186 results about "Output coupler" patented technology

A modular ophthalmology device comprising: a first optical device having a light source and an imaging sensor, a first input coupling having an optical interface connection and a physical interface connection for aligning and securing an input optical module, a first optical output, an optical pathway and an output coupling securing a third optical device.

Disclosed herein are pupil expanders for pupil replication in near-eye display systems. In some examples, a pupil expander includes a waveguide and a variable reflectivity transflective mirror, where display light propagating in the waveguide is transmitted through a plurality of regions of the variable reflectivity transflective mirror to form a plurality of replicas of the pupil along one direction. Two such pupil expanders can be used to replicate the pupil in two directions. In some examples, a pupil expander includes a waveguide, an output coupler formed on or in the waveguide, and two or more transflective mirrors in the waveguide and parallel to a surface the waveguide for improving the pupil replication density and light intensity uniformity of the eyebox.

An electronic device may include a waveguide with an input coupler and an output coupler. The input coupler may receive the image light from imaging optics. The input coupler may be an input coupling prism and the imaging optics may include lens elements. World light may be viewable at an eye box through the output coupler. Biasing, compensation, and / or prescription lenses may overlap the output coupler. The input coupling prism, the lens elements in the imaging optics, and / or one or more of the biasing, compensation, and prescription lenses may be formed from gradient index (GRIN) material. The GRIN material may have a gradient refractive index that varies in one or more gradient directions. Use of GRIN materials may minimize the volume required to form the device without sacrificing optical performance. In addition, the GRIN materials may compensate for dispersion and aberrations in the device.

An eyewear display device expands a field of view by projecting display light at multiple ranges of input angles to a waveguide (600) employing multiple portions of an incoupler (514) or multiple incouplers (514, 414) corresponding to the different angular ranges of display light to guide light to an exit pupil expander (416) configured to receive the display light from the different angular ranges and an outcoupler (608) that are sized to fit within an eyeglasses lens. The display light that is input from the different angular ranges is guided by the incouplers to be overlapped at an exit pupil expander (or, in some embodiments, at multiple exit pupil expanders that are overlaid with each other) to reduce the total ray footprint at the exit pupil expander.

A waveguide display includes: a waveguide that supports a single grating layer; a data modulation light source; a first input coupler for guiding light of a first spectral band from the source into a first waveguide pupil; a second input coupler for guiding light of a second spectral band from the source into a second waveguide pupil; an output coupler including a multiplexed first grating and a second grating; at least one folding grating for guiding the first spectral band along a first path from the first pupil to the output coupler and providing a first beam expansion; at least one folding grating for guiding the second spectral band along a second path from the second pupil to the output coupler and providing a first beam expansion. The first multiplexed grating guides the first spectral band out of the waveguide in a first direction in which the beam expansion is orthogonal to the first beam expansion. The second multiplexed grating guides the second spectral band out of the waveguide in a first direction in which the beam expansion is orthogonal to the first beam expansion.

The invention provides a light transmission waveguide structure and device for binocular AR glasses light path detection. The light transmission waveguide structure comprises a cross-shaped substrate, a multi-channel input coupler and an output coupler; the cross-shaped substrate comprises a first waveguide arm and a second waveguide arm which are arranged in a crossed manner; the multi-channel input coupler comprises a first coupling-in grating and a fourth coupling-in grating which are arranged at the two ends of the first waveguide arm respectively, and a second coupling-in grating and a third coupling-in grating which are arranged at the two ends of the second waveguide arm respectively. The first coupling-in grating and the second coupling-in grating are located at the corresponding positions of a left coupling-out area of the left-eye waveguide. The third coupling-in grating and the fourth coupling-in grating are located at corresponding positions of a right coupling-out region of the right-eye waveguide; the output coupler is arranged in a central crossing area of the cross-shaped substrate, a first output vector of the output coupler is collinear with an input vector of the first coupled light and an input vector of the fourth coupled grating, and a second output vector of the output coupler is collinear with an input vector of the second coupled grating and an input vector of the third coupled grating.

