A display apparatus includes: a glass-type frame mounted to a head of an observer; and two image displaying devices for the left and right eyes that are attached to the frame. Each of the image displaying devices includes an image forming device, an optical system making light from the image forming device to be parallel light, and an optical device to which the light from the optical system is incident, and in which the light is guided so as to be output, at least one of the image displaying devices further includes a movement device relatively moving optical axes of the image forming device and the optical system in a horizontal direction, and a convergence angle is adjusted by relatively moving the optical axes of the image forming device and the optical system in the horizontal direction using the movement device depending on an observation position of an observer.

An image display apparatus mountable on a mobile object includes an image light generator and a transmissive member. The image light generator is configured to generate image light and emit the image light to a transmission and reflection member mounted on the mobile object. The transmissive member is disposed in an optical path of the image light between the image light generator and the transmission and reflection member. The transmissive member is configured to transmit the image light from the image light generator. The transmissive member has a cross section with a predetermined curve, the cross section being orthogonal to a predetermined direction inclined with reference to a virtual plane orthogonal to a horizontal direction of the mobile object.

An image display device includes a half mirror, an image output device configured to output a light beam to one face of the half mirror, and a retroreflective member configured to retroreflect at least one of a light beam mirror-reflected off the one face of the half mirror and a light beam transmitted through the one face of the half mirror. The retroreflective member has a base material layer and a plurality of prismatic retroreflective elements formed on one face or two faces of the base material layer. The tilt angle of the optical axis of the prismatic retroreflective element exceeds zero degree.

An image display device includes a half mirror, an image output device configured to output a light beam to one face of the half mirror, and a retroreflective member configured to retroreflect at least one of a light beam mirror-reflected off the one face of the half mirror and a light beam transmitted through the one face of the half mirror. The retroreflective member has a base material layer and a plurality of prismatic retroreflective elements formed on one face or two faces of the base material layer. The height of the prismatic retroreflective elements is 10 m or more and 1,000 m or less. The tilt angle of the optical axis of the prismatic retroreflective elements is zero degree.

Disclosed herein is a laser projection system including a laser projector emitting a laser beam, a movable mirror apparatus reflecting the laser beam toward a surface, and a graphics processing unit (GPU). The GPU is configured to receive video data, estimate a varying speed of movement of the movable mirror apparatus for different positions of the laser beam across the surface, and process the video data based upon the estimated varying speed of movement. An application specific integrated circuit (ASIC) receives the processed video data, and to generate a beam position control signal based upon required or desired movement of the movable mirror apparatus. A laser driver controls the laser projector as a function of the processed video data, and a mirror controller controls the movable mirror apparatus as a function of the beam position control signal.

The invention relates to an imaging device (E) comprising: at least one generator (1) of structured light; an emission first image guide (5, 5) for uplinking the structured light from the generator (1) to an object to be observed; and a return second image guide (5, 5) for downlinking the light reflected by said object to be observed to a system (2) for capturing said reflected light. Each of the two image guides (5, 5) is able to uplink the structured light and downlink the reflected light, and the imaging device comprises an optical switch (3) configurable into three different operating modes.

Architectures are provided for selectively incoupling one or more streams of light from a multiplexed light stream into a waveguide. The multiplexed light stream can have light with different characteristics (e.g., different wavelengths and/or different polarizations). The waveguide can comprise in-coupling elements that can selectively couple one or more streams of light from the multiplexed light stream into the waveguide while transmitting one or more other streams of light from the multiplexed light stream.

A waveguide image combiner is used to transmit a monochrome or full-color image in an augmented reality display. The combiner uses multiple pairs of overlapping incoupling and outcoupling VHOEs to expand the horizontal FOV and a Y expander to expand the vertical FOV. This suitably provides an expanded horizontal and vertical FOV that offers a diagonal FOV50, a horizontal FOV40 and a vertical FOV25. The combiner also delivers a large horizontal eye box up to 20 mm and a vertical eye box of 10 mm while maintaining high light efficiency of the real scene (e.g. >80%). The system is able to use a light engine based on broadband (10 nm30 nm) LEDs and maintain a large horizontal field of view and high transmission of the real imagery. The approach resolves issues with current embodiments including astigmatism, image overlap, color balance, and small light engine pupils leading to reduced eye boxes.

Described is using a combination of which a multi-view display is provided by a combining spatial multiplexing (e.g., using a parallax barrier or lenslet), and temporal multiplexing (e.g., using a directed backlight). A scheduling algorithm generates different views by determining which light sources are illuminated at a particular time. Via the temporal multiplexing, different views may be in the same spatial viewing angle (spatial zone). Two of the views may correspond to two eyes of a person, with different video data sent to each eye to provide an autostereoscopic display for that person. Eye (head) tracking may be used to move the view or views with a person as that person moves.

An immersive device may include a floor having a floor reflective surface. A first sidewall, having a first wall reflective surface, may be coupled to the floor. A second sidewall, having a second wall reflective surface, may be coupled to the floor and coupled to the first sidewall. A third sidewall, having a third wall reflective surface, may be coupled to the floor opposite the first sidewall and coupled to the second sidewall. A fourth sidewall, having a fourth wall reflective surface, may be coupled to the floor opposite the second sidewall and coupled to both the first sidewall and third sidewall. A ceiling, having a ceiling reflective surface, may be coupled to the first, second, third, and fourth sidewalls, and the ceiling may be positioned opposite to the floor.