The present invention discloses an optical path/beam splitting unit and a coaxial-wire-feed cladding head thereof. The optical path/beam splitting unit includes an adjustable mirror and at least one stage of beam splitter. Several adjustable mirrors are distributed around the beam splitter. The beam splitter splits an incident laser beam into a plurality of split beams perpendicular to the incident laser beam. The split beams all are focused to a point through the adjustable mirrors. The coaxial-wire-feed cladding head includes a cladding head mirror cavity provided therein with the optical path/beam splitting unit and a wire feeding tube. The wire feeding tube is coaxially arranged with the collimated laser beam. The wire feeding tube extends out of the cladding head mirror cavity. A wire passes through the wire feeding tube and the wire feeding nozzle in order. The adjustable mirrors adjust the focusing of the split beams onto the wire.

An optical device is mounted to an electronic circuit having a main face with at least one light source. The optical device is made from a block which includes, for each light source, a corresponding opening that passes through the block. The opening includes a cylindrical part with a threading on an inside surface.

A tubular LED light fixture includes a lamp holder; printed circuit board; a plurality of point light sources; lens; strip-shaped convex lens array, located between the lens and printed circuit board and arranged along the length direction of the tubular LED light fixture for converting each point light source into a plurality of consecutive sub point light sources, and the sub point light source converted by the adjacent point light source is connected or overlapped. The invention adopts a strip-shaped convex lens array which forms a line light source only by diffusing light from the point light source only in the length direction of the strip light fixture, preventing light from diffusing in multiple directions, so that the line source is purified. The lens is arranged to perform light distribution in the other direction to the line source, thereby reducing energy attenuation and ensuring the light effect.

An apparatus includes a horn having a horn body including at least one horn sidewall defining a first opening that tapers down to a second opening in a direction of elongation and a port that is tubular and dimensionally uniform transverse to the direction of elongation and extends in the direction of elongation from a first port end that is in communication with the second opening to a second port end that defines an external opening. A dielectric rod includes a rod length extending between a first rod end and a second rod end with the first rod end extending through the external opening of the second port end and into the port cavity such that the first rod end is in a spaced apart relationship from the port sidewall along the light path.

The present invention relates to a method for printing a three-dimensional light guiding structure (1) by curing droplets (7) of a printing material by light irradiation, wherein in a first step the droplets (7) of printing material are deposited by a nozzle (30) or a print head of an inkjet printer such that the droplets (7) of printing material form a layer (10) and in a second step light is directed from a light source to an array (5), wherein the array (5) comprises a plurality of mirror elements (6), wherein at least one mirror element (6) of the array (5) can be orientated such that the at least one mirror element (6) of the array (5) reflects in directly or directly light either onto a screen (3) or onto the layer (10) formed by the droplets (7) of printing material.

The invention relates to an optical device and to a headlighting assembly including an optical device. An optical device includes a body of a transparent material arranged to receive light at at least one light input portion. At least a portion of the light is reflected at an outer surface of the body due to total internal reflection. A non-transparent housing is provided to at least partially cover the body. The body is held within the housing by protrusions arranged to abut against the outer surface.

The invention provides a collimator device for a lighting application which comprises a collimator panel having a first end face which receives input light and a second end face which provides collimated light. The second end face is opposite to the first end face. The collimator panel comprises a plurality of walls which extend between the first end face and the second end face to obtain a grid of cells. The cells extend between the first end face and the second end face to obtain the collimated light. At least the plurality of the walls are arranged to obtain cross-sections of the associated cells which form an auxetic structure. The collimator panel is deformable from a first structure into a second structure by changing the cross-section of the associated cells to change the collimated light from a first spatial distribution into collimated light having a second spatial distribution. The first spatial distribution is different from the second spatial distribution.

The invention is related to a back-light device. The back-light device comprises a reflection structure and a back-light plate. A plurality of light-emitting elements, disposed on the back-light plate, face a light-entering side of the reflection structure, and the emitted light of the light-emitting elements enters the light-entering side of the reflection structure and is reflected to a light-emitting side of the reflection structure by the reflection of the reflection structure for forming a back-light source emitted to a display panel.

A lens that spreads light from a point light source includes a light entry side having a first Fresnel structure, a light exit side having a second Fresnel structure different from the first Fresnel structure, a section plane located entirely between the first and second Fresnel structures so that the lens is flat, and a central axis as an optical axis perpendicular to the section plane, wherein a height of Fresnel rings of the first Fresnel structure, referred to the section plane, increases in the direction away from the central axis, the Fresnel rings of the first Fresnel structure each have an entry surface facing towards the central axis and a deflecting surface facing away from the central axis, and Fresnel rings of the second Fresnel structure each have a mirror surface facing towards the central axis and an exit surface facing away from the central axis.

A side concentrating solar apparatus, comprising a light receiving device (110) and two reflector panels, wherein a first reflector panel (120) is disposed at a side of the light receiving device, a second reflector panel (130) is disposed at an upper edge of the first reflector panel, and an included angle () of a light reflecting surface of the second reflector panel and a light reflecting surface of the first reflector panel is an obtuse angle, such that light rays that reach each reflector panel are at least partially guided to the light receiving device. By means of the reflector panels that are disposed at side surfaces, the light concentrating capabilities of the device may be enhanced at a lower cost such that the device is capable of easily being designed as an upright structure, which is beneficial in reducing the area occupied by the device.