24 results about "Optical branch" patented technology

The invention discloses a remote sensing target detection model based on dynamic receptive field and multi-modal fusion. The remote sensing target detection model comprises the following steps: firstly, acquiring and preprocessing an optical remote sensing image and an SAR remote sensing image; then constructing a feature extraction network of the optical remote sensing image and the SAR remote sensing image, and obtaining feature output of the optical image and the SAR remote sensing image; modal-adaptive dynamic receptive field modules are embedded into the optical branch and the SAR branch respectively and are used for dynamically adjusting the size of a target receptive field according to target characteristics; then, through a cross-modal feature alignment and fusion module, the problem of geometric distortion is solved by utilizing deformable convolution, bidirectional alignment is performed on optical image features and SAR image features, and feature-level intelligent fusion is realized by adopting a space attention mechanism; according to the method, the complementary advantages of optical and SAR images are brought into full play, the size of a space receptive field is adaptively adjusted through a dynamic receptive field mechanism, and the calculation complexity is remarkably reduced while the detection precision is ensured.

The present invention discloses a method, device, medium, and equipment for detecting winter wheat under complex terrain conditions, relating to the field of image analysis technology. The method comprises: using digital elevation model data to reflect the terrain information of a preset winter wheat area; constructing a fusion segmentation network for multimodal data; an encoder comprising two residual modules and four multimodal feature fusion modules with a dual-branch structure; the dual-branch structure comprising an optical branch and an elevation branch; a decoder comprising four connected decoding modules, each of which comprises an upsampling module and a distribution feature enhancement module; the inputs of the last three upsampling modules in the decoder are respectively connected to the outputs of the first three optical branches in the encoder; the fusion segmentation network is trained using a multimodal training dataset to obtain a winter wheat detection model; and finally, the winter wheat detection model outputs a detection result. This method can accurately detect the distribution of winter wheat in complex terrain areas.

Provided is a waveplate comprising: a transparent substrate; a pattern layer that is patterned on the transparent substrate; a first cured resin layer that is formed on at least a part of the outer periphery of the pattern layer on the transparent substrate; and a second cured resin layer that is formed in a region on the transparent substrate, said region being further to the inner side than the first cured resin layer where the pattern layer is not formed. The pattern layer has a retardation film.

An optical input / output chip and distributed computing system, including: output sub-chip includes first light processing module to form N first light branches output from laser source, divide and modulate each first light branch into M first light sub-branches according to M wavelengths, form second optical branches containing N different modes from N modulated first optical branches before being output in first polarization state; input sub-chip includes second optical processing module, to form N third optical branches containing same mode from N second optical branches containing different modes, divide out part of light in each third optical branch having been converted from first polarization state to second, and form first polarization state again, combine and demodulate light in the first polarization state without conversion in original third optical branch after having been divided into M second optical sub-branches according to M wavelengths respectively. Thus increasing both communication rate and bandwidth effectively.

The present invention provides an optical communication network system, a central office optical transmission device, and a subscriber optical transmission device that transmit control signals to each subscriber optical transmission device without hindrance when the central office optical transmission device is connected to multiple subscriber optical transmission devices using an optical branch transmission path. [Solution] An optical communication network system 1 in which a central office optical transmission device 10 and a plurality of subscriber-side optical transmission devices (ONUs) are connected by an optical distribution network 116, wherein the central office optical transmission device includes a plurality of optical transmission termination units (OLTs), an optical multiplexer that generates a downlink frequency multiplexed signal by wavelength division multiplexing a downlink optical signal, and an intensity modulator that holds a time division multiplexed control signal obtained by time division multiplexing a downlink control signal, generates a downlink frequency multiplexed signal by intensity modulating the downlink frequency multiplexed signal accordingly, and sends it to the optical branch transmission path side. The subscriber-side optical transmission device demodulates the time division multiplexed control signal from the downlink frequency multiplexed signal and extracts the downlink control signal from the demodulated time division multiplexed control signal.

The application discloses a kind of SAR data active integration's remote sensing data timing seamless reconstruction method and device, belong to remote sensing image processing and space-time information analysis technical field.Sentinel-2 waveband and Sentinel-1 dual polarization data are screened and time-space alignment, radiation normalization and cloud mask construction are completed;Parallel operation dual-branch deep network optical branch extracts multi-scale space-time characteristics, SAR branch uses deformable convolution+texture self-attention to mine multi-scale directional texture;Then optical characteristics are used as Query, in cloud mask marked area active search SAR Key-Value complementary information, realize deep fusion by cross-modal multi-head attention;Fusion result is jointly corrected by relative time distance coding, time attenuation factor and cloud perception mask, and long-time sequence attention drift is inhibited;Final level fusion multi-level feature and adaptive weighting are outputted, and full-time seamless image is outputted.

