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 3745 for “"Infrared"”.
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INFRARED PRESENSITIZATION PHOTOGRAPHY.
Infrared presensitization photography (IRPP) is a double exposure technique that allows the recording of IR information on standard silver halide films not ordinarily sensitive in this long wavelength regime. This dissertation prescribes conditions for the practical implementation of the IRPP …
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Infrared spectrum of hafnium
The construction and operation of microwave excited hafnium discharge tubes is described.
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Integrated infrared sensor platform
Infrared spectrum, especially mid-infrared range (2.512tm) covers the absorption peaks of many important chemicals including carbon monoxide, methane and water vapor. By analyzing the absorption spectrum of achemical, one can measure the concentration of the chemicals as well as distinguish the …
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Thermal detection in the long wave infrared and very long wave infrared regions
… 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. The …
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Characterizing Organic Coatings on Renaissance Bronzes with Short-Wave Infrared and Mid-Infrared Spectroscopy
… external reflection Fourier transform infrared spectroscopy (ER-FTIR) and fibre optic reflectance spectroscopy (FORS)—across the visible/near-infrared (VIS-NIR, ~400–1000 nm), short-wave infrared (SWIR, ~1000–2500 nm), and mid-infrared (MIR, ~2.5–25 μm) ranges. Twenty-six reference …
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Next generation near infrared (NIR) and shortwave infrared (SWIR) wearables for breast cancer imaging
… inexpensive technology uses near or shortwave infrared (NIR or SWIR) light to illuminate tissue, and detects multiply-scattered photons. However, bulky instrumentation and complicated imaging procedures have limited the clinical adoption of this technology. Furthermore, measured biomarkers …
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Development of microcantilever mid-infrared detectors and sources and their application in infrared spectroscopy
Mid-infrared (mid-IR) light is an electromagnetic radiation with the wavelengths of 3 – 30 um. This spectral range includes the dominant wavelengths of the thermal radiation emitted by objects at or near room temperature, and vibrational and rotational resonance frequencies of many molecules. The …
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The Wide-Field Infrared Transient Explorer (WINTER): a new near-infrared time-domain survey
The Wide-Field Infrared Transient Explorer (WINTER) is a new near-infrared observatory for time-domain astronomy, the study of the evolving night sky. The field has exploded in the last two decades at optical wavelengths, but complementary infrared efforts have been limited by available detector …
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Solid fuel ramjet infrared signature
… ratio (Ø) and fuel composition on the infrared signature of solid fueled ramjets (SFRJ). Solid fuels investigated were Plexiglas, HTPB, and HTPB with aluminum, silicon, boron carbide, and/or magnesium. They were tested at chamber pressures of 80-170 psia and with equivalence ratios …
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Calibration of the infrared spectrometer
LD2668 .T4 1948 C65
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Novel near-infrared absorbing dyes
New near-infrared absorbing donor-acceptor chromophores have been investigated by varying the electron donating and accepting strength of the two halves of the molecule within wide limits. The dihydroperimidine, perimidine, Michler's ethylene and 1-decyl-2(1H)- methyl-benz[c, d]indolium iodide …
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Demonstrating Reflectarray Behavior At Infrared
… technology to develop a sub-millimeter and infrared reflectarray (SMIR) would provide a highly desirable alternative to similarly behaved polished or diffractive optical devices. Compared to traditional optical reflectors, SMIRs should be cheaper to fabricate, have a smaller physical …
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INFRARED SENSORS USING SILICON MICROSTRUCTURES
… see in the dark has spurred the exploration of infrared imaging systems. There are basically two groups of detectors: photon detectors and thermal detectors. The high costs of cooling apparatus and infrared ( lR ) sensitive materials restrict the wide application of the photon detector as an IR …
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Mems approaches in infrared imaging
… novel Microelectromechanical System (MEMS) based infrared detector, that utilizes coefficient of thermal expansion, is discussed. The detector design uses a variety of thermal expansion coefficient materials, including alloys which are connected to ambient through a thermal conducting bridge. The …
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Advances in medical infrared thermography
… beginnings of medicine. Over the last few years, infrared thermography has attracted increased attention in various medical applications due to technological advancements that reduce manufacturing costs and enable high-resolution cameras with great sensitivity. The recent 2019 coronavirus disease …
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Infrared spectroscopy of interstellar grains
… subtle differences in regional chemistry. Infrared spectroscopy of interstellar grains has enabled many grain components to be identified and their importance in the ISM to be understood. An analysis of cold molecular cloud mantles has been presented in this thesis, and should provide a …
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The Far Infrared Sulfur Dioxidelaser
Made available in DSpace on 2014-12-10T19:06:46Z (GMT). No. of bitstreams: 1 7206960.pdf: 3457426 bytes, checksum: d95f235845cdb28cf8ea0a565d24cc11 (MD5) Previous issue date: 1971
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Infrared spectroscopy of photodissociated carboxymyoglobin
Infrared spectra of carbon monoxide bound myoglobin reveal several lines due only to the carbon monoxide. Studies with isotopically enriched CO confirm the assignment of these lines. After photodissociation, the lines shift and change in extinction coefficient, giving an indication of the nature of …
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