Sintef Tto As

Pgs Geophysical As

Sintef

Andreas Vogl

Ib-Rune Johansen

Dag Thorstein Wang

Thor Bakke

Matthieu Lacolle

Tobias Gulden Dahl

Sverre Knudsen

Hallvard Angelskår

Zeljko Skokic

Magnus Christian Bjerkeng

Odd Løvhaugen

Frode Tyholdt

Odd Kristen Østern Pettersen

Jakob Vennerød

Sigbjørn Kolberg

Øyvind Nistad Stamnes

Magnus Blihovde Hjelstuen

Jo Gjessing

Odd Kristen Østem Pettersen

Odd Kristen ØStern Pettersen

Frode Tyholt

Zeljko Skocic

Odd LØVHAUGEN

An input device comprises a plurality of optical vibration sensors mounted in a common housing. Each optical vibration sensor comprises a diffractive optical element; a light source arranged to illuminate the diffractive optical element such that a first portion of light passes through the diffractive optical element and a second portion of light is reflected from the diffractive optical element; and a photo detector arranged to detect an interference pattern generated by said first and second portions of light. The optical vibration sensor is configured so that in use, after the first portion of light passes through the diffractive optical element, the first portion of light is reflected from a reflective surface onto the photo detector. The input device is placed in contact with a surface of a solid body, and an object is brought into physical contact with the surface of the solid body, thereby causing vibrations in the solid body. The vibrations are detected using two or more of the optical vibration sensors. The relative phase(s) of the vibrations are used to determine information regarding the point of contact of the object on the surface of the solid body.

Touch-based input device

A field detector () comprises a field-responsive element () which undergoes a dimensional change when exposed to a predetermined field; and an interferometric read-out arrangement arranged to detect the dimensional change of the field-responsive element. A light source () is arranged to provide a measurement beam reflected from the field-responsive element () and a reference beam not reflected from the field-responsive element (), an optical detector () being disposed so as to detect at least part of an interference pattern produced by the measurement beam and the reference beam. The field-responsive element () has a shape comprising a curved surface and is constrained at least one edge () thereof such that the dimensional change causes the curved surface to be displaced in a direction which changes an optical path length of the measurement beam relative to the reference beam, thereby changing the interference pattern detected by said optical detector.

Detection of fields

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 d, where d is a diameter of the membrane.

Optical microphone assembly

The present invention relates to a displacement sensor device and the system including the device, wherein the device comprises a first at least partially transparent plane surface with a first diffraction pattern and a second plane surface comprising a second reflecting diffraction pattern. The diffractive patterns being adapted to diffract light within a chosen range of wavelengths, the second surface being positioned below and parallel to the first surface constituting a pair wherein said first and second diffractive patterns being essentially equal, the device also comprising displacement means for allowing a movement in a direction parallel to said surfaces, the device thus providing a movement sensitive diffraction pattern.

Displacement sensor device and system

The present invention relates to an actuator for moving a rigid element, e.g. an optical element such as mirror, the element being mechanically coupled to a frame with a bendable coupling, wherein actuator elements are mounted on said coupling between the frame and element, the coupling and actuator elements being adapted to provide a movement to the element when subject to signal from a signal generator.

Actuator having two piezoelectric elements on a membrane

The present invention relates to an actuator for moving a rigid element, e.g. an optical element such as mirror (), the element being mechanically coupled to a frame () with a bendable coupling (A), wherein actuator elements (A,B) are mounted on said coupling between the frame and element, the coupling and actuator elements being adapted to provide a movement to the element when subject to signal from a signal generator.

Fabry-perot interferometer with piezoelectric actuator contracting in radial direction on membrane

Growing community of inventors

Oslo, Norway

Andreas Vogl