120 results about "Waveguide (optics)" patented technology

The invention discloses an optical waveguide and a preparation method thereof, relates to the technical field of optics, and is used for solving the problems of high processing difficulty, low yield and high cost of the existing array optical waveguide. The optical waveguide comprises a turning waveguide which is provided with a light incident surface, a first surface, a second surface and a plurality of first light splitting surfaces, the first surface and the second surface are arranged in parallel, the first light splitting surfaces are arranged in parallel, the included angle between the first light splitting surfaces and the first surface is smaller than 90 degrees, and the first light splitting surfaces enable light entering the turning waveguide from the light incident surface to be partially reflected; the reflected light is transmitted to the coupling-out waveguide; the coupling-out waveguide and the turning waveguide are spliced, so that light entering the coupling-out waveguide from the turning waveguide is emitted out of the coupling-out waveguide. The first beam splitting surface of the turning waveguide is not perpendicular to the first surface of the turning waveguide, compared with an existing array optical waveguide, the situation that the perpendicularity precision of the beam splitting surface and the surface of the optical waveguide needs to be strictly controlled in the machining process can be avoided, and therefore the machining difficulty can be lowered, the yield can be improved, and cost can be reduced.

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.

Direct-bonded lamination for improved image clarity in optical devices is provided. An example process planarizes and plasma-activates optical surfaces to be laminated together, then forms direct bonds between the two surfaces without an adhesive or adhesive layer. This process provides improved optics with higher image brightness, less light scattering, better resolution, and higher image fidelity. The direct bonds also provide a refractory interface tolerant of much higher temperatures than conventional optical adhesives. The example process can be used to produce many types of improved optical components, such as improved laminated lenses, mirrors, beam splitters, collimators, prism systems, optical conduits, and mirrored waveguides for smartglasses and head-up displays (HUDs), which provide better image quality and elimination of the dark visual lines that are apparent to a human viewer when conventional adhesives are used in conventional lamination.

Embodiments disclosed herein include electronic packages with photonics integrated circuits (PICs). In an embodiment, an electronic package comprises a glass substrate with a first recess and a second recess. In an embodiment, a PIC is in the first recess. In an embodiment, an optics module is in the second recess, and an optical waveguide is embedded in the glass substrate between the first recess and the second recess. In an embodiment, the optical waveguide optically couples the PIC to the optics module.

The invention relates to polymerizable liquid crystal formulations (as a subcategory of liquid crystal material), especially to polymerizable ink formulations for inkjet printing, which are preferably PFAS-free (for enabling the reduction of perfluorocarbons and providing an environment friendly material), and which are comprising one or more polymerizable mesogenic compounds, also known as reactive mesogens (RMs), and one or more organic solvents selected from the group of aromatic ester and aromatic or aliphatic diester solvents, to polymers and polymer films obtained from such formulations, and to the use of the formulations, polymers and polymer films in optical or electrooptical components or devices, especially for digital optics or augmented reality or virtual reality (AR / VR) applications like polarizers, optical compensators, reflective films, diffraction or surface gratings, Bragg polarization gratings (Bragg PG), polarization volume gratings (PVG), polarization volume holograms (PVH), Pancharatnam Berry (PB) gratings, nonmechanical beam steering elements, optical waveguides, optical couplers, optical combiners, polarization beam splitters, partial mirrors, lenses or PB lenses.

The utility model discloses an optical waveguide camera and an optical system, and relates to the technical field of optics. The optical waveguide camera comprises an optical waveguide and an image acquisition device; the optical waveguide comprises a coupling-in grating and a coupling-out grating. The light beam is divided into two light beams by the coupling grating of the optical waveguide, and one light beam enters human eyes through the optical waveguide, so that the optical waveguide camera has an observation function; the other light beam is totally reflected in the optical waveguide and transmitted to the coupling-out grating, the light beam emitted by the coupling-out grating enters the image acquisition device, the image acquisition device converts an optical signal into an electric signal, and the electric signal is converted into image data, so that the recording of an image is realized; namely, a user can observe through the optical waveguide camera, and the optical waveguide camera can record the image; moreover, the second light beam is transmitted in the optical waveguide in a total reflection manner, thereby reducing the energy loss, improving the light efficiency, and improving the experience feeling of a user when the user uses the optical waveguide camera.

