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Patent Agency Ranking
公开(公告)号：US11240607B2
公开(公告)日：2022-02-01
申请号：US17054981
申请日：2019-05-15
Applicant: SINTEF TTO AS
Inventor： Hallvard Angelskår , Thor Bakke , Ib-Rune Johansen , Matthieu Lacolle , Jakob Vennerød , Andreas Vogl , Dag Wang
Abstract: An optical microphone assembly comprises a rigid substrate; an interferometric arrangement, a light source, at least one photo detector and an enclosure. The interferometric arrangement comprises a membrane and at least one optical element spaced from the membrane, wherein the at least one optical element comprises a surface of the substrate and/or is disposed on a surface of the substrate. The light source is arranged to provide light to the interferometric arrangement such that a first portion of the light propagates along a first optical path via the interferometric arrangement and a second portion of the light propagates along a second different optical path via the interferometric arrangement, thereby giving rise to an optical path difference between the first and second optical paths which depends on a distance between the membrane and the optical element. The photo detector(s) are arranged to detect at least part of an interference pattern generated by said first and second portions of light dependent on said optical path difference. The enclosure is arranged to form an acoustic cavity in fluid communication with one side of the membrane. The volume of the acoustic cavity is at least 3 mm multiplied by d2, where d is a diameter of the membrane.
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公开(公告)号：US20210274291A1
公开(公告)日：2021-09-02
申请号：US17054981
申请日：2019-05-15
Applicant: SINTEF TTO AS
Inventor： Hallvard Angelskår , Thor Bakke , Ib-Rune Johansen , Matthieu Lacolle , Jakob Vennerød , Andreas Vogl , Dag Wang
Abstract: An optical microphone assembly comprises a rigid substrate; an interferometric arrangement, a light source, at least one photo detector and an enclosure. The interferometric arrangement comprises a membrane and at least one optical element spaced from the membrane, wherein the at least one optical element comprises a surface of the substrate and/or is disposed on a surface of the substrate. The light source is arranged to provide light to the interferometric arrangement such that a first portion of the light propagates along a first optical path via the interferometric arrangement and a second portion of the light propagates along a second different optical path via the interferometric arrangement, thereby giving rise to an optical path difference between the first and second optical paths which depends on a distance between the membrane and the optical element. The photo detector(s) are arranged to detect at least part of an interference pattern generated by said first and second portions of light dependent on said optical path difference. The enclosure is arranged to form an acoustic cavity in fluid communication with one side of the membrane. The volume of the acoustic cavity is at least 3 mm multiplied by d2, where d is a diameter of the membrane.
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公开(公告)号：US10190870B2
公开(公告)日：2019-01-29
申请号：US14899701
申请日：2014-06-20
Applicant: SINTEF TTO AS
Inventor： Matthieu Lacolle , Ib-Rune Johansen , Thor Bakke , Ole-Herman Bjor
Abstract: The present invention relates to an optical displacement sensor comprising a first at least partially reflective surface and a second surface having a diffractive pattern, the surfaces being provided on elements having a variable distance between them, each surface pair defining a cavity between them. The sensor also comprising at least one light source transmitting light at least one a chosen wavelength range into said cavities and at least one light detector receiving light from the cavities, wherein said diffractive patterns are adapted to direct light toward at least one detector provided in a known position relative to said diffractive surfaces.
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公开(公告)号：US10677653B2
公开(公告)日：2020-06-09
申请号：US15757858
申请日：2016-10-05
Applicant: SINTEF TTO AS
Inventor： Jo Gjessing , Jon Olav Grepstad , Hallvard Angelskår , Aasmund Sudbø , Thor Bakke , Zeljko Skokic
Abstract: This invention relates to a source for emitting radiation in the infrared range comprising a thin membrane including a radiation element made from a semi-conductive material having a chosen dopant, the radiation element being connected to a frame, the frame comprising connector means for connecting to a power source for conducting an electrical current through the substrate, the radiation element being provided with a periodic modulation of the refractive index constituting a photonic crystal having a chosen period, thus defining an optical resonator at one or more chosen wavelengths, and wherein the membrane is mounted to the substrate through a number of conductor beams distributed along the membrane circumference so as to provide an even current distribution and thus even heating over the membrane.
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公开(公告)号：US10514249B2
公开(公告)日：2019-12-24
申请号：US16215143
申请日：2018-12-10
Applicant: SINTEF TTO AS
Inventor： Matthieu Lacolle , Ib-Rune Johansen , Thor Bakke , Ole-Herman Bjor
Abstract: The present invention relates to an optical displacement sensor comprising a first at least partially reflective surface and a second surface having a diffractive pattern, the surfaces being provided on elements having a variable distance between them, each surface pair defining a cavity between them. The sensor also comprising at least one light source transmitting light at least one a chosen wavelength range into said cavities and at least one light detector receiving light from the cavities, wherein said diffractive patterns are adapted to direct light toward at least one detector provided in a known position relative to said diffractive surfaces.
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