An optical module, particularly for a motor vehicle, including a light source emitting light rays; a projection optic having an optical axis and an object focal point F.sub.L; a reflector including two cavities each including a reflection surface for reflecting the light rays originating from the light source towards the projection optic; a cut-off device designed to mask part of the light beam, the cut-off device including a transverse cut-off edge, the cut-off edge being arranged at the object focal point F.sub.L of the projection optic.

Provided are a micro light emitting diode display panel and a manufacturing method thereof, and the display panel comprising a substrate and a plurality of micro light emitting diodes, and the substrate comprising a plurality of sub pixel regions arranged in array, and each of the sub pixels being provided with a groove, and an inner surface of the groove being covered with a first reflective electrode and a second reflective electrode which are insulated from each other, and each of the micro light emitting diodes being arranged in one of the grooves, and one pin of the micro light emitting diode being connected with the first reflective electrode and the other pin being connected with the second reflective electrode, and the first reflective electrode and the second reflective electrode reflect light emitted from the micro light emitting diode back to the groove.

An ultraviolet curing module includes a first light source and a second light source. The first light source is configured to emit ultraviolet with a first spectrum. The first spectrum has a first peak wavelength. The second light source is configured to emit ultraviolet with a second spectrum. The second spectrum has a second peak wavelength. Wherein, a difference between the first peak wavelength and the second peak wavelength is greater than 35 nm, and an irradiation range of ultraviolet of the first light source on an irradiated object at least partially overlaps an irradiation range of ultraviolet of the second light source on the irradiated object.

Disclosed is the provision of a fluorescent light source device that can highly efficiently emit fluorescent light and can be configured as a compact device with a simple structure. Further disclosed is the provision of a fluorescent light source device that can achieve high utilization efficiency of fluorescent light when it is utilized in a projector apparatus. A fluorescent light source device of the present invention includes: a plurality of excitation light sources for outputting excitation light; a fluorescent plate for receiving the excitation light and emitting fluorescent light; and an excitation light incident optical system for causing excitation light from each of the plurality of excitation light sources to be incident into a fluorescent light output surface of the fluorescent plate, wherein the excitation light incident optical system includes a mirror member having a plurality of excitation light reflection surfaces for changing respective travel directions of the excitation light output from the respective excitation light sources, and the excitation light reflected by the plurality of excitation light reflection surfaces is divergent light.

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 illumination optical device comprises a collimator, a light source, and an aperture. The collimator comprises a primary mirror, a secondary mirror, a tertiary mirror and a quaternary mirror mutually tilted so as to form a collimator optical path extending between the light source and the aperture and formed, in succession, by the light source, the quaternary mirror, the tertiary mirror, the secondary mirror, the primary mirror and the aperture. The light source is configured to emit light rays, along respective directions, which form a main beam propagating along directions intercepting the quaternary mirror so as to follow the collimator optical path; and a secondary beam propagating along directions not intercepting the quaternary mirror. The illumination optical device is characterised in that the collimator comprises a shielding structure configured to prevent illumination of the aperture by the secondary light beam.

An optoelectronic light emitting device includes a pixel with a transparent or translucent carrier substrate, on which a semiconductor light emitting arrangement with at least one micro LED is arranged. The micro LED extends over a partial area of the pixel. The main radiation direction of the semiconductor light emitting arrangement is directed onto a backscattering surface element arranged behind the transparent carrier substrate in viewing direction. The semiconductor light emitting arrangement includes a beam shaping element.

A lighting device is provided that includes a light source and an optical element. The light source emits primary light having a primary emission characteristic. The optical element has a light entry face and a light exit face. The optical element includes light guiding elements each forming part of the light entry and exit faces. The light entry faces inject the primary light into the optical element. The light guiding elements each have a boundary surface that totally internally reflects the primary light so that the light exit face emits a secondary light. The optical element reduces a divergence of the primary light such that the secondary light has a secondary emission characteristic with an emission angle (?) that is smaller than an emission angle (?) of the primary emission characteristic. The light exit face is larger than the light entry face.

The optical assembly disclosed in the embodiment includes a housing having an inclined bottom surface, a plurality of inner surfaces around an outer periphery of the bottom surface, and a receiving space in which an upper portion is opened; and a lighting module disposed on the inclined bottom surface, wherein the lighting module includes a substrate inclinedly disposed on the inclined bottom surface; at least one light emitting device disposed on the substrate; and a resin layer sealing the light emitting device and the substrate, wherein an upper surface of the resin layer emits light by diffusing light emitted from the light emitting device, wherein the plurality of inner surfaces includes a first inner surface adjacent to the light emitting device, a second inner surface facing the first inner surface, and third and fourth inner surfaces facing each other and disposed between the first and second inner surfaces, wherein a height between the bottom surface of the housing and an upper surface of the housing increases from the first inner surface toward the second inner surface, and decreases from the third inner surface toward the fourth inner surface.

A foam sandwich reflector and a method for making a foam sandwich reflector. The reflector and method incorporate a foam slab having a top and bottom surface. Each of the top and bottom surface of the foam slab have a coating of an adhesive layer. The adhesive coating on the bottom surface of the foam slab is a lower bonding layer that bonds the foam slab to the bottom high modulus layer. The adhesive coating on the top surface of the foam slab is an upper bonding layer that bonds the foam slab to the top high modulus layer; bottom high modulus layer composed of a metal, e.g., aluminum or steel. The reflector and method also include an optically smooth, highly reflective high modulus layer. The reflector is curved in one dimension, and the curve is configured to concentrate light when the reflector is in use.