Abstract: An illumination device with projector includes a projector having a projection optical system, a projector holding section configured to hold the projector, a stand part to be coupled to the projector holding section, and a shade which is configured to cover a periphery of the projector holding section, and is provided with a projection opening through which projection light emitted from the projector is transmitted. The projector holding section is provided with an angle adjustment mechanism for changing a tilt angle of the projector centering on an end portion at an exit side of the projector.

Abstract: A wavelength conversion device according to the present disclosure includes a wheel substrate, a phosphor layer formed on the wheel substrate, and a cooling fin unit disposed on the wheel substrate. The cooling fin unit has a base part to be bonded to the wheel substrate. A surface of the wheel substrate includes a first area corresponding to the phosphor layer, and a second area located closer to the central axis than the first area, the surface of the wheel substrate and a surface at the wheel substrate side of the base part are separated from each other to form a space between the wheel substrate and the base part, and a coupling part configured to thermally couple the surface of the wheel substrate and the surface at the wheel substrate side of the base part is disposed in at least the second area of the second surface.

Abstract: A wavelength conversion device includes a rotating body having a disk-like shape, a wavelength converter disposed in a portion at circumferential edge side of the rotating body so as to form a ring-like shape centering on a rotational axis of the rotating body, and a motor configured to rotate the rotating body, wherein the rotating body includes a vapor chamber, the vapor chamber includes a sealed container configured to contain a working fluid changing in phase between a vapor phase and a liquid phase, the sealed container includes a heat receiver which is arranged in an outer circumferential part of the sealed container, and which is configured to receive heat of the wavelength converter, and a heat dissipater which is arranged at the rotational axis side of the heat receiver, and which is configured to release the heat received by the heat receiver.

Abstract: An illumination device with a projector includes a base, a shade having a side-surface shade surrounding an outer circumferential side of the base, an upper-surface shade disposed above the base, and a lower-surface shade disposed below the base, a projector which is installed on the base, and projects image light toward the side-surface shade, and an illumination unit for illuminating the upper-surface shade and the lower-surface shade from inside the shade. The side-surface shade is provided with a mirror surface part for reflecting light which shines on the side-surface shade from the outside. The mirror surface part is provided with an image light transmission part which the image light enters. The image light transmission part is a semi-transmissive mirror. Therefore, the image light can be projected via the semi-transmissive mirror, but a projection opening of the projector is not seen from the outside.

Abstract: A heat diffuser according to an aspect of the present disclosure includes a body section including a heat receiver that receives heat from a heat source, a heat dissipater that dissipates the heat received by the heat receiver, and a housing compartment that houses and seals an operating fluid. The operating fluid is water. The housing compartment is made of a metal material having specific gravity smaller than that of copper. The inner surface of the housing compartment is covered with a coating layer. The coating layer is a resin coat containing any of alkyd resin, silicone resin, ethylene-chlorotrifluoroethylene copolymer resin, and tetrafluoroethylene-perfluoro alkyl vinyl ether copolymer resin. The heat from the heat receiver vaporizes the operating fluid in the liquid form, and the heat dissipation performed by the heat dissipater condenses the operating fluid.

Abstract: A phosphor wheel includes a wheel element including a disk-shaped substrate having a first surface and a second surface opposite from the first surface, an annular phosphor disposed at the first surface on a circle around the center of the substrate, and a plurality of fins disposed at the second surface and extending outward from the side facing the center of the substrate, and a balance corrector that corrects nonuniformity of the rotational balance of the wheel element, and the balance corrector includes a first balancer and a second balancer that is lighter than the first balancer.

Abstract: A wavelength conversion device according to the present disclosure includes a wheel substrate, a phosphor layer formed on the wheel substrate, and a cooling fin unit disposed on the wheel substrate. The cooling fin unit has a base part to be bonded to the wheel substrate. A surface of the wheel substrate includes a first area corresponding to the phosphor layer, and a second area located closer to the central axis than the first area, the surface of the wheel substrate and a surface at the wheel substrate side of the base part are separated from each other to form a space between the wheel substrate and the base part, and a coupling part configured to thermally couple the surface of the wheel substrate and the surface at the wheel substrate side of the base part is disposed in at least the second area of the second surface.

Abstract: An illumination device with projector includes a projector having a projection optical system, a projector holding section configured to hold the projector, a stand part to be coupled to the projector holding section, and a shade which is configured to cover a periphery of the projector holding section, and is provided with a projection opening through which projection light emitted from the projector is transmitted. The projector holding section is provided with an angle adjustment mechanism for changing a tilt angle of the projector centering on an end portion at an exit side of the projector.

Abstract: An illumination device with a projector includes a base, a shade having a side-surface shade surrounding an outer circumferential side of the base, an upper-surface shade disposed above the base, and a lower-surface shade disposed below the base, a projector which is installed on the base, and projects image light toward the side-surface shade, and an illumination unit for illuminating the upper-surface shade and the lower-surface shade from inside the shade. The side-surface shade is provided with a mirror surface part for reflecting light which shines on the side-surface shade from the outside. The mirror surface part is provided with an image light transmission part which the image light enters. The image light transmission part is a semi-transmissive mirror. Therefore, the image light can be projected via the semi-transmissive mirror, but a projection opening of the projector is not seen from the outside.