Abstract: A projection device includes a drive housing that includes a protruding portion protruding from a central portion, a projection lens that includes a first rotation mechanism, and fans that draw in or discharge gas; the central portion includes a first A side surface that is provided in a first A direction X1 corresponding to one side in a first direction X and a second A side surface that is provided in a first B direction X2 corresponding to the other side in the first direction X; the protruding portion includes a first B side surface in the first A direction X1 and includes a second B side surface, which faces the projection lens, in the first B direction; and the fans face the second A side surface and the second B side surface.

Abstract: A first holding member holds a first optical system and a first mirror, and has a first junction surface. A second holding member holds a second optical system and a second mirror, and has a second junction surface. A junction portion is configured such that, in a state where the first junction surface and the second junction surface are aligned with each other, the second holding member is capable of being shifted in a direction of both the junction surfaces and rotated around an optical axis, and makes it possible to perform optical axis alignment. An emission-side optical axis of the first optical system and an incidence-side optical axis of the second optical system are aligned with each other, and thus a U-shaped optical path is formed by the first and second optical systems.

Abstract: A projection lens has a first rotary tube, a first fixed tube at which the first rotary tube is rotatably mounted, a first protrusion portion that is provided at the first rotary tube and that protrudes from the first rotary tube, and a first abutment surface that is provided at the first fixed tube and that abuts upon the first protrusion portion. The projection lens includes a first engaging portion at which the first protrusion portion and the first abutment surface include first engaging portions that face each other in a direction of a first incidence-side optical axis and a first pressing portion that presses the first protrusion portion against the first abutment surface.

Abstract: There is provided a projection lens that is mounted on a housing of a projection device including an electro-optical element. The projection lens comprises an optical system through which light passes, a second holding unit through which light parallel to a second optical axis passes and which is moved rotationally with respect to the housing, a third holding unit through which light parallel to a third optical axis obtained from bending of the second optical axis passes and which is moved rotationally with respect to the second holding unit, an electric drive unit that electrically controls rotational movement of the second holding unit with respect to the housing, rotational movement of the third holding unit with respect to the second holding unit, or drive of the optical system, and a cover part that covers the electric drive unit.

Abstract: A first holding member holds a first optical system and a first mirror, and has a first junction surface. A second holding member holds a second optical system and a second mirror, and has a second junction surface. A junction portion is configured such that, in a state where the first junction surface and the second junction surface are aligned with each other, the second holding member is capable of being shifted in a direction of both the junction surfaces and rotated around an optical axis, and makes it possible to perform optical axis alignment. An emission-side optical axis of the first optical system and an incidence-side optical axis of the second optical system are aligned with each other, and thus a U-shaped optical path is formed by the first and second optical systems.

Abstract: There is provided a projection lens that is mounted on a housing of a projection device including an electro-optical element. The projection lens includes a first holding frame through which light emitted from the housing passes, a second reflective part that refracts an optical axis of light emitted from the first holding frame and includes a pair of side surfaces facing each other, and a second holding frame that holds the second reflective part and includes a pair of first holes provided at positions corresponding to the pair of side surfaces; and each of the pair of side surfaces has a gap between itself and the second holding frame.

Abstract: A first holding member holds a first optical system and a first mirror, and has a first junction surface. A second holding member holds a second optical system and a second mirror, and has a second junction surface. A junction portion is configured such that, in a state where the first junction surface and the second junction surface are aligned with each other, the second holding member is capable of being shifted in a direction of both the junction surfaces and rotated around an optical axis, and makes it possible to perform optical axis alignment. An emission-side optical axis of the first optical system and an incidence-side optical axis of the second optical system are aligned with each other, and thus a U-shaped optical path is formed by the first and second optical systems.

Abstract: A projection lens that is mounted on a housing of a projection device including an electro-optical element includes a first holding unit which is connected to the housing and through which light parallel to a first optical axis serving as an optical axis corresponding to luminous flux incident from the housing passes, a second holding unit through which light parallel to a second optical axis obtained from bending of the light parallel to the first optical axis passes and which is rotated with respect to the first holding unit in a rotatable range less than 360°, a first rotation control unit that controls rotation of the second holding unit, and a first electric drive unit. The first rotation control unit is provided on a first outer peripheral surface of one of the first holding unit and the second holding unit. The first electric drive unit is provided on a second outer peripheral surface of the other of the first holding unit and the second holding unit.

Abstract: A projection apparatus includes: a fixed body that contains a light source and a light modulation element for spatially modulating light from the light source based on image data; a movable body that includes a reflecting member for reflecting light emitted from the fixed body, is rotatably supported by the fixed body around a rotation axis parallel to an incidence direction of the light onto the reflecting member, and is movable with respect to the fixed body; a fixed body side electrode; a movable body side electrode; a driving unit; and an optical member that is provided at the movable body and driven by the driving unit, and the fixed body includes a driving controller that controls the driving unit in a case where the movable body side electrode is electrically conducted with the fixed body side electrode.

Abstract: A projection lens that is mounted on a housing of a projection device including an electro-optical element includes a first holding unit which is connected to the housing and through which light parallel to a first optical axis serving as an optical axis corresponding to luminous flux incident from the housing passes, a second holding unit through which light parallel to a second optical axis obtained from bending of the light parallel to the first optical axis passes and which is rotated with respect to the first holding unit in a rotatable range less than 360°, a first rotation control unit that controls rotation of the second holding unit, and a first electric drive unit. The first rotation control unit is provided on a first outer peripheral surface of one of the first holding unit and the second holding unit. The first electric drive unit is provided on a second outer peripheral surface of the other of the first holding unit and the second holding unit.

