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: Assembly (1) comprising a laser source (3) and a component for reducing speckle (7) comprising a beam splitter (9) that reflects a first portion (11) of the laser beam and transmits a second portion (13) and a first and second reflecting means (15, 17), the first reflective means (15) receiving the second portion (13) of the laser beam and the second reflective means (17) directing said second portion (13) back to the beam splitter (9), wherein the second portion (13) of the laser beam can be directed from the first (15) to the the second reflective means (17), wherein the first (15), the second (17) reflective means and the means for beam splitting (9) define an optical path for the second portion (13) of the laser beam, the length of which being equal to, or greater than, the coherence length of the laser beam.

Abstract: An optical assembly, and in particular an optical assembly which uses a microlens array or a micromirror array to reduce speckle. It further concerns an optical component which comprises a micromirror array.

Abstract: According to the present invention there is provided a method of reducing speckle in a primary light spot which is projected onto a surface by a projection device which comprises a laser, wherein a primary light spot is defined by two or more secondary light spots, the method comprising the steps of (a) consecutively providing the laser with “n” different input currents so that the laser consecutively outputs “n” different light beams, wherein each one of the “n” different light beams defines a secondary light spot on the surface, wherein “n” is an integer value greater than one; and (b) superposing the secondary light spots. There is further provided a corresponding method of projecting a pixel.

Abstract: Apparatuses, methods and storage medium associated with retinal see through display are disclosed herein. In embodiments, an apparatus may comprise a retinal see through display wearable by a user; a target luminance calculator to determine a required luminance level; and a display power controller to determine a power level for the retinal see through display, based at least in part on a pupil size of the user and the determined required luminance level. Other embodiments may be described and/or claimed.

Abstract: According to the present invention there is provided a light assembly, comprising, at least one laser source which is operable to emit a laser beam, and a component for reducing speckle, wherein the component for reducing speckle comprises a block, comprising at least first, second and third surface, and a means for beam splitting, and wherein the first and second reflective means and means for beam splitting are arranged to define an optical path for the second portion of the laser beam whose length is equal to, or greater than, a coherence length of the laser beam which is emitted from the at least one laser source.

Abstract: Assembly (1) comprising a laser source (3) and a component for reducing speckle (7) comprising a beam splitter (9) that reflects a first portion (11) of the laser beam and transmits a second portion (13) and a first and second reflecting means (15, 17), the first reflective means (15) receiving the second portion (13) of the laser beam and the second reflective means (17) directing said second portion (13) back to the beam splitter (9), wherein the second portion (13) of the laser beam can be directed from the first (15) to the the second reflective means (17), wherein the first (15), the second (17) reflective means and the means for beam splitting (9) define an optical path for the second portion (13) of the laser beam, the length of which being equal to, or greater than, the coherence length of the laser beam.

Abstract: According to the present invention there is provided a method of reducing speckle in a primary light spot which is projected onto a surface by a projection device which comprises a laser, wherein a primary light spot is defined by two or more secondary light spots, the method comprising the steps of (a) consecutively providing the laser with “n” different input currents so that the laser consecutively outputs “n” different light beams, wherein each one of the “n” different light beams defines a secondary light spot on the surface, wherein “n” is an integer value greater than one; and (b) superposing the secondary light spots. There is further provided a corresponding method of projecting a pixel.

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: According to the present invention there is provided a method of reducing speckle in a primary light spot which is projected onto a surface by a projection device which comprises a laser, wherein a primary light spot is defined by two or more secondary light spots, the method comprising the steps of (a) consecutively providing the laser with “n” different input currents so that the laser consecutively outputs “n” different light beams, wherein each one of the “n” different light beams defines a secondary light spot on the surface, wherein “n” is an integer value greater than one; and (b) superposing the secondary light spots. There is further provided a corresponding method of projecting a pixel.

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: Apparatuses, methods and storage medium associated with retinal see through display are disclosed herein. In embodiments, an apparatus may comprise a retinal see through display wearable by a user; a target luminance calculator to determine a required luminance level; and a display power controller to determine a power level for the retinal see through display, based at least in part on a pupil size of the user and the determined required luminance level. Other embodiments may be described and/or claimed.

Abstract: According to the present invention there is provided a method of reducing speckle in a primary light spot which is projected onto a surface by a projection device which comprises a laser, wherein a primary light spot is defined by two or more secondary light spots, the method comprising the steps of (a) consecutively providing the laser with “n” different input currents so that the laser consecutively outputs “n” different light beams, wherein each one of the “n” different light beams defines a secondary light spot on the surface, wherein “n” is an integer value greater than one; and (b) superposing the secondary light spots. There is further provided a corresponding method of projecting a pixel.

Abstract: Disclosed herein are devices and techniques related to optical diffusers and particularly, diffusers to reduce moire 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 assembly, and in particular an optical assembly which uses a microlens array or a micromirror array to reduce speckle. It further concerns an optical component which comprises a micromirror array.

Abstract: According to the present invention there is provided a light assembly, comprising, at least one laser source which is operable to emit a laser beam, and a component for reducing speckle, wherein the component for reducing speckle comprises a block, comprising at least first, second and third surface, and a means for beam splitting, and wherein the first and second reflective means and means for beam splitting are arranged to define an optical path for the second portion of the laser beam whose length is equal to, or greater than, a coherence length of the laser beam which is emitted from the at least one laser source.