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1.发明申请公开(公告)号：US20200271911A1
公开(公告)日：2020-08-27
申请号：US16748463
申请日：2020-01-21
Applicant: ADVANCED OPTICAL TECHNOLOGIES, INC.
Inventor： Brian G. Hoover , Jonathan H. Turner
Abstract: A polarimeter and a method of analyzing and imaging microstructural material orientation of a sample are disclosed. The polarimeter, which is a partial Mueller-matrix polarimeter (pMMP), accesses multiple independent polarization channels by employing two independent polarization modulators configured to switch serially among multiple independent settings, wherein the combination of the settings of the first and second polarization modulators defines an independent polarization channel, and wherein an imaging detector produces a set of spatially registered images that are synchronized with the channels formed by the polarization modulators; and wherein a processor connected with a memory executes a classification algorithm stored in the memory that maps the set of images to one or more material orientation images by mapping the set of values for each detector pixel corresponding to the set of spatially registered images to a value of material orientation at each pixel coordinate using a machine-learning model, an electrodynamic model, or a combination thereof. The invention can thereby create material microstructural orientation images of diverse anisotropic materials, for instance polymer domains, fiber bundles or plys, and metallic crystalline grains.
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Patent Agency Ranking
2.发明申请公开(公告)号：US20190073561A2
公开(公告)日：2019-03-07
申请号：US15542064
申请日：2016-12-22
Applicant: ADVANCED OPTICAL TECHNOLOGIES, INC.
Inventor： Brian G. Hoover , Pablo A. Reyes , David E. Taliaferro , Virgil N. Kohlhepp, III
Abstract: Embodiments of an active or laser polarimeter are disclosed that transmit multiple independent and tunable temporally-multiplexed polarization states and record or image, at video rates if necessary, the polarized intensity or irradiance reflected or transmitted by objects illuminated by those states, and apply the recorded data to material and/or object classification and recognition using classification algorithms that exploit features of polarization signatures dependent on material type, texture, and/or object shape. The polarimeter also generally records and utilizes one or more passive polarization measurements in order to realize a hybrid active-passive polarimeter. The polarimeter channels are configured and tuned to access multi-dimensional signature spaces specified by existing signature models and/or measurements, with polarization-modulator settings derived by a newly-disclosed subspace-projection algorithm that maximizes a target contrast parameter. Multiple independent polarization channels allow the new polarimeter to outperform conventional two-channel polarimeters, while the subspace-projection algorithm allows the number of channels to be minimized in order to minimize sensor size, weight, and power (SWaP) and maximize speed. Multiple channels are realized by multiplexing among independent transmitter polarization states with one or more high-speed multiplexers, in one embodiment a set of fold-mirror assemblies in the transmitter among which the laser beam is switched by one or more galvanometer scanners fitted in one embodiment with a newly-disclosed composite mirror. The method for material and object classification and recognition includes the maximally-biased classifier derived by the subspace-projection algorithm applied to a single target Mueller matrix, and methods to generalize the classifier.
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3.发明申请公开(公告)号：US20180181839A1
公开(公告)日：2018-06-28
申请号：US15542064
申请日：2016-12-22
Applicant: ADVANCED OPTICAL TECHNOLOGIES, INC.
Inventor： Brian G. Hoover , Pablo A. Reyes , David E. Taliaferro , Virgil N. Kohlhepp, III
Abstract: Embodiments of an active or laser polarimeter are disclosed that transmit multiple independent and tunable temporally-multiplexed polarization states and record or image, at video rates if necessary, the polarized intensity or irradiance reflected or transmitted by objects illuminated by those states, and apply the recorded data to material and/or object classification and recognition using classification algorithms that exploit features of polarization signatures dependent on material type, texture, and/or object shape. The polarimeter also generally records and utilizes one or more passive polarization measurements in order to realize a hybrid active-passive polarimeter. The polarimeter channels are configured and tuned to access multi-dimensional signature spaces specified by existing signature models and/or measurements, with polarization-modulator settings derived by a newly-disclosed subspace-projection algorithm that maximizes a target contrast parameter. Multiple independent polarization channels allow the new polarimeter to outperform conventional two-channel polarimeters, while the subspace-projection algorithm allows the number of channels to be minimized in order to minimize sensor size, weight, and power (SWaP) and maximize speed. Multiple channels are realized by multiplexing among independent transmitter polarization states with one or more high-speed multiplexers, in one embodiment a set of fold-mirror assemblies in the transmitter among which the laser beam is switched by one or more galvanometer scanners fitted in one embodiment with a newly-disclosed composite mirror. The method for material and object classification and recognition includes the maximally-biased classifier derived by the subspace-projection algorithm applied to a single target Mueller matrix, and methods to generalize the classifier.
