A backlight includes a substrate, a plurality of light sources, a reflective layer, a light guide plate, a pattern of light extractors, a plurality of patterned reflectors, and a diffusive layer. The plurality of light sources are proximate the substrate. The reflective layer is on the substrate. The light guide plate is proximate the plurality of light sources. The pattern of light extractors is on the light guide plate. The plurality of patterned reflectors are on the light guide plate. Each patterned reflector is aligned with a corresponding light source. The diffusive layer is on the light guide plate.

Described herein is an improved optical display system for a head or helmet mounted display (HMD). The optical display system comprises an intermediate reflective element that comprises an array of microstructures. Separate image generators are provided which generate images which are projected onto a user's left and right eyes and by use of the intermediate reflective element, the image generator located on the left side of the HMD generates an image for the user's left eye and the image generator located on the right side of the HMD generates an image for the user's right eye. As described below, this improved optical display system may, in various examples, be coupled with a vision enhancement system.

An optical combiner including a waveguide prism configured to convey display light, from a display panel, from a proximal end of the waveguide prism to a distal end of the waveguide prism via total internal reflection. The optical combiner also includes an outcoupling interface positioned at the distal end of the waveguide prism on a surface of the waveguide prism that faces a user's eye. The outcoupling interface includes a plurality of polarization-dependent layers including a refractive beam-splitting convex lens to fold the light path of the display light and reduce the dimensions of a near-eye optical system implementing the optical combiner.

Methods, apparatuses, and methods of manufacture are described that provide one or more fixed blades mounted to a frame or substrate, one or more movable blades mounted to each structure to be moved, and flexures on which the structures are suspended which reduces moment of inertia during use.

A security element for manufacturing value documents has a structure including first and second motifs which change their appearance when the security element is tilted over a tilting angle range. The structure has first micro-elements, which are arranged with a first pattern and a first motif, and second micro-elements, which are arranged with a second pattern and a second motif. The first and second patterns are nested within each other on an areal region of the security element and have different visual appearances according to the tilting of the securing element.

The present invention relates to an optically variable security element for securing valuable articles, having a substrate having opposing first and second main surfaces and, arranged on the first main surface, an optically variable pattern that comprises an embossing pattern and a coating. The coating comprises at least one imprinted line grid and a background layer that contrasts with the line grid. The embossing pattern comprises a two-dimensional grid of elevated and/or depressed embossing elements. Both are combined in such a way that substantially on every embossing element lies at least one line segment of a line in the line grid, and at least one of the parameters position of the line segment on the embossing element, orientation of the line segment on the embossing element and form of the line segment varies location dependently across the dimension of the optically variable pattern. Due to the line grid, a movement effect, especially a pump or rotation effect, is created when the security element is tilted.

A focusing device comprises a base unit and a mirror unit which is translatable relative to the base unit parallel to an optical axis of the focusing device. The mirror unit is configured to receive incident light along the optical axis in a first direction and to reflect the incident light parallel with the optical axis in said first direction. The mirror unit comprises at least four mirrors, at least one of the mirrors being curved.

Disclosed herein is augmented reality (AR) eyewear with at least one array of individually-adjustable optical elements whose levels of light transmission and/or reflectivity are selectively and individually adjusted by application of electrical current, or by exposure to an electromagnetic field, via transparent (or translucent) electroconductive pathways. Optical elements in this array collectively comprise a section of a Fresnel Reflector which has been selected (e.g. extracted or “cut out”) from the right side or the left side of a Fresnel Reflector.

A micromirror arrangement having at least a first micromirror, a second micromirror, and a third micromirror. The second micromirror has a first component and a second component. The first component is arranged, in particular in a plan view, in a manner overlapping a first mirror surface of the first micromirror. The second component is arranged, in particular in the plan view, in a manner overlapping a third mirror surface of the third micromirror.

A spatial image display touch device includes an imaging element, a display, an optical film and a sensor unit. The imaging element and the display are retained in a housing and inclined to each other. The display generates an image light passing through the imaging element to form a spatial image. The optical film, composed of a plurality of micro-grids arranged in a matrix, is attached on the display. The sensor unit is mounted in the housing to detect an object appearing at the position wherein the spatial image is displayed. By arranging the optical film in front of the display, only the spatial image is visible and the problem of ghost images is avoided.