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Optic patents

      

This page is updated frequently with new Optic-related patent applications.

SALE: 410+ Optic-related patent PDFs



 Optical cable with electromagnetic field shield layer patent thumbnailnew patent Optical cable with electromagnetic field shield layer
A shielded combined optical communication and conductor cable is provided. The cable includes a cable body having an inner surface defining a channel within the cable body.
Corning Optical Communications Llc


 Mainframe computer with supporting rack patent thumbnailnew patent Mainframe computer with supporting rack
A mainframe computer with a supporting rack includes: a rack chassis and a supporting rack. The rack chassis has a first rack, and the first rack has a plurality of first positioning members.
Cooler Master Technology Inc.


 Protecting a vacuum environment from leakage patent thumbnailnew patent Protecting a vacuum environment from leakage
Methods, devices, and systems for protecting a vacuum environment from leakage are provided. The devices include an optical component for gas-tight closure of the vacuum environment, a retention device configured to retain the optical component and including a cooling region separated from the vacuum environment in a gas-tight manner and configured to receive a cooling medium to cool the optical component, a first part-region of the optical component being arranged in the cooling region, and a reduced-pressure region configured to have a reduced pressure and separated in a gas-tight manner from the vacuum environment and from the cooling region, a second part-region of the optical component being arranged in the reduced-pressure region, and a detector configured to detect a leakage in the optical component when the cooling medium flows from the cooling region into at least one of the reduced-pressure region or the vacuum environment..
Trumpf Laser- Und Systemtechnik Gmbh


 Communications interface patent thumbnailnew patent Communications interface
A connection unit comprises a plurality of termination points for interconnection of telecommunications lines, for two or more different communications modes, for example fiber optic, coaxial, twisted pair, ethernet etc. A connection block is arranged such that direct connection may be made between pairs of lines of a given mode.
British Telecommunications Public Limited Company


 Active shutter head mounted display patent thumbnailnew patent Active shutter head mounted display
A head mounted display (hmd) device may include a housing coupled to a frame, and a display disposed in the housing. A first lens and a first active shutter may be disposed along a first optical axis in the housing, and a second lens and a second active shutter may be disposed along a second optical axis in the housing.
Google Inc.


 Autostereoscopic 3d display device using holographic optical elements patent thumbnailnew patent Autostereoscopic 3d display device using holographic optical elements
An autostereoscopic 3d display device is disclosed. The device includes a first light source and a second light source configured to alternately generate light and a light guide panel arranged to guide the light from the first light source in a first direction as a first light beam and the light from the second light source in a second direction as a second light beam.
Covestro Deutschland Ag


 Aligning lamination  optical grating and display panel and device patent thumbnailnew patent Aligning lamination optical grating and display panel and device
The present invention discloses an aligning lamination method of an optical grating and a display panel and a device. The method comprises: drawing a white line on a black picture and showing on the display panel, and a tilt angle of the white line is in accordance with a tilt angle designed for the optical grating; coating glue on the display panel, and the optical grating is located on the display panel; locating an image collecting apparatus in front of the display panel to collect images; adjusting a location angle of the optical grating and solidifying the glue to laminate the optical grating and the display panel as that the entire line is brightest is observed with the image collecting apparatus.
Shenzhen China Star Optoelectronics Technology Co.


 Nanophotonic hyperspectral/lightfield superpixel imager patent thumbnailnew patent Nanophotonic hyperspectral/lightfield superpixel imager
Systems and methods are described that relate to an optical system including an image sensor optically-coupled to at least one nanophotonic element. The image sensor may include a plurality of superpixels.
Verily Life Sciences Llc


 Camera module patent thumbnailnew patent Camera module
A camera module includes a lens barrel including at least one lens group; a moving frame that includes the lens barrel and moves in an optical axis direction and in a first direction and a second direction that are perpendicular to the optical axis direction; a fixed frame that movably supports the moving frame and provides the moving frame with a driving force in the optical axis direction, a driving force in the first direction, and a driving force in the second direction; and a base that fixes the fixed frame and includes an image sensor that is spaced apart from the at least one lens group in the optical axis direction.. .
Samsung Electronics Co., Ltd.


