Abstract: Disclosed is a display apparatus. The display apparatus includes a display region. The display region includes a shift linear-variation region and a shift non-linear-variation region. In the shift linear-variation region, shifts vary linearly with image heights of pixel units along the first direction. In the shift non-linear-variation region, shifts vary non-linearly with image heights of pixel units along the first direction. Further disclosed is a near-eye display device.

Abstract: The invention relates to an optical system for restoring a natural image combined with a digital image, in order to characterise and highlight the objects represented on the natural image. The optical system includes an objective lens, an eyepiece, a semi-reflective plate, a processing unit, capturing means and restoring means. The invention also relates to a method for producing such a digital image.

Abstract: A display system may include a waveguide and an input coupling prism. The waveguide may have a lateral surface with a deformed region. The prism may couple the light into the waveguide at an angle whereby the light first reflects off the deformed region. The display module may include a display panel that provides the light with planar wavefronts. The display module may include a deformation mitigation structure that distorts the planar wavefronts to produce non-planar wavefronts. The shape of the non-planar wavefronts may be selected to reverse distortion to the wavefronts of the light produced by the first reflection of the light off the deformed region of the lateral surface. This may serve to mitigate distortion in the light produced by the deformed region of the lateral surface and may serve to maximize the sharpness images in the image light provided to an eye box.

Abstract: An optical image capturing system comprising, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with negative refractive power has a concave image-side surface. The second lens element, the third lens element and the fourth lens element have refractive power. The fifth lens element has refractive power. The sixth lens element with refractive power has an image-side surface being concave in a paraxial region and includes at least one convex shape in an off-axial region, wherein the surfaces thereof are aspheric. The seventh lens element with refractive power has an image-side surface being concave in a paraxial region and includes at least one convex shape in an off-axial region, wherein the surfaces thereof are aspheric.

Abstract: An optical system is provided. The optical system includes a fixed portion and a first optical assembly. The first optical assembly includes a first movable portion used for holding a first optical element, and a first driving assembly used for driving the first movable portion to move relative to the fixed portion. The fixed portion includes a first frame used for holding a second optical element, the first movable portion is movable relative to the fixed portion, and an image is projected to the second optical element.

Abstract: Device for projecting an image onto an eye, the device comprising a stack comprising light guides, each light guide being coupled to a plurality of diffraction gratings, electrodes, each electrode being associated with a plurality of diffraction gratings of various light guides, each electrode being configured to activate each diffraction grating with which it is associated, a holographic film, the device being characterized in that each light guide extends along a longitudinal axis, in such a way as to form rectilinear segments, two successive rectilinear segments of a given light guide making two different acute angles to the longitudinal axis.

Abstract: A head-mounted display includes: a camera configured to obtain an image by capturing a scene; at least one display configured to display the image obtained by the camera; and a lens comprising a plurality of lens elements arranged between an eye of a user and the at least one display. The lens includes an aperture stop area configured to be at least a portion of an area for facing the eye of the user. The aperture stop area includes a plurality of sub-stop areas corresponding to a plurality of gaze directions by eye rotation, respectively. The modulation values of the lens at sub-fields of 0 degrees of sub-stop areas, from the plurality of sub-stop areas, corresponding to gaze directions of 0, 10, and 20 degrees are greater than 0.7. The modulation values of the lens are measured at a spatial frequency between 15 to 20 cycles/mm.

Abstract: Users exploiting near-to-eye (NR2I) displays for augmented reality and/or correction of low vision are typically wearing these NR2I displays for specific tasks or for extended periods of time, potentially all their time awake. Conflicting tradeoffs between user comfort and minimal fatigue and strain during use, ease of attachment, minimizing intrusiveness and aesthetics should be concurrently balanced with providing an optical vision system that provides the user with a wide field of view, high image resolution, and a large exit pupil for eye placement with sufficient eye clearance. Accordingly, embodiments of the invention provide NR2I displays meeting these conflicts whilst also addressing the inherent variations between user in respect of their head dimensions, head and eye geometry, as well as adapting the displayed content to reflect the user's task at-hand, visual defects or degradations, visual focus and intent upon various regions-of-interest within their field of view.

Abstract: For a region of an image, a portion of a semi-reflective surface of an optical combiner from which light rays of the given region are reflected towards eyes of a user during display via a display unit is determined. For this portion of the semi-reflective surface, a secondary reflection intensity of light rays of another region of the image that undergo secondary reflection from a portion of another surface of the optical combiner is determined. A minimum intensity level of pixels in the image is increased. Intensity values of pixels in said region of the image are adjusted based on the secondary reflection intensity. The image is displayed via the display unit, thereby producing a synthetic light field. The optical combiner reflects the synthetic light field towards the eyes, whilst optically combining the synthetic light field with a real-world light field.

Abstract: A device for generating and displaying an image on an observation field provided for overlaying information and images, including at least one light source for emitting at least one divergent light bundle, a microscanner for variable deflection of the at least one light bundle in a direction of the observation field, wherein the microscanner has at least one axis of rotation for a rotational oscillating movement for deflecting the light bundle, a waveguide which is arranged in a beam path of the light bundle between the light source and the microscanner, a diffractive element which is arranged on or in the waveguide in such a way that the light bundle emitted by the at least one light source is transmitted through the diffractive element before it reaches the microscanner, and a light bundle deflected by the microscanner is coupled into the waveguide through the diffractive element.

