LI-COR Terrestrial Radiation Sensors
... surface. The indicated sensor response (Figure 1-1) is selected because it approximates the photosynthetic response of plants for which data are available. A silicon photodiode with an enhanced response in the visible wavelengths is used as the sensor. A visible bandpass interference filter in combi ...
... surface. The indicated sensor response (Figure 1-1) is selected because it approximates the photosynthetic response of plants for which data are available. A silicon photodiode with an enhanced response in the visible wavelengths is used as the sensor. A visible bandpass interference filter in combi ...
Theory and Practice of Scanning Optical Microscopy - X
... focal plane and along the optic axis for an annulus of finite width has been calculated by Steward [2.4, 2.5] who also showed [2.5J that the intensity distribution along the optic axis is stretched out relative to that of a circular lens, that is, the depth of field is increased. This increased dept ...
... focal plane and along the optic axis for an annulus of finite width has been calculated by Steward [2.4, 2.5] who also showed [2.5J that the intensity distribution along the optic axis is stretched out relative to that of a circular lens, that is, the depth of field is increased. This increased dept ...
Biomedical Optical Imaging
... 1.3 Swept Source / Fourier Domain OCT Imaging using Swept Lasers Swept source / Fourier domain OCT is a complementary approach to spectral / Fourier domain OCT. Spectral / Fourier domain OCT uses a broadband light source and a spectrometer to measure interference as a function of wavelength or frequ ...
... 1.3 Swept Source / Fourier Domain OCT Imaging using Swept Lasers Swept source / Fourier domain OCT is a complementary approach to spectral / Fourier domain OCT. Spectral / Fourier domain OCT uses a broadband light source and a spectrometer to measure interference as a function of wavelength or frequ ...
... passive screeners is described. This part stands out the tradeoff between spatial and radiometric resolutions taking into account the image distortion produced by placing the scenario in the near-field range of the radiometer array. In addition, the impact of the decorrelation effect in the image ha ...
Far-Field Optical Superlens
... silver slab. It has two major functions: first, it selectively enhances the evanescent waves from the object; second, it converts evanescent wave into propagating waves. (b) Far-field superlens optical microscope can be realized by insertion of a FSL between the specimen and objective of a regular o ...
... silver slab. It has two major functions: first, it selectively enhances the evanescent waves from the object; second, it converts evanescent wave into propagating waves. (b) Far-field superlens optical microscope can be realized by insertion of a FSL between the specimen and objective of a regular o ...
Conformational studies of aliphatic secondary ozonides
... Infrared absorption spectra of the reaction products were collected on a Bruker IFS 120 HR spectrometer with a 4 cm−1 resolution, using glowbar as a source. A spectral resolution up to 0.003 cm−1 was used in some experiments. Unfortunately, for 1-butene SOZ rotational structure is partly resolvable ...
... Infrared absorption spectra of the reaction products were collected on a Bruker IFS 120 HR spectrometer with a 4 cm−1 resolution, using glowbar as a source. A spectral resolution up to 0.003 cm−1 was used in some experiments. Unfortunately, for 1-butene SOZ rotational structure is partly resolvable ...
S U P E R -R E S O LV... Scientific Background on the Nobel Prize in Chemistry 2014
... mammalian cell, E. coli cell, mitochondrion, influenza virus, ribosome, GFP, thymine. In the case of light (optical) microscopy, which is, together with electron microscopy, the most important tool for the imaging of biological structures, this means that two objects within a ...
... mammalian cell, E. coli cell, mitochondrion, influenza virus, ribosome, GFP, thymine. In the case of light (optical) microscopy, which is, together with electron microscopy, the most important tool for the imaging of biological structures, this means that two objects within a ...
super-resolved fluorescence microscopy
... mammalian cell, E. coli cell, mitochondrion, influenza virus, ribosome, GFP, thymine. In the case of light (optical) microscopy, which is, together with electron microscopy, the most important tool for the imaging of biological structures, this means that two objects within a ...
... mammalian cell, E. coli cell, mitochondrion, influenza virus, ribosome, GFP, thymine. In the case of light (optical) microscopy, which is, together with electron microscopy, the most important tool for the imaging of biological structures, this means that two objects within a ...
Segmentation of UAV-based images incorporating
... University of Twente, Faculty of Geo-Information Science and Earth Observation (ITC), P.O. Box 217, 7500 AE, Enschede, The Netherlands [email protected] ...
... University of Twente, Faculty of Geo-Information Science and Earth Observation (ITC), P.O. Box 217, 7500 AE, Enschede, The Netherlands [email protected] ...