 Imaging apparatus, control method thereof, program and storage medium patent thumbnailnew patent Imaging apparatus, control method thereof, program and storage medium
To provide an imaging apparatus capable of maintaining good performance even if it is used in a high-humidity environment, the imaging apparatus is equipped with a detecting unit for detecting an environment of a photographing optical system, and a control unit for controlling an actuator of driving the photographing optical system to perform a first operation and a second operation of performing maintenance of the photographing optical system, and driving the actuator in the second operation at a timing according to the environment.. .
Canon Kabushiki Kaisha


new patent

Optical system and imaging system incorporating the same

An optical system including a plurality of wide angle lenses, each having a peripheral area with a decreased magnification per unit angle of view and an inside area ranging from an optical axis to an inside edge of the peripheral area. The inside area includes a first area ranging from the optical axis toward the peripheral area, the first area having a constant magnification per unit angle of view and a second area ranging from an outside edge of the first area to the inside edge of the peripheral area.

new patent

Drawing apparatus, drawing method, and drawing program

A drawing apparatus includes a first control unit and a second control unit. The first control unit receives a plurality of image data including a subject from a plurality of cameras, and outputs data obtained from coordinate conversion performed by referring to lut data.
Socionext Inc.

new patent

Imaging apparatus and control imaging apparatus

According to the present invention, an imaging apparatus includes: an imaging unit which acquires image data by an imaging lens forming an image of an object on an imaging surface on which imaging pixels are arrayed; a designated position acquiring unit which acquires a designated position on the image data; a sighting device which allows a user to visually recognize an optical axial direction of the imaging lens; and a controller which, on the image data, adjusts a position of an object on an imaging optical axis of the imaging lens, based on the designated position.. .
Olympus Corporation

new patent

Image pickup apparatus

The image pickup apparatus includes: a first imaging sensor in which pixels including photoelectric conversion units are arranged two-dimensionally; a second imaging sensor in which pixels including photoelectric conversion units are arranged two-dimensionally, each pixel including one micro lens, and a first and a second photoelectric conversion units; a light beam splitting unit for splitting a flux of light entering an optical system into fluxes of light entering the first and the second imaging sensors separately; a first image processing unit for processing signals from the first imaging sensor, the first image processing unit generating a still image based on signals from the first imaging sensor; and a second image processing unit for processing signals from the second imaging sensor, the second image processing unit generating signals usable for focal point detection of a phase difference method and generating a moving image based on signals from the second imaging sensor.. .
Canon Kabushiki Kaisha

new patent

Auto-focus in low-profile folded optics multi-camera system

Embodiments of imaging systems and methods of autofocusing are disclosed, for example, using a folded optics configuration. One system includes at least one camera configured to capture a target image scene, including an image sensor comprising an array of sensor elements, a primary light folding surface configured to direct a portion of received light in a first direction, and an optical element having a secondary light folding surface directing light in a second direction.
Qualcomm Incorporated

new patent

Raw camera peripheral with handheld mobile unit for processing raw image data

A handheld imaging device is described to provide high quality raw image data to a smartphone, or similar handheld imaging device. The imaging device can have a larger dimension, particularly with regard to the thickness of the device, thus overcoming some of the physical limitations to providing high quality optics and image sensing within the thin form factor of a modern smartphone.
2p & M Holdings, Llc

new patent

Raw camera peripheral with handheld mobile unit processing raw image data

A handheld imaging device is described to provide high quality raw image data to a smartphone, or similar handheld imaging device. The imaging device can have a larger dimension, particularly with regard to the thickness of the device, thus overcoming some of the physical limitations to providing high quality optics and image sensing within the thin form factor of a modern smartphone.
2p & M Holdings, Llc

new patent

High speed autofocus system

A method and apparatus for optimizing inspection high-speed optical inspection of parts using intelligent image analysis to determine optimal focus using high numerical aperture (na) optics, achieve a superior signal-to-noise ratio, resolution, and inspection speed performance with very limited depth of field lenses.. .
Rudolph Technologies, Inc.

new patent

Wideband ambient light rejection

Optical apparatus includes an image sensor and objective optics, which are configured to collect and focus optical radiation over a range of wavelengths along a common optical axis toward a plane of the image sensor. A dispersive element is positioned to spread the optical radiation collected by the objective optics so that different wavelengths in the range are focused along different, respective optical axes toward the plane..
Apple Inc.

new patent

Imaging device and interchangeable lens arranged to have a reduced amount of magnetic field reaching an image pickup element

