Abstract:
An optical micro-projection system comprising the following components: at least one laser light source (200, 400, 402, 600); at least one movable mirror (102, 103, 203) for deviating light from said light source to allow generation of images on a projection surface (104, 301, 303, 306, 603); a self mixing module for measurement of the distance (604) between the projection source and a projection surface, said self mixing module comprising: —at least one photodiode (401, 601) for monitoring the light emission power of the laser light source; —an optical power variation counter for counting optical power variations (605); 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.
Abstract:
An optical micro-projection system comprising the following components: at least one laser light source (200, 400, 402, 600); at least one movable mirror (102, 103, 203) for deviating light from said light source to allow generation of images on a projection surface (104, 301, 303, 306, 603); a self mixing module for measurement of the distance (604) between the projection source and a projection surface, said self mixing module comprising:—at least one photodiode (401, 601) for monitoring the light emission power of the laser light source;—an optical power variation counter for counting optical power variations (605); 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.
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:
An optical micro-projection system comprising the following components: at least one laser light source (200, 400, 402, 600); at least one movable mirror (102, 103, 203) for deviating light from said light source to allow generation of images on a projection surface (104, 301, 303, 306, 603); a self mixing module for measurement of the distance (604) between the projection source and a projection surface, said self mixing module comprising:—at least one photodiode (401, 601) for monitoring the light emission power of the laser light source;—an optical power variation counter for counting optical power variations (605); 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.
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:
According to the present invention there is provided a projection device (30,50,100) comprising, a light source (31,61) which can provide light beams (32a,b,c 62a,b,c), wherein the light beams (32a,b,c 62a,b,c) can be used to define one or more pixels of a virtual image (48); a MEMS micro mirror (34) which is arranged to receive the light beams (32a,b,c 62a,b,c) provided by the light source (31,61), and wherein the MEMS micro mirror (34) can oscillate about at least one oscillation axis (7,17) to scan the light beams (32a,b,c 62a,b,c); a reflective element (38), which comprises a plurality of convex reflective projections (39), and wherein the reflective element (38) is arranged so that light beams (32a,b,c 62a,b,c) reflected by the MEMS micro mirror (34) are incident on said convex reflective projections (39), so that the light beams (32a,b,c 62a,b,c) are reflected by the convex reflective projections (39); a beam combiner (45,81), wherein the beam combiner is arranged to receive the light beams (32a,b,c 62a,b,c) which are reflected by the convex reflective projections (39) wherein the beam combiner (45,81) is configured to at least partially reflect the light beams (32a,b,c 62a,b,c) which it receives so that the light beams (32a,b,c 62a,b,c) can form a virtual image (48) which is visible when viewed from within an eyebox (47). There is further provided a corresponding method of projecting a virtual image.
Abstract:
Disclosed herein are devices and techniques related to optical diffusers and particularly, diffusers to reduce moiré patterns in a projected image. The device may comprise an array of micro-focal elements or reflectors and a light polarization grid. The light polarization grid configured to change a polarization between portions of a light beam and the micro-focal elements of reflectors to diffuse the light beam such that portions of the light beam having a difference in polarization may meet at a point.
Abstract:
An optical micro-projection system comprising the following components: at least one laser light source (200, 400, 402, 600); at least one movable mirror (102, 103, 203) for deviating light from said light source to allow generation of images on a projection surface (104, 301, 303, 306, 603); a self mixing module for measurement of the distance (604) between the projection source and a projection surface, said self mixing module comprising:—at least one photodiode (401, 601) for monitoring the light emission power of the laser light source;—an optical power variation counter for counting optical power variations (605); 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.
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.