An augmented reality system includes a projector and projection optics coupled to the projector. The augmented reality system also includes an eyepiece waveguide including hybrid diffractive structure including: one or more first nanofeatures having first material with a first index of refraction; and one or more second nanofeatures having a second material with a second index of refraction.

A method and apparatus for inscribing a high-temperature stable Bragg grating in an optical waveguide, comprising the steps of: providing the optical waveguide; providing electromagnetic radiation from an ultrashort pulse duration laser, wherein the wavelength of the electromagnetic radiation has a characteristic wavelength in the wavelength range from 150 nanometers (nm) to 2.0 micrometers (μm); providing cylindrical focusing optics; providing a diffractive optical element that when exposed to the focused ultrashort laser pulse, creates an interference pattern on the optical waveguide, wherein the irradiation step comprises irradiating a surface of the diffractive optical element with the focused electromagnetic radiation, the electromagnetic radiation incident on the optical waveguide, from the diffractive optical element, being sufficiently intensive to cause permanent (Type II) change in the index of refraction within multiple Bragg grating planes in the core of the optical waveguide resulting from at least one micropore.

A lithographic apparatus includes a projection system and an inspection system including a radiation system, a photonic integrated circuit system, and a detector system. The projection system projects an image of the patterning device onto a substrate. The radiation system directs radiation toward a target on the substrate to generate scattered radiation from the target. The radiation system includes a radiation source for generating radiation and an optical system for focusing the radiation onto a target. A photonic integrated circuit system includes a waveguide system integrated on a board and a radiation coupler disposed at a waveguide of the waveguide system. The radiation coupler initiates at least a portion of the scattered radiation into the waveguide system. A detector system receives the scattered radiation from the waveguide system and generates a measurement signal based on the scattered radiation.

The invention discloses a dual-wavelength frequency doubling regulation and control method based on a PPLN waveguide, and relates to the technical field of nonlinear optics. The method comprises the following steps: constructing a PPLN waveguide model, and determining a fundamental frequency light mode and a frequency doubling light mode; calculating effective refractive indexes of the fundamental frequency light and the frequency doubling light at respective wavelengths; the polarization period is calculated according to the effective refractive index, any target polarization period is fixed, the target polarization period is configured to correspond to two different working wavelengths at the same time, and therefore dual-wavelength frequency doubling light with a specific wave crest interval is generated at the output end of the waveguide; the wave crest interval is regulated and controlled by selecting different polarization periods; according to the invention, dynamic control of dual-wavelength frequency multiplication output is realized by changing the size of a polarization period; the single waveguide can complete various optical function design ideas, and has certain value for research in related fields such as multi-wavelength lasers and wavelength multiplexing communication.

The utility model discloses a holographic optical waveguide, a sighting telescope and AR equipment, and relates to the technical field of optics. The optical path effect of the reflective sighting telescope is achieved in the mode that the propagation path of light is changed through the holographic waveguide sheet, meanwhile, the problem that the reflective sighting telescope is large in size and weight or poor in target display effect is solved, and the reflective sighting telescope has the advantages of being small in size, light in weight, good in display effect and the like. The size of the coupled image area entering the holographic waveguide sheet is consistent with the size of the coupled image area from the holographic waveguide sheet, so that the holographic waveguide sheet is a pupil-expanding-free holographic waveguide sheet, the coupled image does not need to be copied in the holographic optical waveguide, namely, the size of the coupled image area is consistent with the size of the coupled image area; and meanwhile, the coupling-in area and the coupling-out area are the same in size and are both larger than the preset size, so that the pupil-expansion-free holographic optical waveguide has a large exit pupil effect, the quality of the coupled-out image is high, the light effect loss is small, and the observation experience is good.

