Abstract: Some implementations of the disclosure relate to an optical system, including: a first light source; a secondary light source that is optically coupled to the first light source; a reflective element that is transparent with respect to the first light source but reflective with respect to the secondary light source, the reflective element being disposed between the first light source and the secondary light source; and a semi-reflective layer disposed on the secondary light source, such that reflection of light from the secondary light source by the reflective element and back through the semi-reflective element results in greater than 25% of the light from first light source exiting the optical system.

Abstract: A near-eye optical system, for receiving an image beam, includes an optical waveguide, configured to expand the image beam in a direction, and including a near-eye surface and a structure surface. The structure surface includes a light incident area and is opposite to the near-eye surface. The light incident area is located in a transmission path of the image beam. A plurality of reflective inclined surfaces are disposed on the structure surface and located at one side of the light incident surface and arranged along the direction. The structure surface is sequentially divided into the light incident area and a plurality of optical areas along the direction. A line number density of the reflective inclined surfaces in the optical area closest to the light incident area in the direction is less than a line number density of the reflective inclined surfaces in the optical area furthest from the light incident area in the direction.

Abstract: A waveguide display includes a waveguide, three input gratings configured to couple display light in different respective colors into the waveguide, one or more first middle gratings configured to receive and redirect the display light from the three input gratings, a second middle grating configured to diffract, at two or more regions of the second middle grating, the display light from the one or more first middle gratings, and an output grating configured to couple the display light from each of the two or more regions of the second middle grating out of the waveguide at two or more regions of the output grating.

Abstract: An electronic device such as a head-mounted device may have a display that produces a display image. The head-mounted device may have an optical system that merges real-world images from real-world objects with display images. The optical system provides the real-world images and display images to an eye box for viewing by a user. The optical system may use time interleaving techniques and/or polarization effects to merge real-world and display images. Switchable devices such as polarization switches and tunable lenses may be controlled in synchronization with frames of display images. Geometrical phase lenses may be used that exhibit different lens powers to different polarizations of light.

Abstract: This invention is augmented reality eyewear with a radial, honeycomb, or nested-ring array of selectively-movable reflective elements. These reflective elements can each be moved from a first configuration which is parallel to a line of sight from an eye to a second configuration which is perpendicular to this line of sight. The second configuration reflects light displaying a virtual image to the eye and blocks environmental light in the area of the virtual image. Since light from the environment does not shine through the virtual object, the virtual object appears solid instead of “ghost like.

Abstract: A display device may include a plurality of tiled spatial light modulators (SLMs) imparting image information upon respective light beams to obtain image beams. Pupil steering optics are configured to steerably direct the image beams towards a same or different exit pupil locations within an eyebox of the display device, providing exit pupil replication and/or an expanded field of view. An eye tracking system provides location information of the user's eye, enabling the pupil steering optic to direct at least some of the image beams to a desired exit pupil location.

Abstract: A system is disclosed that display configured to transmit a signal that includes a first light configured as a display image and a second light configured as a reference image. The system also includes a beam splitter, a selectively transmissive mirror and a sensor configured to detect the second light. The beam splitter is configured to receive the signal from the display and reflect the signal to the selectively transmissive mirror. The selectively transmissive mirror is configured to receive the reflected signal, transmit the second light toward a sensor, and reflect the first light, wherein the first light is configured with a first bandwidth, wherein the second light is configured with a second bandwidth. The system further includes a corrector lens configured to receive the first light and transmit the first light to an exit pupil.

Abstract: A metallic grating is formed to include a substrate; a plurality of high aspect ratio trenches disposed in the substrate such that the high aspect ratio trenches are spaced apart from one another by a field surface of the substrate; a metallic superconformal filling formed and disposed in the high aspect ratio trenches; and a grating including a spatial arrangement of the high aspect ratio trenches that are filled with the metallic superconformal filling such that the metallic superconformal filling is void-free, and the high aspect ratio trenches are bottom-up filled with the metallic superconformal filling, wherein a height of the metallic superconformal filling is less than or equal to the height of the high aspect ratio trenches.

Abstract: Electrochromic window systems and components thereof are disclosed, more particularly systems where electrochromic devices are powered and/or controlled using photonic energy. In some instances, a laser is driven by a driver to deliver photonic power and/or control information into an optical fiber. The optical fiber carries the power and control information to a photovoltaic converter and a controller. The photovoltaic converter and controller may be included within an insulated glass unit (IGU). The photovoltaic converter converts the light energy into electrical energy used to power a transition in an optical state of an electrochromic layer or layers within the IGU. The controller may be used to control the power delivered to the electrochromic layer(s), such that a smooth transition occurs. In some embodiments, control information may be transmitted in an upstream manner to communicate information regarding, for example, the state of an electrochromic device.

Abstract: A light projector (2; 102) for an augmented reality headset is disclosed. The light projector includes an image generator (4; 104) configured to provide an image with unpolarised light and a beam splitter (6; 106) configured to receive unpolarised light from the image generator and to split it into a first path and a second path. A first optical arrangement is configured to receive light from the beam splitter in the first path so that light is reflected, focused and directed back towards the beam splitter. A second optical arrangement configured to receive light from the beam splitter in the second path so that light is reflected, focused and directed back towards the beam splitter, wherein the first and second optical arrangements comprise first and second mirrors (12, 22; 112, 122) respectively.