Abstract: A display subsystem for a virtual image generation system used by an end user, comprises first and second waveguide apparatuses, first and second projection subassemblies configured for introducing first and second light beams respectively into the first and second waveguide apparatuses, such that at least a first light ray and at least a second light ray respectively exit the first and second waveguide apparatuses to display first and second monocular images as a binocular image to the end user, and a light sensing assembly configured for detecting at least one parameter indicative of a mismatch between the displayed first and second monocular images as the binocular image.

Abstract: A display system includes a display, a removable lens assembly, and a lens detection sensor. The removable lens is removably coupleable to the display. The lens detection sensor detects the removable lens assembly coupled to the display. The display system may further include a head-mounted display unit that includes the display and the lens detection sensor. The display system may lens information from the removable lens with the lens detection sensor, and may provide an indicator of the removable lens according to the lens information.

Abstract: A head-mounted display system comprising a head-mounted display unit; and a positioning and stabilising structure structured and arranged to hold the head-mounted display unit in an operational position over a user's face in use, the head-mounted display unit comprising an interfacing structure constructed and arranged to be in opposing relation with the user's face, wherein the interfacing structure comprises a flexible and resilient face engaging portion, the face engaging portion having a pair of check portions configured to contact the user's checks in use, each check portion comprising at least one loop portion having an at least partially enclosed cross section; wherein the interfacing structure comprises a medial support portion medial of each check portion configured to provide support for the at least one loop portion.

Abstract: Spectacles (1) comprising a face (10) that is provided with at least one lens-type optical unit (4), said face defining a passage (13) for the nose of the user, said passage for the nose being defined by first and second so-called internal edges (14a, b) of the face, said edges being turned toward first and second lateral edges (12a, b) of the face (10), respectively, the spectacles (1) furthermore comprising: —a module (2) for emitting visual information, comprising an element for emitting said visual information; —and a geometric element (3) for returning the converted visual information, which is able to return the converted visual information toward a target zone (6) of the optical unit (4), characterised in that: —the emitting module (2) is placed in the bottom or top portion of a first internal edge (14a) of the face (10), whereas the geometric return element (3) is placed in the top or bottom portion of the first internal edge (14a), the geometric return element (3) being placed in the top portion of t

Abstract: A gonioscopic attachment can attach to a gonioscope and can include atraumatic retention elements that are configured to engage an eye to retain the gonioscope relative to the eye. The gonioscopic attachment can be configured to position the gonioscope so that at least a portion of the concave distal surface of the gonioscopic optical element is spaced apart from the eye, and/or so that the curvature of the distal surface is angularly offset from the curvature of the eye. The gonioscope can include a fixation point configured to be visible to the subject when the gonioscope is positioned on the eye. In some embodiments, the retention elements can be incorporated directly into the gonioscope. A coupling mechanism can couple the gonioscope to a lid speculum. The gonioscope can include a light pipe, which can be configured to directly light into the eye.

Abstract: An electromechanical actuator includes a primary electrode, a secondary electrode overlying at least a portion of the primary electrode, and an electroactive layer disposed between the primary electrode and the secondary electrode, where the electroactive layer has a first curvature when zero voltage is applied between the primary electrode and the secondary electrode, and a second curvature when a non-zero voltage is applied between the primary electrode and the secondary electrode.

Abstract: The present application provides a display device and glasses. The display device includes an optical waveguide, a first and second projectors, at least one optical sensing assembly, and a feedback tracking device. The first and second projectors respectively project a first light with a wavelength of visible light wavelength and a second light with a wavelength of second wavelength to a coupling-in device. The optical sensing assembly is arranged corresponding to a coupling-out device, and includes at least one imaging device. The feedback tracking device is electrically connected to the first projector and the light sensing assembly. The optical sensing assembly is used for receiving the second light reflected by human eye. The feedback tracking device adjusts the first projector according to the second light received by the optical sensing assembly such that the first light coupled out of the coupling-out device follows a line of sight of human eye.

Abstract: An optical unit and an image display device include a display element configured to emit imaging light, a first mirror having partial transparency and configured to reflect a portion of the imaging light emitted from the display element, and a second mirror configured to return the imaging light reflected by the first mirror to the first mirror to form an exit pupil. The imaging light is incident on the first mirror from the display element at a first incident angle, and the imaging light is incident on the first mirror at a second incident angle that is smaller than the first incident angle from the second mirror, and the first mirror includes an angle dependent separation film that shows different separation characteristics for the imaging light according to the difference between the first incident angle and the second incident angle.

Abstract: The invention relates to an optical device, comprising: a lens having an adjustable focal length. According to the invention, a light source which is configured to emit light that is affected by said lens and impinges on at least a first photosensitive element, which is designed to generate a first output signal corresponding to the intensity of light impinging on it, wherein the first photosensitive element is configured to measure only a portion of the intensity distribution of said emitted light, and wherein the light source, the lens and the first photosensitive element are configured such that a change of the focal length of said lens changes the intensity distribution of the emitted light that impinges on the first photosensitive element, so that each focal length of the lens is associated to a specific first output signal generated by the first photosensitive element.

Abstract: An optical layered composite includes: a substrate having a front face, a back face, a thickness ds between the front face and the back face, and a refractive index ns; and a coating applied to the front face, the coating having two regions, the two regions being a region A and a region B. The region A comprises one or more coating layers, each of which satisfies one or both of the criteria: a thickness below 5 nm; or a refractive index of 1.6 or more. The region B comprises one or more coating layers, each of which satisfies one or both of the criteria: a thickness below 5 nm; or a refractive index below 1.6.