Abstract: An optical device includes a light modulation device disposed on an optical axis of incident light, and a holding section configured to hold the light modulation device. The holding section includes an inflow part to which a liquid supplied from an outside of the holding section inflows, a flow channel forming part disposed along a circumferential edge of the light modulation device so as to have an annular shape, and having a flow channel through which the liquid flowed from the inflow part circulates, and an outflow part from which the liquid having flowed through the flow channel outflows to the outside of the holding section. At least one of an inside of the inflow part and an inside of the flow channel is provided with at least one projection.

Abstract: In a projection-type display apparatus, a polarization converter, a light-incident-side polarizer, a first liquid crystal device, a first light-exiting-side polarizer, and a retardation film are arranged along the optical path from a light source section to a projection system. The light-incident-side polarizer is a wire grid polarizer including a wire grid integrally provided on the light exiting surface of the polarization converter, and the light-incident-side polarizer and the polarization converter form a single optical part. The first light-exiting-side polarizer is a wire grid polarizer including a wire grid integrally provided on the light exiting surface of the first liquid crystal device, and the first light-exiting-side polarizer and the first liquid crystal device form a single optical part.

Abstract: An optical device includes a light modulation device disposed on an optical axis of incident light, and a holding section configured to hold the light modulation device. The holding section includes an inflow part to which a liquid supplied from an outside of the holding section inflows, a flow channel forming part disposed along a circumferential edge of the light modulation device so as to have an annular shape, and having a flow channel through which the liquid flowed from the inflow part circulates, and an outflow part from which the liquid having flowed through the flow channel outflows to the outside of the holding section. At least one of an inside of the inflow part and an inside of the flow channel is provided with at least one projection.

Abstract: An optical device includes a light modulation device disposed on an optical axis of incident light, and a holding section configured to hold the light modulation device. The holding section includes an inflow part to which a liquid supplied from an outside of the holding section inflows, a flow channel forming part disposed along a circumferential edge of the light modulation device so as to have an annular shape, and having a flow channel through which the liquid flowed from the inflow part circulates, and an outflow part from which the liquid having flowed through the flow channel outflows to the outside of the holding section. At least one of an inside of the inflow part and an inside of the flow channel is provided with at least one projection.

Abstract: A projector includes a light source unit having a light source and a first cooling section adapted to transmit heat of the light source to a first liquid refrigerant circulating, an optical unit having a light modulation device and a second cooling section adapted to transmit heat of the light modulation device to a second liquid refrigerant, a cooling unit adapted to cool the first liquid refrigerant and the second liquid refrigerant, a first connection member connecting the light source unit and the cooling unit to each other, and a second connection member connecting the optical unit and the cooling unit to each other, and at least one of a set of the light source unit and the cooling unit, and a set of the optical unit and the cooling unit is configured to detachably be attached to each other.

Abstract: An optical device includes a light modulation device disposed on an optical axis of incident light, and a holding section configured to hold the light modulation device. The holding section includes an inflow part to which a liquid supplied from an outside of the holding section inflows, a flow channel forming part disposed along a circumferential edge of the light modulation device so as to have an annular shape, and having a flow channel through which the liquid flowed from the inflow part circulates, and an outflow part from which the liquid having flowed through the flow channel outflows to the outside of the holding section. At least one of an inside of the inflow part and an inside of the flow channel is provided with at least one projection.

Abstract: A heat exchanging apparatus includes one inflow channel having an inflow port via which a liquid refrigerant flows in, one outflow channel having an outflow port via which the liquid refrigerant flowing through the outflow channel flows out, and a plurality of channels arranged in a flow direction of the liquid refrigerant flowing through the inflow channel, the plurality of channels connecting the inflow channel the outflow channel and causing the liquid refrigerant flowing from the inflow channel to flow into the outflow channel. The plurality channels are connected to the inflow channel over a portion from the inflow port to a terminal end of the inflow channel. The inflow channel includes a buffer section disposed between the inflow port and the terminal end, the buffer section configured no reduce a flow rate of the liquid refrigerant flowing through the inflow channel.

Abstract: A wavelength conversion device, an illumination device, and a projector that can efficiently cool a phosphor. A wavelength conversion device includes a substrate including a phosphor layer in which a phosphor is included, a rotating device configured to rotate the substrate, a circulating device that circulates a cooling gas to the substrate, and a housing configured to house the substrate and the circulating device. The housing includes a partition wall configured to separate a first space in which the cooling gas is circulated to the substrate by the circulating device and a second space in which the cooling gas radially delivered from the substrate according to the rotation of the substrate circulates.

Abstract: A heat exchange device includes an inner member through which a first liquid circulates, and a pair of outer members through which a second liquid circulates, the inner member is provided with an inner housing through which the first liquid circulates, and a pair of first plate-like members attached to the inner housing so as to be opposed to each other, each of the pair of outer members is provided with an outer housing through which the second liquid circulates, and a second plate-like member attached to the outer housing, and the pair of outer members are disposed on both sides of the inner member so that one of the pair of first plate-like members is opposed to one of the second plate-like members of the pair of outer members, and the other of the pair of first plate-like members is opposed to the other of the second plate-like members.