Augmented reality glasses (1) for projecting an AR image into an observation field, comprising a glasses frame (2) with a frame (3) and two temples (4) attached laterally to the frame (3), two glasses lenses (5), each mounted in the frame (3), a projection device (6) for generating and displaying images in an observation field intended for insertion, containing a light source tube (61) with at least one light source (611) for emitting at least one light beam and beam-shaping optics (612) designed to collimate and shape the at least one light beam, and a microscanner (62) for variably deflecting the at least one light beam, and a waveguide (7) attached in or on one of the glasses lenses (5),wherein the projection device (6) is mounted on or in an edge region of the frame (3) of the spectacle frame (2) or one of the spectacle lenses (5) and is thus connected to the spectacle frame (2) or the spectacle lens (5) in order to couple the at least one light beam into the waveguide (7).

The invention discloses a laser output optical device, a laser, equipment and a method. The laser output optical device comprises an output optical fiber, an optical waveguide and an optical output head which are connected in sequence, the output optical fiber is used for outputting point ring light beams, a cladding layer, wrapping the second fiber core, of at least partial area, close to the output optical fiber, of the optical waveguide comprises a second conical structure, and the cross section of the second conical structure is annular. The outer diameter of the second conical structure is gradually increased in the light beam transmission direction, and the second conical structure is used for adjusting the light path of the point ring light beam so as to adjust the divergence angle of inner and outer ring light beams. And the optical output head is used for outputting the light beam adjusted by the optical waveguide. The pre-modulated light from the output optical fiber is accurately regulated and controlled, the divergence angle of the output light is adjusted, the light beam quality is improved, and meanwhile the device has the advantages of being simple in structure, low in cost and high in stability.

The augmented reality system includes a projector and projection optics coupled to the projector. The augmented reality system also includes an eyepiece waveguide including a hybrid diffractive structure including one or more first nanofeatures having a first material with a first refractive index and one or more second nanofeatures having a second material with a second refractive index.

The invention discloses a topology protection Hong-Ou-Mandel interferometer based on a pi phase regulation and control grating, and belongs to the technical field of integrated photonics and quantum optics. The interferometer comprises a first waveguide and a second waveguide which are arranged side by side on a silicon dioxide substrate, and each waveguide comprises an input waveguide, a grating waveguide and an output waveguide. The two grating waveguides are provided with periodic notch grooves, and the positions of the notch grooves are symmetrically distributed about a waveguide center connecting line, so that a pi coupling phase difference is introduced between coupling in the two waveguides. The TE-TM coupling strength in the waveguides is enabled to be equal to the TE-TE coupling strength and the TM-TM coupling strength between the waveguides by adjusting the waveguide distance and the notch groove size, and the system enters a topological non-trivialness phase when delta phi is equal to pi, so that a compact topological boundary mode is formed. The structure provides an evolution path protected by topology for two-photon HOM interference, realizes interference visibility close to a theoretical limit, shows strong robustness for manufacturing errors and propagation distance changes, is obviously reduced in device size, and is suitable for high-density integrated quantum photon chips.

Aspects of the disclosure relate to the use of an optical detection scheme enabling multiple imaging sub-systems concurrently optimized for retrieving multiple characterization modalities. The feature described is an offset illumination and detection arrangement for a multimodal imaging probe. The imaging probe comprises multiple waveguides disposed within a torque-transfer coil, distally terminating at longitudinally separated positions. A first waveguide may have focusing optics for focused illumination and / or detection. Any number of other waveguides may be deployed for illumination and / or detection having no focusing optics. The disclosure enables high-fidelity multimodal imaging systems.

An image light guide system for conveying a virtual image that includes a first waveguide having a first refractive index and a second waveguide having a second refractive index. The first waveguide includes diffractive optics arranged to in-couple and out-couple image-bearing light beams of a first wavelength range. The second waveguide includes diffractive optics arranged to in-couple and out-couple image-bearing light beams of at least a second wavelength range. An image light guide system for conveying a virtual image that includes a first waveguide having a first refractive index and a second waveguide having a second refractive index. The first waveguide includes diffractive optics arranged to in-couple and out-couple image-bearing light beams of a first wavelength range. The second waveguide includes diffractive optics arranged to in-couple and out-couple image-bearing light beams of at least a second wavelength range.