A first magnetic body is arranged between a coil and an image pickup element, and has an opening through which light directed from an imaging optical system toward the image pickup element passes. A second magnetic body is arranged at a position on the coil side with respect to the first magnetic body in an optical axis direction of the imaging optical system.
Canon Kabushiki Kaisha

new patent

Lens mounting mechanism, lens mounting method, and image pickup device

An insertion part 355 inserted into an insertion hole 255 of a front case 25 in an insertion direction which is a direction of an optical axis and a regulation part 351 for regulating the insertion are formed in a lens holder 35 for holding an image pickup lens 31. Engaging parts 252 and 352 are provided on a surface opposed to a case of the regulation part 351 and on a surface opposed to the regulation part of the front case 25.
Sony Corporation

new patent

Imaging systems with integrated light shield structures

An imaging system may include an image sensor having an array of pixels. The image sensor may include an array of microlenses formed over a substrate and an array of color filter elements interposed between the microlenses and the substrate.
Semiconductor Components Industries, Llc

new patent

User feedback for real-time checking and improving quality of scanned image

A smartphone may be freely moved in three dimensions as it captures a stream of images of an object. Multiple image frames may be captured in different orientations and distances from the object and combined into a composite image representing an image of the object.
Dacuda Ag

new patent

Image reading apparatus, image reading method, and non-transitory computer readable medium

An image is read from a recording medium via first and second optical imaging systems disposed such that respective reading regions partially overlap each other in a principal scanning direction on a reading surface. A sum of distances over which first and second images captured by the first and second optical imaging systems, respectively, are displaced in the principal scanning direction with respect to a reference point included in a region in which the reading regions overlap each other is calculated.
Fuji Xerox Co., Ltd.

new patent

Raw camera peripheral for handheld mobile unit

A handheld imaging device is described to provide high quality raw image data to a smartphone, or similar handheld imaging device. The imaging device can have a larger dimension, particularly with regard to the thickness of the device, thus overcoming some of the physical limitations to providing high quality optics and image sensing within the thin form factor of a modern smartphone.
2p & M Holdings, Llc

new patent

Authentication system, authentication method, server device, and client device

A server device of an authentication system includes: an optical signal communication unit that causes optical signal transmitters to repeatedly transmit modulated optical signals, by notifying, of pieces of partial authentication information stored in an authentication information management unit, the optical signal transmitters respectively related to the pieces of partial authentication information; and an authentication processing unit that authenticates, when authentication is requested from a client device, the client device, based on integrated authentication information notified with the request, and integrated authentication information before being segmented into the respective pieces of partial authentication information notified by the optical signal communication unit.. .
Minebea Co., Ltd.

new patent

Communication method, optical module, and network device

A communication method and an optical module are disclosed. In various embodiments the method includes generating, by an optical module, a first packet according to a service packet that passes through the optical module, wherein a source address of the first packet is the same as a source address of the service packet, and wherein a destination address of the first packet is the same as a destination address of the service packet; sending, the first packet in a transmission direction of the service packet; and receiving, a second packet sent by the network device, wherein the second packet indicates that the first transmission path from the optical module to the network device exists, and wherein the second packet instructs the optical module to communicate with a network management system by using the network device and the first transmission path..
Huawei Technologies Co., Ltd.

new patent

Digital service path viewer

A device may obtain first information related to a digital service that may identify a digital path. The digital path may include digital nodes and optical links, of an optical network, to provide the digital service.
Infinera Corporation

new patent

Apparatus and methods for quantum key distribution

Systems, apparatus, and methods using an integrated photonic chip capable of operating at rates higher than a gigahertz for quantum key distribution are disclosed. The system includes two identical transmitter chips and one receiver chip.

