Intel Corporation

North Corporation

Lemoptix Sa

Google Inc.

Ecole Polytechnique Federale De Lausanne

Faouzi Khechana

Nicolas Abele

Lucio Kilcher

Julien Gamet

Philippe Renaud

Nicolas AbelÉ

A MEMS micro-mirror device includes, a single package; a first mirror and second mirror, wherein at least one of the mirrors is configured to oscillate along an oscillation axis; wherein both mirrors are located within the single package and are arranged such that as the at least one mirror oscillates, the light incident on the first micro-mirror can be deflected to the second mirror.

MEMS micro-mirror device

According to the present invention there is provided a device comprising a MEMS die and, a single magnet, wherein the MEMS die cooperates with the magnet, such that the MEMS die is submerged in a magnetic field provided by the magnet; wherein the magnet is a single multi-pole magnet.

MEMS device

A reflective device comprising, a comprising, a movable element which comprises a reflective surface, wherein the movable element can oscillate about at least one oscillation axis to scan light; one or more holder elements which co-operate with the movable element to hold the movable element in a manner which will allow the movable element to oscillate about the at least one oscillation axis to scan light, wherein the one or more holder elements are configured to define a region which can receive at least a portion of the movable element as the movable element oscillates when the reflective device is mounted on a surface; a magnetic element which is secured to a fixed part of the reflective device; one or more electrically conductive means positioned on the movable element so that one or more electrically conductive means can operatively co-operate with a magnetic field provided by the magnetic element to effect oscillation of the moveable element, wherein the one or more electrically conductive means are completely embedded in the movable element. There is further provided a projection device having such a reflective device and a corresponding method of manufacturing a reflective device.

Reflective device

A micro-projection system for projecting light on a projection surface, comprising: at least one coherent light source (); optical elements () in the optical path between said coherent light source and said projection surface; said optical elements including at least one reflective member () actuated by a drive signal for deviating light from said light source so as to scan a projected image onto said projecting surface; said optical elements including at least one vibrating element () actuated by a vibrating signal so as to reduce speckle onto said projecting surface. The corresponding method for reducing speckle is also provided.

Micro-projection device with anti-speckle vibration mode

An optical micro-projection system comprising the following components: at least one laser light source (); at least one movable mirror () for deviating light from said light source to allow generation of images on a projection surface (); a self mixing module for measurement of the distance () between the projection source and a projection surface, said self mixing module comprising: &#x2014;at least one photodiode () for monitoring the light emission power of the laser light source; &#x2014;an optical power variation counter for counting optical power variations (); successive displacements of said mirror allowing the self mixing module providing successive projection distance measurements of a plurality of points of said projection surface. A projection method for optical micro-projection system and a distance measurement method are also provided.

Optical micro-projection system and projection method

A MEMS micro-mirror device comprising, a MEMS micro-mirror, a support structure and, a first and second torsional arm which each connect the MEMS micro-mirror to the support structure, wherein the first and second torsional arms are arranged to define a first oscillation axis about which the MEMS micro-mirror can oscillate; a single actuation coil for oscillating the MEMS micro mirror about the first oscillation axis, at least a portion of the single actuation coil being arranged to cooperate with the MEMS micro mirror; a magnet which is arranged such that a magnetic field generated by the magnet submerges at least the portion of the single actuation coil which cooperates with the MEMS micro mirror; wherein the single actuation coil is configured to extend along the first and second torsional arms.

A reflective device including a movable element which has a reflective surface, wherein the movable element can oscillate about at least one oscillation axis to scan light; one or more holder elements which co-operate with the movable element to hold the movable element in a manner which will allow the movable element to oscillate about the at least one oscillation axis to scan light, wherein the one or more holder elements are configured to define a region which can receive at least a portion of the movable element as the movable element oscillates when the reflective device is mounted on a surface; a magnetic element which is secured to a fixed part of the reflective device; one or more electrically conductive means positioned on the movable element so that one or more electrically conductive means can operatively co-operate with a magnetic field provided by the magnetic element to effect oscillation of the moveable element, wherein the one or more electrically conductive means are completely embedded in the movable element. There is further provided a projection device having such a reflective device and a corresponding method of manufacturing a reflective device.

Reflective device to scan light to project an image on a display surface

Optical MEMS scanning micro-mirror comprising: &#x2014;a movable scanning micro-mirror (), being pivotally connected to a MEMS body () substantially surrounding the lateral sides of the micro-mirror, &#x2014;a transparent window () substantially covering the reflection side of the micro-mirror; &#x2014;wherein a piezo-actuator assembly () and a layer of deformable transparent material () are provided on the outer portion of said window (); &#x2014;the piezo-actuator assembly () being arranged at the periphery of the layer of transparent material (); &#x2014;said piezo-actuator assembly () and transparent material () cooperating so that when actuated, the piezo-actuator assembly () causes micro-deformation of the transparent material (), thereby providing an anti-speckle effect. The invention also provides the corresponding micro-projection system and method for reducing speckle.

Optical MEMS scanning micro-mirror with anti-speckle cover

According to the present invention there is provided a MEMS device comprising, a mirror which is connected to a fixed portion by means of a first and second torsional arm, each of the first and second torsional arms are configured such that they can twist about torsional axes so as to oscillate the mirror about a first oscillation axes, and wherein the first and second torsional arms are each configured to have two or more meanders and wherein the first and second torsional arms are arranged symmetrically relative to the first oscillation axis.

According to the present invention there is provided an actuator comprising, a movable member, the movable member comprising a support frame which is configured such that it can oscillate about a first oscillation axis and a mirror which is fixed to the support frame such that oscillation of the support frame will effect oscillation of the mirror; an coil, which cooperates with the support frame; one or more boundary portions provided between the support frame and the mirror which reduce the influence of warp transmitted from an edge of the support frame to the mirror, as the support frame oscillates about the first oscillation axis; wherein the support frame further comprises one or more cut-out regions, wherein the one or more cut-out regions are configured to be parallel to at least a portion of the coil, to reduce stress on the coil as the support frame oscillates about the first oscillation axis and/or to reduce the temperature dependence of the properties of the actuator.

Electromagnetic actuator for optical device to reduce temperature and deformation

A MEMS micro-mirror assembly () comprising, a MEMS device () which comprises a MEMS die () and a magnet (); a flexible PCB board () to which the MEMS device () is mechanically, and electrically, connected; wherein the flexible PCB board () further comprises a first extension portion () which comprises a least one electrical contact () which is useable to electrically connect the MEMS micro-mirro rassembly () to another electrical component). There is further provided a projection system comprising such a MEMS micro-mirror assembly ().

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Preverenges, Switzerland

Faouzi Khechana