Patents by Inventor Oliver Mehl

Oliver Mehl 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).

  • Patent number: 9958669
    Abstract: Various embodiments may relate to a method for operating an illuminating device with a pump radiation source for emitting pump radiation, and a phosphor wheel, on which a first phosphor for emitting first conversion light and a second phosphor for emitting second conversion light are provided, in which method the phosphor wheel rotates about a rotation axis and in the process is irradiated with the pump radiation in an irradiation region eccentrically with respect to the rotation axis in such a way that a circular track is irradiated owing to the rotation of the phosphor wheel, wherein during a 360° revolution of the phosphor wheel the first phosphor is irradiated with a first pump radiation power and the second phosphor is irradiated with a second pump radiation power, which is different than the first pump radiation power.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: May 1, 2018
    Assignee: OSRAM GMBH
    Inventor: Oliver Mehl
  • Patent number: 9904157
    Abstract: Various embodiments may relate to a method for irradiating an imaging optical system of a projector. The imaging optical system is irradiated with light of different colors from different semiconductor light sources sequentially, both with individual colors and superimposed as mixed light.
    Type: Grant
    Filed: April 17, 2013
    Date of Patent: February 27, 2018
    Assignee: OSRAM GmbH
    Inventor: Oliver Mehl
  • Patent number: 9885864
    Abstract: The invention proposes a lighting device (1) comprising a wavelength conversion arrangement (12) and a static band-stop filter (14). The wavelength conversion arrangement (12) comprises two wavelength conversion elements, which can be excited to emit conversion light by means of excitation radiation emitted by an excitation source (2). In order to increase the color space which is addressable by means of the two wavelength conversion elements, with the aid of the band-stop filter (14) the shorter dominant wavelength of the conversion light of both wavelength conversion elements is shortened and the longer dominant wavelength is lengthened. For this purpose, the peak wavelength of the band-stop filter (14) is chosen such that it lies between the two dominant wavelengths of the conversion light emitted by the two wavelength conversion elements. The use of a static band-stop filter (14) designed in this way makes it possible to dispense with separate filter elements for each wavelength conversion element.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: February 6, 2018
    Assignee: OSRAM GmbH
    Inventor: Oliver Mehl
  • Patent number: 9732943
    Abstract: The lighting device (11) has at least one light generation device (12) for generating a primary light (P), a first luminophore (16) for converting the wavelength of the primary light (P) to a first secondary light (S1), and a second luminophore (20) for converting the wavelength of the primary light (P) to a second secondary light (S2), the first luminophore (16) being located on a movable support (15), which is provided in order to alternatively move the first luminophore into and out of a beam path of the primary light (P), and the second luminophore being located on a stationary support (21). The invention also relates to a method for generating wavelength-converted secondary light from primary light with alternating irradiation of a first luminophore located on a movable support and of a second luminophore located on a stationary support by the primary light.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: August 15, 2017
    Assignee: OSRAM GmbH
    Inventors: Oliver Mehl, Holger Laabs, Josef Kroell
  • Patent number: 9726881
    Abstract: The invention proposes a lighting device (1) comprising a wavelength conversion arrangement (12) and a static band-stop filter (14). The wavelength conversion arrangement (12) comprises two wavelength conversion elements, which can be excited to emit conversion light by means of excitation radiation emitted by an excitation source (2). In order to increase the color space which is addressable by means of the two wavelength conversion elements, with the aid of the band-stop filter (14) the shorter dominant wavelength of the conversion light of both wavelength conversion elements is shortened and the longer dominant wavelength is lengthened. For this purpose, the peak wavelength of the band-stop filter (14) is chosen such that it lies between the two dominant wavelengths of the conversion light emitted by the two wavelength conversion elements. The use of a static band-stop filter (14) designed in this way makes it possible to dispense with separate filter elements for each wavelength conversion element.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: August 8, 2017
    Assignee: Osram GmbH
    Inventor: Oliver Mehl
  • Patent number: 9726346
    Abstract: A light module includes a wavelength conversion element and an excitation radiation source to emit excitation radiation having the first wavelength and arranged such that excitation radiation emitted by the excitation radiation source can be radiated onto the wavelength conversion element. The element has an emission spectrum having a red spectral component and a second dominant wavelength, which is less than a first dominant wavelength of the wavelength spectrum of the light to be generated by a predefinable value. The light module includes a long-pass filter arranged such that light emitted by the element can be radiated onto the long-pass filter. The long-pass filter is designed to filter the light emitted by the element and radiated onto the long-pass filter such that the filtered light has the wavelength spectrum of the light to be generated having the predefinable dominant wavelength.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: August 8, 2017
    Assignee: Osram GmbH
    Inventors: Peter Hoehmann, Oliver Mehl
  • Publication number: 20170172660
    Abstract: An irradiation unit for providing radiation pulses for irradiating a skin surface is provided. The irradiation unit includes a light source unit configured to provide the radiation pulses with a specifiable pulse duration, with a specifiable pulse height and with a specifiable temporal pulse spacing. The light source unit is furthermore configured to illuminate a region of the skin surface of a predetermined size at a predetermined distance from the light source unit in a main radiation direction of the light source unit. The light source unit includes at least one solid-state light source. The irradiation unit further includes a sensor unit and a control device for driving the at least one solid-state light source.
