The invention provides an arrangement (1) comprising a device (1000), wherein the device (1000) comprises a luminescent material comprising element (100) and a light transmissive element (200), wherein: (a) the device (1000) has a first device axis (A1); (b) the luminescent material comprising element (100) comprises a luminescent material (110) configured to emit luminescent material light (111) upon irradiation with first light (11), wherein the luminescent material comprising element (100) has a first length (L1) and a characteristic first dimension (D1) perpendicular to the first length (L1), wherein D1/L1<1; wherein the luminescent material comprising element (100) is configured at a non-zero first distance (r1) from the first device axis (A1), and wherein the luminescent material comprising element (100) at least partly surrounds the first device axis (A1); (c) the light transmissive element (200) is transmissive for the first light (11), wherein the light transmissive element (200) comprises a element light entrance part (201 and an element light escape part (202), wherein the element light escape part (202) and the luminescent material (110) are radiationally coupled; wherein one or more of the following applies: (i) the first device axis (A1) intersects the light transmissive element (200), and (ii) the light transmissive element (200) at least partly surrounds the first device axis (A1); and (d) the luminescent material comprising element (100) is in thermal contact with one or more of (a) the light transmissive element (200) and (b) an optional thermally conductive element (300).

A luminophore having the general empirical formula X′.sub.1−xA′.sub.y(Al.sub.1+zA′.sub.3−z) O.sub.4:E′ that crystallizes in a tetragonal crystal system. X′ may be Mg, Ca, Sr, Ba, and combinations thereof; A′ may be Li, Na, K, Rb, Cs, and combinations thereof; E′ may be Eu, Ce, Yb, Mn, and combinations thereof; 0<x<0.25; y≤x; and z=0.5(2x−y).

A wheel manufacturing method, a wheel, and a projection apparatus are provided. The wheel manufacturing method includes the following. First, a substrate is provided. Next, a thermal conductivity film is formed on at least one surface of the substrate; the thermal conductivity film is formed by using cold spray or supersonic laser deposition to contact multiple thermally conductive particles with the substrate, the thermally conductive particles in the thermal conductivity film occupy >95% of a volume of the thermal conductivity film, and the thermal conductivity film has a void rate of <1%. Next, an optical layer is formed on the substrate or the thermal conductivity film. The wheel, the manufacturing method thereof, and the projection apparatus including the wheel provided by the invention have good thermal conductivity.

An optoelectronic device including light-emitting components, each light-emitting component being adapted to emit a first radiation at a first wavelength, and photoluminescent blocks, each photoluminescent block facing at least one light-emitting component and comprising a single quantum well or multiple quantum wells, photoluminescent blocks being divided into first photoluminescent blocks adapted to convert by optical pumping the first radiation into a second radiation at a second wavelength, second photoluminescent blocks adapted to convert by optical pumping the first radiation into a third radiation at a third wavelength and third photoluminescent blocks adapted to convert by optical pumping the first radiation into a fourth radiation at a fourth wavelength.

An illumination apparatus includes a light source, an optical member, and an integrator. The optical member is rotatable around a rotation axis AR. A planar shape of the optical member is annular around the rotation axis AR. A first surface of the optical member is provided with a recessed and protruding portion. Multiple recessed and protruding structure units are consecutively formed on the optical member . Adjacent recessed and protruding structure units are in a mirror symmetry relation, and the recessed and protruding portions of the adjacent recessed and protruding structure units are smoothly connected together. Recessed portions and protruding portions of the recessed and protruding portion of each recessed and protruding structure unit are smoothly connected together. An area occupied by the recessed and protruding portion of each recessed and protruding structure unit is larger in size than incident light from the light surface.

Provided is a wavelength converting composite member including: a disk-shaped substrate; a first wavelength converting member provided on the substrate and containing a first phosphor that radiates fluorescence due to a parity-forbidden transition; and a second wavelength converting member provided on the substrate and containing a second phosphor that radiates fluorescence due to a parity-allowed transition. The first wavelength converting member and the second wavelength converting member are disposed adjacent to each other along the circumferential direction of the substrate. The first wavelength converting member and the second wavelength converting member are provided on the substrate in such a way that the position of the center of gravity of the entirety of the first wavelength converting member and the second wavelength converting member is located on the rotation axis of the substrate. A light emitting device is provided with the wavelength converting composite member.

A shared optic assembly for combined flood and dot illumination modules is disclosed. The shared optic assembly includes a first high-powered VCSEL element for providing a flood beam and a second high-powered VCSEL element for providing a dot beam, where both the first and second VCSEL elements share the same optics and are incorporated onto the same module for space savings.

A non-lethal dazzling device includes a laser operable in the visible spectrum. The laser can be a relatively low-powered laser, such as a laser having a maximum output power of 2.5 mW, or it can be a higher-powered laser with a drive circuit that lowers the maximum output power to a safe level based on the range of the hostile target from the laser. In certain embodiments, the disclosed non-lethal dazzling device can be coupled to the bridge of a binocular device.

A white light source includes a light source and a phosphor conversion component. The light source emits short wavelength light peaked at a peak wavelength of 570 nanometers or shorter. The phosphor conversion component includes a light conversion layer comprising a phosphor effective to convert the short wavelength light to converted light. The light conversion layer includes light passages comprising openings or passage material that does not comprise the phosphor and is light transmissive for the short wavelength light. The light source is disposed respective to the phosphor conversion component so as to illuminate the light conversion layer with the emitted short wavelength light and to pass the short wavelength light through the light passages.

A lamp projecting a starry sky is provided. The lamp projecting the starry sky includes at least one beam generator, a reflecting member with uneven and irregular reflecting surface, a first motor, and at least one first lens. The first motor is connected to the reflecting member through a connecting shaft, the reflecting member is driven to rotate when the first motor rotates, a light beam generated by the beam generator irradiates onto a first side of the reflecting member along an incident light path, and a light beam emitted from the reflecting member forms a moving and layering nebula projection after passing through the at least one first lens. In the lamp, after passing from the reflecting member, the light beam is magnified by the lens, so that the generated starry sky will not be too bright and dazzling, which effectively enhances the layering sense of the starry sky.