Patents by Inventor Subrata Sanyal
Subrata Sanyal has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11953566Abstract: Disclosed are apparatus and methods for sensing and measurement of magnetic fields that are insensitive to temperature, and respond linearly to the magnitude of the magnetic field. In particular, the apparatus and methods include the use of a resistance network including at least one fluorinated graphene foam (FGF) magnetoresistive device. Measurement of a voltage drop across at least one FGF magnetoresistive device is correlated to either merely the presence of a magnetic field or for measurement of at least a scalar magnitude value of the magnetic field. The use of FGF affords both temperature-insensitivity and linear magnetic field responsivity.Type: GrantFiled: August 25, 2022Date of Patent: April 9, 2024Assignee: The United States of America, as Represented by the Secretary of the NavyInventors: Paymon Shirazi, Subrata Sanyal
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Publication number: 20240069125Abstract: Disclosed are apparatus and methods for sensing and measurement of magnetic fields that are insensitive to temperature, and respond linearly to the magnitude of the magnetic field. In particular, the apparatus and methods include the use of a resistance network including at least one fluorinated graphene foam (FGF) magnetoresistive device. Measurement of a voltage drop across at least one FGF magnetoresistive device is correlated to either merely the presence of a magnetic field or for measurement of at least a scalar magnitude value of the magnetic field. The use of FGF affords both temperature-insensitivity and linear magnetic field responsivity.Type: ApplicationFiled: August 25, 2022Publication date: February 29, 2024Applicant: The United States of America, as represented by the Secretary of the NavyInventors: Paymon Shirazi, Subrata Sanyal
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Publication number: 20230296526Abstract: Provided is a portable biosensor that includes a sample filter cartridge, a filter collector, an optical sphere, an electromagnetic radiation emitter, a photo-detector, a processor, a signal display, a vacuum pump, and a power supply. The sample filter cartridge selectively removes small molecules to minimize spectral interference in the detection signal. The sample is concentrated onto the filter collector and subjected to illumination by the electromagnetic radiation emitter, producing Raman-scattering. The optical sphere collects and distributes the Raman-scattering shifts, which then pass through a spectral filter to produce spectral filtered scattering, which is then reflected by the concave holographic flat-field grating onto the photo-detector. The data is displayed graphically to provide the Raman-scattering shift data. The data is compared with a database for sample identification. The device is contained within a housing that is small enough to be easily transported for field use.Type: ApplicationFiled: March 20, 2023Publication date: September 21, 2023Applicant: The United States of America, as represented by the Secretary of the NavyInventors: Kin Chiu Ng, Subrata Sanyal
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Publication number: 20230296439Abstract: Provided is a portable biosensor that includes a sample filter cartridge, a filter collector, an optical sphere, an electromagnetic radiation emitter, a photo-detector, a processor, a signal display, a vacuum pump, and a power supply. The sample filter cartridge selectively removes small molecules to minimize spectral interference in the detection signal. The sample is concentrated onto the filter collector and subjected to illumination by the electromagnetic radiation emitter, producing Raman-scattering. The optical sphere collects and distributes the Raman-scattering shifts, which then pass through a spectral filter to produce spectral filtered scattering, which is then reflected by the concave holographic flat-field grating onto the photo-detector. The data is displayed graphically to provide the Raman-scattering shift data. The data is compared with a database for sample identification. The device is contained within a housing that is small enough to be easily transported for field use.Type: ApplicationFiled: March 20, 2023Publication date: September 21, 2023Applicant: The United States of America, as represented by the Secretary of the NavyInventors: Kin Chiu Ng, Subrata Sanyal
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Publication number: 20230258495Abstract: Exemplary embodiments include at least one modular container that can be assembled to emulate a desired atmosphere. Each container includes apertures on opposing ends of the container to allow EMR to enter and exit the container. Each container can include temperature control systems, humidity control systems, fan arrays to emulate wind/turbulence, and a plurality of sensors to measure the current conditions within the container, all of which can be installed within the container's walls.Type: ApplicationFiled: April 19, 2023Publication date: August 17, 2023Applicant: The United States of America, as represented by the Secretary of the NavyInventors: Subrata Sanyal, Joseph A. Fiordilino
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Patent number: 11662249Abstract: Exemplary embodiments include at least one modular container that can be assembled to emulate a desired atmosphere. Each container includes apertures on opposing ends of the container to allow EMR to enter and exit the container. Each container can include temperature control systems, humidity control systems, fan arrays to emulate wind/turbulence, and a plurality of sensors to measure the current conditions within the container, all of which can be installed within the containers walls.Type: GrantFiled: April 3, 2020Date of Patent: May 30, 2023Assignee: The United States of America, as Represented by the Secretary of the NavyInventors: Subrata Sanyal, Joseph A. Fiordilino
