Abstract:
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.
Abstract:
A micro-projection system for projecting light on a projection surface, comprising: at least one coherent light source (101); optical elements (102, 108, 109) in the optical path between said coherent light source and said projection surface; said optical elements including at least one reflective member (102) 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 (102) actuated by a vibrating signal so as to reduce speckle onto said projecting surface. The corresponding method for reducing speckle is also provided.
Abstract:
Optical MEMS scanning micro-mirror comprising:—a movable scanning micro-mirror (101), being pivotally connected to a MEMS body (102) substantially surrounding the lateral sides of the micro-mirror,—a transparent window (202) substantially covering the reflection side of the micro-mirror;—wherein a piezo-actuator assembly (500) and a layer of deformable transparent material (501) are provided on the outer portion of said window (202);—the piezo-actuator assembly (500) being arranged at the periphery of the layer of transparent material (501);—said piezo-actuator assembly (500) and transparent material (501) cooperating so that when actuated, the piezo-actuator assembly (500) causes micro-deformation of the transparent material (501), thereby providing an anti-speckle effect. The invention also provides the corresponding micro-projection system and method for reducing speckle.
Abstract:
A head worn display (HWD) includes a projection system, which projection system in turn may include: a projection surface including a holographic optical element (HOE) centered at a first location; a projector to project light onto a projection area of the projection surface; and a controller to send a control signal to the projector to cause the projector to project an image onto a location shifted from the first location based on a misalignment of a user's line of sight with the first location.
Abstract:
The present disclosure provides a projection device and manufacturing method, comprising the steps of fixing the positions of a red light source, green light source and blue light source so that the light sources are immovable; providing a mirror which is configured to oscillate such that it can scan light it receives across a display screen; positioning an optical component, which is configured to deflect light, such that it can receive red, green and blue light beams outputted from the red, green and blue light sources respectively; adjusting the optical component such that the optical component compensates for variation between the light sources, in the direction in which the red, green and blue light beams are output from the red, green and blue light sources, so that each of the red, green and blue light beams are directed to the same point on the display screen.
Abstract:
Method for mounting a semiconductor laser element (3) into a laser holder (1), comprising the following steps:providing a laser holder (1) comprising a metal body (2) equipped with a substantially cylindrical housing (20) and comprising a frontal end (21) equipped with a first aperture (210) for passage of the laser beam produced by said laser element, and a back end (22) equipped with a second aperture (220) for inserting said laser element (3), said body (2) being passed through by a first group of windows (51, 52) arranged radially in a first plane (P1) perpendicular to the axis (23) of said housing (20), the angular spacing between said windows (51, 52) being regular;inserting said semiconductor laser element (3) into said housing (20);inserting an adhesive (24) for fastening said semiconductor laser element (3) into said windows (51, 52); andsimultaneously setting the adhesive in said windows (51, 52) by means of ultraviolet light penetrating simultaneously into said windows (51, 52).
Abstract:
Disclosed herein are devices and methods to provide a display including a projection system and a lens including a holographic optical element to receive light and reflect the light to an exit pupil. The projection system is adapted to move the image projected onto the lens based on a location of the HOE within the lens.
Abstract:
The invention relates to an electromagnetically actuated microshutter comprising: a moveable plate that can rotate about an axis, connected to a stationary frame by two arms aligned on both sides of the plate to said axis, and comprising on its periphery a conductive loop and below the assembly formed by the stationary frame and the moveable plate, a group of magnets having distinct magnetic orientations, arranged in such a manner so as to create, with respect to the moveable plate, a lateral magnetic field, in the plane of the frame, oblique in relation to the axis of rotation.
Abstract:
A MEMS micro-mirror assembly (250, 300, 270, 400) comprising, a MEMS device (240) which comprises a MEMS die (241) and a magnet (231); a flexible PCB board (205) to which the MEMS device (240) is mechanically, and electrically, connected; wherein the flexible PCB board (205) further comprises a first extension portion (205b) which comprises a least one electrical contact (259a,b) which is useable to electrically connect the MEMS micro-mirror assembly (250, 300, 270, 400) to another electrical component). There is further provided a projection system comprising such a MEMS micro-mirror assembly (250, 300, 270, 400).
Abstract:
According to the present invention there is provided a method of operating a laser comprising the steps of; defining an intensity value (KVIDEO red, KVIDEO green, KVIDEO blue) for a light beam which is to be output from the laser; determining if the defined intensity value is greater than, or less than, a threshold intensity (KTH red, KTH green, KTH blue) for the laser, wherein the threshold intensity is the intensity of the light which is output from the laser when the input current to the laser is equal to the threshold current (ITH red, ITH green, ITH blue) of the laser, wherein the threshold current (ITH red, ITH green, ITH blue) of the laser is an input current value below which the laser would operate in its light emitting region and equal to, or above which, the laser will operate in its laser region; operating the laser using current from at least a DAC current source if the defined intensity value (KVIDEO red, KVIDEO green, KVIDEO blue) is greater than the threshold intensity (KTH red, KTH green, KTH blue), wherein the DAC current source operates the laser by inputting to the laser a continuous current which has an amplitude which is greater than the threshold current (ITH red, ITH green, ITH blue) of the laser, and which has an amplitude such that the laser is operated to output a light beam which has an intensity equal to the defined intensity value (KVIDEO red, KVIDEO green, KVIDEO blue); and operating the laser using current from the PWM current source only, if the defined intensity value (KVIDEO red, KVIDEO green, KVIDEO blue) is less than the threshold intensity (KTH red, KTH green, KTH blue), wherein the PWM current source operates the laser by inputting to the laser a current which has an amplitude which is at least equal to the threshold current value (ITH red, ITH green, ITH blue) of the laser, and wherein the duration of time over which the PWM current source inputs its current to the laser is such that the laser is operated to output a light beam which has an intensity equal to the defined intensity value (KVIDEO red, KVIDEO green, KVIDEO blue). There is further provided a corresponding laser driver.