Resumes
Resumes
Michael Gehm Phones & Addresses
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626 N Scottswood Blvd, Hillsborough, NC 27278 (919) 245-8061
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Huntsville, AL
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7030 Fallen Sun Ct, Tucson, AZ 85743
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8815 Yellow Moon Dr, Tucson, AZ 85743
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2330 Bedford St, Durham, NC 27707
Business Records
Name / Title
Company / Classification
Phones & Addresses
Principal
Arizona Sensors LLC
Nonclassifiable Establishments
Nonclassifiable Establishments
8815 N Yellow Moon Dr, Tucson, AZ 85743
Publications
Us Patents
Static Two-Dimensional Aperture Coding For Multimodal Multiplex Spectroscopy
View pageUS Patent:
7301625, Nov 27, 2007
Filed:
Jan 19, 2006
Appl. No.:
11/334546
Inventors:
David Brady - Durham NC, US
Scott T. McCain - Durham NC, US
Michael E. Gehm - Durham NC, US
Michael E. Sullivan - Raleigh NC, US
Prasant Potuluri - Durham NC, US
Scott T. McCain - Durham NC, US
Michael E. Gehm - Durham NC, US
Michael E. Sullivan - Raleigh NC, US
Prasant Potuluri - Durham NC, US
Assignee:
Duke University - Durham NC
International Classification:
G01J 3/04
G01J 3/28
G01J 3/28
US Classification:
356310, 356328, 356330
Abstract:
A class of aperture coded spectrometer is optimized for the spectral characterization of diffuse sources. The instrument achieves high throughput and high spatial resolution by replacing the slit of conventional dispersive spectrometers with a spatial filter or mask. A number of masks can be used including Harmonic masks, Legendre masks, and Hadamard masks.
Coding And Modulation For Hyperspectral Imaging
View pageUS Patent:
7336353, Feb 26, 2008
Filed:
Oct 16, 2006
Appl. No.:
11/580925
Inventors:
David J. Brady - Durham NC, US
Michael E. Gehm - Durham NC, US
Michael E. Gehm - Durham NC, US
Assignee:
Duke University - Durham NC
International Classification:
G01J 3/28
G01J 3/04
G01J 3/04
US Classification:
356310, 356328, 356330
Abstract:
Embodiments of the present invention relate to systems and methods for spectral imaging. In one embodiment, an image of the scene is formed on a coded aperture of a spectrometer. A coded image from the coded aperture is detected on a two-dimensional detector array of the spectrometer through a spectrally dispersive element of the spectrometer. Data from the two-dimensional detector array is collected as the coded image is varied over time. The spectral image is estimated from the data collected and the variation of the coded image over time. The data collected is varied over time through translation, rotation, and defocus.
Coded Mass Spectroscopy Methods, Devices, Systems And Computer Program Products
View pageUS Patent:
7399957, Jul 15, 2008
Filed:
Jan 17, 2006
Appl. No.:
11/332303
Inventors:
Charles B. Parker - Mebane NC, US
David J. Brady - Durham NC, US
Jeffrey T. Glass - Durham NC, US
Michael E. Gehm - Durham NC, US
David J. Brady - Durham NC, US
Jeffrey T. Glass - Durham NC, US
Michael E. Gehm - Durham NC, US
Assignee:
Duke University - Durham NC
International Classification:
B01D 59/44
US Classification:
250281, 250282, 250284, 250286, 250287, 250299, 250300
Abstract:
A coded mass spectrometer incorporates a spatial or temporal code to reduce the resolution/sensitivity dichotomy inherent in mass spectrometry. The code is used to code one or more portions of a mass spectrometer. Coding patterns, such as Hadamard codes, Walsh codes, and perfect code sequences can be used. The coding can be spatial, for example, by using an aperture mask and/or temporal, for example, by coded injection of ions for analysis.
Static Two-Dimensional Aperture Coding For Multimodal Multiplex Spectroscopy
View pageUS Patent:
7505130, Mar 17, 2009
Filed:
Nov 19, 2007
Appl. No.:
11/942420
Inventors:
David J. Brady - Durham NC, US
Scott T. McCain - Durham NC, US
Michael E. Gehm - Marana AZ, US
Michael E. Sullivan - Raleigh NC, US
Prasant Potuluri - Raleigh NC, US
Scott T. McCain - Durham NC, US
Michael E. Gehm - Marana AZ, US
Michael E. Sullivan - Raleigh NC, US
Prasant Potuluri - Raleigh NC, US
Assignee:
Duke University - Durham NC
International Classification:
G01J 3/04
G01J 3/28
G01J 3/28
US Classification:
356310, 356328, 356330
Abstract:
A class of aperture coded spectrometer is optimized for the spectral characterization of diffuse sources. The instrument achieves high throughput and high spatial resolution by replacing the slit of conventional dispersive spectrometers with a spatial filter or mask. A number of masks can be used including Harmonic masks, Legendre masks, and Hadamard masks.