Abstract: An optical element includes a first birefringent medium layer with orientations of directors of first optically anisotropic molecules spatially varying with a first in-plane pitch and a first vertical pitch. The optical element also includes a second birefringent medium layer with orientations of directors of second optically anisotropic molecules spatially varying with a second in-plane pitch and a second vertical pitch. The second birefringent medium layer is optically coupled with the first birefringent medium layer and configured to reduce a diffraction of a light by the first birefringent medium layer. The first in-plane pitch is substantially the same as the second in-plane pitch, and the second vertical pitch is smaller than the first vertical pitch.

Abstract: A method for testing the eyes of a test person with the aid of a vision testing system as well as to a vision testing system, comprising a first measuring device, a second topographic measuring device, a third refractive measuring device and a processing means, a central axial length (LZ) and a peripheral axial length (LP) of an eye of the test person being measured with the aid of said first measuring device, a curvature of the cornea of the eye being measured with the aid of said second measuring device, a refractive property of the eye being measured with the aid of said third measuring device, measurement data of the measurements of the first, second and third measuring device being processed with the aid of said processing means, said processing means outputting the measurement data.

Abstract: An optical device includes a substrate, a plurality of optical elements positioned on the substrate, and one or more switchable cells. A respective optical element of the plurality of optical elements is configured to redirect light having a first polarization and transmit light having a second polarization orthogonal to the first polarization. The plurality of optical elements includes a first optical element located on a first region of the substrate and a second optical element located on a second region of the substrate. A respective switchable cell of the one or more switchable cells includes optically anisotropic molecules. The one or more switchable cells include a first switchable cell located on a first cell location of the substrate between the first region and the second region of the substrate. Also disclosed are a display device including the optical device and a method performed by the optical device.

Abstract: An optical system has a hollow mechanical body having first and second ends. An optical assembly has a plurality of optical components arranged in a stack configuration. Each of the optical components has a set of engagement configurations. For each pair of adjacent optical components in the stack configuration, at least some of the engagement configurations of a first optical component in the pair engage with at least some of the engagement configurations of a second optical component in the pair. Some of the engagement configurations of the optical component at a first end of the stack configuration engage with corresponding engagement configurations of the hollow mechanical body at the first end of the hollow mechanical body to position the other optical components of the stack configuration within the hollow mechanical body. An emissive display device is deployed at the second end of the hollow mechanical body.

Abstract: An illumination assembly includes one or more light sources and an optical assembly. The one or more light sources is configured to provide illumination light. The optical assembly includes a first optical component, a second optical component, and a third optical component. The first optical component, the second optical component, and the third optical component are positioned so that the illumination light is (i) received by the first optical component, (ii) transmitted through the first optical component toward the second optical component, (iii) reflected at the second optical component toward the third optical component, (iv) reflected at the third optical component toward the second optical component, and (v) transmitted through the second optical component. A method of providing illumination using an optical assembly is also disclosed.

Abstract: A spacer device for spectacles maintains the pair of arms of the frame spaced apart from each other with respect to the front of the frame when they are folded in a closing manner. The device includes a spacer member having a thickness defined between a pair of opposing surfaces, the member extending in a main direction, between a pair of opposing faces, which contact with the front mount of the frame and the arm of the pair of arms which is folded last onto the mount, respectively. A channel extends transversely to the main direction and is provided in a position between the faces, the channel delimited by a pair of walls which face each other in a mutually spaced apart relationship and are connected at an end thereof to a base surface of the channel.

Abstract: Disclosed in the present application are a near-eye optical imaging system, a near-eye optical imaging system based near-eye display device, and a near-eye display device based head-mounted display device. The near-eye optical imaging system comprises: a display, a first array of microlenses, which comprises a plurality of first microlenses; a second array of microlenses, which is arranged side by side with the first array of microlenses. The plurality of first microlenses in the first array of microlenses correspond to the plurality of second microlenses in the second array of microlenses respectively to form multiple optical channels. According to the present invention, an object located within a near-eye range is imaged by means of using a display, and two microlens arrays in concatenation.

Abstract: A spectacle lens can inhibit ametropia of the eyes and ensure full visibility. The spectacle lens comprises: first refraction areas and second refraction areas. Each first refraction area has a first refraction force that may be based on a prescription for correcting the ametropia of the eyes. Each second refraction area has a refraction force different from the first refraction force and may function to focus images on the positions except the retina of the eyes, to inhibit the development of the ametropia. Near the central part of the lens, the second refraction areas form a plurality of independent island-shaped areas, and the first refraction areas form the areas beyond the areas of the second refraction areas.

Abstract: An optical element includes an optical surface configured to receive light at a predetermined wavelength in a range from about 400 nm to about 1000 nm. The optical surface is defined by a vertical axis and a horizontal axis defining four Cartesian quadrants sequentially numbered in a counter-clockwise direction. A first longitudinal section of the optical surface is centered on the vertical axis and a second longitudinal section of the optical surface is centered on the horizontal axis. The first and second longitudinal section each extend across opposite edges of the optical surface and have a same substantially uniform retardance for substantially normally incident light. The optical element includes four discrete retarder sections. Each retarder section is disposed on a respective Cartesian quadrant of the optical surface and has a retardance difference from the substantially uniform retardance of the optical surface that is greater than zero.

Abstract: An optical device includes an optical assembly having a first end and a second end, the optical assembly including a first optical component and a second optical component, the first optical component having at least a first optical surface, a second optical surface, and a third optical surface that are non-parallel to one another. The first optical surface is curved and extends between the first end and the second end. A first polarization selective redirector is located between the first optical component and the second optical component, and a first polarization rotating redirector is disposed at the second end.