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公开(公告)号：US11630218B1
公开(公告)日：2023-04-18
申请号：US17141270
申请日：2021-01-05
发明人： Brian Z. Bentz , Richard Karl Harrison , Benjamin Tong Yee , Norman Kolb , Jeffrey B. Martin , Sean Donovan Fournier , Oskar Fick Searfus , Christopher Murzyn , Christopher Blair Saltonstall, Jr.
摘要： A two-dimensional imaging system and a two-dimensional or three-dimensional optical tomographic mapping system, each employing gas scintillation induced by ionizing radiation, i.e., radioluminescence, and corresponding methods, are disclosed. The systems may employ one or more cameras and corresponding UV filters (potentially solar blind filters) for imaging a radioluminescent scene. For two-dimensional or three-dimensional mapping, the resultant UV images are spatially registered with one another and then reconstructed to form a three-dimensional tomographic map of the ionizing radiation. The two-dimensional map is a plane of the three-dimensional map. The UV images may be spatially registered by using a reference source, optionally, a calibrated reference source allowing dosimetry calculations for the ionizing radiation. Molecular nitrogen is the primary candidate for the radioluminescent gas, though a controlled ambient in a chamber of nitric oxide, argon, krypton, or xenon may be employed. The reconstruction process employs an algebraic reconstruction technique or an Abel inversion.
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公开(公告)号：US11287536B1
公开(公告)日：2022-03-29
申请号：US16162756
申请日：2018-10-17
发明人： Stephen W. Howell , David W. Peters , Thomas Edwin Beechem, III , Isaac Ruiz , Richard Karl Harrison , Jeffrey B. Martin
IPC分类号： G01T1/17 , H01L27/146 , H01L31/028 , G01T1/185 , H01L31/119 , H01L29/16
摘要： A radiation field is detected or imaged using one or more junction devices in which a two-dimensional conductor layer is capacitively coupled to a semiconductor absorber layer. In the junction devices, pixel-level amplification and read-out are accomplished through the photogating of the devices by absorption within the absorber layer while it is in a state of deep depletion. When the two-dimensional conductor is graphene, we refer to a device operating in that manner as a deeply depleted graphene-oxide-semiconductor (D2GOS) detector.
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