new patent

Optical network controller and optical network control method

It is difficult to improve the wavelength-band utilization rate of an optical network as a whole while operating the optical network stably; and therefore, an optical network controller according to an exemplary aspect of the present invention includes optical wavelength region setting means for setting a wavelength region in an optical transmission line between a plurality of optical nodes composing an optical network using wavelength division multiplexing system dividing the wavelength region into consecutive regions of a first wavelength region and a second wavelength region; optical path setting means for setting a first optical path in the first wavelength region and a second optical path in the second wavelength region, the second optical path differing from the first optical path in a route; and control unit for instructing the plurality of optical nodes on a central wavelength and a usable band of signal light for the optical node to transmit based on a setting by the optical path setting means.. .
Nec Corporation

new patent

System and passive optical network communication

In one embodiment, a method for passive optical network (pon) communication includes broadcasting, by an optical line terminal (olt), a first message including a first start time of a first quiet window and a first allocation identification number (alloc-id), where the first alloc-id indicates a first supported upstream line rate associated with the first quiet window. The method also includes receiving, by the olt from a first optical network unit (onu) during the first quiet window, a first serial number response, wherein a first transmitting upstream line rate of the first onu is equal to the first supported upstream line rate..
Futurewei Technologies, Inc.

new patent

Methods and systems for delivery of multiple passive optical network services

A system for delivering multiple passive optical network services is disclosed. The system includes a first optical transmission service comprising a common wavelength pair routed from a source to each of a plurality of subscribers.
Commscope Technologies Llc

new patent

Optical transmission device that transmits wavelength division multiplexed optical signal

An optical transmission device includes: a monitor configured to monitor a power of an input optical signal and detect a spectrum of the input optical signal; a detector configured to detect a wavelength division multiplexed optical signal that includes a plurality of carriers continuously allocated at a specified frequency spacing based on the spectrum of the input optical signal; a generator configured to generate adjustment information that specifies an attenuation amount in a frequency range in which the wavelength division multiplexed optical signal is allocated; and a power adjustment device configured to adjust powers of respective carriers multiplexed in the wavelength division multiplexed optical signal according to the adjustment information generated by the generator.. .
Fujitsu Limited

new patent

Apparatus and distributed compensation of narrow optical filtering effects in an optical network

The present disclosure describes a reconfigurable optical add-drop multiplexer including a wavelength selective switch configured to filter wavelengths of an optical signal; and an optical equalizer, coupled to the wavelength selective switch, configured to equalize the optical signal to mitigate optical filtering effects caused by the wavelength selective switch.. .
At&t Intellectual Property I, L.p.

new patent

Data transmission method

Described are, among other things, a method and a receiver for receiving a management data signal in an optical transmission system where a traffic data signal is transmitted as a nrz modulated signal. The traffic data signal has a management data signal superimposed thereon as a pulse width modulation of the symbols of the nrz modulated signal.
Transmode Systems Ab

new patent

Optical reception circuit

An optical reception circuit includes a first photodetector, a first transimpedance amplifier, a level shift circuit, a second photodetector, a second transimpedance amplifier, a peak hold circuit, and a comparator. The first transimpedance amplifier converts a first light current from the first photodetector to a first voltage.
Panasonic Intellectual Property Management Co., Lt

new patent

Decoding a combined amplitude modulated and frequency modulated signal

The present disclosure relates to a method for decoding a combined am/fm encoded signal, comprising the steps of: combining said encoded optical signal with light from a local oscillator configured with a local oscillator frequency; converting the combined local oscillator and encoded optical signal into one or more electrical signals by means of at least one opto-electrical converter having a predefined frequency bandwidth, thereby providing an amplified and encoded electrical signal having one or more encoded signal current(s), where one type of states have a higher oscillation frequency than other type of states; rectifying the encoded signal current(s), thereby obtaining an encoded power spectrum, wherein said power spectrum has different states, such as “0”-states and “1”-states, with different power levels such that they can be discriminated, said local oscillator frequency is defined by a positive local oscillator frequency-offset from the frequency of one of the states in said encoded optical signal, and said local oscillator frequency-offset is selected to be dependent on said frequency bandwidth.. .
Danmarks Tekniske Universitet

new patent

Method and system for optoelectronic receivers utilizing waveguide heterojunction phototransistors integrated in a cmos soi wafer

A method and system for optoelectronic receivers utilizing waveguide heterojunction phototransistors (hpts) integrated in a wafer are disclosed and may include receiving optical signals via optical fibers operably coupled to a top surface of the chip. Electrical signals may be generated utilizing hpts that detect the optical signals.
Luxtera, Inc.

new patent

Apparatus and efficient two-way optical communication where transmitter may interfere with receiver

A two-way optical communication apparatus includes a transmit element, a receive element and a transceive processor. The transmit and receive elements are coupled to a light pipe, and configured to transmit a first optical signal and receive a second optical signal, respectively.
Google Inc.