Optical Spectroscopy Utilizing Planar Spectral Filters
View pageUS Patent:
7561274, Jul 14, 2009
Filed:
Sep 18, 2006
Appl. No.:
11/532554
Inventors:
David J Brady - Durham NC, US
Bob D Guenther - Cary NC, US
Michael E Gehm - Durham NC, US
Scott T McCain - Durham NC, US
Bob D Guenther - Cary NC, US
Michael E Gehm - Durham NC, US
Scott T McCain - Durham NC, US
Assignee:
Duke University - Durham NC
International Classification:
G01B 9/02
G01J 3/45
G01J 3/45
US Classification:
356454
Abstract:
An optical spectrometer and/or a method of optical spectroscopy is described herein. One exemplary spectrometer includes a planar spectral filter, a dispersion system, and a detector array having at least two dimensions. The planar spectral filter filters incident light to generate a plurality of wavelength dependent spatial patterns. The dispersion system disperses the spatial patterns along at least one dimension in a wavelength dependent fashion onto the detector array. As a result, spatial patterns corresponding to different wavelengths are centered at different locations on the detector array. The dispersed spatial patterns superimpose at the detector array in an offset but overlapping relationship, creating an asymmetric image that facilitates the spectral analysis of a wide range of light sources, including diffuse or spectrally complex light sources.
Spatially-Registered Wavelength Coding
View pageUS Patent:
7773218, Aug 10, 2010
Filed:
Apr 16, 2007
Appl. No.:
11/735562
Inventors:
David J. Brady - Durham NC, US
Michael E. Gehm - Tucson AZ, US
Michael E. Gehm - Tucson AZ, US
Assignee:
Duke University - Durham NC
International Classification:
G01J 3/04
US Classification:
356310, 250281, 250300, 356326, 356330
Abstract:
Embodiments of the present invention relate to systems and methods for spectral imaging. Electromagnetic energy emanating from an object is passed through a first dispersive element, a coded aperture, and a second dispersive element to a detector plane. A wavelength-dependent shift is created by the first dispersive element. The coded aperture modulates the image emanating from the first dispersive element. The wavelength-dependent shift is removed from the modulated image by the second dispersive element producing a wavelength-independent image measured by the detector. A spectral image of the object is calculated from the measured image, a wavelength-dependent shift of the first dispersive element, the code of the coded aperture, and a wavelength dependent shift of the second dispersive element. A spectral image can be calculated from measurements obtained in a single time step and from a number of measurements that is less than the number of elements in the spectral image.
Optical Spectroscopy With Overlapping Images
View pageUS Patent:
20060274308, Dec 7, 2006
Filed:
Jun 5, 2006
Appl. No.:
11/422197
Inventors:
David Brady - Durham NC, US
Michael Gehm - Durham NC, US
Evan Cull - Durham NC, US
Michael Gehm - Durham NC, US
Evan Cull - Durham NC, US
International Classification:
G01J 3/28
US Classification:
356326000
Abstract:
An optical spectrometer distinguishes ambiguity between different wavelength constituent components present in incident light. A spatial filter in the spectrometer spatially filters the incident light. A dispersion system receives the spatially filtered light and disperses images of the spatial filter in a wavelength dependent fashion such that two or more wavelength-specific images at least partially overlap at a detector system. The detector system comprises a detector array and processor that detects and processes the dispersed light to remove ambiguity between one or more of the overlapping images. The detector array may detect coded aperture images associated with a coded aperture spatial filter defined by a coded aperture function, and the processor may process the detector array output signals using an analysis function that complements the coded aperture function. The detector system may filter the spatial filter images and electronically process the resulting detector array output signals.
Magnet Assembly With Improved Field Uniformity And Methods Of Making And Using Same
View pageUS Patent:
20190115202, Apr 18, 2019
Filed:
Nov 30, 2018
Appl. No.:
16/206800
Inventors:
- Durham NC, US
Jeffrey T. GLASS - Durham NC, US
Charles B. PARKER - Durham NC, US
Michael E. GEHM - Durham NC, US
Zach RUSSELL - Durham NC, US
David LANDRY - Durham NC, US
Shane DI DONA - Durham NC, US
Jeffrey T. GLASS - Durham NC, US
Charles B. PARKER - Durham NC, US
Michael E. GEHM - Durham NC, US
Zach RUSSELL - Durham NC, US
David LANDRY - Durham NC, US
Shane DI DONA - Durham NC, US
International Classification:
H01J 49/32
H01F 7/02
H01F 41/00
H01F 7/02
H01F 41/00
Abstract:
An opposed dipole magnet assembly is provided that exhibits higher magnetic field uniformity than traditional magnet assemblies, such as H-shaped magnet assemblies. The opposed dipole magnet assembly includes two permanent magnets that are spaced apart and oriented such that their respective magnetization directions are parallel. Plates formed of a high permeability material are attached to top and bottom surfaces of the two permanent magnets so as to form a hollow field region. With this geometry, the magnetic field in the hollow field region is in a direction antiparallel to the magnetic field directions of the two permanent magnets.