An electronic device may include a display that generates light for an optical system that redirects the light towards an eye box. The optical system may include a waveguide, a non-diffractive input coupler, a cross coupler, and an output coupler. The cross coupler may expand the light in a first direction. The cross coupler may perform an even number of diffractions on the light and may couple the light back into the waveguide at an angle suitable for total internal reflection. The output coupler may expand the light in a second direction while coupling the light out of the waveguide. The cross coupler may include surface relief gratings or holographic gratings embedded within the waveguide or formed in a separate substrate. The optical system may direct the light towards the eye box without chromatic dispersion and while supporting an expanded field of view and optical bandwidth.

An optical display system has an optical waveguide combiner and one or more cameras. The one or more camera(s) is optically coupled to the optical waveguide combiner and have a field of view of at least one real object and at least one virtual object displayable by the optical display system. The one or more camera(s), which may be for example wafer level waveguide camera(s), may be disposed outside the usable field of view of an output coupler. The one or more camera(s) may be self-calibrated electronically using images captured by the cameras of one or more virtual object(s) displayable by the optical display system. AR / VR / MR registration of devices and / or displayed virtual objects with real objects may be implemented using the images captured by the one or more camera(s) of the displayed virtual objects and real world objects. Real object distance and / or spatial location relative to the optical waveguide combiners may be determined or estimated from the captured images.

Systems and methods to improve efficiency of in-coupling electromagnetic waves, such as in a visible light wavelength range, into a waveguide system arrangement are disclosed. The waveguide system includes: a display or an illumination assembly; a waveguide substrate; a polarization volume grating or a spin-dependent bifacial metasurface as in-coupler, which efficiently couples electromagnetic waves, such as in a visible light wavelength range, into the waveguide substrate. An out-coupler can couple the electromagnetic waves, such as in a visible light wavelength range, out of the waveguide substrate.

A display device includes: an image projector including an image forming device and a meta-lens module and configured to output image light formed by the image forming device; and a meta-waveguide configured to transfer the image light output from the image projector, to an observer's field of view, the meta-waveguide including waveguide element configured to totally reflect light inside, an input coupler including a plurality of first nanostructures forming a first phase gradient in a first direction and configured to couple the image light from the image projector to an inside of the waveguide element, and an output coupler including a plurality of second nanostructures forming a second phase gradient in a second direction different from the first direction and configured to output the light coupled to the inside of the waveguide element by the input coupler, to an outside of the waveguide element.

Provided is an optical device having a long lifetime and high reliability. An optical device according to one embodiment comprises at least one Mach-Zehnder (MZ) modulator and a redundant semiconductor optical amplifier (SOA). The redundant SOA is connected to at least one MZ modulator via a 2-input 2-output coupler. The redundant SOA includes two SOAs arranged in parallel, and the two SOAs are arranged in two waveguides connected to the 2-input 2-output coupler, respectively. The redundant SOA is configured to switch the two SOAs to amplify light modulated by the at least one MZ modulator or light obtained before modulation.

The invention relates to a nanosecond fiber laser and method for high-order chaotic pulses. A fiber ring cavity of the laser comprises a wavelength division multiplexer, an erbium-doped fiber, a first polarization controller, an analyzer, a second polarization controller, an output coupler, a dispersion control unit, a fiber isolator and a band-pass filter which are connected in sequence. The method comprises the steps that pumping continuous light is coupled into the laser through the wavelength division multiplexer; pumping continuous light is absorbed by using an erbium-doped optical fiber and is stimulated to radiate a long-wave-band gain pulse; under the combined action of the first polarization controller, the polarization analyzer and the second polarization controller, an equivalent saturable absorption effect is generated by utilizing nonlinear polarization rotation generated when gain pulses are propagated in an optical fiber, and large anomalous dispersion is introduced to realize generation of nanosecond pulses; through the band-pass filter, nanosecond pulses are allowed to be generated, and meanwhile, the nonlinear increasing speed of propagation and accumulation of the nanosecond pulses in the cavity is controlled, so that order-by-order generation of high-order chaotic pulses is realized. According to the invention, reliable output of high-order chaotic pulses can be realized.