Abstract: There is provided a projection lens that is mounted on a housing of a projection device including an electro-optical element. The projection lens includes a first holding frame through which light emitted from the housing passes, a second reflective part that refracts an optical axis of light emitted from the first holding frame and includes a pair of side surfaces facing each other, and a second holding frame that holds the second reflective part and includes a pair of first holes provided at positions corresponding to the pair of side surfaces; and each of the pair of side surfaces has a gap between itself and the second holding frame.

Abstract: A projection lens has a first rotary tube, a first fixed tube at which the first rotary tube is rotatably mounted, a first protrusion portion that is provided at the first rotary tube and that protrudes from the first rotary tube, and a first abutment surface that is provided at the first fixed tube and that abuts upon the first protrusion portion. The projection lens includes a first engaging portion at which the first protrusion portion and the first abutment surface include first engaging portions that face each other in a direction of a first incidence-side optical axis and a first pressing portion that presses the first protrusion portion against the first abutment surface.

Abstract: There is provided a projection lens that is mounted on a housing of a projection device including an electro-optical element. The projection lens comprises an optical system through which light passes, a second holding unit through which light parallel to a second optical axis passes and which is moved rotationally with respect to the housing, a third holding unit through which light parallel to a third optical axis obtained from bending of the second optical axis passes and which is moved rotationally with respect to the second holding unit, an electric drive unit that electrically controls rotational movement of the second holding unit with respect to the housing, rotational movement of the third holding unit with respect to the second holding unit, or drive of the optical system, and a cover part that covers the electric drive unit.

Abstract: A projection lens, which is a projection lens to be attached to a projection apparatus body having an electro-optical device, includes: a first focus optical system; a first holding portion that has an attachment portion and on which light along a first optical axis extending in first directions is incident; and an adjustment frame that holds the first focus optical system. When one of the first directions is defined as a first A direction and the other of the first directions is defined as a first B direction, the first focus optical system is positioned further in the first A direction than the attachment portion, and light along the first optical axis travels in the first B direction. The adjustment frame is movable in the first directions relative to the first holding portion.

Abstract: A projection lens is separated into a first optical system that is disposed so as to be closer to an image forming panel and a second optical system that includes a mirror and is disposed so as to be closer to a screen which is a projection surface by the second mirror. The second optical system is set in a first position and a second position by inverting the second optical system around a second optical axis with respect to the first optical system by 180° by an inverting unit. An orientation of a projected image onto the screen is set in the first position and the second position by inverting the image displayed on the image forming panel according to the first position and the second position. It is possible to achieve projection for positioning a center of the screen above or under the optical axis by switching between the first position and the second position.

Abstract: A projection lens includes a lens barrel that accommodates an optical system from which light incident from the housing exits, and that has a first rotary tube that rotates around an optical axis and a first fixed tube at which the first rotary tube is rotatably mounted; and a first conduction portion for realizing electrical conduction, the first conduction portion having a fixed electrode that is provided at the first fixed tube and a rotary electrode that is provided at the first rotary tube and that rotates as a result of rotating the first rotary tube, the rotary electrode being disposed at a position that faces the fixed electrode and contacting the fixed electrode at least at a rotation position that has been preset.

Abstract: A first holding member holds a first optical system and a first mirror, and has a first junction surface. A second holding member holds a second optical system and a second mirror, and has a second junction surface. A junction portion is configured such that, in a state where the first junction surface and the second junction surface are aligned with each other, the second holding member is capable of being shifted in a direction of both the junction surfaces and rotated around an optical axis, and makes it possible to perform optical axis alignment. An emission-side optical axis of the first optical system and an incidence-side optical axis of the second optical system are aligned with each other, and thus a U-shaped optical path is formed by the first and second optical systems.

Abstract: A projection device includes a drive housing that includes a protruding portion protruding from a central portion, a projection lens that includes a first rotation mechanism, and fans that draw in or discharge gas; the central portion includes a first A side surface that is provided in a first A direction X1 corresponding to one side in a first direction X and a second A side surface that is provided in a first B direction X2 corresponding to the other side in the first direction X; the protruding portion includes a first B side surface in the first A direction X1 and includes a second B side surface, which faces the projection lens, in the first B direction; and the fans face the second A side surface and the second B side surface.

Abstract: A projection apparatus includes: a fixed body that contains a light source and a light modulation element for spatially modulating light from the light source based on image data; a movable body that includes a reflecting member for reflecting light emitted from the fixed body, is rotatably supported by the fixed body around a rotation axis parallel to an incidence direction of the light onto the reflecting member, and is movable with respect to the fixed body; a fixed body side electrode; a movable body side electrode; a driving unit; and an optical member that is provided at the movable body and driven by the driving unit, and the fixed body includes a driving controller that controls the driving unit in a case where the movable body side electrode is electrically conducted with the fixed body side electrode.

Abstract: A first holding member holds a first optical system and a first mirror, and has a first junction surface. A second holding member holds a second optical system and a second mirror, and has a second junction surface. A junction portion is configured such that, in a state where the first junction surface and the second junction surface are aligned with each other, the second holding member is capable of being shifted in a direction of both the junction surfaces and rotated around an optical axis, and makes it possible to perform optical axis alignment. An emission-side optical axis of the first optical system and an incidence-side optical axis of the second optical system are aligned with each other, and thus a U-shaped optical path is formed by the first and second optical systems.