A method for optical sensing includes providing a mirror comprising a central reflective region surrounded by a peripheral glare-suppressing region. A beam of light from a laser light source is directed to reflect from the central region so as to pass through an output optic along an axis toward a target scene. The light returned from the target scene through the output optic is focused onto an optical sensor, via collection optics having a collection aperture surrounding the mirror.

A method includes providing a coating over a surface of a substrate, a plurality of seed structures being disposed on the surface of the substrate, in which respective heights of the seed structures define local thicknesses of the coating. An optical device includes a substrate, a plurality of seed structures on a surface of the substrate, and a coating on the seed structures and on the surface of the substrate, in which respective heights of the seed structures define local thicknesses of the coating.

The invention relates to image display technology, in particular to a device for rendering an augmented reality image and a system for realizing augmented reality display comprising the device. The device according to one aspect of the invention comprises: an optical waveguide lens; and a first two-dimensional grating array located on a surface of the optical waveguide lens; a second two-dimensional grating array located on the surface of the optical waveguide lens, wherein, positions of the first two-dimensional grating array and the second two-dimensional grating array on the surface of the optical waveguide lens are set so that larger edges of the two are opposite, wherein, the first two-dimensional grating array is configured such that rays incident on the first two-dimensional grating array expands to the entire first two-dimensional grating array on the one hand, and propagates to the second two-dimensional grating array on the other hand, wherein, the second two-dimensional grating array is configured such that rays propagating to the second two-dimensional grating array expands to the entire second two-dimensional grating array on the one hand, and emits from the optical waveguide lens on the other hand, wherein, the first two-dimensional grating array and the second two-dimensional grating array have the same period.

A curable resin composition for a lens, including a coloring agent A having a maximal absorption at a wavelength of 520 to 620 nm, in which a wavelength dispersion WD of a cured product of the composition, which is calculated by the following expression (X), is 2.0×10.sup.−5 or more; a cured product formed of the curable resin composition for a lens; a diffractive optical element; and a multilayer diffractive optical element.

WD=(nC−n(1129))/(1129−656)  Expression (X)

In the expression, nC represents a refractive index at a wavelength of 656 nm and n(1129) represents a refractive index at a wavelength of 1129 nm.

An optical device is formed by hot stamping a demetallized hologram to an optically variable foil or to a coating of optically variable ink. In another embodiment a hologram is hot stamped to a banknote or document printed with a color-shifting ink.

The invention relates to a head-up display device, a vehicle comprising such device and a method of forming an image in a head-up display device. The head-up display device is adapted to project an image on an image surface, such as a windshield. The device comprises a waveguide capable of guiding light carrying the image to be displayed, and an optical correction element. According to the invention, the waveguide is configured to couple light propagating therein towards the optical correction element, and the optical correction element is further configured to perform an optical function for said light and to direct the light towards the image surface through the waveguide.

The present disclosure is directed to projection devices that can project patterned light of different colors. In one implementation, the projection device can include a housing, within which reside multiple components. These components can include light emitting diodes (LEDs), a parabolic mirror reflector, a sinusoidal lenticular diffuser, and multiple spatial filters. The multiple LEDs can be provided in at least two distinct colors. The parabolic mirror reflector can be arranged to collimate light received from the multiple LEDs. The sinusoidal lenticular diffuser can be positioned at an output of the parabolic mirror reflector and arranged to diffuse the collimated light. The spatial filters can be arranged to diffuse the diffused and collimated light received from the sinusoidal lenticular diffuser. An imaging lens can be coupled to the housing and arranged to magnify the diffused light received from the spatial filters and display a cloud-like effect on a first surface.

A two-dimensional waveguide light multiplexer is described herein that can efficiently multiplex and distribute a light signal in two dimensions. An example of a two-dimensional waveguide light multiplexer can include a waveguide, a first diffraction grating, and a second diffraction grating disposed above the first diffraction grating and arranged such that the grating direction of the first diffraction grating is perpendicular to the grating direction of the second diffraction grating. Methods of fabricating a two-dimensional waveguide light multiplexer are also disclosed.

A lighting device and method for manufacturing the lighting device are provided. A substrate contains at least a first surface and a second surface opposing the first surface. Light-sensitive material is provided on the first surface and/or the second surface. The light-sensitive material is exposed to light by applying the light from a light source onto a mask having a periodic pattern of light-attenuating features with interspaced light-permeable features. The light forms a periodic distribution of high intensity regions with interspaced low intensity regions at the first surface and/or the second surface. A periodic structure is formed based on the exposed light-sensitive material and includes light-attenuating features and light-permeable features corresponding to the light-attenuating features and light-permeable features of the mask.

One embodiment provides an apparatus for displaying an image comprising: a first optical substrate comprising at least one waveguide layer configured to propagate light in a first direction, wherein the at least one waveguide layer of the first optical substrate comprises at least one grating lamina configured to extract the light from the first substrate along the first direction; and a second optical substrate comprising at least one waveguide layer configured to propagate the light in a second direction, wherein the at least one waveguide layer of the second optical substrate comprises at least one grating lamina configured to extract light from the second substrate along the second direction; wherein the at least one grating lamina of at least one of the first and second optical substrates comprises an SBG in a passive mode.