Measuring the spatiotemporal electric field of
... reference and unknown pulses into two identical fibers. The output ends of the fibers are placed close together, so that when the light diverges from them, both beams are collimated with the same spherical lens (focal length f). Because the fibers are displaced from the optic axis (with a distance d ...
... reference and unknown pulses into two identical fibers. The output ends of the fibers are placed close together, so that when the light diverges from them, both beams are collimated with the same spherical lens (focal length f). Because the fibers are displaced from the optic axis (with a distance d ...
Full text - Ward Ober Lab
... plane of focus (plane 1) of the objective lens. Previously, we had shown that the 3D fundamental limit of x0 in a conventional microscope setup deteriorates with increasing defocus distances and is symmetric about z0 = 0.2 In contrast, we see that the 3D multifocal plane fundamental limit exhibits a ...
... plane of focus (plane 1) of the objective lens. Previously, we had shown that the 3D fundamental limit of x0 in a conventional microscope setup deteriorates with increasing defocus distances and is symmetric about z0 = 0.2 In contrast, we see that the 3D multifocal plane fundamental limit exhibits a ...
High-Resolution Retinal Imaging using Adaptive Optics in a
... The work described in the remaining pages of this thesis is only a part of what the whole PhD experience is about – the easiest part to write about. Trying to describe this experience is a next-to-impossible task; so I will not attempt such a feat. It suffices to say that all the hyperbolic clichés ...
... The work described in the remaining pages of this thesis is only a part of what the whole PhD experience is about – the easiest part to write about. Trying to describe this experience is a next-to-impossible task; so I will not attempt such a feat. It suffices to say that all the hyperbolic clichés ...
Resolution scaling in STED microscopy
... demonstration of resolutions down to a few tens of nanometers in STED (Stimulated Emission Depletion) microscopy has marked the advent of far-field optical nanoscopy [5-7]. A clutch of techniques that exploit the spectral properties of fluorophores, specifically a selected pair of dark and bright st ...
... demonstration of resolutions down to a few tens of nanometers in STED (Stimulated Emission Depletion) microscopy has marked the advent of far-field optical nanoscopy [5-7]. A clutch of techniques that exploit the spectral properties of fluorophores, specifically a selected pair of dark and bright st ...
Noise analysis of spectrometers based on speckle pattern
... typically used to record the spatial pattern produced by each wavelength of interest. These patterns are used as a sort of “fingerprint” to uniquely identify an input wavelength and are stored in a transmission matrix. After calibration, recording the spatial pattern generated by an arbitrary probe ...
... typically used to record the spatial pattern produced by each wavelength of interest. These patterns are used as a sort of “fingerprint” to uniquely identify an input wavelength and are stored in a transmission matrix. After calibration, recording the spatial pattern generated by an arbitrary probe ...
Selective plane illumination microscopy techniques in
... in Box 1) to illuminate the specimen from the side. Techniques like SPIM, generally called light-sheet microscopy methods, are becoming increasingly popular because they achieve excellent resolution at high penetration depths (see Glossary in Box 1) while being minimally invasive at the same time (e ...
... in Box 1) to illuminate the specimen from the side. Techniques like SPIM, generally called light-sheet microscopy methods, are becoming increasingly popular because they achieve excellent resolution at high penetration depths (see Glossary in Box 1) while being minimally invasive at the same time (e ...
Estimation of longitudinal resolution in optical coherence
... coherence lengths from PSDs of the same spectral width, yet having varying amplitudes of spectral dips. Results show that, when a PSD with a spectral dip is approximated to a Gaussian PSD of the same center wavelength and bandwidth, it leads to incorrect values of coherence length obtained with eith ...
... coherence lengths from PSDs of the same spectral width, yet having varying amplitudes of spectral dips. Results show that, when a PSD with a spectral dip is approximated to a Gaussian PSD of the same center wavelength and bandwidth, it leads to incorrect values of coherence length obtained with eith ...
Non-linear Optical Microscopy and Spectroscopy for
... This is a method where the measured signal is analysed with respect to itself at a later time. It is used for analysing the diffusion and the number of large molecules at low concentrations, and is often used in biological environments. In this thesis, the combination of FCS and TPLSM is used for the ...
... This is a method where the measured signal is analysed with respect to itself at a later time. It is used for analysing the diffusion and the number of large molecules at low concentrations, and is often used in biological environments. In this thesis, the combination of FCS and TPLSM is used for the ...
