A light source module includes a light source, a fluorescent ring, a reflector, and a driving device. The light source is configured to emit light. The fluorescent ring has an inner surface. The reflector is configured to reflect the light to form a light spot on the inner surface. The driving device is configured to rotate the reflector to cause the light spot to move along a circular path on the inner surface.

A phosphor wheel and a projection apparatus with the phosphor wheel are disclosed. A phosphor wheel includes a driving motor, a temperature interference element, a substrate and at least one light wavelength converting layer. The driving motor includes a motor body and a rotating member. The motor body drives the rotating member to rotate relative to the motor body along a rotation axis. The temperature interference element is connected with the rotating member and the substrate. The motor body drives the rotating member to rotate the temperature interference element and the substrate relative to the motor body. The substrate includes a first surface and a second surface disposed opposite to each other. The second surface is located between the first surface and the rotating member. The light wavelength converting layer is disposed on the first surface of the substrate.

Configurations and compositions for frameworks supporting optics such as lenses are described that provide an invariant structure regardless of temperature swings, thereby maintaining alignment and focus. Frameworks may comprise tiered structures of materials having multiple distinct coefficients of thermal expansion. An optical framework includes a first framework portion coupled to a first lens and a second framework portion coupled to a second lens. The first framework portion and second framework portion comprise materials having a coefficient of thermal expansion such that expansion of the first framework portion in one direction is offset by expansion of the second framework portion in an opposite direction.

Provided are a polarizing plate and an optical display device comprising same, wherein: the polarizing plate comprises a polarizer, a protection film formed on the surface of the polarizer, and a barrier layer formed on the other surface of the polarizer; the barrier layer is formed of a composition comprising a (meth)acryl-based copolymer, a curing agent, and a silane coupler; and the curing agent comprises a mixture of: a polyisocyanate curing agent containing a plurality of units, each containing an entirety of an alkylene group of two or more carbon atoms having a urethane bonding; and a polyisocyanate curing agent containing an isocyanurate group.

A wavelength conversion element according to an embodiment of the present disclosure includes: a phosphor layer including a plurality of phosphor particles; a refrigerant that cools the phosphor layer; a storage section that stores the phosphor layer and the refrigerant; and a light-transmissive section that seals the storage section in combination with the storage section, and controls an output direction of output light outputted from the phosphor layer.

An optical detector includes a light emitting unit and a light receiving unit that receives a reflected light reflected by a measurement object. The light receiving unit has a detection element and a condenser lens system that collects the reflected light to the detection element. The condenser lens system has a plurality of lenses. The condenser lens system has a temperature change factor that increases the optical power at a high temperature than at a low temperature, and a chromatic aberration factor that decreases the optical power at a long wavelength than at a short wavelength. The optical power of each of the plurality of lenses is adjusted based on a correspondence between a change in temperature and a shift amount of the peak wavelength, so that the chromatic aberration factor balances with the temperature change factor within a predetermined wavelength range.

A headset includes a thermal frame disposed within a housing. A printed circuit board is thermally coupled to the thermal frame. Heat generated by one or more electrical components on the PCB is transmitted to the thermal frame, which distributes the heat uniformly throughout the headset. The thermal frame provides a substantially rigid structural support to which components are coupled and is configured to transfer thermal energy away from the one or more electrical components of the headset and toward an environment located outside of the housing.

A device component assembly including an upper support plate (USP) of glass and a lower support plate (LSP) of metal affixed to the USP, and a manufacturing method are provided. The USP and the LSP include openings of different shapes and sizes. The LSP includes gaps cut in different directions for reducing thermal expansion and tension generated during a temperature shift. Device components including optical, mechanical, electric, electronic, and optoelectronic components are mutually optically aligned and mounted on the USP and/or the LSP based on component requirements. The device components are mounted on the LSP through the openings of the USP. The optical components are affixed to the support plate(s) using a fastening material. One or more heat transfer members are affixed to the LSP for mounting the device component(s) thereon, after mutual optical alignment therebetween. The device component assembly is integrated in an optical or optoelectronic module or system.

A laser module includes: a laser diode bar including a plurality of emitters configured to emit laser light from a front surface and leak light from a rear surface; a housing including a reflecting surface configured to surround a space together with the laser diode bar and reflect, toward the space, light leaked from the rear surface, in a scattering manner; and a detector configured to detect light reflected by the reflecting surface. A laser module includes: a laser diode bar including a plurality of emitters configured to emit laser light from a front surface and leak light from a rear surface; a condenser lens on which light leaked from rear surfaces of all of the plurality of emitters impinges; and a detector configured to detect light transmitted through the condenser lens.

Provided is a fixing device for a diffraction element including an element installation portion where a diffraction element is installed, and an element fixing portion that fixes the diffraction element installed on the element installation portion, wherein the element installation portion includes an element installation surface for curving the installed diffraction element in a discretionary shape, and the element installation surface is formed in an arch-like shape such that deformation of the diffraction element due to pressure of a cooling fluid is reduced.