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Full-Text Articles in Physics
Cloud Particle Size Distributions Measured With An Airborne Digital In-Line Holographic Instrument, J. P. Fugal, R. A. Shaw
Cloud Particle Size Distributions Measured With An Airborne Digital In-Line Holographic Instrument, J. P. Fugal, R. A. Shaw
Michigan Tech Publications
Holographic data from the prototype airborne digital holographic instrument HOLODEC (Holographic Detector for Clouds), taken during test flights are digitally reconstructed to obtain the size (equivalent diameters in the range 23 to 1000 μm), three-dimensional position, and two-dimensional image of ice particles and then ice particle size distributions and number densities are calculated using an automated algorithm with minimal user intervention. The holographic method offers the advantages of a well-defined sample volume size that is not dependent on particle size or airspeed, and offers a unique method of detecting shattered particles. The holographic method also allows the volume sample rate …
Sub-Mm Wave Imaging And Waveguiding Techniques For Non-Destructive Materials Evaluation, Izaak Vincent Kemp
Sub-Mm Wave Imaging And Waveguiding Techniques For Non-Destructive Materials Evaluation, Izaak Vincent Kemp
Browse all Theses and Dissertations
Sub-mm wave technology (also known as Terahertz/THz) is a rapidly developing field of electro-optics which has great potential in a variety of applications. Generally defined as the band of the electro-magnetic spectrum with frequencies spanning from 300 GHz to 30 THz, sub-mm waves are non-ionizing and are capable of passing through a wide range of dielectric substances making them well suited for imaging purposes such as non-destructive materials evaluation (NDE). Because of their high sensitivity to metals and ability to penetrate surface obscurants such as paint, oil, and epoxy sub-mm waves are capable of imaging corrosion damage on metallic surfaces …