The present invention concerns a viewing apparatus comprising:a first optical line comprising:a projecting system adapted to project a light signal on a first area of the retina of an eye of a wearer of the viewing apparatus,a light signal generator generating the light signal to be projected, anda waveguide comprising an input coupler and an exit coupler, the waveguide being adapted to convey light from the input couple to the exit coupler, and optionally a second optical line comprising an optical system adapted to project a light signal of the environment on a second area of the retina of the eye of the wearer, the optical system comprising a part of the waveguide.

Systems and methods presented herein are operable to control operating parameters within a laser system. In some embodiments, a laser system includes a reflector, a gain medium optically coupled to the reflector and operable to emit laser pulses, and a plurality of laser diodes operable to pump the gain medium with laser diode pulses to stimulate laser pulse emission. The laser system also includes a Q-switch device operable with the reflector to resonate laser light through the gain medium, and an output coupler optically coupled to the Q-switch device and operable to output the laser pulses based on a polarization of the laser light. One or more of the plurality of laser diodes is further operable to control operating parameters of the laser system by inserting one or more diode ghost pulses between laser diode pulses that result in the emitted laser pulses.

An optical waveguide system with angle-multiplexing polarization volume gratings and an electronic device are disclosed. The system comprises: a waveguide; an input coupler coupling a combined image light for a combined image into the waveguide; and an output coupler coupling the combined image light out of the waveguide. The combined image light includes a first image light for a first image and a second image light for a second image, which are combined to form the combined image. The first image light and the second image light have different polarizations. The output coupler includes first and second output polarization volume gratings, which are optimized for different polarizations, respectively, wherein the first output polarization volume grating couples the first image light out of the waveguide, and the second output polarization volume grating couples the second image light out of the waveguide.

Provided are a waveguide optical device and a near-eye display apparatus including the same. The waveguide optical device includes a waveguide that propagates light, an input coupler that inputs the light into the waveguide, and an output coupler that outputs the light propagating in the waveguide to the outside, wherein the output coupler includes a plurality of grating regions, which are arranged to be spaced apart from each other.

A laser assembly (10) includes an emitter array (34) and a lens array (36). The emitter array (34) includes a first emitter (18A) that generates a first emitter beam (20A) along a first emitter axis (44A), and a second emitter (18B) that generates a second emitter beam (20B) along a second emitter axis (44B). The first emitter axis (44A) and the second emitter axis (44B) are spaced apart a first emitter separation distance (42a). The lens array (36) includes a first lens (22A) that colliminates the first emitter beam (20A), and a second lens (22B) that colliminates the second emitter beam (20B). The first lens (22A) has a first lens axis (48A) and the second lens (22B) has a second lens axis (48B). The first lens axis (48A) and the second lens axis (48B) are spaced apart a first lens separation distance (46a) that is different from the first emitter separation distance (42a).

An eyepiece device configured to display an image to an eye is provided. The eyepiece device includes a waveguide, an indentation layer, and a projection module. The waveguide has a first surface, a second surface opposite to the first surface, an input coupler located at the second surface, and an output coupler located at the second surface. The indentation layer is disposed on the first surface and has a third surface facing away from the waveguide, wherein the third surface has a plurality of indentations configured to scatter an ambient light incident thereon, so as to reduce interference with a user's perception of the image. The projection module is configured to project an image beam to the input coupler, wherein the image beam travels in the waveguide and is then transmitted to the eye through the output coupler. A waveguide module is also provided.