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Patent number: 11359963Abstract: The present invention relates to the design, construction, and operation of a laser air-sampling multi-spectrometer; its operation with variable laser energy to simultaneously and/or sequentially perform spectrometric techniques of LAS, LEFS, RSS, and LIBS. The combined spectrometric operation will detect gas and particulate chemicals directly in a flowing stream of air sample and/or particulate chemicals on filter collected from the flowing stream of air sample.Type: GrantFiled: July 15, 2020Date of Patent: June 14, 2022Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Kin Chiu Ng, Subrata Sanyal
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Patent number: 11258377Abstract: The present invention relates to a device which can measure, induce, and correct perturbations acting on an electromagnetic (EM) propagation source. Piezoelectric transducers are used to measure and control perturbations within a system to improve operation of an EM source. Perturbation measurements can be used to determine the environmental and system impacts on the EM source. Moreover, measurements can be used to correct or nullify perturbations applied to the EM source, through active or passive means.Type: GrantFiled: September 19, 2018Date of Patent: February 22, 2022Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Joseph A. Fiordilino, Subrata Sanyal
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Patent number: 11203160Abstract: Apparatuses and methods are provided that provide adaptive multi-process additive manufacturing systems for monitoring, measuring, and controlling additive manufacturing processes. A first laser (e.g., a fiber laser) is used for melting and consolidating the powder, and a second laser is utilized for dual purpose: (a) for metrology to measure the surface roughness, dimensional accuracy, material properties, etc., and (b) based on the evaluated measurements to take corrective actions (laser ablation, etc.) to attain the desired surface finish and dimensional accuracy. Various elements provide defect detection, defect identification, and defect response actions which remove defect related material or address under print or missing material in a build object.Type: GrantFiled: March 29, 2019Date of Patent: December 21, 2021Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Hitesh D Vora, Subrata Sanyal
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Patent number: 11193834Abstract: The present invention relates to a system for measuring the power of electromagnetic radiation (EMR) using piezoelectric transducers (PZTs) and pyroelectric transducers (PRTs). According to an illustrative embodiment of the present disclosure, a target cell has a mirrored surface that can partially reflect and partially absorb EMR. Each target cell can include or be coupled to PZTs and PRTs. When incident EMR reflects off of targets cells, the reflected portion creates radiation pressure and the non-reflected portions creates heat. The PZTs convert the pressure into a first electric current, and the PRTs convert the heat into a second electric current. Measuring the first and/or second currents allows a user to calculate the original power of an EMR source. By utilizing multiple target cells placed in specially designed arrays, a user can calculate fluctuations of EMR power by time and location across the target cells.Type: GrantFiled: June 11, 2020Date of Patent: December 7, 2021Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Subrata Sanyal, Joseph A. Fiordilino
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Patent number: 11175180Abstract: The present invention relates to an optical energy meter. Illustrative embodiments of the present disclosure include a system controller, temperature sensing system, vibration sensing system, torque sensing system, graphical display system, climate control system, and vibration control system. The invention measures the radiation pressure of incident high power electromagnetic radiation. The measurement of radiation pressure can be used to determine the power of the radiation; that is, the purposes of the invention are to measure, with high precision and accuracy, and survive the power of an incident high power electromagnetic beam while minimizing size, weight, and power requirements.Type: GrantFiled: June 14, 2018Date of Patent: November 16, 2021Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Joseph A. Fiordilino, Subrata Sanyal
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Patent number: 11092545Abstract: The present invention relates to the design, construction, and operation for a diode-turret. Exemplary embodiments comprise several tens of laser diodes to function as a multiple-line radiation source. The invention further describes the construction for a socket-turret; this socket-turret will flexibly fit any numbers (limited only by the number of sockets available) of laser diodes. The invention further describes two radiation coupling-optics for the output from the turret of laser-diodes, one with an integrating sphere and another with a collimating scope. One operation method allows its user to set for any number of diode, functioning one diode at a time, sequentially, hopping from one diode to another, as a single-line radiation source for the spectrometry. Another operation method permits its user to set a group with any number of diodes, functioning several diodes simultaneously at a time, as a multiple-line radiation source for spectrometry.Type: GrantFiled: July 17, 2020Date of Patent: August 17, 2021Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Kin Chiu Ng, Subrata Sanyal
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Publication number: 20210190597Abstract: The present invention relates to a system for measuring the power of electromagnetic radiation (EMR) using piezoelectric transducers (PZTs) and pyroelectric transducers (PRTs). According to an illustrative embodiment of the present disclosure, a target cell has a mirrored surface that can partially reflect and partially absorb EMR. Each target cell can include or be coupled to PZTs and PRTs. When incident EMR reflects off of targets cells, the reflected portion creates radiation pressure and the non-reflected portions creates heat. The PZTs convert the pressure into a first electric current, and the PRTs convert the heat into a second electric current. Measuring the first and/or second currents allows a user to calculate the original power of an EMR source. By utilizing multiple target cells placed in specially designed arrays, a user can calculate fluctuations of EMR power by time and location across the target cells.Type: ApplicationFiled: June 11, 2020Publication date: June 24, 2021Applicant: The United States of America, as represented by the Secretary of the NavyInventors: Subrata Sanyal, Joseph A. Fiordilino