Abstract: An optical device includes a light modulation device disposed on an optical axis of incident light, and a holding section configured to hold the light modulation device. The holding section includes an inflow part to which a liquid supplied from an outside of the holding section inflows, a flow channel forming part disposed along a circumferential edge of the light modulation device so as to have an annular shape, and having a flow channel through which the liquid flowed from the inflow part circulates, and an outflow part from which the liquid having flowed through the flow channel outflows to the outside of the holding section.

Abstract: A projector and a method of controlling the projector that may give information on suitability of a light source. A projector includes light sources, light modulators (liquid crystal panels) that modulate lights output from the light sources, a projection optical device that projects the lights modulated by the light modulators, a determination unit that determines whether or not a light source unadapted to a mounting position of the projector is attached, and an informing unit (display control unit) that, if a determination that the light source unadapted to the mounting position of the projector is attached is made by the determination unit, gives information in response to a determination result.

Abstract: An optical device includes a light modulation device disposed on an optical axis of incident light, and a holding section configured to hold the light modulation device. The holding section includes an inflow part to which a liquid supplied from an outside of the holding section inflows, a flow channel forming part disposed along a circumferential edge of the light modulation device so as to have an annular shape, and having a flow channel through which the liquid flowed from the inflow part circulates, and an outflow part from which the liquid having flowed through the flow channel outflows to the outside of the holding section.

Abstract: An optical device includes a light modulation device disposed on an optical axis of incident light, and a holding section configured to hold the light modulation device. The holding section includes an inflow part to which a liquid supplied from an outside of the holding section inflows, a flow channel forming part disposed along a circumferential edge of the light modulation device so as to have an annular shape, and having a flow channel through which the liquid flowed from the inflow part circulates, and an outflow part from which the liquid having flowed through the flow channel outflows to the outside of the holding section. At least one of an inside of the inflow part and an inside of the flow channel is provided with at least one projection.

Abstract: A projector includes a first circulation channel formed in a sealed space and where a first fluid for cooling a cooling target arranged within the sealed space circulates, a second circulation channel where a second fluid to which heat is conducted from the first fluid circulates, and a third circulation channel where a third fluid to which heat is conducted from the second fluid circulates and where the heat conducted to the third fluid is radiated in a process of circulation of the third fluid. The first fluid is gas. The second fluid and the third fluid are liquid.

Abstract: A cooling device that can maintain or improve a cooling ability without being affected by fluctuation in an ambient temperature. Gas is supplied to a cooling target to cool the cooling target. A cooling device includes a cooling gas including gas having thermal conductivity higher than the thermal conductivity of the air, a partition wall that closes and stores the cooling target and the cooling gas and is capable of circulating the cooling gas, a cooling section that cools and circulates the cooling gas, a pressure determining section that determines the pressure of the cooling gas, and a cooling control section that controls the cooling section. The cooling control section causes the cooling section to change the pressure of the cooling gas and/or change the circulation speed of the cooling gas on the basis of a result of the determination of the pressure determining section.

Abstract: A projector includes an illumination unit having an optical system including a light source apparatus, an image formation unit having an optical system including liquid crystal panels, a projection unit having an optical system including a projection lens, and a base frame on which the illumination unit and the projection unit to which the image formation unit is coupled are disposed, and a gap is provided between the illumination unit and the projection unit.

Abstract: A cooling device that can maintain or improve a cooling ability without being affected by fluctuation in an ambient temperature. Gas is supplied to a cooling target to cool the cooling target. A cooling device includes a cooling gas including gas having thermal conductivity higher than the thermal conductivity of the air, a partition wall that closes and stores the cooling target and the cooling gas and is capable of circulating the cooling gas, a cooling section that cools and circulates the cooling gas, a pressure determining section that determines the pressure of the cooling gas, and a cooling control section that controls the cooling section. The cooling control section causes the cooling section to change the pressure of the cooling gas and/or change the circulation speed of the cooling gas on the basis of a result of the determination of the pressure determining section.

Abstract: A projector includes an illumination unit which has an optical system including a light source apparatus, an image formation unit which has an optical system including a light modulator (liquid crystal panels), a projection unit which has an optical system including a projection lens, to which the image formation unit is coupled, and which is coupled to the illumination unit, and a base frame which fixes one of the illumination unit and the projection unit and holds the other shiftably in a direction parallel to a projection direction. In a case where the projection unit is fixed to the base frame, second fixing portions (projection unit fixing portions) of the projection unit are fixed, and first fixing portions (illumination unit fixing portions) of the illumination unit are shiftably held.

Abstract: A projector and a method of controlling the projector that may give information on suitability of a light source. A projector includes light sources, light modulators (liquid crystal panels) that modulate lights output from the light sources, a projection optical device that projects the lights modulated by the light modulators, a determination unit that determines whether or not a light source unadapted to a mounting position of the projector is attached, and an informing unit (display control unit) that, if a determination that the light source unadapted to the mounting position of the projector is attached is made by the determination unit, gives information in response to a determination result.

Abstract: A heat exchange device includes an inner member through which a first liquid circulates, and a pair of outer members through which a second liquid circulates, the inner member is provided with an inner housing through which the first liquid circulates, and a pair of first plate-like members attached to the inner housing so as to be opposed to each other, each of the pair of outer members is provided with an outer housing through which the second liquid circulates, and a second plate-like member attached to the outer housing, and the pair of outer members are disposed on both sides of the inner member so that one of the pair of first plate-like members is opposed to one of the second plate-like members of the pair of outer members, and the other of the pair of first plate-like members is opposed to the other of the second plate-like members.