A composite cavity structure for generating multiple vortices relates to the technical field of vortex lasers. To address the problem in the prior art that vortex lasers can only output a single vortex but not multiple vortices, the present application inserts a lens into the cavity and combines it with a plane reflector mirror engraved with a point defect. By adjusting the position of the plane mirror in the branch and the size of the point defect, high-order vortex beams can be effectively generated and the order can be adjusted. Vortex beams of different orders in multiple branches are output through the same output coupler, thereby generating multiple vortex beams.

An electronic device may include a first biasing lens that transmits world light to an output coupler on a waveguide. The output coupler may transmit the world light while coupling image light out of the waveguide. A second biasing lens may transmit the world light and the image light to an eye-fit region. The colored layer may transmit the world light toward the output coupler. The colored layer may be planar and laminated onto a planar surface of the first offset lens or another lens, may be separated from the first offset lens by an air gap, may be non-parallel with respect to the waveguide, and / or may be curved and separated from the first offset lens and the waveguide by an air gap. When planar, the colored layer may be provided with spacers between the substrates or between the colored layer and the waveguide to maximize parallelism.

The waveguide includes an output coupler implemented in the waveguide as a set of reflective facets arranged along a first direction. Each reflective facet is made by applying a reflective coating to a flat face of one or more substrates. Adjacent reflective facets in the set of reflective facets overlap each other along a first direction. For example, a front portion of one reflective facet of the set of reflective facets overlaps a tail portion of a reflective facet adjacent thereto.

A tunable dual-polarization and dual-frequency laser source (1) adapted to emit an output beam (FS) having a first frequency according to a first linear polarization and a second frequency according to a second linear polarization perpendicular to the first linear polarization, the laser source comprising an optical cavity (C) comprising the following elements arranged between a highly reflective element (M1) and an output coupler (M2): a second electro-optical crystal (EO2) in a second material having a second optical axis with the same direction and the same orientation as the second linear polarization and comprising a second pair of electrodes (E2) adapted to apply within the second electro-optical crystal a second voltage according to a direction of the second linear polarization,the first and second materials being adapted so that there are first and second voltages adapted to independently control a value of the first frequency and a value of the second frequency included in the output beam (FS). [Fig.3],

There is presented a system for outputting a plurality of electromagnetic, EM, radiation beams. The system is configured such that at least one of the EM radiation beams interacts with an atom of plurality of atoms of a neutral atom, quantum computer that is not interacted with by a second of the EM radiation beams; or, at least two of the EM radiation beams are for interacting with a respective different atom of a plurality of atoms neutral atom quantum computer. The plurality of atoms is for defining a respective plurality of qubits in a quantum computation performed by the neutral atom quantum computer. The system comprises one or more integrated-optic EM radiation source assemblies for generating at least first and second EM radiation and outputting said EM radiation along respective spatially separate output paths. The system comprises a plurality of integrated-optic EM modulator apparatus. At least a first of the integrated-optic EM modulator apparatus is for receiving the first EM radiation. At least a second of the integrated-optic EM modulator apparatus is for receiving the second EM radiation. The system comprises a plurality of output couplers. Each output coupler is for receiving, along a plane, EM radiation output from at least one of the integrated-optic modulator apparatus. Each output coupler is further for outputting the received EM radiation as an EM radiation beam in a direction either along the same plane or out of the plane.

This invention provides a self-heterodyne detection system capable of stably and over long periods of time measuring broadband laser linewidths. [Solution] The present invention discloses a self-heterodyne detection system. The system may include a frequency comb light source that generates light, a photodetector that detects the light, an electrical spectrum analyzer connected to the photodetector that analyzes the frequency and wavelength of the light using the detection signal of the photodetector, an interferometer including an input coupler provided between the frequency comb light source and the photodetector to receive the light, a branch waveguide branched by the input coupler, and an output coupler connected to the branch waveguide, and a programmable filter provided in the branch waveguide to select the peak wavelength of the light.

