A system is provided. The system includes a translucent display positioned such that a first face is a display face and that a second face is a projection face and at least one projector configured to project an image on the second face of the translucent display. The image is displayed on the first face. The system also includes at least one sensor configured to transmit a signal when triggered and a projector controller in communication with the at least one projector and the at least one sensor. The projector controller is programmed to receive a signal from the at least one sensor and instruct the at least one projector to project at least one image on the translucent display in response to the signal from the at least one sensor.

The disclosed structured light projector may include (1) a light source having a light-emitting side that emits light, (2) a solid optical spacer element having a first side securely coupled to the light-emitting side of the light source, and (3) a diffractive optical element (DOE) stack including one or more DOEs, where the DOE stack includes (a) a light-receiving side securely coupled to a second side of the solid optical spacer element opposite the first side, and (b) a light-emitting side opposite the light-receiving side that emits structured light in response to the light received from the light-emitting side of the light source via the solid optical spacer element. Various other devices and methods are also disclosed.

A projector includes a projection lens and a projector body. In the projection lens, a U-shaped optical path is formed by optical axis to optical axis. A lens barrel is a U-shaped barrel. A housing of the projector body includes a storage section. The projection lens is supported rotatably about the optical axis with respect to the housing, in an up-down direction and a right-left direction of the housing perpendicular to the optical axis, between a first position where the projection lens is stored inside a storage section provided in the housing and a second position where the projection lens is protruding from the housing.

The present technology relates to an information processing apparatus, an information processing method, and a recording medium that can improve user's operability on a video image. The information processing apparatus includes: a coordinate system setting unit configured to change an input coordinate system on the basis of a user operation; and a video image control unit configured to control a content in a video image on the basis of a first input coordinate system, and control a display position of the video image on the basis of a second input coordinate system. The present technology can be applied to, for example, a system for displaying a video image on a wall or the like of a room by using a drive-type display device capable of moving a display position of the video image.

A projection lens, which is mounted on a housing of a projection device including an electro-optical element, includes a first holding part that holds a first optical system disposed along a first optical axis along which light emitted from the housing passes, a first reflective part that bends light parallel to the first optical axis to form light parallel to a second optical axis, a second reflective part that bends the light parallel to the second optical axis to form light parallel to a third optical axis, and a second holding part holds the first reflective part and the second reflective part. A distance along the first optical axis between a first lens, which is disposed to be closest to a reduction side in the first optical system, and the first reflective part is longer than a distance along the second optical axis between the first reflective part and the second reflective part. The first optical system includes a second lens that is disposed to be closest to an enlargement side to form an intermediate image of an optical image of the electro-optical element.

A light blocking member according to the present disclosure is for a projection video display device provided with an optical system that projects video light and a projection lens on which the video light is incident, the light blocking member being disposed between the optical system and the projection lens, the light blocking member including: a first light blocking portion that absorbs and converts into heat a part of unnecessary light unnecessary for the projection lens in the video light; and a reflector that reflects, as reflected light, light that is a part of the unnecessary light and that is not absorbed by the first light blocking portion.

The lens apparatus includes: a first optical unit (FOU) changes a field curvature amount of a projection optical system (POS) by shifting in an optical axis direction (OAD) of POS, a second optical unit (SOU) including a focus adjustment unit moves during focusing and a zoom adjustment unit moves during zooming, the SOU changing projection magnification and focus position of POS by shifting in OAD of POS, a first detection unit (FDU) detecting a position of FOU, a memory stores change information regarding changes in projection magnification and focus position of POS through shift of FOU and a control unit controls SOU to shift so as to reduce changes in projection magnification and focus position of POS at the same time caused due to shift of FOU, when field curvature amount of POS is changed, based on position of FOU detected by FDU and change information stored in memory.

A combined optical lens module and an optical imaging device with the combined optical lens module are provided. The optical imaging device includes a visible light-emitting unit, an invisible light-emitting unit, at least one visible light lens group and at least one invisible light lens group. After a visible light beam is transmitted through the at least one visible light lens group, a propagating direction of the visible light beam is changed. After an invisible light beam is transmitted through the at least one invisible light lens group, a propagating direction of the invisible light beam is changed.

To provide a projection optical system that can cover a wide range of magnification changes with a focus lens group in which the number of constituted lenses is decreased, and a projector including the projection optical system. A 1-2nd lens group as the focus lens group includes an F1 lens group configured of one positive lens, an F2 lens group configured of one positive lens and one negative lens, and an F3 lens group configured of one negative lens. At least the F2 lens group is caused to move when focusing is performed in response to a magnification change.

A projector that projects image light on a projection surface includes a light modulator that modulates light emitted from a light source based on image information to form the image light, a projection system that projects the image light modulated by the light modulator on the projection surface, a light modulator moving section that changes the position of the light modulator, a vibration detecting section that detects vibration acting on the projector, and a controller that causes the light modulator moving section to change the position of the light modulator based on the vibration detected by the vibration detecting section.