Patents by Inventor Edward S. Williams
Edward S. Williams 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: 10996109Abstract: Conventional etalon based spectrometers have either a limited range of evaluation wavelengths or require continuous scanning of the etalon. Conventional etalon based spectrometers also have limited contrast between the peak transmission of a frequency on resonance and the minimum transmission of a frequency off resonance. An improved optical spectrometer includes a cylindrical lens configured to converge the input beam of light in only one direction, whereby the input beam of light is focused along a focal line. Accordingly, a first etalon receives the input beam of light, and transmits a series of sub-beams, each sub-beam transmitted at a different angle from the normal, and each sub-beam including multiple frequencies based on the FSR, whereby a secondary dispersive element receives each sub-beam, and disperses each sub-beam into individual frequencies.Type: GrantFiled: October 17, 2019Date of Patent: May 4, 2021Assignee: LightMachinery Inc.Inventors: Hubert Jean-Ruel, Jesse Dean, John H. Hunter, Ian J. Miller, Edward S. Williams
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Publication number: 20210116302Abstract: Conventional etalon based spectrometers have either a limited range of evaluation wavelengths or require continuous scanning of the etalon. Conventional etalon based spectrometers also have limited contrast between the peak transmission of a frequency on resonance and the minimum transmission of a frequency off resonance. An improved optical spectrometer includes a cylindrical lens configured to converge the input beam of light in only one direction, whereby the input beam of light is focused along a focal line. Accordingly, a first etalon receives the input beam of light, and transmits a series of sub-beams, each sub-beam transmitted at a different angle from the normal, and each sub-beam including multiple frequencies based on the FSR, whereby a secondary dispersive element receives each sub-beam, and disperses each sub-beam into individual frequencies.Type: ApplicationFiled: October 17, 2019Publication date: April 22, 2021Inventors: Hubert Jean-Ruel, Jesse Dean, John H. Hunter, Ian J. Miller, Edward S. Williams
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Patent number: 10908023Abstract: A conventional spatial heterodyne spectrometer (SHS) comprises a beam splitter and a pair of diffraction gratings, one in each arm of the SHS. The beam splitter separates an input beam of light into first and second sub-beams for transmission to a respective diffraction grating, and then recombines the diffracted sub-beams for focusing onto a camera. A field widened SHS enables much larger range of input angles of the original beam to be focused onto the camera, so that a broader range of wavelengths may be collected. Increasing the range of wavelengths may be provided by one or more of the following: combining the beam splitter with a field widening prism, making one diffraction grating farther from the beam splitter than the other, and placing a plurality of diffraction gratings in each arm of the SHS.Type: GrantFiled: July 5, 2019Date of Patent: February 2, 2021Assignee: LightMachinery Inc.Inventors: John H. Hunter, Ian J. Miller, Hubert Jean-Ruel, Edward S. Williams
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Publication number: 20210003450Abstract: A conventional spatial heterodyne spectrometer (SHS) comprises a beam splitter and a pair of diffraction gratings, one in each arm of the SHS. The beam splitter separates an input beam of light into first and second sub-beams for transmission to a respective diffraction grating, and then recombines the diffracted sub-beams for focusing onto a camera. A field widened SHS enables much larger range of input angles of the original beam to be focused onto the camera, so that a broader range of wavelengths may be collected. Increasing the range of wavelengths may be provided by one or more of the following: combining the beam splitter with a field widening prism, making one diffraction grating farther from the beam splitter than the other, and placing a plurality of diffraction gratings in each arm of the SHS.Type: ApplicationFiled: July 5, 2019Publication date: January 7, 2021Inventors: John H. Hunter, Ian J. Miller, Hubert Jean-Ruel, Edward S. Williams
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Patent number: 10495513Abstract: The invention relates to a multi-resolution optical spectrometer that employs two output lenses of different focal length to provide a broad wavelength range, coarse resolution spectral measurement and a high resolution, lower range spectral measurement. Light dispersed by a virtual image phase array followed by a diffraction grating in two different dispersion orders may be separately focused by the two lenses upon to 2D detector array to provide the two measurements.Type: GrantFiled: January 17, 2018Date of Patent: December 3, 2019Assignee: LightMachinery Inc.Inventors: Hubert Jean-Ruel, John Reid, John H. Hunter, Jesse Dean, Edward S. Williams, Ian J. Miller
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Patent number: 10162186Abstract: A virtual image phase array (VIPA) includes two parallel surfaces, a first highly-reflective surface with a highly-reflective coating, and a second partially-reflective surface. The first highly-reflective surface also requires an input zone with an anti-reflection coating, which abuts the highly-reflective coating, with a transition zone therebetween. Light enters the VIPA through the input zone, and reflects back and forth between the highly and partially reflective surfaces, gradually leaking out through the partially reflective surface. To minimize the transition zone and thereby minimize the input angle of incidence and maximize the number of reflections per unit of length, the substrate coated with the highly-reflective coating is subsequently polished at an acute angle resulting in the transition zone having the same sharp angle.Type: GrantFiled: May 5, 2015Date of Patent: December 25, 2018Assignee: LightMachinery Inc.Inventors: John H. Hunter, Ian J. Miller, Shane Boisclair, Edward S. Williams, Chris Wimperis, Vaz Zastera