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4.发明公开公开(公告)号：US20240142758A1
公开(公告)日：2024-05-02
申请号：US18407012
申请日：2024-01-08
Applicant: ADVANCED OPTICAL TECHNOLOGIES, INC.
Inventor： Brian G. Hoover , Jonathan H. Turner
CPC classification number: G02B21/0092 , G01J4/04 , G01N21/21 , G01N2021/8477 , G02B21/0068
Abstract: A polarimeter and a method of analyzing and imaging microstructural material orientation of a polished reflective sample are disclosed. The polarimeter, which is a partial Mueller-matrix polarimeter (pMMP), accesses multiple independent polarization channels by employing two independent polarization modulators configured to switch serially among multiple independent settings, wherein the combination of the settings of the first and second polarization modulators defines an independent polarization channel, and wherein an imaging detector produces a set of polarization images that are synchronized with the channels formed by the polarization modulators; and wherein a processor connected with a memory executes a classification algorithm stored in the memory that maps the set of polarization images to one or more material orientation images by mapping the set of values for each detector pixel corresponding to the set of polarization images to a value of material orientation at each pixel coordinate using a model. The invention can thereby create material microstructural orientation images of diverse anisotropic materials, for instance polymer domains, fiber bundles or plys, and crystalline grains.
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5.发明授权公开(公告)号：US11867891B2
公开(公告)日：2024-01-09
申请号：US16748463
申请日：2020-01-21
Applicant: ADVANCED OPTICAL TECHNOLOGIES, INC.
Inventor： Brian G. Hoover , Jonathan H. Turner
CPC classification number: G02B21/0092 , G01J4/04 , G01N21/21 , G01N2021/8477 , G02B21/0068
Abstract: A polarimeter and a method of analyzing and imaging microstructural material orientation of a sample are disclosed. The polarimeter, which is a partial Mueller-matrix polarimeter (pMMP), accesses multiple independent polarization channels by employing two independent polarization modulators configured to switch serially among multiple independent settings, wherein the combination of the settings of the first and second polarization modulators defines an independent polarization channel, and wherein an imaging detector produces a set of spatially registered images that are synchronized with the channels formed by the polarization modulators; and wherein a processor connected with a memory executes a classification algorithm stored in the memory that maps the set of images to one or more material orientation images by mapping the set of values for each detector pixel corresponding to the set of spatially registered images to a value of material orientation at each pixel coordinate using a machine-learning model, an electrodynamic model, or a combination thereof. The invention can thereby create material microstructural orientation images of diverse anisotropic materials, for instance polymer domains, fiber bundles or plys, and metallic crystalline grains.
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公开(公告)号：US10540571B2
公开(公告)日：2020-01-21
申请号：US15542064
申请日：2016-12-22
Applicant: ADVANCED OPTICAL TECHNOLOGIES, INC.
Inventor： Brian G. Hoover , Pablo A. Reyes , David E. Taliaferro , Virgil N. Kohlhepp, III
Abstract: Embodiments of an active or laser polarimeter are disclosed that transmit multiple independent and tunable temporally-multiplexed polarization states and record or image, at video rates if necessary, the polarized intensity or irradiance reflected or transmitted by objects illuminated by those states, and apply the recorded data to material and/or object classification and recognition using classification algorithms that exploit features of polarization signatures dependent on material type, texture, and/or object shape. The polarimeter also generally records and utilizes one or more passive polarization measurements in order to realize a hybrid active-passive polarimeter. The polarimeter channels are configured and tuned to access multi-dimensional signature spaces specified by existing signature models and/or measurements, with polarization-modulator settings derived by a newly-disclosed subspace-projection algorithm that maximizes a target contrast parameter. Multiple independent polarization channels allow the new polarimeter to outperform conventional two-channel polarimeters, while the subspace-projection algorithm allows the number of channels to be minimized in order to minimize sensor size, weight, and power (SWaP) and maximize speed. Multiple channels are realized by multiplexing among independent transmitter polarization states with one or more high-speed multiplexers, in one embodiment a set of fold-mirror assemblies in the transmitter among which the laser beam is switched by one or more galvanometer scanners fitted in one embodiment with a newly-disclosed composite mirror. The method for material and object classification and recognition includes the maximally-biased classifier derived by the subspace-projection algorithm applied to a single target Mueller matrix, and methods to generalize the classifier.
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