The invention relates to a laser beam device for generating an effective laser beam and an illuminating laser beam, having a coupling element for coupling the illuminating laser beam into a beam path of the effective laser beam. The laser beam device is characterized in that the coupling element has a first sub-region and a second sub-region that is different from the first sub-region, and the effective laser beam, the illuminating laser beam and the coupling element are arranged relative to one another such that the effective laser beam is directed onto the first sub-region and the illuminating laser beam is directed onto the second sub-region, the first sub-region being transparent to the effective laser beam and the second sub-region being designed to reflect the illuminating laser beam in parallel with the effective laser beam.

A system and method including, receiving a plurality of optical beams in a first direction along a first plane in a first beam pattern towards an optical element based on a trajectory that causes at least a portion of the plurality of optical beams to not contact a surface of the optical lens. The system and method includes transmitting a first set of the plurality of optical beams in the first direction along a second plane. The system and method includes transmitting a second set of the plurality of optical beams in the first direction along the first plane. The system and method includes generating a second beam pattern by transmitting the first set and the second set of the plurality of optical beams through an optical element, wherein the second beam pattern adjusts the trajectory to cause the portion to contact the surface of the optical lens.

Laser backlight source for a narrow-frame edge-lit type liquid crystal display. The laser backlight includes visible laser groups, beam shaping devices, reflectors and a liquid crystal display light guide plate. After being reflected by reflectors to change a laser propagation direction by 180 degrees, laser beams emitted by visible lasers are incident on the liquid crystal display light guide plate through a light-permeable surface. When being incident on the lateral light-permeable surface of the liquid crystal display light guide plate via the reflectors, the visible laser beams emitted by adjacent visible laser groups generate light overlap larger than 10% of the area of each light spot. A sum of lengths of laser spots of the visible laser groups at a same waveband on the lateral light-permeable surface of the liquid crystal display light guide plate is greater than or equal to 0.65 times of the length of the light-permeable surface.

A method of additive manufacture is disclosed. The method may include creating, by a 3D printer contained within an enclosure, a part having a weight greater than or equal to 2,000 kilograms. A gas management system may maintain gaseous oxygen within the enclosure atmospheric level. In some embodiments, a wheeled vehicle may transport the part from inside the enclosure, through an airlock, as the airlock operates to buffer between a gaseous environment within the enclosure and a gaseous environment outside the enclosure, and to a location exterior to both the enclosure and the airlock.

In various embodiments, wavelength beam combining laser systems incorporate optical cross-coupling mitigation systems and/or engineered partially reflective output couplers in order to reduce or substantially eliminate unwanted back-reflection of stray light.

A LIDAR device for sampling a sampling range. The LIDAR device includes an emitting unit including at least one beam source for generating electromagnetic beams, and includes a receiving unit including at least one detector for receiving beams backscattered and/or reflected from the sampling range, the emitting unit and/or the receiving unit being immovable, rotatable or pivotable. The emitting unit includes a curved lens array for splitting the beams generated by the beam source into subbeams and for emitting the subbeams into the sampling range. A method for operating a LIDAR device including at least one curved lens array is also described.

The disclosure provides an optical system, an optical sensing unit and an optical sensing module. The optical system is used for forming a plurality of light spots on a plurality of photosensitive regions separated from each other. The optical system includes: a lens for receiving a first light beam and converging the first light beam; a first light-transmitting layer located under the lens, for refracting the converged first light beam into a plurality of second light beams, the plurality of second light beams being used for forming the plurality of light spots on the photosensitive regions, wherein each light spot in the plurality of light spots covers a part of the plurality of photosensitive regions; and a second light-transmitting layer located under the first light-transmitting layer, wherein the plurality of second light beams are respectively incident on the plurality of photosensitive regions through the second light-transmitting layer.

A method and an apparatus for collecting powder samples in real-time in powder bed fusion additive manufacturing may involves an ingester system for in-process collection and characterizations of powder samples. The collection may be performed periodically and uses the results of characterizations for adjustments in the powder bed fusion process. The ingester system of the present disclosure is capable of packaging powder samples collected in real-time into storage containers serving a multitude purposes of audit, process adjustments or actions.

A light-source device, an image projection apparatus, and a display device. The light-source device includes a light source to emit light, an optical element having a lens array on one side or both sides of which a plurality of lenses are arrayed with distance from each other, the distance between a pair of vertices of an adjacent pair of the plurality of lenses of the optical element being equal to or less than one-quarter of width of light flux of the light incident on the optical element and a wavelength conversion element to convert a wavelength of the light emitted from the light source and passed through the optical element. An image projection apparatus includes the light-source device, a light mixing element to mix the light emitted from the light-source device to uniformize the light and an illumination optical system to emit the light uniformized by the light mixing element.

An optoelectronic device includes a semiconductor substrate having first and second faces. A first array of emitters are formed on the first face of the semiconductor substrate and are configured to emit respective beams of radiation through the substrate. Electrical connections are coupled to actuate selectively first and second sets of the emitters in the first array. A second array of microlenses are formed on the second face of the semiconductor substrate in respective alignment with the emitters in at least one of the first and second sets and are configured to focus the beams emitted from the emitters in the at least one of the first and second sets so that the beams are transmitted from the second face with different, respective first and second focal properties.