Embodiments of the present disclosure generally relate to augmented reality systems. More specifically, embodiments described herein provide for augmented reality systems, methods of correcting an image projected into a waveguide, and related components. In one or more embodiments, an augmented reality system includes a light engine configured to emit an image and a waveguide including a substrate. The waveguide further includes an input coupler disposed over the substrate and configured to receive the image from the light engine. An output coupler is disposed over the substrate and configured to emit an outcoupled image. A controller is configured to generate corrective data based on one or more characteristics of the outcoupled image and adjust one or more components of the augmented reality system based on the corrective data.

The utility model relates to the technical field of laser equipment, in particular to a laser assembly, a solid-state laser and laser processing equipment, and the laser assembly comprises a birefringent crystal which is used for emitting solid-state laser under the pumping effect, and the solid-state laser comprises two pieces of orthogonal polarized light with different wavelengths; the Q switch is arranged at one end of the birefringent crystal and is used for controlling the output of the solid-state laser; and the dual-wavelength output coupler is arranged at one end, deviating from the birefringent crystal, of the Q switch and is used for coupling and outputting two orthogonal polarized lights in the solid-state laser. Through the mode, the energy loss in the laser pumping cavity can be reduced, so that the laser threshold value is reduced, and the laser output power is improved.

A waveguide (202, 502, 600, 700) for a display (100) comprised of a combination of a flat surface (508, 608, 708) and a curved surface (510, 610, 710) using a plurality of input couplers (204, 504, 604, 704, 912) includes additional input couplers incorporated into the waveguide spaced apart from each other at a precise angle (916, 1216), for example, that matches or corresponds to a grating angle associated with the waveguide (202, 502, 600, 700), this allows light (206, 605, 705, 908, 910) to be injected into the same grating structure at multiple locations while still maintaining k-space closure and thus preventing undesired refraction or distortion. A region in the waveguide (202, 502, 600, 700) that immediately surrounds the input coupler (204, 504, 604, 704, 912) and the output coupler (210, 506, 606, 706, 914) includes a flat surface (508, 608, 708), and a region between the input coupler (204, 504, 604, 704, 912) and the output coupler (210, 506, 606, 706, 914) includes one or more curved surfaces (510, 610, 710).

An angular sensitive time-of-flight position sensor device is provided and includes an array of pixels each comprising: a planar waveguide structure; a collection area with a grating pattern at a specific periodicity to couple incident light into the planar waveguide structure; at least one detector placed outside of the collection area and in a plane different from that of the planar waveguide structure; an output coupler to direct the light from planar waveguide to the at least one detector; a mask to shield the at least one detector from direct illumination; a narrow band light source that illuminates a field-of-view; a first electronics configured to detect the time-of-flight of light retroreflected, scattered, or both incident onto the position sensor and configured to provide distance ranging information; and a second electronics configured to interpret and retain time-of-flight information and configured to communicate with external electronics for system applications.

Systems and methods for generating spectrally compressed photons from broadband emitted photon pulses. The system can include an input coupling having a first coupling ratio and an output coupling having a second coupling ratio. The first coupling ratio is configurable and the second coupling ratio is fixed. A cavity can be connected to the input coupling and the output coupling. A controller in electrical communication with the coupling device can be configured to change the first coupling ratio of the input coupling.

An optical device and a display device including the same are provided. The optical device includes a first backlight configured to output first light of a first wavelength through a first output coupler; a first lens disposed to face the first output coupler and to have a focal length with respect to the first light; a second backlight including a second output coupler, the second backlight configured to output second light of a second wavelength through the second output coupler; a second lens disposed to face the second output coupler and to have different focal lengths with respect to the first light and the second light; a third backlight including a third output coupler, the third backlight configured to output third light of a third wavelength through the third output coupler; and a third lens disposed to face the third output coupler and to have different focal lengths with respect to the first light, the second light, and the third light.