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Patent number: 9478934Abstract: The disclosure relates to the removal of hydrogen fluoride (HF) from an excimer laser either in operation or in standby using a metal halide salt reactor. Removal of HF is desirable because the contaminant not only absorbs laser emission, thus reducing laser power, but it is also chemically reactive, and degrades the lifetime of internal laser components. The metal halide salt reactor may be provided either in the laser vessel or in an external conduit loop.Type: GrantFiled: September 29, 2015Date of Patent: October 25, 2016Assignee: LightMachinery Inc.Inventors: Adam Donaldson, Edward S. Williams, John H. Hunter, Tekai Akuetteh, Ian J. Miller
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Publication number: 20150316764Abstract: A virtual image phase array (VIPA) includes two parallel surfaces, a first highly-reflective surface with a highly-reflective coating, and a second partially-reflective surface. The first highly-reflective surface also requires an input zone with an anti-reflection coating, which abuts the highly-reflective coating, with a transition zone therebetween. Light enters the VIPA through the input zone, and reflects back and forth between the highly and partially reflective surfaces, gradually leaking out through the partially reflective surface. To minimize the transition zone and thereby minimize the input angle of incidence and maximize the number of reflections per unit of length, the substrate coated with the highly-reflective coating is subsequently polished at an acute angle resulting in the transition zone having the same sharp angle.Type: ApplicationFiled: May 5, 2015Publication date: November 5, 2015Inventors: John H. Hunter, Ian J. MILLER, Shane BOISCLAIR, Edward S. WILLIAMS, Chris WIMPERIS, Vaz ZASTERA
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Patent number: 8929419Abstract: An excimer laser system in which the expensive noble gases are reclaimed, while the halogen gas is sacrificed, and the impurities developed during operation of the excimer laser are removed. In the approach disclosed a multi-stage gas purifier is used with a single, premix gas bottle containing a halogen-rich laser gas mixture comprising noble, buffer and halogen gas, to maintain the optimum halogen content of the laser, while also maintaining a consistent ratio of noble, buffer and halogen gases without complicated control apparatus.Type: GrantFiled: August 13, 2013Date of Patent: January 6, 2015Assignee: LightMachinery Inc.Inventors: Jesse Dean, Ian J. Miller, Edward S. Williams, John H. Hunter
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Patent number: 5081638Abstract: An excimer laser has a pair of main electrodes defining a lasing space, and a series of pairs of pre-ionization pins arranged alongside the main electrodes. These pins form preionization gaps for generating discharges that provide ultraviolet radiation to condition the gas in the lasing space. The invention consists of providing a tracker of insulating material between each pair of pins to bridge the gap and provide a tracking surface for the pre-ionization discharge.Type: GrantFiled: December 5, 1990Date of Patent: January 14, 1992Assignee: Lumonics Inc.Inventors: Glen Gallant, Edward S. Williams, Robert W. Weeks
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Patent number: 5073896Abstract: Purification of the gas mixture used in an excimer laser is carried out by cooling such mixture in a cryogenic trap to a temperature that is low enough that the lasting gas or gases (e.g. krypton, xenon, fluorine, hydrogen chloride) and the impurities are all substantially fully condensed. This temperature is nevertheless sufficiently high that the buffer gas (neon or helium or a mixture thereof) remains substantially all in gaseous form. The trap is then isolated from the laser vessel and the condensed gases therein are treated to remove at least the condensed impurities from the system. In a xenon chloride laser the condensed impurities can be effectively separated from the condensed laser gases by heating, i.e. differential distillation. After this has been done, the laser gases are returned to the laser vessel. In those instances in which such separation by differential distillation is not practicable, e.g.Type: GrantFiled: April 18, 1991Date of Patent: December 17, 1991Assignee: Lumonics Inc.Inventors: John Reid, Robert K. Brimacombe, Edward S. Williams
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Patent number: 4915913Abstract: The present application is directed to medical sterilizer device with an improved latch mechanism and method and, more particularly, to a new and improved sterilization device in the form of a sterilizer case of medical applications relative to the use of instrument sterilization and storage. The case of the invention provides an effective storage container and method for sterilizing medical instruments and/or equipment by fluid (gas or steam) techniques.Type: GrantFiled: August 6, 1986Date of Patent: April 10, 1990Assignee: Genesis Medical CorporationInventors: Edward S. Williams, John R. Herzog
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Patent number: 3939082Abstract: An improved gel-thickened lubricant, useful as a gear oil or as an antileak hydraulic oil, comprises an effective amount of a lithium soap (e.g., 0.1 to 1 percent lithium stearate) or an aluminum soap (e.g., 0.5 to 2 percent aluminum stearate), or mixtures of such soaps, and a base oil having a viscosity in the range of 70 to about 3,000 SUS at 100.degree.F (preferably with an aniline point in the range of 150.degree. to 170.degree.F when the oil is to be in contact with Buna N, etc., rubbers), said base oil comprising at least one hydrorefined naphthenic oil or a hydrocracked paraffinic oil having a viscosity in the range of 40 to 12,000 SUS at 100.degree.F. Preferably, the base oil comprises a major amount of the hydrorefined naphthenic oil and a minor amount of a solvent refined paraffinic lube, or a hydrocracked lube with a paraffinic VGC, or a bright stock, or a mixture of two or more such oils.Type: GrantFiled: June 10, 1974Date of Patent: February 17, 1976Assignee: Sun Oil Company of PennsylvaniaInventors: Edward S. Williams, William H. Reiland, John Q. Griffith, III