Abstract: Point to point transmission holograms are used to provide a scene camera for an augmented reality glasses display system. A glass or plastic substrate acts as spectacle style lens. A holographic medium is applied to a surface of the substrate, within which is recorded a series of point to point transmission holograms. The construction points of the holograms are arranged at the eye and at the pupil of a camera placed, ideally, to the temple side of the user's eye. The recorded transmission holograms act by diffracting a portion of the light from the scene surrounding the user that is heading for the user's eye towards the scene camera. The hologram efficiency is balanced so that the user is still able to see the surrounding scene. The perspective of the view seen by the scene camera is substantially identical to that seen by the user through the lens.

Abstract: Point to point transmission holograms are used to provide a scene camera for an augmented reality glasses display system. A glass or plastic substrate acts as spectacle style lens. A holographic medium is applied to a surface of the substrate, within which is recorded a series of point to point transmission holograms. The construction points of the holograms are arranged at the eye and at the pupil of a camera placed, ideally, to the temple side of the user's eye. The recorded transmission holograms act by diffracting a portion of the light from the scene surrounding the user that is heading for the user's eye towards the scene camera. The hologram efficiency is balanced so that the user is still able to see the surrounding scene. The perspective of the view seen by the scene camera is substantially identical to that seen by the user through the lens.

Abstract: An image projection system utilising a digital mirror device with pivotable mirrors and an asymmetric angular illumination of the mirrors.

Abstract: A waveguide structure for a head up display in which a reflective output coupling structure is formed of a separate, but connected, component to a main waveguide. Light is coupled from the main waveguide to the output coupling structure by evanescent wave coupling. In a method of manufacture for such a waveguide the output coupling structure is attached to the main waveguide using an optical feedback technique.

Abstract: A waveguide structure for a head up display in which a reflective output coupling structure is formed of a separate, but connected, component to a main waveguide. Light is coupled from the main waveguide to the output coupling structure by evanescent wave coupling. In a method of manufacture for such a waveguide the output coupling structure is attached to the main waveguide using an optical feedback technique.

Abstract: Point to point transmission holograms are used to provide a scene camera for an augmented reality glasses display system. A glass or plastic substrate acts as spectacle style lens. A holographic medium is applied to a surface of the substrate, within which is recorded a series of point to point transmission holograms. The construction points of the holograms are arranged at the eye and at the pupil of a camera placed, ideally, to the temple side of the user's eye. The recorded transmission holograms act by diffracting a portion of the light from the scene surrounding the user that is heading for the user's eye towards the scene camera. The hologram efficiency is balanced so that the user is still able to see the surrounding scene. The perspective of the view seen by the scene camera is substantially identical to that seen by the user through the lens.

Abstract: An image projection system utilising a digital mirror device with pivotable mirrors and an asymmetric angular illumination of the mirrors.

Abstract: Point to point transmission holograms are used to provide a scene camera for an augmented reality glasses display system. A glass or plastic substrate acts as spectacle style lens. A holographic medium is applied to a surface of the substrate, within which is recorded a series of point to point transmission holograms. The construction points of the holograms are arranged at the eye and at the pupil of a camera placed, ideally, to the temple side of the user's eye. The recorded transmission holograms act by diffracting a portion of the light from the scene surrounding the user that is heading for the user's eye towards the scene camera. The hologram efficiency is balanced so that the user is still able to see the surrounding scene. The perspective of the view seen by the scene camera is substantially identical to that seen by the user through the lens.

Abstract: An apparatus is disclosed for producing an optical display comprising an optical waveguide including a first diffractive part arranged to receive display light and to diffract the display light into an angle for guided propagation along the optical waveguide. A second diffractive part of the waveguide is optically coupled to the first diffractive part by the optical waveguide and is arranged to receive and to diffract light from the first diffractive part to an angle for output from the optical waveguide. Those external surfaces of the waveguide against which guided light reflects internally are coated with a meta-material having a refractive index of value less than 1.0 (one).

Abstract: A display assembly (105) for mounting on a head-worn device such as a helmet, and having a partially reflective surface located in a field of view of a user, a display projector (40, 50, 200) for projecting light towards the user via the partially reflective surface, a sensor (60, 210) for use in tracking an eye of the user, and a partially reflective imaging surface (120, 220, 225) located in the field of view. The sensor is aligned to receive light forming an image of an eye reflected by the partially reflective imaging surface, the image being for use in the eye-tracking. By using a reflected image, the camera location can be arranged to improve the potentially conflicting needs of keeping the field of view clear, and of having an image from directly in front of the eye, and of limiting the weight and size and imbalance of the helmet. The visor may be used as the partially reflective surface. IR Illumination may be provided by the display projector.

