Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"Long wave infrared"”.
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Thermal detection in the long wave infrared and very long wave infrared regions
… as lower noise. Thermal detection in the far wave infrared region (Terahertz) remains underdeveloped, opening a door for new innovative technologies such as metamaterials. This thesis will present the design and measurements of silicon photonic microring resonators used for thermal detection. …
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Long wave infrared structured light
… affected by by common scattering mediums, long-wave infrared (also known as thermal IR) experiences less scattering, especially when scattering particles are small. This thesis proposes and demonstrates a structured light scanning approach which operates in the long-wave IR Spectrum. We …
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Long-wave infrared frequency combs based on quantum cascade lasers
… frequency metrology, noninvasive imgaing and infrared countermeasures. The LWIR region (or mid-infrared region), roughly ranging from 2-20 [mu]m, is of particular importance to spectroscopy applications, since many molecular species have their strongest rotational-vibrational absorption bands …
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Exploitation of infrared polarimetric imagery for passive remote sensing applications
Polarimetric infrared imagery has emerged over the past few decades as a candidate technology to detect manmade objects by taking advantage of the fact that smooth materials emit strong polarized electromagnetic waves, which can be remotely sensed by a specialized camera using a rotating polarizer …
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Diffusion characterization of antimony-based type-II superlattices using electron beam induced current and time-resolved photoluminescence
The infrared wavelength range is of vital importance for thermal imaging, molecular sensing, astronomy, and a variety of other health, medicine, and security and defense applications. Infrared detectors, capable of light detection in this vital wavelength range are thus of significant technological …
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Characterization of spectral response of a quantum dots-in-a-well infrared focal plane array
… InAs/InGaAs quantum dots-in-a-well (DWELL) infrared focal plane array (FPA) was undertaken and reported here. The hypothesis of the study is that the FPA will exhibit bias-tunable spectral response. Broadband and two-color performance measures of the DWELL FPA are discussed and presented. …
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THz imaging and microscopy, a multiplexed near-field TeraHertz microscope
… fast acquisition rates. In the classical THz sub-wavelength imaging with a single aperture, the image is composed by mechanically scanning the sample against a single sub-wavelength aperture. Only one pixel of the final image is acquired for every integration time of a THz photodetector which …
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Early Forest Fire Detection Using Texture Analysis of Principal Components from Multispectral Video
… are used on multispectral (red, green, blue, mid-wave infrared, and long-wave infrared) video to segment and indentify the presence of a smoke plume within a scene.</p> <p>The temporal and spectral variance of a smoke plume is captured through Principal Component Analysis (PCA) where the …
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The design and fabrication of an inp-based transistor-injected quantum cascade laser
The mid-wave infrared (MWIR) and long-wave infrared (LWIR) spectral ranges have been garnering attention for their application in a variety of fields including chemical sensing and free-space communication. Efficient and compact coherent sources in these wavelength ranges are important for enabling …
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Multispectral optical depth measurements in post-detonation high explosive fireballs
… is manufactured by Teledyne RISI. Five laser wavelengths were studied which cover the visible through long-wave infrared region of the spectrum. These 405nm, 532nm, 650nm, 1310nm and 9600nm lasers were used to probe the post-detonation fireballs for the first 5ms after initiation. The two …
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InAs/Ga(In)Sb superlattice based infrared detectors using nBn design
Infrared detectors in the mid-wave infrared (MWIR) (3-5μm) and long-wave infrared (LWIR) (8-12μm) have many applications in military, industrial and medical fields. The state-of-the-art photodetectors based on Hg1-xCdxTe (MCT) have large signal over noise ratio and their bandgap can be tuned to …
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Vanadium Oxide Microbolometers with Patterned Gold Black or Plasmonic Resonant Absorbers
… to meet the needs of the next generation of infrared detectors, which seek low power consumption and production cost without sacrificing performance. Presented here is the design, fabrication, and characterization of a microbolometer with responsivity enhanced by novel highly absorptive …
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Polarization effects in the radiometric calibration of earth remote sensing satellites
… the radiometric calibration of visible through long wave infrared Earth remote sensing satellites (0.4 through ∼15 μm). The first part of this dissertation concentrates on reviewing the current status of calibration and of polarization measurements in Earth remote sensing. It provides a …
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Novel etch studies and passivation techniques on InAs/GaSb superlattice based infrared detectors
Infrared (IR) detectors today are being utilized for a variety of imaging applications such as medical diagnostics, navigation instruments of automobiles and aircrafts, meteorological imaging, night-vision and fog/smoke imaging, surveillance, target acquisition and astronomical/space imaging. These …
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Early Forest Fire Detection via Principal Component Analysis of Spectral and Temporal Smoke Signature
… techniques on multi-spectral (visible & infrared) video. By utilizing principal component analysis (PCA) followed by spatial filtering of principal component images the location of smoke can be accurately identified over a period of exposure time with a given frame capture rate. This …
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Antimonide-based type-II superlattices for infrared detection
… of applications for the detection of mid- to long-wave infrared radiation has spurred continuous interest in new and novel technologies to replace the current generation of state-of-the-art devices such as mercury cadmium telluride (MCT) detectors. One of the more promising alternatives is the …
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Applying Rotation-Equivariant Deep Learning to Cloud and Road Segmentation in Satellite and Aerial Imagery
… cloud-climate interactions and calibrating microwave radiometers. Many existing state-of-the-art cloud detection algorithms require multispectral inputs and sometimes confuse clouds with snow, ice, or cold water. We propose deep learning models trained on visible-spectrum, long-wave infrared …
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Autonomous Navigation, Perception and Probabilistic Fire Location for an Intelligent Firefighting Robot
… fire algorithm was developed by fusing long wave infrared camera images, ultraviolet radiation sensor and Lidar. The weighted vector method was applied to avoid complex static and unexpected dynamic obstacles while moving toward the fire. This algorithm was successfully validated for a …
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Investigation of InAs/GaSb superlattice based nBn detectors and focal plane arrays
Infrared (IR) detectors are used for a variety of imaging applications, such as terrestrial surveillance, biomedical diagnostics, and target acquisition. Presently, the most common photon detectors for these applications are based on interband transitions in pn junctions made of mercury cadmium …
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