    Type: Application
    Filed: December 20, 2016
    Publication date: June 22, 2017
    Inventors: Oliver Mehl, Holger Laabs
  • Patent number: 9677720
    Abstract: A lighting device comprising a phosphor wheel configured such that it temporarily sequentially not only emits the excitation light in a wavelength-converted fashion as conversion light but additionally reflects said excitation light in an unconverted fashion as reflection light. Conversion light and reflection light are guided spatially separately on a conversion light path and reflection light path, respectively, with the aid of a first dichroic mirror and are finally combined with the aid of a second dichroic mirror. In this way, it is possible to combine the reflection light for example as a blue light channel with the conversion light.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: June 13, 2017
    Assignee: OSRAM GmbH
    Inventors: Stefan Hadrath, Oliver Mehl
  • Publication number: 20170068089
    Abstract: Various embodiments may relate to a method for operating an illuminating device with a pump radiation source for emitting pump radiation, and a phosphor wheel, on which a first phosphor for emitting first conversion light and a second phosphor for emitting second conversion light are provided, in which method the phosphor wheel rotates about a rotation axis and in the process is irradiated with the pump radiation in an irradiation region eccentrically with respect to the rotation axis in such a way that a circular track is irradiated owing to the rotation of the phosphor wheel, wherein during a 360° revolution of the phosphor wheel the first phosphor is irradiated with a first pump radiation power and the second phosphor is irradiated with a second pump radiation power, which is different than the first pump radiation power.
    Type: Application
    Filed: April 29, 2015
    Publication date: March 9, 2017
    Inventor: Oliver Mehl
  • Publication number: 20170015901
    Abstract: There is herein described a ceramic phosphor target which may be used in a laser-activated remote phosphor application. The target comprises a substantially flat ceramic phosphor converter comprised of a photoluminescent polycrystalline ceramic which is attached to a reflective metal substrate by a high thermal conductivity adhesive.
    Type: Application
    Filed: January 26, 2015
    Publication date: January 19, 2017
    Applicants: OSRAM SYLVANIA Inc., OSRAM GmbH
    Inventors: Alan Lenef, James Avallon, John Kelso, Maxim Tchoul, Yi Zheng, Oliver Mehl, Peter Hoehmann, Markus Stange, Tobias Gleitsmann
  • Patent number: 9476573
    Abstract: Various embodiments relate to a lighting apparatus including at least one light generating device for generating primary light, and at least one phosphor wheel arranged optically downstream of the light generating device. The phosphor wheel may include at least one phosphor for wavelength conversion of the primary light into secondary light. A plurality of phosphor wheels are arranged optically downstream of the light generating device.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: October 25, 2016
    Assignee: OSRAM GMBH
    Inventor: Oliver Mehl
  • Patent number: 9223196
    Abstract: A lighting device comprising a pump light source and two or more phosphor wheels arranged one directly behind another. As a result, firstly, the heat loss can be dissipated via the two phosphor wheels. Secondly, only a single common collecting optical unit is required for collecting the conversion light emitted by the first phosphor wheel and the second phosphor wheel.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: December 29, 2015
    Assignee: OSRAM GmbH
    Inventor: Oliver Mehl
  • Patent number: 9175829
    Abstract: Various embodiments propose an illumination apparatus having a laser apparatus and a phosphor wheel, wherein the phosphor wheel has, in addition to at least one phosphor region for phosphor conversion, at least one transmission region for colored light having a second, greater dominance wavelength from a light source. The beam paths from light source and laser apparatus are e.g. arranged collinearly, wherein the phosphor wheel rotates into the common optical axis of the laser apparatus and light source. By adding colored light having a greater dominance wavelength, the dominance wavelength of a colored light channel that is required for projection applications can also be obtained with colored light converted using efficient phosphor having a dominance wavelength that is too small.