Full-Text PDF
... of vibrational spectroscopies, infrared absorption, Raman scattering and their multiple derivative techniques to identify and characterize skin molecular structures as well as to discriminate several skin lesions [29,30]. Many works employed the use of computer-based multivariate statistical analysi ...
... of vibrational spectroscopies, infrared absorption, Raman scattering and their multiple derivative techniques to identify and characterize skin molecular structures as well as to discriminate several skin lesions [29,30]. Many works employed the use of computer-based multivariate statistical analysi ...
Scanning Transmission Electron Microscopy
... columns and have their gun at the top of the column. The pertinent optical elements are identical, and for a TEM/STEM Figure 2–1 should be regarded as being inverted. In many ways, the STEM is similar to the more widely known scanning electron microscope (SEM). An electron gun generates a beam of el ...
... columns and have their gun at the top of the column. The pertinent optical elements are identical, and for a TEM/STEM Figure 2–1 should be regarded as being inverted. In many ways, the STEM is similar to the more widely known scanning electron microscope (SEM). An electron gun generates a beam of el ...
Optical Fourier techniques for medical image processing and phase
... and M states and can be viewed as a two level system as shown in Fig. 5b. The bR can be switched between B ¡ M states at relatively low powers of milliwatts. The bR film is initially isotropic as the molecules are randomly oriented. As it is placed between a crossed polarizer (V) and analyzer (H) arr ...
... and M states and can be viewed as a two level system as shown in Fig. 5b. The bR can be switched between B ¡ M states at relatively low powers of milliwatts. The bR film is initially isotropic as the molecules are randomly oriented. As it is placed between a crossed polarizer (V) and analyzer (H) arr ...
Recent advances in diffuse optical imaging
... be studied. Thus, optical topography of the cortex represents a mapping technique analogous to electro-encephalography (EEG), which is sensitive to electrical activity in the cortex. Recent technological advances have led to the development of arrays of individual sources and detectors which can be ...
... be studied. Thus, optical topography of the cortex represents a mapping technique analogous to electro-encephalography (EEG), which is sensitive to electrical activity in the cortex. Recent technological advances have led to the development of arrays of individual sources and detectors which can be ...
Changes in spatial extent and peak double optical density of human
... pigment (MP) with age. A fundus imaging system with high spatial and spectral resolution was adapted to form an indirect ophthalmoscope. The double optical density at 490 nm of the MP as a function of the location in the retina was obtained for 33 healthy subjects (ages: 21–60 years). There was an i ...
... pigment (MP) with age. A fundus imaging system with high spatial and spectral resolution was adapted to form an indirect ophthalmoscope. The double optical density at 490 nm of the MP as a function of the location in the retina was obtained for 33 healthy subjects (ages: 21–60 years). There was an i ...
Study on high signal-to-noise ratio (SNR) silicon p
... spectral responsivity is 0.48 A/W at about 520 nm. 3.1. Optimizing the p-n junction depth xj The 1/α is penetration depth of light wavelength λ, where α is photoabsorption coefficient. For the devices whose junction depth is xj, minimum wavelength producing photoelectric effect is xj = 1/α. The abso ...
... spectral responsivity is 0.48 A/W at about 520 nm. 3.1. Optimizing the p-n junction depth xj The 1/α is penetration depth of light wavelength λ, where α is photoabsorption coefficient. For the devices whose junction depth is xj, minimum wavelength producing photoelectric effect is xj = 1/α. The abso ...
Parallelized STED fluorescence nanoscopy
... requires an n × n-fold denser pixelation and hence a recording time longer by this factor. Effective parallelization has been accomplished by spinning disc arrangements with multiple pinholes, which have permitted to increase the recording speeds in confocal microscopy [16]. Other methods have used ...
... requires an n × n-fold denser pixelation and hence a recording time longer by this factor. Effective parallelization has been accomplished by spinning disc arrangements with multiple pinholes, which have permitted to increase the recording speeds in confocal microscopy [16]. Other methods have used ...
5 The Basics of Confocal Microscopy
... number of applications that could be targeted with laser scanning confocal microscopy. Modern confocal microscopes can be considered as completely integrated electronic systems (Spring and Inoue, 1997) where the optical microscope plays a central role in a configuration that consists of one or more ...
... number of applications that could be targeted with laser scanning confocal microscopy. Modern confocal microscopes can be considered as completely integrated electronic systems (Spring and Inoue, 1997) where the optical microscope plays a central role in a configuration that consists of one or more ...
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.