Configurable optical device comprising an optical element (1) or various optical elements (1) arranged in series, wherein each element (1) comprises an active region (2) with an entry surface (21) and an exit surface (22) for light beams, and a perimeter (3); each element (1) comprising at least one first transparent electrode (4) and at least one transparent counter electrode (5) the corresponding electrical connections being located in the perimeter (3); the device being configured such that, upon application of a potential difference between electrodes (4, 5) of each element (1), an electric field that alters the degree of commutation in different regions of the active zone (2) of each element (1) is generated, thus creating a varying optical path profile in each element (1), which allows an incident light beam to be focused in different ways, depending on the electric field applied to each electrode.

The invention relates to a security element with manipulation detection, in particular a security label or a transferable element, having the following layers: a) a first layer which is an embossed support substrate or a support substrate (1) with a coating layer (6) that has an optically active structure (7) or a first liquid crystal layer, b) a second layer which is a liquid crystal layer (3), c) a light-absorbing layer (4), and d) an adhesive layer (5), wherein the adhesion between the layers a. and b. is lower than the adhesion between the layers b., c., and d., and the security element has a color shift effect.

A near eye optical display includes a waveguide comprising a first surface and a second surface, an input coupler, a fold grating, and an output grating. The input coupler is configured to receive collimated light from a display source and to cause the light to travel within the waveguide via total internal reflection between the first surface and the second surface to the fold grating; the fold grating is configured to provide pupil expansion in a first direction and to direct the light to the output grating via total internal reflection between the first surface and the second surface; and the output grating is configured to provide pupil expansion in a second direction different than the first direction and to cause the light to exit the waveguide from the first surface or the second surface.

A sub-pixel unit for a reflective display includes a color filter including a tunable high contrast grating. The tunable high contrast grating reflects light within a first range of wavelengths, and the sub-pixel unit can exist in a first state and a second state, the first state reflecting at least one of (i) light within a different range of wavelengths, and (ii) light of a different intensity level, than the second state.

Methods and devices for manipulating optical signals. In one example, a LCOS (liquid crystal on silicon) device includes a surface bearing an anti-reflection structure. The anti-reflection structure includes i) a physical surface having a topography with features having lateral dimensions of less than 2000 nm and having an average refraction index which decreases with distance away from the surface; and ii) a configuration of the topography, averaged over lateral dimensions of greater than 2000 nm, varies with lateral position on the surface.

Provided is a virtual image display device including an imaging light emitting device, a light-guiding member configured to guide imaging light emitted from the imaging light emitting device, and an emission-side diffraction element provided at a light-emitting portion of the light-guiding member and configured to emit the imaging light by diffraction. In the emission-side diffraction element, a light amount difference between a first component light and a second component light of the imaging light, the first component light being emitted as a central image at a first angle σ of 0° and the second component light being emitted as a peripheral image at a second angle σ of ±θ (θ>0°), is equal to or less than 20%.

There is provided a diffractive waveguide device comprising: a light source, at least one light detector, an SBG device comprising a multiplicity of separately switchable SBG elements sandwiched between transparent substrate to which transparent electrodes have been applied. The substrates function as a light guide. Each SBG element encodes image information to be projected on an image surface. Each SBG element when in a diffracting state diffracts light out of the light guide to form an image region on an image surface. The light detector detects light scattered from an object disposed in proximity to the image surface and illuminated by said image region.

A contact image sensor having an illumination source; a first SBG array device; a transmission grating; a second SBG array device; a waveguiding layer including a multiplicity of waveguide cores separated by cladding material; an upper clad layer; and a platen. The sensor further includes: an input element for coupling light from the illumination source into the first SBG array; a coupling element for coupling light out of the cores into output optical paths coupled to a detector having at least one photosensitive element.

A method for displaying virtual content to a user, the method includes determining an accommodation of the user's eyes. The method also includes delivering, through a first waveguide of a stack of waveguides, light rays having a first wavefront curvature based at least in part on the determined accommodation, wherein the first wavefront curvature corresponds to a focal distance of the determined accommodation. The method further includes delivering, through a second waveguide of the stack of waveguides, light rays having a second wavefront curvature, the second wavefront curvature associated with a predetermined margin of the focal distance of the determined accommodation.

Provided is an optical device manufacturing method including forming a reflection layer on a substrate, forming a dielectric layer on the reflection layer, and inserting a phase change material layer into the dielectric layer, wherein the inserting of the phase change material layer includes adjusting a position of the phase change material layer to be inserted into the dielectric layer according to a wavelength of incident light incident to the dielectric layer.