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1.发明授权公开(公告)号：US11287384B2
公开(公告)日：2022-03-29
申请号：US16932601
申请日：2020-07-17
Applicant: Kaiser Optical Systems Inc.
Inventor： Timothy Norwood , Joseph B. Slater , James M. Tedesco
Abstract: A method for harmonizing the responses of a plurality of Raman analyzers includes steps of calibrating an intensity axis response of a spectrometer to a reference light source and measuring a laser wavelength of a laser using the spectrometer. The method also includes steps of measuring a fluorescence spectrum induced by the laser at the laser wavelength of a plurality of standard reference material samples using the spectrometer, measuring a temperature of each standard reference material sample while measuring the fluorescence spectrum, and correcting the fluorescence spectrum of each standard reference material sample based on the respective temperature. The method further includes steps of deploying each standard reference material sample in one of a plurality of field calibrator devices and calibrating the intensity axis of one of the Raman analyzers using one of the field calibrator devices and the corrected fluorescence spectrum of the respective standard reference material sample.
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公开(公告)号：US11035992B1
公开(公告)日：2021-06-15
申请号：US16263298
申请日：2019-01-31
Applicant: Kaiser Optical Systems Inc.
Inventor： Timothy J. Britton , James M. Tedesco
Abstract: The effective coherence length of a single-frequency, solid-state laser is limited to reduce spurious, secondary holograms in conjunction with a holographic recording. The wavelength of the laser is varied or ‘scanned’ with high precision over a very small wavelength range. In an embodiment, the temperature of the laser's resonant cavity optical bench is altered, causing the dimension of the cavity to change and the emission wavelength to move in a controlled manner. The changing wavelength is monitored at high resolution, and a feedback control loop updates the temperature set-point to keep the monitored laser wavelength moving at a desired rate of change through a desired range. As the wavelength of the laser is scanned, the phase of the holographic interference pattern is locked at a position of maximum coherence/contrast within the holographic film aperture.
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公开(公告)号：US10209130B2
公开(公告)日：2019-02-19
申请号：US15986918
申请日：2018-05-23
Applicant: Kaiser Optical Systems Inc.
Inventor： Darren Schipper , Joseph B. Slater , James M. Tedesco
Abstract: The present disclosure relates to assistive mechanisms and methods that aid an operator of a spectrometer to make spectral measurements of a sample, the measurements having a desired quality. The method enables quality spectral measurements quickly and simply, without a prior understanding of a sample's spectrum or of the details as to how the spectrum is measured. Data quality is improved, and the time required to collect the data is reduced. While a specific example of sample optic focus is disclosed in detail, the optimization of numerous other parameters is possible.
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4.发明授权公开(公告)号：US09958615B2
公开(公告)日：2018-05-01
申请号：US15410206
申请日：2017-01-19
Applicant: Kaiser Optical Systems Inc.
Inventor： James M. Tedesco
CPC classification number: G02B6/32 , G01J3/0205 , G01J3/0208 , G01J3/0218 , G01J3/024 , G01J3/44 , G02B3/0087 , G02B3/02 , G02B6/322 , G02B6/3624 , G02B6/3869 , G02B6/4201
Abstract: A monolithic optical element and system is used for collimating or focusing laser light from or to optical fibers. The optical fiber terminates in a tip that directly abuts against the first surface of the optical element. The optical element may provide a collimation or focusing function depending upon whether the abutting fiber delivers light for collimation or receives focused light from a collimated beam. The optical element may be a standard or modified barrel or drum lens, with the first and second surfaces being convex curved surfaces having the same or different radii of curvature. The end of the optical element to which the fiber abuts may have a diameter to match the inner diameter of a ferrule for positioning the fiber. A pair of the elements may be used for collimation and focusing in a Raman probehead or other optical detection system.
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5.发明申请公开(公告)号：US20170131478A1
公开(公告)日：2017-05-11
申请号：US15410206
申请日：2017-01-19
Applicant: Kaiser Optical Systems Inc.
Inventor： James M. Tedesco
CPC classification number: G02B6/32 , G01J3/0205 , G01J3/0208 , G01J3/0218 , G01J3/024 , G01J3/44 , G02B3/0087 , G02B3/02 , G02B6/322 , G02B6/3624 , G02B6/3869 , G02B6/4201
Abstract: A monolithic optical element and system is used for collimating or focusing laser light from or to optical fibers. The optical fiber terminates in a tip that directly abuts against the first surface of the optical element. The optical element may provide a collimation or focusing function depending upon whether the abutting fiber delivers light for collimation or receives focused light from a collimated beam. The optical element may be a standard or modified barrel or drum lens, with the first and second surfaces being convex curved surfaces having the same or different radii of curvature. The end of the optical element to which the fiber abuts may have a diameter to match the inner diameter of a ferrule for positioning the fiber. A pair of the elements may be used for collimation and focusing in a Raman probehead or other optical detection system.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20160356647A1
公开(公告)日：2016-12-08
申请号：US14950598
申请日：2015-11-24
Applicant: Kaiser Optical Systems Inc.