The invention discloses a mechanical transfer displacement response calculation method of a finite periodic chiral unit structure, which is used for efficiently solving a compression-torsion coupling response of a finite chiral structure and representing acoustic and optical branch polarization. The method comprises the following steps: constructing a chiral subunit dynamic model consisting of a disc and an inclined elastic rod piece, and establishing a longitudinal polarization and torsional polarization coupling relationship based on bending deformation and tension-compression deformation of the rod piece under the action of longitudinal or torsional simple harmonic load, the method comprises the following steps of: obtaining longitudinal and torsional deviation amplitude values of acoustic branches and optical branches of each disc under low frequency and high frequency, superposing the polarization of the two branches in generalized coordinates to form displacement and torsional description, calculating kinetic energy, bending potential energy and tension-compression potential energy according to the displacement and torsional description, and establishing a fluctuation control equation by adopting a Lagrange equation; and substituting the inertia matrix, the stiffness matrix, the force boundary condition and the displacement boundary condition to solve the transfer displacement response and the transfer characteristic. The method can separate and quantify two branch contributions, and is suitable for chiral phononic crystal vibration isolation and filtering structure design.

This invention relates to a packaging box for a dual-channel PLC optical splitter for a space station and its manufacturing method. The packaging box for the dual-channel PLC optical splitter for a space station includes a box body, two input optical cable protective sleeves installed inside the box body, two sets of PLC cores that serve as backups for each other, a multi-output optical cable protective sleeve, and an array slot output positioning block. The two input optical cable protective sleeves and the multi-output optical cable protective sleeve are respectively installed at both ends of the box body. One axial end of each set of PLC cores has a single fiber of multi-output protection tube. An array slot output positioning block with an array of positioning slots is installed inside one end of the box body. One axial end of the multi-output optical cable protective sleeve passes through and is fixed in multiple positioning slots. The single fiber of the multi-output protection tube passes through the multi-output optical cable protective sleeve to form a multi-output optical cable. The other axial end of each set of PLC cores has a single fiber of two input protection tubes. The single fiber of the two input protection tubes passes through the two input optical cable protective sleeves to form two input optical cables.

The application discloses a multi-site two-photon imaging stimulation device coupled by non-parallel light axes, which comprises a femtosecond laser, a laser scanning device and at least two optical branches; the optical branch comprises a first focusing optical element, a mirror and a second focusing optical element; the femtosecond laser emitted by the femtosecond laser enters the laser scanning device, the laser scanning device repeatedly scans the femtosecond laser between multiple scanning intervals, and the femtosecond laser of each scanning interval reaches a corresponding target site after passing through a corresponding optical branch; the femtosecond laser entering the optical branch is reflected to the second focusing optical element after being focused for the first time by the first focusing optical element, and reaches the corresponding target site visual field plane after being focused for the second time. The multi-site two-photon imaging stimulation device coupled by non-parallel light axes provided by the application is suitable for two-photon imaging or optical stimulation on multiple planar visual field regions with spatial angles located on a curved sample.

The present invention relates to a lidar device for detecting the environment of a vehicle (10), wherein the lidar device comprises the following: at least one laser light source (18) designed to emit laser light, a plurality n of optical heads (12) each with an optical transmitting (36) and receiving unit for emitting laser light into the environment and for receiving laser light reflected from the environment, wherein Each optical head (12) is assigned a detector (20) which is designed to convert received laser light into electrical signals, According to the invention, a first optical splitter (24) is provided which is configured to divide the emitted laser light of the at least one laser light source (18) into n parts and to direct them into n optical branches (28), each of which includes one of the optical heads (12) and one of the detectors (20).

A beam splitter is provided to divide incident light into a multitude of different components and to emit these components. The beam splitter comprises a first light-transmitting element, which has a first surface and is transparent to the incident light; a second light-transmitting element, which has a second surface and is transparent to the incident light; an optical branching layer, which serves to split the incident light into the multitude of components; and an adhesive element configured to connect the first and second light-transmitting elements. The first and second light-transmitting elements are arranged so that their first and second surfaces face each other, with the optical branching layer positioned between them.

The present invention provides a beam splitter for splitting incident light into a plurality of different components and emitting the split light, the beam splitter comprising: a first light-transmitting member having a first surface and transmissive to the incident light; a second light-transmitting member that has a second surface and is transmissive to the incident light; an optical branching film having a function of branching the incident light into the plurality of components; and an adhesive member for adhering the first light-transmitting member and the second light-transmitting member, the first light-transmitting member and the second light-transmitting member being disposed so that the first surface and the second surface face each other with the optical branching film interposed therebetween.

