (1 sec) ...
Photoacoustic microscopy with 2
... to form an image. In contrast, in our 2-m PAM, a singlemode optical fiber 共P1-460A-FC-2, Thorlabs兲 guides light to the imaging probe, which not only enables scanning the probe instead of the object to reduce motion artifacts, but also ensures that the optical beam quality is sufficient to achieve a ...
... to form an image. In contrast, in our 2-m PAM, a singlemode optical fiber 共P1-460A-FC-2, Thorlabs兲 guides light to the imaging probe, which not only enables scanning the probe instead of the object to reduce motion artifacts, but also ensures that the optical beam quality is sufficient to achieve a ...
sourcebook on remote sensing and biodiversity indicators
... final classification across study area, and location map of the study area in Chile. To increase our understanding of the invasion of A. dealbata, we analyzed the relationship between the mapped infestations with a number of data layers (e.g., roads, rivers, land use). Preliminary results derived us ...
... final classification across study area, and location map of the study area in Chile. To increase our understanding of the invasion of A. dealbata, we analyzed the relationship between the mapped infestations with a number of data layers (e.g., roads, rivers, land use). Preliminary results derived us ...
Minimum Local Emissivity Variance Retrieval of Cloud Emissivity
... New instruments such as the Atmospheric Infrared Sounder (AIRS), Interferometric Monitor for Greenhouse Gases (IMG), Geosychronous Imaging Fourier Transform Spectrometer (GIFTS), Cross-track Infrared Sounder (CrIS), Infrared Atmospheric Sounding Interferometer (IASI), the Hyperspectral Environmental ...
... New instruments such as the Atmospheric Infrared Sounder (AIRS), Interferometric Monitor for Greenhouse Gases (IMG), Geosychronous Imaging Fourier Transform Spectrometer (GIFTS), Cross-track Infrared Sounder (CrIS), Infrared Atmospheric Sounding Interferometer (IASI), the Hyperspectral Environmental ...
Persistent spectral hole burning in an organic material for temporal
... reference pattern is recorded in a persistent spectral holeburning material. The reference image has to include phase and amplitude information. In order to record a field-amplitude distribution in a quadratic photosensitive material, one usually engraves the interference pattern of a known field an ...
... reference pattern is recorded in a persistent spectral holeburning material. The reference image has to include phase and amplitude information. In order to record a field-amplitude distribution in a quadratic photosensitive material, one usually engraves the interference pattern of a known field an ...
Hyperspectral imaging
Hyperspectral imaging, like other spectral imaging, collects and processes information from across the electromagnetic spectrum. The goal of hyperspectral imaging is to obtain the spectrum for each pixel in the image of a scene, with the purpose of finding objects, identifying materials, or detecting processes.Much as the human eye sees visible light in three bands (red, green, and blue), spectral imaging divides the spectrum into many more bands. This technique of dividing images into bands can be extended beyond the visible. In hyperspectral imaging, the recorded spectra have fine wavelength resolution and cover a wide range of wavelengths.Engineers build hyperspectral sensors and processing systems for applications in astronomy, agriculture, biomedical imaging, geosciences, physics, and surveillance. Hyperspectral sensors look at objects using a vast portion of the electromagnetic spectrum. Certain objects leave unique 'fingerprints' in the electromagnetic spectrum. Known as spectral signatures, these 'fingerprints' enable identification of the materials that make up a scanned object. For example, a spectral signature for oil helps geologists find new oil fields.