Abstract: An optical system for AR displays includes an image generator for generating image light, and an optical combiner for location in a field of view of a user of the optical system between the user and a scene. The optical combiner transmits ambient light from the scene towards a user eye, the ambient light being incident on a first side of the optical combiner. The image generator and the optical combiner are arranged so image light is incident on a second side of the optical combiner, the second side of the combiner being opposite to the first side of the optical combiner. The optical combiner reflects and controls the divergence of the image light so the image light traverses the optical combiner four times and exits the optical combiner as collimated light from the second side of the optical combiner, whilst the ambient light traverses the optical combiner only once.

Abstract: An optical system for an augmented reality (AR) display comprises an image generator for generating image light, and an optical combiner for location in a field of view of a user of the optical system between the user and a scene. The optical combiner is configured to transmit ambient light from the scene towards an eye of the user, the ambient light being incident on a first side of the optical combiner. The image generator and the optical combiner are arranged so that the image light is incident on a second side of the optical combiner, the second side of the combiner being opposite to the first side of the optical combiner.

Abstract: An eye sensing device for integrating in a frame for mounting to a user's head including a laser output unit configured to provide a laser beam for illuminating an eye of the user when in use, and a receiver unit configured to receive reflections of the laser beam and to provide a tracking signal usable for determining a distance or velocity of the eye. The device further includes an optical element configured to apply a first optical function to the laser beam for illuminating the eye and to apply a second optical function to the reflections of the laser beam, and a processing unit for determining a position of the user's eye from the tracking signal.

Abstract: A method of imaging a retina an eye includes determining a position of an eye, measuring light reflected or emitted from a point on a retina of the eye, determining a location of the point on the retina based on the position of the eye. The method further includes repeating the steps of determining and measuring over time to provide multiple measurements of light reflected from points in different locations on the retina, and combining the measurements to form an image of the retina.

Abstract: An eye tracking device for integrating in a frame for mounting to a user's head includes a laser output unit for fixing to the frame. The laser output unit is configured to provide a laser beam for illuminating a cornea of the user's eye when in use. The eye tracking device also includes a receiver unit for fixing to the frame. The receiver unit is configured to receive a reflection of the laser beam and to provide a tracking signal usable for determining a distance or velocity of the cornea. The eye tracking device further includes a processing unit for determining a rotation of the user's eye from the tracking signal.

Abstract: Some embodiments herein are directed to head-mounted Virtual Retina Display (VRD) systems with actuated reflective pupil steering. The display systems include a projection system for generating image content and an actuated reflective optical architecture, which may be part of an optical combiner, that reflects light from the projection system into the user's eyes. The display systems are configured to track the position of a user's eyes and to actuate the reflective optical architecture to change the direction of reflected light so that the reflected light is directed into the user's eyes. The VRDs described herein may be highly efficient, and may have improved size, weight, and luminance such that they are capable of all-day, everyday use.

Abstract: An optical system for an augmented reality (AR) display comprises an image generator for generating image light, and an optical combiner for location in a field of view of a user of the optical system between the user and a scene. The optical combiner is configured to transmit ambient light from the scene towards an eye of the user, the ambient light being incident on a first side of the optical combiner. The image generator and the optical combiner are arranged so that the image light is incident on a second side of the optical combiner, the second side of the combiner being opposite to the first side of the optical combiner.

Abstract: A method for determining a residual retardance of an LCOS (Liquid Crystal on Silicon) panel includes transmitting a light beam to the LCOS panel at an angle of incidence and measuring an intensity of a reflected light beam. The method includes biasing the LCOS panel in a dark state and measuring a dark state intensity of the reflected light beam. The method also includes biasing the LCOS panel in a bright state, and measuring a bright state intensity of the reflected light beam. A residual retardance of the LCOS panel is determined based on a contrast ratio of the bright state intensity and the dark state intensity. The method can also include selecting a compensator for the LCOS panel based on the residual retardance.

Abstract: A method for determining a residual retardance of an LCOS (Liquid Crystal on Silicon) panel includes transmitting a light beam to the LCOS panel at an angle of incidence and measuring an intensity of a reflected light beam. The method includes biasing the LCOS panel in a dark state and measuring a dark state intensity of the reflected light beam. The method also includes biasing the LCOS panel in a bright state, and measuring a bright state intensity of the reflected light beam. A residual retardance of the LCOS panel is determined based on a contrast ratio of the bright state intensity and the dark state intensity. The method can also include selecting a compensator for the LCOS panel based on the residual retardance.

Abstract: Disclosed herein is a lens for a wearable projection system. The lens includes a holographic optical element embedded within the lens and covering a portion of the viewable area of the lens. The lens can be manufactured by filling a cavity in a lens blank with a photosensitive material and exposing the photosensitive material to a number of light beams to form the HOE.

Abstract: Disclosed herein is a lens for a wearable projection system. The lens includes a holographic optical element embedded within the lens and covering a portion of the viewable area of the lens. The lens can be manufactured by filling a cavity in a lens blank with a photosensitive material and exposing the photosensitive material to a number of light beams to form the HOE.

Abstract: A device for self-tracking a light source, including a focusing optical device configured to focus incoming light to a focal spot, an adaptive device configured to reflect the light of the focal spot and arranged to provide for a phase change at an area of the focal spot of the incoming light to generate a reflected light, and a light guide located between the focusing optical device and the adaptive device, the light guide configured to capture the reflected light of the adaptive device.

Abstract: A device for self-tracking a light source, including a focusing optical device configured to focus incoming light to a focal spot, an adaptive device configured to reflect the light of the focal spot and arranged to provide for a phase change at an area of the focal spot of the incoming light to generate a reflected light, and a light guide located between the focusing optical device and the adaptive device, the light guide configured to capture the reflected light of the adaptive device.