The invention discloses a method for improving the uniformity of an optical waveguide imaging picture and an optical waveguide, and relates to the technical field of optics, and the method comprises the steps: obtaining a brightness diagram of an image outputted by the optical waveguide through a test device; obtaining the brightness distribution condition of the image according to the brightness map; determining film coating parameters according to the brightness distribution condition, wherein the film coating parameters comprise a film coating area, a film coating thickness, a film coating type and a film coating layer number; selective coating is carried out on a grating area corresponding to the optical waveguide according to the coating parameters, so that compensation areas with different diffraction efficiencies are formed; and repeating the steps until the brightness uniformity of the optical waveguide reaches a target value. According to the method for improving the uniformity of the imaging picture of the optical waveguide and the optical waveguide, the original structural design of the grating does not need to be changed, accurate compensation is achieved through regionalized selective coating in the post-processing stage, and various AR waveguide products needing the high-uniformity display effect can be effectively adapted.

A display engine includes an illumination module, an LCoS display panel, a waveguide, and projection optics configured to direct source light from the illumination module to the LCoS display panel and direct image light from the LCoS display panel to the waveguide.

The application discloses an optical waveguide and a preparation method thereof, relates to the technical field of optics, and aims to solve the problems of high processing difficulty, low yield and high cost of an existing array optical waveguide. The optical waveguide comprises a turning waveguide which is provided with an incident light surface, a first surface, a second surface and a plurality of first light splitting surfaces, the first surface and the second surface are arranged in parallel, the plurality of first light splitting surfaces are arranged in parallel to each other, the included angle between the first light splitting surface and the first surface is less than 90 DEG, the first light splitting surface causes the light rays entering the turning waveguide from the incident light surface to partially reflect, and the reflected light rays propagate towards a coupling-out waveguide; the coupling-out waveguide is spliced with the turning waveguide and is used for making the light rays entering the coupling-out waveguide from the turning waveguide exit the coupling-out waveguide. The first light splitting surface of the turning waveguide is not arranged perpendicularly to the first surface, compared with the existing array optical waveguide, the perpendicularity precision of the light splitting surface to the surface of the optical waveguide in the processing can be avoided, therefore, the processing difficulty can be reduced, the yield can be improved, and the cost can be reduced.

The present disclosure describes near-eye display systems including an array of projectors and a one-dimensional exit pupil expander. The array of projectors can be arranged along a first dimension and can output image light towards an input coupler within a waveguide that provides one-dimensional exit pupil expansion. In some implementations, arrays of monochromatic projectors are implemented and arranged in offset columns. The input coupler in-couples the image light from the array of projectors into a TIR path within the waveguide. Different optical elements, including diffractive and reflective optics, may be implemented as the input coupler. The image light travels within the waveguide until it interacts with an output coupler. Upon interaction with the output coupler, the image light is expanded in a second dimension transverse to the first dimension and is coupled out of the waveguide.

A display apparatus is provided. The display apparatus includes a waveguide and a collimating optics that are positioned at a first side of the display apparatus and coupled to each other. The display apparatus includes an image source and a collimating optics module arranged at a second side of the display apparatus. The second side of the display apparatus is different from the first side of the display apparatus. The display apparatus includes a coherent fiber bundle (CFB) that is positioned between and coupled to (i) the waveguide and the collimating optics and (ii) the image source and the collimating optics module.

The application provides a nonlinear optical crystal, a preparation method and application thereof, and has the chemical formula Y(C6H5SO3)3.9H2O, wherein the compound has good nonlinear optical performance, a band gap of 4.35eV, an ultraviolet cutoff edge near 285nm, a frequency doubling response of about 0.8 times of KH2PO4 (KDP), a shortest phase matching wave band near 300nm, good crystal growth habit, and simple preparation process and low preparation cost; the nonlinear optical crystal can be used for frequency conversion of laser output, the shortest phase matching wavelength is less than 300nm, and can produce 2 times frequency doubling harmonic output on a laser beam with a wavelength of 1064nm; meanwhile, the crystal can be used for a harmonic generator from an infrared region to an ultraviolet region, an optical parametric and amplifier device, an optical waveguide device and a nonlinear optical device, can meet a larger frequency doubling coefficient, has larger birefringence, and has wide application in the field of nonlinear optics.

An augmented reality device includes a projector, projector optics optically coupled to the projector, and an eyepiece optically coupled to the projector optics. The eyepiece includes an eyepiece waveguide characterized by lateral dimensions and an optical path length difference as a function of one or more of the lateral dimensions.