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: November 3, 2015
    Assignee: OSRAM GmbH
    Inventor: Oliver Mehl
  • Patent number: 9170423
    Abstract: A light module for a projection apparatus, comprising a laser apparatus adapted to emit linearly polarized radiation in the blue wavelength range, a luminous wheel arranged in the beam path of the radiation emitted by the laser apparatus, a first beam splitter arranged in the beam path of the radiation emitted by the laser apparatus between the laser apparatus and the luminous wheel, a focusing apparatus arranged in the beam path of the radiation emitted by the laser apparatus between the first beam splitter and the luminous wheel, and at least one polarization manipulation apparatus, adapted to rotate the polarization of radiation that has passed through it twice in different directions through 90°, wherein the first beam splitter is arranged such that it is also located in the beam path of radiation in the blue wavelength range which has passed twice through the polarization manipulation apparatus in different directions.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: October 27, 2015
    Assignee: OSRAM GmbH
    Inventor: Oliver Mehl
  • Publication number: 20150267880
    Abstract: A lighting device comprising a phosphor wheel configured such that it temporarily sequentially not only emits the excitation light in a wavelength-converted fashion as conversion light but additionally reflects said excitation light in an unconverted fashion as reflection light. Conversion light and reflection light are guided spatially separately on a conversion light path and reflection light path, respectively, with the aid of a first dichroic mirror and are finally combined with the aid of a second dichroic mirror. In this way, it is possible to combine the reflection light for example as a blue light channel with the conversion light.
    Type: Application
    Filed: February 5, 2015
    Publication date: September 24, 2015
    Applicant: OSRAM GMBH
    Inventors: Stefan Hadrath, Oliver Mehl
  • Publication number: 20150124430
    Abstract: The invention proposes a lighting device (1) comprising a wavelength conversion arrangement (12) and a static band-stop filter (14). The wavelength conversion arrangement (12) comprises two wavelength conversion elements, which can be excited to emit conversion light by means of excitation radiation emitted by an excitation source (2). In order to increase the color space which is addressable by means of the two wavelength conversion elements, with the aid of the band-stop filter (14) the shorter dominant wavelength of the conversion light of both wavelength conversion elements is shortened and the longer dominant wavelength is lengthened. For this purpose, the peak wavelength of the band-stop filter (14) is chosen such that it lies between the two dominant wavelengths of the conversion light emitted by the two wavelength conversion elements. The use of a static band-stop filter (14) designed in this way makes it possible to dispense with separate filter elements for each wavelength conversion element.
    Type: Application
    Filed: October 31, 2014
    Publication date: May 7, 2015
    Inventor: Oliver Mehl
  • Publication number: 20150062540
    Abstract: Various embodiments may relate to a method for irradiating an imaging optical system of a projector. The imaging optical system is irradiated with light of different colors from different semiconductor light sources sequentially, both with individual colors and superimposed as mixed light.
    Type: Application
    Filed: April 17, 2013
    Publication date: March 5, 2015
    Inventor: Oliver Mehl
  • Publication number: 20150049456
    Abstract: A light module includes a wavelength conversion element and an excitation radiation source to emit excitation radiation having the first wavelength and arranged such that excitation radiation emitted by the excitation radiation source can be radiated onto the wavelength conversion element. The element has an emission spectrum having a red spectral component and a second dominant wavelength, which is less than a first dominant wavelength of the wavelength spectrum of the light to be generated by a predefinable value. The light module includes a long-pass filter arranged such that light emitted by the element can be radiated onto the long-pass filter. The long-pass filter is designed to filter the light emitted by the element and radiated onto the long-pass filter such that the filtered light has the wavelength spectrum of the light to be generated having the predefinable dominant wavelength.
    Type: Application
    Filed: July 15, 2014
    Publication date: February 19, 2015
    Inventors: Peter Hoehmann, Oliver Mehl
  • Publication number: 20140369025
    Abstract: Various embodiments relate to a lighting apparatus including at least one light generating device for generating primary light, and at least one phosphor wheel arranged optically downstream of the light generating device. The phosphor wheel may include at least one phosphor for wavelength conversion of the primary light into secondary light.
    Type: Application
    Filed: January 8, 2013
    Publication date: December 18, 2014
    Inventor: Oliver Mehl
  • Publication number: 20140328044
    Abstract: The lighting device (11) has at least one light generation device (12) for generating a primary light (P), a first luminophore (16) for converting the wavelength of the primary light (P) to a first secondary light (S1), and a second luminophore (20) for converting the wavelength of the primary light (P) to a second secondary light (S2), the first luminophore (16) being located on a movable support (15), which is provided in order to alternatively move the first luminophore into and out of a beam path of the primary light (P), and the second luminophore being located on a stationary support (21). The invention also relates to a method for generating wavelength-converted secondary light from primary light with alternating irradiation of a first luminophore located on a movable support and of a second luminophore located on a stationary support by the primary light.
    Type: Application
    Filed: September 20, 2012
    Publication date: November 6, 2014
    Inventors: Oliver Mehl, Holger Laabs, Josef Kroell