Patents by Inventor Kirsi Tappura
Kirsi Tappura 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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Publication number: 20220344561Abstract: According to an example aspect of the present invention, there is provided a detector comprising an optically absorbing membrane suspended over a cavity between the membrane and a substrate, the substrate comprised in the detector, and a thermoelectric transducer attaching the optically absorbing membrane over the cavity, wherein the optically absorbing membrane forms a contacting element between n-type and p-type thermoelectric elements of the thermoelectric transducer.Type: ApplicationFiled: September 11, 2020Publication date: October 27, 2022Inventors: Aapo Varpula, Jonna Tiira, Kirsi Tappura, Grigoras Kestutis, Mika Prunnila
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Patent number: 11402272Abstract: An absorber structure for a thermal detector, the absorber structure including edges defining a basic form, a plurality of first legs of electrically conducting material joined in an electrically conductive manner to form, between the edges of the absorber structure, a grid having openings, the first legs forming at least one continuous connection between the edges of the absorber structure; and a plurality of second legs of electrically conducting material joined in an electrically conductive manner to the first legs, wherein the second legs protrude from the first legs into the openings of the grid and terminate at points of termination located at a distance from adjacent first legs.Type: GrantFiled: October 30, 2019Date of Patent: August 2, 2022Assignee: Teknologian tutkimuskeskus VTT OyInventors: Kirsi Tappura, Aapo Varpula, Mika Prunnila
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Publication number: 20220155150Abstract: According to an aspect, there is provided a structure comprising an absorbing layer for absorbing incident infrared radiation received via a receiving surface of the absorbing layer and a plurality of mushroom-shaped plasmonic elements for enhancing absorption of the incident infrared radiation into the absorbing layer. Said plurality of mushroom-shaped plasmonic elements have sub-wavelength dimensions and sub-wavelength spacings and are arranged along the receiving surface. Each of said plurality of mushroom-shaped plasmonic elements project out relative to the receiving surface.Type: ApplicationFiled: March 23, 2020Publication date: May 19, 2022Inventors: Kirsi TAPPURA, Tomi HAATAINEN, Tapio MÄKELÄ
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Publication number: 20210404880Abstract: An absorber structure for a thermal detector, the absorber structure including edges defining a basic form, a plurality of first legs of electrically conducting material joined in an electrically conductive manner to form, between the edges of the absorber structure, a grid having openings, the first legs forming at least one continuous connection between the edges of the absorber structure; and a plurality of second legs of electrically conducting material joined in an electrically conductive manner to the first legs, wherein the second legs protrude from the first legs into the openings of the grid and terminate at points of termination located at a distance from adjacent first legs.Type: ApplicationFiled: October 30, 2019Publication date: December 30, 2021Applicant: Teknologian tutkimuskeskus VTT OyInventors: Kirsi TAPPURA, Aapo VARPULA, Mika PRUNNILA
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Patent number: 10018563Abstract: A sample plate (1) and an analyzing method, wherein the sample plate (1) comprises a substrate (2), at least one sensor site (5) on a first surface (3) of the substrate (2) and at least one optical element (6) on a second surface (4) of the substrate (2). The sample plate (1) is further provided with a waveguide (7) on the second surface (4) for guiding an excitation signal to interact with the at least one sensor site (5). The method comprises bringing the sample in contact with at least one sensor site (5), exciting the sensor site (5) in order to obtain an emitted signal, and selectively collecting the emitted signal by means of at least one optical element (6) and utilizing a supercritical angle fluorescence method; and detecting the collected emitted signals by a detector. In the method, the sensor site (5) is excited by means of an evanescent field generated by the excitation signal propagating in a waveguide (7).Type: GrantFiled: February 27, 2014Date of Patent: July 10, 2018Assignee: Teknologian tutkimuskeskus VTT OyInventors: Kirsi Tappura, Hannu Välimäki
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Publication number: 20160011112Abstract: A sample plate (1) and an analysing method, wherein the sample plate (1) comprises a substrate (2), at least one sensor site (5) on a first surface (3) of the substrate (2) and at least one optical element (6) on a second surface (4) of the substrate (2). The sample plate (1) is further provided with a waveguide (7) on the second surface (4) for guiding an excitation signal to interact with the at least one sensor site (5). The method comprises bringing the sample in contact with at least one sensor site (5), exciting the sensor site (5) in order to obtain an emitted signal, and selectively collecting the emitted signal by means of at least one optical element (6) and utilizing a supercritical angle fluorescence method; and detecting the collected emitted signals by a detector. In the method, the sensor site (5) is excited by means of an evanescent field generated by the excitation signal propagating in a waveguide (7).Type: ApplicationFiled: February 27, 2014Publication date: January 14, 2016Inventors: Kirsi Tappura, Hannu Välimäki
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Patent number: 8136403Abstract: The present invention relates to a micromechanical sensor for analyzing liquid samples and an array of such sensors. The invention also concerns a method for sensing liquid samples and the use of longitudinal bulk acoustic waves for analyzing liquid phase samples micromechanically. The sensor comprises a body and a planar wave guide portion spaced from the body. At least one electro-mechanical transducer element are used for excitation of longitudinal bulk acoustic waves to the wave guide portion in response to electrical actuation and for converting acoustic waves into electrical signals. The wave guide portion is provided with a sample-receiving zone onto which the sample can be introduced. By means of the invention, the sensitivity of micromechanical liquid sensors can be improved.Type: GrantFiled: July 4, 2006Date of Patent: March 20, 2012Assignee: Valtion Teknillinen TutkimuskeskusInventors: Heikki Seppa, Kirsi Tappura, Jussi Tuppurainen, Tomi Mattila, Ari Alastalo, Hannu Helle, Aarne Oja
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Publication number: 20090277271Abstract: The present invention relates to a micromechanical sensor for analyzing liquid samples and an array of such sensors. The invention also concerns a method for sensing liquid samples and the use of longitudinal bulk acoustic waves for analyzing liquid phase samples micromechanically. The sensor comprises a body and a planar wave guide portion spaced from the body. At least one electro-mechanical transducer element are used for excitation of longitudinal bulk acoustic waves to the wave guide portion in response to electrical actuation and for converting acoustic waves into electrical signals. The wave guide portion is provided with a sample-receiving zone onto which the sample can be introduced. By means of the invention, the sensitivity of micromechanical liquid sensors can be improved.Type: ApplicationFiled: July 4, 2006Publication date: November 12, 2009Applicant: VALTION TEKNILLINEN TUTKIMUSKESKUSInventors: Heikki Seppa, Kirsi Tappura, Jussi Tuppurainen, Tomi Mattila, Ari Alastalo, Hannu Helle, Aarne Oja
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Patent number: 6424843Abstract: The telecommunication device comprises a speaker (32) and a microphone (33) in order to use the telecommunication device as a telephone. Further it comprises a camera (91, 1101) having a certain photographing direction, and a display (38, 1102) having a certain displaying direction, in order to use the telecommunication device as an image generating means. The photographing direction is substantially different from the displaying direction.Type: GrantFiled: April 5, 2000Date of Patent: July 23, 2002Assignee: Nokia OyjInventors: Ilpo Reitmaa, Hannu Nieminen, Jyrki Kimmel, Kirsi Tappura, Mika V{overscore (a)}is{overscore (a)}nen, Timo Kolehmainen