Abstract: An optical system for a colour head up display, the optical system being for guiding image light from an image projection system to an exit pupil. First and second waveguides are utilised, each waveguide guiding a predetermined set of wavelengths.

Abstract: A waveguide structure for a head up display in which a reflective output coupling structure is formed of a separate, but connected, component to a main waveguide. In a method of manufacture for such a waveguide the output coupling structure may be formed by depositing a material on a main waveguide, impressing the reflective structure into that material, and curing the material.

Abstract: A binocular display device comprising two ocular assemblies (1A, 1B) to be worn by a user concurrently with one respective ocular assembly at each eye. Each ocular assembly comprises an outer optical part having a positive optical strength (2A, 2B), an inner optical part (4A, 4B) having a negative optical strength and a transparent slab waveguide display part (3A, 3B) in between them. Substantially collimated display light is output from the waveguide for display, and external light of an external scene is transmitted through the waveguide from the outer optical part for viewing concurrently with the display light. The inner optical part imposes a divergence on the received display light to generate a virtual focal point (f) substantially common to each ocular assembly. In use, an image conveyed by the display light is superimposed on the external scene as a three-dimensional (3D) image when viewed through the binocular display device.

Abstract: The invention relates to a display device for displaying an image over a field of view. The device comprises: an optical arrangement for directing image bearing light from an image source so that the light has rays at a range of angles relative to an injection axis; and an optical waveguide having an input grating for diffracting into the waveguide said light over said range of angles such that all of the diffracted light is totally internally reflected within the waveguide and so that image bearing light output from the waveguide has a field of view corresponding to said range of angles, wherein the input grating is a surface relief grating having a profiled reflective surface and at least one layer of dielectric material conforming to the surface for diffracting light over said range of angles into the waveguide.

Abstract: An optical system for a colour head up display, the optical system being for guiding image light from an image projection system to an exit pupil. First and second waveguides are utilised, each waveguide guiding a predetermined set of wavelengths.

Abstract: A waveguide structure for a head up display in which a reflective output coupling structure is formed of a separate, but connected, component to a main waveguide. In a method of manufacture for such a waveguide the output coupling structure may be formed by depositing a material on a main waveguide, impressing the reflective structure into that material, and curing the material.

Abstract: A waveguide structure for a head up display in which a reflective output coupling structure is formed of a separate, but connected, component to a main waveguide. Light is coupled from the main waveguide to the output coupling structure by evanescent wave coupling. In a method of manufacture for such a waveguide the output coupling structure is attached to the main waveguide using an optical feedback technique.

Abstract: An apparatus is disclosed for producing an optical display comprising an optical waveguide including a first diffractive part arranged to receive display light and to diffract the display light into an angle for guided propagation along the optical waveguide. A second diffractive part of the waveguide is optically coupled to the first diffractive part by the optical waveguide and is arranged to receive and to diffract light from the first diffractive part to an angle for output from the optical waveguide. Those external surfaces of the waveguide against which guided light reflects internally are coated with a meta-material having a refractive index of value less than 1.0 (one).

Abstract: A method for manufacturing a waveguide for a display apparatus comprising providing a planar optical waveguide part (20), depositing upon the optical waveguide part a fluid material (11) curable to form an optically transparent solid, impressing (30) upon the fluid material an impression defining an input diffraction grating region, an intermediate diffraction grating region and an output diffraction grating region wherein the fluid material of the intermediate diffraction grating region is continuous with the fluid material of at least the input diffraction grating region, curing (45) the impressed fluid material to solidify said impression. The physical location of the input diffraction grating is located wholly within the geographical area of the intermediate grating, and the grating vectors of the input diffraction grating and the intermediate diffraction grating are oriented in different respective directions.

Abstract: A binocular display device comprising two ocular assemblies (1A, 1B) to be worn by a user concurrently with one respective ocular assembly at each eye. Each ocular assembly comprises an outer optical part having a positive optical strength (2A, 2B), an inner optical part (4A, 4B) having a negative optical strength and a transparent slab waveguide display part (3A, 3B) in between them. Substantially collimated display light is output from the waveguide for display, and external light of an external scene is transmitted through the waveguide from the outer optical part for viewing concurrently with the display light. The inner optical part imposes a divergence on the received display light to generate a virtual focal point (f) substantially common to each ocular assembly. In use, an image conveyed by the display light is superimposed on the external scene as a three-dimensional (3D) image when viewed through the binocular display device.