Inventor： Patrick Wiegand , James M. Tedesco , Joseph B. Slater , Francis Esmonde-White , Darren Schipper
CPC classification number: G01J3/0297 , G01J3/027 , G01J3/28 , G01J3/44 , G01N21/65
Abstract: Methods and systems for spectrometer dark correction are described which achieve more stable baselines, especially towards the edges where intensity correction magnifies any non-zero results of dark subtraction, and changes in dark current due to changes in temperature of the camera window frame are typically more pronounced. The resulting induced curvature of the baseline makes quantitation difficult in these regions. Use of the invention may provide metrics for the identification of system failure states such as loss of camera vacuum seal, drift in the temperature stabilization, and light leaks. In system aspects of the invention, a processor receives signals from a light detector in the spectrometer and executes software programs to calculate spectral responses, sum or average results, and perform other operations necessary to carry out the disclosed methods. In most preferred embodiments, the light signals received from a sample are used for Raman analysis.
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公开(公告)号：US20230048375A1
公开(公告)日：2023-02-16
申请号：US17402798
申请日：2021-08-16
Applicant: Kaiser Optical Systems Inc.
Inventor： James M. Tedesco , Sean J. Gilliam
Abstract: An optical measurement probe for capturing a spectral response through an intervening material emitting unwanted background radiation includes: a first lens configured to receive light and collimate the light into a collimated excitation beam defining a first aperture; an objective element for focusing the collimated excitation beam to a point or region in a sample through the intervening material, wherein the objective element also receives light scattered by the sample and the intervening material and collimates the scattered light into a collimated collection beam defining a second aperture; and a blocking element within the collimated collection beam for removing the light scattered by the intervening material from the collimated collection beam received from the sample, wherein the second aperture defined by the collimated collection beam is at least two times greater than the first aperture defined by the collimated excitation beam.
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公开(公告)号：US20180329196A1
公开(公告)日：2018-11-15
申请号：US15592506
申请日：2017-05-11
Applicant: Kaiser Optical Systems Inc.
Inventor： James M. Tedesco
CPC classification number: G02B23/243 , A61B1/00064 , G01J3/0208 , G01J3/0218 , G01J3/44 , G01N21/645 , G01N21/65 , G01N21/8507 , G02B23/2446 , G02B23/2469
Abstract: In one aspect of the present disclosure, improved end optics are disclosed that maximize the numerical aperture focused at a sample point while minimizing unwanted artifacts such as vignetting. The configurations also maintain centering of the excitation/collection beam on the objective if the probe tilts or bends. The disclosed configurations are particularly suited to probes wherein the excitation and/or collection paths between the probe and the laser/analyzer are coupled through multimode fibers, such as in Raman and other forms of laser spectroscopy. The disclosure includes the insertion of one or more additional lenses between the probe head and the focusing objective at the probe tip.
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9.发明申请公开(公告)号：US20180328785A1
公开(公告)日：2018-11-15
申请号：US16043652
申请日：2018-07-24
Applicant: Kaiser Optical Systems Inc.
Inventor： Patrick Wiegand , James M. Tedesco , Joseph B. Slater , Francis Esmonde-White , Darren Schipper
CPC classification number: G01J3/0297 , G01J3/027 , G01J3/28 , G01J3/44 , G01N21/65
Abstract: Methods and systems for spectrometer dark correction are described which achieve more stable baselines, especially towards the edges where intensity correction magnifies any non-zero results of dark subtraction, and changes in dark current due to changes in temperature of the camera window frame are typically more pronounced. The resulting induced curvature of the baseline makes quantitation difficult in these regions. Use of the present disclosure may provide metrics for the identification of system failure states such as loss of camera vacuum seal, drift in the temperature stabilization, and light leaks. In system aspects of the present disclosure, a processor receives signals from a light detector in the spectrometer and executes software programs to calculate spectral responses, sum or average results, and perform other operations necessary to carry out the disclosed methods. In most preferred embodiments, the light signals received from a sample are used for Raman analysis.
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公开(公告)号：US20180292266A1
公开(公告)日：2018-10-11
申请号：US15479681
申请日：2017-04-05
Applicant: Kaiser Optical Systems Inc.
Inventor： Joseph B. Slater , James M. Tedesco , Alfred Feitisch
Abstract: A radiation shield for near-infrared detectors of the type used in Raman spectroscopic systems comprises a chamber enclosing the detector and a cooling device in thermal contact with the chamber and the detector to reduce the level of unwanted radiation to which the detector would otherwise be exposed. The chamber may include a window in optical alignment with the detector, and the window may include one or more coatings to pass wavelengths in a range of interest or block radiation at wavelengths outside of this range. The shield may be enclosed in an evacuated dewar having a window which may also include one or more coatings to favor the wavelength range.
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