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Patent number: 11022489Abstract: The invention relates to a portable multi-spectrometry system for chemical and biological sensing in atmospheric air. A portable, spectrometric system integrates multiple spectroscopy theories, combines their advantageous features, and fills the gaps for their limitations. The combined spectrometry system with operations for PLS, IRAS, MAS, MFS, RSS, and MS, will detect particles and chemicals, directly and sequentially, in the same air-stream.Type: GrantFiled: March 28, 2019Date of Patent: June 1, 2021Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Kin Chiu Ng, Subrata Sanyal
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Publication number: 20210096021Abstract: Exemplary embodiments include at least one modular container that can be assembled to emulate a desired atmosphere. Each container includes apertures on opposing ends of the container to allow EMR to enter and exit the container. Each container can include temperature control systems, humidity control systems, fan arrays to emulate wind/turbulence, and a plurality of sensors to measure the current conditions within the container, all of which can be installed within the containers walls.Type: ApplicationFiled: April 3, 2020Publication date: April 1, 2021Applicant: The United States of America, as represented by the Secretary of the NavyInventors: Subrata Sanyal, Joseph A. Fiordilino
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Publication number: 20210018434Abstract: The present invention relates to the design, construction, and operation for a diode-turret. Exemplary embodiments comprise several tens of laser diodes to function as a multiple-line radiation source. The invention further describes the construction for a socket-turret; this socket-turret will flexibly fit any numbers (limited only by the number of sockets available) of laser diodes. The invention further describes two radiation coupling-optics for the output from the turret of laser-diodes, one with an integrating sphere and another with a collimating scope. One operation method allows its user to set for any number of diode, functioning one diode at a time, sequentially, hopping from one diode to another, as a single-line radiation source for the spectrometry. Another operation method permits its user to set a group with any number of diodes, functioning several diodes simultaneously at a time, as a multiple-line radiation source for spectrometry.Type: ApplicationFiled: July 17, 2020Publication date: January 21, 2021Applicant: The United States of America, as represented by the Secretary of the NavyInventors: Kin Chiu Ng, Subrata Sanyal
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Publication number: 20210018366Abstract: The present invention relates to the design, construction, and operation of a laser air-sampling multi-spectrometer; its operation with variable laser energy to simultaneously and/or sequentially perform spectrometric techniques of LAS, LEFS, RSS, and LIBS. The combined spectrometric operation will detect gas and particulate chemicals directly in a flowing stream of air sample and/or particulate chemicals on filter collected from the flowing stream of air sample.Type: ApplicationFiled: July 15, 2020Publication date: January 21, 2021Applicant: The United States of America, as represented by the Secretary of the NavyInventors: Kin Chiu Ng, Subrata Sanyal
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Publication number: 20210016509Abstract: Apparatuses and methods are provided that provide adaptive multi-process additive manufacturing systems for monitoring, measuring, and controlling additive manufacturing processes. A first laser (e.g., a fiber laser) is used for melting and consolidating the powder, and a second laser is utilized for dual purpose: (a) for metrology to measure the surface roughness, dimensional accuracy, material properties, etc., and (b) based on the evaluated measurements to take corrective actions (laser ablation, etc.) to attain the desired surface finish and dimensional accuracy. Various elements provide defect detection, defect identification, and defect response actions which remove defect related material or address under print or missing material in a build object.Type: ApplicationFiled: March 29, 2019Publication date: January 21, 2021Applicant: The United States of America, as represented by the Secretary of the NavyInventors: Hitesh D. Vora, Subrata Sanyal
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Publication number: 20190301931Abstract: The invention relates to a portable multi-spectrometry system for chemical and biological sensing in atmospheric air. A portable, spectrometric system integrates multiple spectroscopy theories, combines their advantageous features, and fills the gaps for their limitations. The combined spectrometry system with operations for PLS, IRAS, MAS, MFS, RSS, and MS, will detect particles and chemicals, directly and sequentially, in the same air-stream.Type: ApplicationFiled: March 28, 2019Publication date: October 3, 2019Inventors: Kin Chiu Ng, Subrata Sanyal
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Publication number: 20190137335Abstract: The present invention relates to an optical energy meter. Illustrative embodiments of the present disclosure include a system controller, temperature sensing system, vibration sensing system, torque sensing system, graphical display system, climate control system, and vibration control system. The invention measures the radiation pressure of incident high power electromagnetic radiation. The measurement of radiation pressure can be used to determine the power of the radiation; that is, the purposes of the invention are to measure, with high precision and accuracy, and survive the power of an incident high power electromagnetic beam while minimizing size, weight, and power requirements.Type: ApplicationFiled: June 14, 2018Publication date: May 9, 2019Applicant: The United States of America, as represented by the Secretary of the NavyInventors: Joseph A. Fiordilino, Subrata Sanyal