A reflector (2) comprising a plate (4) supported by a substrate (8), wherein the plate has a reflective surface (5) and is secured to the substrate by adhesive free bonding, and wherein a cooling channel array (10) is provided in the reflector. The channels (16) of the cooling channel array may be formed from open channels in a surface of the substrate, the open channels being closed by the plate to create the channels.

The cooling device of the present disclosure has a thermally conductive base that is thermally connected to a heat-generating section, a heat pipe section embedded in the base, and a fin section that has a plurality of fins and is connected to the base in a way that the fin section covers the heat pipe section.

An all-reflective coronagraph optical system for continuously imaging a wide field of view. The optical system can comprise a fore-optics assembly comprising a plurality of mirrors that reflect light rays, about a wide field of view centered around the Sun, to an aft-optics assembly that reflects the light rays to an image sensor. A fold mirror, having an aperture, is optically supported between the fore-optics assembly and the aft-optics assembly. The aperture defines an angular subtense (e.g., 1.0 degree) sized larger than the angular subtense of the Sun. The aperture facilitates passage of a direct solar image and a solar thermal load. A thermal control subsystem comprises a shroud radiatively coupled to each fore-optics mirror and the fold mirror. A cold radiator is thermally coupled to each shroud. Heaters adjacent fore optics mirrors and the fold mirror control temperature to provide a steady state optical system to minimize wavefront error.

A projection lens of an EUV-lithographic projection exposure system with at least two reflective optical elements each comprising a body and a reflective surface for projecting an object field on a reticle onto an image field on a substrate if the projection lens is exposed with an exposure power of EUV light, wherein the bodies of at least two reflective optical elements comprise a material with a temperature dependent coefficient of thermal expansion which is zero at respective zero cross temperatures, and wherein the absolute value of the difference between the zero cross temperatures is more than 6K.

A lighting device (1) for a motor vehicle headlamp, including an optoelectronic component (2), a cooling element (3), a circuit board (4), a stabilisation element (5) and a fastening element (6), wherein the stabilisation element (5) comprises an opening (5a) for enclosing the optoelectronic component (2), wherein at least two stabilisation arms (7) extend away from an edge of the opening (5a), which stabilisation arms (7) are equipped to act on the optoelectronic component (2), wherein the cooling element (3) contacts the optoelectronic component (2) on a side facing away from an active side of the optoelectronic component in such a manner that the same exerts a pressure on the optoelectronic component (2) acting in the direction of the active side of the optoelectronic component (2), wherein the at least two stabilisation arms (7) are designed resiliently and act on the active side of the optoelectronic component (2) in such a manner that the at least two stabilisation arms (7) counteract this pressure of the cooling element (3).

An apparatus and a method for cooling a digital micromirror device are disclosed. For example, the apparatus includes a digital micromirror device (DMD), a socket coupled to the DMD and a spray cooling block coupled to the socket to form an enclosed volume with a surface of the DMD. The spray cooling block includes a first plurality of openings to spray liquid droplets onto the surface of the DMD and a second plurality of openings to collect effluent into an effluent collection volume.

This rotary drive apparatus is arranged to rotate a mirror which reflects incident light coming from a light source, and includes a motor including a rotating portion arranged to rotate about a central axis extending in a vertical direction; a flywheel including the mirror, and rotatably held by the rotating portion; and an impeller directly or indirectly fixed to the rotating portion. The impeller includes a tubular blade support portion arranged to extend along the central axis, and a plurality of blades arranged in a circumferential direction on an outer circumferential surface of the blade support portion. The blade support portion includes an impeller through hole arranged to pass through the blade support portion in an axial direction. The blades are arranged between the light source and the motor. The impeller through hole is arranged to define a light path over which the incident light travels.

A cooling system comprising of a coolant manifold, a heat sink configured to fit in the coolant manifold, a plurality of cooling fins formed in the heat sink, and a coolant configured to flow through the coolant manifold to the heat sink. Diamond shaped pin fins associated with the heat sink create a series of divergent fluid paths for the cooling fluid that helps to create turbulence and improved heat transfer.

A digital micromirror device projector is provided. The digital micromirror device projector includes a digital micromirror device chip, a heat conductive member, a thermo-electric cooler unit and a thermal insulator. The heat conductive member includes a heat conductive plate and a heat conductive protrusion. The heat conductive plate includes a first surface and a second surface, wherein the first surface is opposite to the second surface. The heat conductive protrusion is formed on the first surface. The heat conductive protrusion is thermally connected to the digital micromirror device chip by conduction. The thermo-electric cooler unit includes a cool side and a hot side, wherein the cool side is connected to the second surface. The thermal insulator is attached to the first surface. The thermal insulator surrounds the heat conductive protrusion.

An apparatus and a method for cooling a digital mirror device are disclosed. For example, the apparatus includes a digital mirror device (DMD), a thermal pad, wherein a first side of the thermal pad is coupled to a bottom of a housing of the DMD and a cooling block coupled to a second side of the thermal pad that is opposite the first side. The cooling block includes a plate that includes a plurality of openings that generates a liquid jet of a liquid that is forced through the plurality of openings towards a side of the cooling block coupled to the thermal pad.