new patent

Physical layer management configured active optical module with native and non-native network element support

Systems for a plm configured active optical module (aom) with native and non-native-network element support are provided. A system includes a non-native network element having a first port with a first inventory interface; a first pluggable aom installed in the first port and coupled to the first inventory interface, where in response to a request to read a standard table entry the first pluggable aom provides plm information to the non-native network element in a format complying with a msa or a standard for the inventory interface; an extended network element having a second port with a second inventory interface; and a second pluggable aom installed in the second port and coupled to the second inventory interface, where in response to a request to read a non-standard table entry, processing devices provide plm information to the extended network element in a format for a physical layer management system..
Commscope Technologies Llc

new patent

Flexible twdm pon with load balancing and power saving

An apparatus comprising an arrayed waveguide grating (awg) comprising a plurality of awg ports, a power splitter comprising a plurality of splitter ports, and a plurality of optical interleavers, each coupled to a respective awg port and a respective splitter port, for directing incoming optical signals to one of the awg and the power splitter.. .
Futurewei Technologies, Inc.

new patent

Transmit optical sub-assembly with local feedback

Aspects of a method and system for feedback during optical communications are provided. In one embodiment, a system for optical communications comprises a digital-to-analog converter (dac), a driver, and a transmit optical subsystem.
Maxlinear, Inc.

new patent

Information transmission method, information reception method and apparatus

An information transmitting method and device, and an information receiving method and device are provided. The information transmitting method includes: obtaining authentication information; converting the authentication information into a binary sequence; encoding the binary sequence into optical signals based on a correspondence between a binary number and an optical signal; and transmitting the optical signals to a receiving device, wherein the receiving device receives the optical signals, obtains the authentication information carried in the optical signals, and performs an information authentication based on the authentication information..
Tencent Technology (shenzhen) Company Limited

new patent

Constrained interleaving for 5g wireless and optical transport networks

The present invention provides a design framework that is used to develop new types of constrained turbo block convolutional (ctbc) codes that have higher performance than was previously attainable. The design framework is applied to design both random and deterministic constrained interleavers.

new patent

Method and performing path protection for rate-adaptive optics

A method and apparatus for performing path protection for rate-adaptive optics is provided. As part of the method, an aggregate input bit stream is received.

new patent

Fiber optic cabinet and network system with back-up connectivity

A fiber optic network (10) includes a mobile switching center (msc) (12) which distributes fiber optic signals to one or more remote cabinets (40, 42, 44). The remote cabinets (40, 42, 44) distribute signals to one or more customers.
Commscope Connectivity Belgium Bvba

new patent

Constrained interleaving for 5g wireless and optical transport networks

The present invention provides a design framework that is used to develop new types of constrained turbo block convolutional (ctbc) codes that have higher performance than was previously attainable. The design framework is applied to design both random and deterministic constrained interleavers.

new patent

Constrained interleaving for 5g wireless and optical transport networks

The present invention provides a design framework that is used to develop new types of constrained turbo block convolutional (ctbc) codes that have higher performance than was previously attainable. The design framework is applied to design both random and deterministic constrained interleavers.

new patent

Device and testing a concentrated photovoltaic module

The disclosure relates to a device and method for testing a concentrated photovoltaic module comprising a plurality of submodules, which comprises: light sources; and parabolic mirrors coupled with the light sources so as to reflect the light from each source in quasi-collimated light beams toward the module to be tested, perpendicular to the module. Each light source comprises: an optical system comprising two parallel lenses on either side of a diaphragm; a lamp on the optical axis of the system; a reflector arranged on the axis, on the side opposite the optical system relative to the lamp, and translatably movable along the axis; and a housing containing the optical system, the lamp and the reflector and including an outlet opening for the light beam on the axis..
Soitec Solar Gmbh

new patent

Vcsels and vcsel arrays designed for improved performance as illumination sources and sensors

A segmented vcsel array having a plurality of individually addressable segments, each segment comprising one or more vcsels. In some cases, at least two of the plurality of individually addressable segments may be driven in combination.
Vixar

new patent

Vcsels and vcsel arrays designed for improved performance as illumination sources and sensors

