A rotation wheel including a turntable and a motor is provided. The turntable is connected to the motor. The turntable has a first surface used for receiving an incident beam and a second surface opposite to the first surface. The first surface includes a light adjusting surface and a connecting surface. The connecting surface is used to connect the light adjusting surface and the motor. The light adjusting surface is perpendicular to a rotating axis of the motor. At least a part of the connecting surface is neither parallel nor perpendicular to the rotating axis.

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.

A projection type image display apparatus including a light source apparatus includes a light emitting element emitting blue light; a phosphor receiving the blue light to emit predetermined light; a heat sink provided with a bottom portion and a plurality of heat radiation fins extending from the bottom portion; and a cooling fan arranged to cool the plurality of heat radiation fins of the heat sink. The light emitting element is attached to the bottom portion of the heat sink. The phosphor is attached to the bottom portion of the heat sink at a predetermined interval from the light emitting element. Heat pipes conducting heat by repeating evaporation and liquefaction of working liquid are embedded in the bottom portion. The heat pipes are respectively provided with sections opposing the light emitting element in a thickness direction of the bottom portion.

A light source apparatus according to an embodiment of the present disclosure includes: a supporting substrate including a phosphor layer on one surface; a driver that causes the supporting substrate to be rotationally driven; a first supporting member that is opposed to another surface opposite to the one surface of the supporting substrate; a plurality of first heat dissipation members each having heat dissipation performance different from each other depending on a distance from the phosphor layer, the plurality of first heat dissipation members being provided concentrically on the other surface of the supporting substrate; and a plurality of second heat dissipation members provided concentrically on a surface, of the first supporting member, that is opposed to the supporting substrate, the plurality of second heat dissipation members being disposed alternately with the plurality of first heat dissipation members.

A photoconversion device includes a holder, a wavelength converter, and an optical element. The holder holds an output portion that outputs excitation light. The wavelength converter includes an incident surface section including a protruding surface to receive the excitation light from the output portion and emits fluorescence in response to the excitation light incident on the incident surface section. The optical element includes a focal point surrounded by the incident surface to direct the fluorescence emitted by the wavelength converter in a predetermined direction.

A photoconversion device includes a holder, a wavelength converter, and an optical element. The holder holds an output portion that outputs excitation light. The wavelength converter includes an incident surface section including a protruding surface to receive the excitation light from the output portion and emits fluorescence in response to the excitation light incident on the incident surface section. The optical element includes a focal point surrounded by the incident surface to direct the fluorescence emitted by the wavelength converter in a predetermined direction.

A luminous light emitting device according to an aspect of the invention includes a motor, a luminescent wheel which is rotated by the motor, and a wheel cover which covers part of the luminescent wheel, and the wheel cover has a plurality of internal heat dissipating plates which are disposed so as to extend from a central portion towards an outer circumference of the luminescent wheel in an inside thereof.

A luminous light emitting device according to an aspect of the invention includes a motor, a luminescent wheel which is rotated by the motor, and a wheel cover which covers part of the luminescent wheel, and the wheel cover has a plurality of internal heat dissipating plates which are disposed so as to extend from a central portion towards an outer circumference of the luminescent wheel in an inside thereof.

According to the present specification there is provided a rotatable heat sink device which comprises a heat sink configured to enclose a cooling fluid, and the heat sink is rotatable about a rotational axis. The heat sink, in turn, comprises a first portion configured to receive thermal energy from a source external to the heat sink, and a second portion configured to dissipate at least a portion of the thermal energy to surroundings external to the device. The device further comprises an optical wavelength conversion material disposed on an outside surface of the first portion of the heat sink, and an agitator disposed inside the heat sink. The agitator is rotationally independent of the heat sink and is configured to promote circulation of the cooling fluid between the first portion and the second portion.

According to the present specification there is provided a rotatable heat sink device which comprises a heat sink configured to enclose a cooling fluid, and the heat sink is rotatable about a rotational axis. The heat sink, in turn, comprises a first portion configured to receive thermal energy from a source external to the heat sink, and a second portion configured to dissipate at least a portion of the thermal energy to surroundings external to the device. The device further comprises an optical wavelength conversion material disposed on an outside surface of the first portion of the heat sink, and an agitator disposed inside the heat sink. The agitator is rotationally independent of the heat sink and is configured to promote circulation of the cooling fluid between the first portion and the second portion.