The present invention relates to an optical system for concentrating incoming light comprising a plurality of concentrating optical elements (100) with a front surface (102) arranged to receive incoming light and a back surface (103) arranged to exit light, wherein the front surface is larger than the back surface. Adjacent concentrating optical elements are separated by gaps (101) and the refractive index of the material in a concentrating optical element is higher than the refractive index of the gap. The geometry of the concentrating optical elements is optimized to enhance the light concentration.

For omnidirectional structured light projection, a light source illuminates a conical mirror towards an apex along a central axis. A pattern mask corrects a deformation pattern of the conical mirror to form a plurality of points in a point cloud from the light source.

A compact celestial tracker includes a platform, a rotation stage that rotatably coupled to the platform to rotate a plane of the platform about a rotation axis and that supports the platform on a substrate, an off-axis parabolic mirror mounted to one side of the platform and having a focal plane directed at an acute angle that is between the rotation axis and the plane of the platform to reflect and focus the beam at a point above another side of the platform, and a detector coupled to the other side of the platform to receive and detect the reflected and focused beam.

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.

According to one embodiment, an illumination device includes a light source module, and a reflector opposed to the light source module. The reflector includes a plurality of incidence openings on which light from the light source module is made incident, a plurality of emission openings opposed to the incidence openings, a plurality of reflective surfaces extending from the incidence openings to the emission openings, respectively, and reflective films formed on the reflective surfaces. The reflector includes a plurality of blocks, and the blocks are bonded to each other to form the reflector.

Provided are a laser combining apparatus and a display device. The laser combining apparatus includes a first group of light sources including first light source arrays, a second group of light sources including second light source arrays, a reflection apparatus including first and second reflection strips, a light converging apparatus and a light collection apparatus. Each first reflection strip reflects light emitted from at least one first light source array, each second reflection strip reflects light emitted from at least one second light source array, and light emitted from each first reflection strip and light emitted from each second reflection strip are also guided to the light converging apparatus. The light converging apparatus converges the light emitted from the first reflection strips and the second reflection strips to the light collection apparatus. The light collection apparatus collects the light converged by the light converging apparatus and then emitting same.

An optical article for illuminating building interiors including a reflective grid and a light diffusing element positioned between the reflective grid and a light source. The reflective grid includes one or more arrays of transverse reflective surfaces and is configured to partially transmit and partially redirect incident light over a broad angular range.

Aspects relate to a compact material analyzer including a light source, a detector, and a module including a first optical window on a first side of the module, a second optical window on a second side of the module opposite the first side, and a light modulator. The light source produces input light at a high power that is passed through the first optical window to the light modulator. The light modulator is configured to attenuate the input light, produce modulated light based on the input light, and direct the modulated light through the second optical window to the sample. The modulated light produced by the light modulator is at a lower power safe for the sample. The detector is configured to receive output light from the sample produced from interaction with the modulated light through the second optical window and to detect a spectrum of the output light.

An electromagnetic radiation collecting device is presented, which is particularly useful for the collection of solar radiation, providing optimal radiation collection throughout the daytime, and throughout yearly seasonal changes. The collector entails a redundant number of static collectors arranged in such a manner as to provide maximal and chronologically evened collection outline.

3D metal printing process for producing a spatial metal product essentially from a metal powder or metal filaments as starting material, the powder or the filaments being built up layer by layer by applying layers of starting material to a respective previously produced layer and selective local heating of predetermined points of the layer above a sintering or melting temperature of the powder and sintering or fusing of the molten points with the underlying layer and optional annealing of the points. wherein at least the respective newly applied starting material layer is pre-heated and/or post-treated for thermal stress compensation following the local heating of the predetermined points by means of two-dimensional irradiation of IR radiation in such a way that a radiation spot with an area of at least 5 mm2, more particularly of more than 20 mm2 and even more particularly of more than 100 mm2, is formed on the surface of the starting material layer.