An optical module includes a light-forming unit to form light. The light-forming unit includes a base member having an electronic temperature control module, a base plate, a plurality of submounts, and a microelectromechanical system (MEMS) base. The light-forming unit also includes a plurality of laser diodes arranged on the submounts, a filter arranged on the base plate and located to receive the light emitted from the plurality of laser diodes and multiplex the emitted light, a MEMS arranged on the MEMS base and located to receive the light multiplexed by the filter. The MEMS includes a scanning mirror to scan the light multiplexed by the filter, and the electronic temperature control module regulates a temperature range of the MEMS. The light-forming unit also includes a protective member surrounding and sealing the light-forming unit, which includes a base body and a lid welded to the base body.

A semiconductor laser device comprises an active layer having a main extension plane, a first cladding layer and a second cladding layer where the active layer is arranged between the first and second cladding layer in a direction perpendicular to the main extension plane, at least one first emission region and at least one second emission region arranged next to each other in a direction parallel to the main extension plane, a light-outcoupling surface parallel to the main extension direction and arranged on a side of the second cladding layer opposite to the active layer, and a photonic crystal layer arranged in the first cladding layer or in second cladding layer. The photonic crystal layer may include a first photonic crystal structure in the first emission region and a second photonic crystal structure in the second emission region where the first and the second photonic crystal structures are different.

A digital PSF for use in a dual modulation display. The invention allows the use of less than optimal point spread (PSF) functions in the optics between the pre-modulator and primary modulator of a dual modulation projection system. This technique uses multiple halftones per frame in the pre-modulator synchronized with a modified bit sequence in the primary modulator to produce a compensation image that reduces the errors produced by the sub-optimal PSF. The invention includes the application to dual modulation and dual modulated 3D viewing systems.

A projector assembly includes a light emitting diode (LED) array, wherein the LED array has an array axis, wherein the LED array includes a plurality of LEDs arranged along the array axis, and wherein the plurality of LEDs are individually addressable. The projector assembly includes a rotatable actuator supporting the LED array, wherein the rotatable actuator has a rotation axis, and wherein the rotation axis and the array axis are parallel. The projector assembly includes a collimator positioned in optical communication with the LED array for collimating light emitted from the plurality of LEDs and a set of imaging optics positioned in optical communication with the collimator for focusing collimated light and forming a first image of the LED array at a distance, wherein the first image includes a first axis corresponding to the array axis and a second axis orthogonal to the rotation axis.

A display system includes an optical element through which light diverges and an imaging optical system configured to form an image by projecting diverging light diverging through the optical element. In the display system, the image formed by the imaging optical system is visually recognized by a viewer, and a condition in an equation tan 0≥(T×B)/(S×O) is satisfied, where θ denotes a divergence angle of the optical element, T denotes distance between the image forming optical system and the formed image, B denotes a range of an eye box that is an area through which the formed image can visually be recognized, S denotes distance between the formed image and a viewpoint of the viewer of the formed image, and O denotes distance between the optical element and the image forming optical system. In the above equation, each distance indicates length of an optical path that passes through a center of an image formed by the light when an object is observed from a reference eyepoint.

The light source unit includes a base provided with an opening, a support member fixed to the base at the opening, and a light source assembly fixed to the support member at the opening. The light source assembly includes a light source emitting laser light, a lens disposed on an optical axis of the laser light, and a holding member holding the light source and the lens. The support member has a convex receiving surface extending along the spherical surface so as to surround the optical axis when viewed from a direction parallel to the optical axis. The light source assembly is fixed to the support member by coupling the holding member to the receiving surface at a contact portion with the receiving surface. The receiving surface has a portion located on a side away from the optical axis with respect to a coupling part with the holding member.

An image projector includes a spatial light modulator (SLM) with a two dimensional array of pixel elements controllable to modulate a property of light transmitted or reflected by the pixel elements. An illumination arrangement delivers illumination to the SLM. A collimating arrangement collimates illumination from the SLM to generate a collimated image directed to an exit stop. The illumination arrangement is configured to sequentially illuminate regions of the SLM, each corresponding to a multiple pixel elements. A controller synchronously controls the pixel elements and the illumination arrangement so as to project a collimated image with pixel intensities corresponding to a digital image.

The purpose of the present technology is to provide a video projection device capable of obtaining a satisfactory video (image) while achieving reduction in power consumption and reduction in size of the device. Provided is a video projection device including at least: a monolithic semiconductor laser array including multiple light emitting units, each of which emits a laser light beam; an optical waveguide that guides the laser light beam in a predetermined direction; a mirror that scans the laser light beam in two axes; and a diffractive element that diffracts the laser light beam in a specific direction in front of an eye and projects the laser light beam on a retina. The multiple light emitting units are respectively optically coupled to different input ports among multiple input ports included in the optical waveguide.

A light projector and method of aligning the light projector is provided. A light projector steers an outgoing beam of light onto an object, passing light returned from the object through a focusing lens onto an optical detector. The light projector may generate a light pattern or template by rapidly moving the outgoing beam of light along a path on a surface. To place the light pattern/template in a desired location, the light projector may be aligned with an electronic model.

A scanning laser projection system includes a virtual protective housing circuit to automatically reduce accessible emissions of visible laser light by decimating areas of a projected image to reduce optical power exposure levels for safety, comfort, aesthetic, or system classification purposes. IR laser light pulses are scanned in a field of view, and a percentage of visible laser light pulses are blanked based on attributes of reflections of the IR laser light pulses.