A display apparatus having a compact projector is provided. The head-mounted device may have a nose bridge joining the first waveguide and the second waveguide. The first waveguide and the second waveguide may overlap with respective eye-fit regions. The device may include a display projector located in the nose bridge. The display projector may include a display panel that emits image light. The nose bridge may include optics that direct the image light to the first waveguide and the second waveguide. Optical couplers on the first and second waveguides may couple the image light into the first and second waveguides, and may couple the image light out of the first and second waveguides and toward the eye-fit regions. The optics in the nasal bridge may include scanning mirrors, additional waveguides, and / or binocular combined free form prisms.

The invention relates to polymerizable liquid crystal compositions (as a subcategory of liquid crystal materials) comprising an alignment additive, which are preferably PFAS-free (for enabling the reduction of perfluorocarbons and providing an environment friendly material), to formulations, polymers and polymer films obtained from such compositions, and to the use of the compositions, formulations, polymers and polymer films in optical or electrooptical components or devices, especially for digital optics or augmented reality or virtual reality (AR / VR) applications like polarizers, optical compensators, reflective films, diffraction or surface gratings, Bragg polarization gratings (Bragg PG), polarization volume gratings (PVG), polarization volume holograms (PVH), Pancharatnam Berry (PB) gratings, nonmechanical beam steering elements, optical waveguides, optical couplers, optical combiners, polarization beam splitters, partial mirrors, lenses or PB lenses.

A diffractive optical element comprising at least one achromatic half-wave plate and at least one chromatic half-wave plate, each half-wave plate comprising at least two layers of a polymerized chiral liquid crystal (LC) material on a substrate, wherein at least one of the substrates has a periodic surface grating, a method for its preparation. Also, its use in optical or electrooptical components or devices, especially for digital optics or augmented reality or virtual reality (AR / VR) applications like non-mechanical beam steering elements, optical waveguides, optical couplers, optical combiners, optical deflectors, polarization beam splitters, partial mirrors or lenses.

The invention discloses a micro-ring resonator, relates to the technical field of optics, and aims to solve the problem that an existing micro-ring resonator cannot meet the requirements of wide free spectral range, small size and low power consumption at the same time. Comprising a micro-ring resonant cavity and a waveguide. The waveguide and the micro-ring resonant cavity are provided with a coupling area, and the micro-ring resonant cavity except the coupling area or the inner wall side of the micro-ring resonant cavity except the coupling area is provided with a reflection structure. The reflection structure is used for reflecting a part of spectrum transmitted in the micro-ring resonant cavity along the circumferential direction of the micro-ring resonant cavity; the micro-ring resonant cavity has a clockwise resonant mode and an anticlockwise resonant mode. The micro-ring resonator provided by the invention has a wide free spectral range, and is low in power consumption and small in size.

The invention discloses a Co-Package Optics (Co-Package Optics) scheme based on a glass through hole adapter plate. The Co-Package Optics scheme comprises the glass through hole adapter plate and a laser direct writing optical waveguide. The invention further discloses an implementation method based on the laser direct writing optical waveguide. According to the CPO optical engine, the laser direct writing optical waveguide is arranged on the glass substrate and is matched with the adapter plate based on the TGV glass through hole, so that the reliability of the whole CPO optical engine is improved, the assembly production time of a user for optical path coupling is saved, and the overall product cost is reduced.

The application discloses a kind of multi-parameter quantum sensing optical quantum chip and preparation method and application thereof, it is related to quantum information technology, optoelectronic technology and nonlinear optics field.The optical quantum chip provided by the application includes substrate, and optical path is arranged on the substrate;The optical path includes the classical laser processing unit connected and arranged, nonlinear unit, sensing unit and quantum state output unit;Nonlinear unit includes the first entangled photon pair generation waveguide and the second entangled photon pair generation waveguide arranged in parallel;Sensing unit includes reference arm waveguide and sensing arm waveguide;Quantum state output unit includes the third beam splitter in communication with reference arm and sensing arm.The optical quantum chip provided by the application can significantly improve the sensitivity, accuracy, spatial resolution, expansibility, integration and stability of optical quantum sensing.The application also provides the preparation method and application of the above optical quantum sensor.