A vcsel array having a plurality of vcsels, each having more than two modes, and the optical emission from each of the vcsels overlaps in a far field of the vcsels. A vcsel array having a plurality of vcsels, each having an aperture size of at least about 6 μm, and the optical emission from each of the vcsels overlaps in a far field of the vcsels.
Vixar

new patent

Monolithic tunable terahertz radiation source using nonlinear frequency mixing in quantum cascade lasers

A terahertz difference-frequency generation quantum cascade laser source that provides monolithic, electrically-controlled tunable terahertz emission. The quantum cascade laser includes a substrate, a lower cladding layer positioned above the substrate and an active region layer with optical nonlinearity positioned on the lower cladding layer.
Board Of Regents, The University Of Texas System

new patent

Vcsels and vcsel arrays designed for improved performance as illumination sources and sensors

A vcsel package including a vcsel, a housing, containing the vcsel, and a diffuser operably attached to the housing and configured to receive an emitted beam of light from the vcsel and produce a beam of predetermined angular divergence. The housing may be a pllc package, a ceramic package, or a to-style package.
Vixar

new patent

Single pulse laser apparatus

Provided is a single pulse laser apparatus. The apparatus including a resonator having a first mirror, a second mirror, a gain medium, and electro-optic modulators (eoms) which perform each mode-locking and q-switching, the apparatus includes a photodiode which measures laser light that oscillates from the resonator, a synchronizer which converts an electrical signal generated by measuring the laser light into a transistor-transistor logic (ttl) signal, a delay unit which sets a latency determined in order to synchronize a mode-locked pulse with a q-switched pulse to the ttl signal, and outputs a trigger ttl signal according to the latency, and a q-driver which inputs the trigger ttl signal to the eom which performs q-switching, and causes the eom to operates..
Korea Institute Of Science And Technology

new patent

Optical fibers, sources of optical radiation and methods for providing low-speckle optical radiation

The present disclosure relates more particularly to active optical fibers, amplified spontaneous emission (ase) sources using such active optical fibers, and imaging and detection systems and methods using such ase sources. In one aspect, the disclosure provides an active optical fiber that includes a rare earth-doped gain core configured to emit radiation at at least a peak wavelength emitted wavelength when pumped with pump radiation having a pump wavelength; a pump core surrounding the gain core; and a cladding surrounding the pump core, wherein the value m=16r2(na)2/λ2 in which r is the gain core radius, na is the active optical fiber numerical aperture, and λ is the peak emitted wavelength, is at least 50, or at least 100.

new patent

Divided pulse layers

Methods, systems, and devices are disclosed for divided-pulse lasers. In one aspect, a pulsed laser is provided to include a laser cavity including an optical amplifier and a plurality of optical dividing elements and configured to direct a laser pulse of linearly polarized light into the plurality of optical dividing elements to divide the light of the laser pulse into a sequence of divided pulses each having a pulse energy being a portion of the energy of the laser pulse before entry of the optical dividing elements, to subsequently direct the divided pulses into the optical amplifier to produce amplified divided pulses.
Cornell University

new patent

Mode-locked multi-mode fiber laser pulse source

A laser utilizes a cavity design which allows the stable generation of high peak power pulses from mode-locked multi-mode fiber lasers, greatly extending the peak power limits of conventional mode-locked single-mode fiber lasers. Mode-locking may be induced by insertion of a saturable absorber into the cavity and by inserting one or more mode-filters to ensure the oscillation of the fundamental mode in the multi-mode fiber.
Imra America, Inc.

new patent

Optical source with passive pulse shaping

The invention relates to sources of sub-picosecond optical pulses based on single-pass or double-pass optical amplifiers with an optical gain bandwidth in the 2-20 nm range. A passive pulse shaping filter is provided in front of the optical amplifier for pre-shaping seed optical pulses so as to passively pre-compensate for the gain narrowing effect in the optical amplifier.
Lumentum Switzerland Ag

new patent

Tunable optical filter and tunable light source

A tunable filter structure comprising of a rotating disk made of metal parts in which n diffractive elements like bulk gratings are adjusted and mounted individually to disperse the incoming light and form a littman-metcalf configuration for selecting different wavelength of light, a servo motor to rotate the disk, a reflective element like mirror and a multi-branch configuration comprising of m branches that are synchronized in time and are combined by an optical coupler or an optical switch. In the second embodiment, the diffractive elements are replaced by the reflective elements to form a littrow configuration.





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