To provide a wavelength plate which can suppress occurrence of cracks of a retardation film.SOLUTION: A wavelength plate 10 includes a transparent substrate 11, a pattern layer 121 which is pattern-formed on the transparent substrate 11, a first curable resin layer 131 which is formed on the outer periphery of the pattern layer 121 on the transparent substrate 11, and a second curable resin layer 132 which is formed in a region where the pattern layer 121 is not formed, on the inner peripheral side of the first curable resin layer 131 on the transparent substrate 11. The pattern layer 121 has a retardation film 12b.SELECTED DRAWING: Figure 1

This invention discloses a method and apparatus for seamless temporal reconstruction of remote sensing data by actively integrating SAR data, belonging to the field of remote sensing image processing and spatiotemporal information analysis technology. The method involves screening Sentinel-2 and Sentinel-1 dual-polarization data and performing spatiotemporal alignment, radiometric normalization, and cloud mask construction. A dual-branch deep network is run in parallel; the optical branch extracts multi-scale spatiotemporal features, while the SAR branch mines multi-scale directional textures using deformable convolution and texture self-attention. Subsequently, the optical features are used as queries to actively retrieve complementary key-value information from the SAR data within the cloud mask-marked region, achieving deep fusion through cross-modal multi-head attention. The fusion result is then jointly corrected by relative temporal distance encoding, temporal decay factor, and cloud-sensing mask to suppress long-term attention drift. Finally, multi-level features are hierarchically fused and adaptively weighted to output a seamless, full-temporal image.

The present invention provides a communication device that is a base station included in a MIMO system using hybrid BF and RoF, the MIMO system including an optical amplifier having a constant output, the optical amplifier being provided between a multiplexer that multiplexes RoF signals and a demultiplexer that demultiplexes an output of the multiplexer by wavelengths. The communication device includes: the demultiplexer; a plurality of photoelectric converters that convert incident RoF signals into radio signals; optical branches that branch the incident RoF signals; an optical switch that switches one or both of an output destination of signals demultiplexed by the demultiplexer and an output source of signals to be input to the photoelectric converters; and a control unit that controls an operation of the optical switch on the basis of an optical level of each of RoF signals obtained by the demultiplexer by wavelengths.

This invention relates to a photonic chip-integrated micro-hemispherical resonator gyroscope, belonging to the field of microelectromechanical systems (MEMS) technology. It includes: a vacuum cavity, a substrate disposed within the vacuum cavity, and an uncoated micro-hemispherical resonator disposed on the substrate; interdigitated electrode driving units and a silicon-based photonic chip are also disposed on the substrate; the interdigitated electrode driving units are arranged below the edge of the uncoated micro-hemispherical resonator; the silicon-based photonic chip includes a laser, a first multimode interferometer beam splitter, an optical branch coherent functional component, and a photodetector connected sequentially in the optical path; the number of the optical branch coherent functional component and the photodetector corresponds to the number of output terminals of the first multimode interferometer beam splitter, and the grating coupler group in the optical branch coherent functional component is arranged below the edge of the uncoated micro-hemispherical resonator. This invention can retain the intrinsic high Q value of the resonator and achieve miniaturized and integrated micro-hemispherical resonator gyroscope.

The invention discloses a multi-mode remote sensing image semantic segmentation method and device combining an optical image and an SAR (Synthetic Aperture Radar). The method comprises the following steps: inputting an optical image and an SAR image into a multi-mode remote sensing image semantic segmentation network to obtain an image segmentation result; the processing process of the multi-mode remote sensing image semantic segmentation network comprises the following steps: inputting an optical image into an optical branch to obtain an optical image segmentation result, and inputting an SAR image into an SAR branch to obtain an SAR image segmentation result; the features corresponding to the optical images output by the optical branches and the features corresponding to the SAR images output by the SAR branches are fused to obtain optical-SAR fusion features, and the optical-SAR fusion features are input into the fusion feature branches to obtain a fusion semantic segmentation result. According to the method, the ability of the model to express semantic and detail features by using optical-SAR cross-modal features is significantly improved, and a more efficient solution is provided for improvement of prediction accuracy of a remote sensing image semantic segmentation method.

The invention relates to an optical image cloud removal method based on CNN-Transform heterogeneous architecture and SAR (Synthetic Aperture Radar) guidance, and belongs to the technical field of image processing and computer vision. The method comprises the following steps: respectively extracting structure and spectral features by constructing SAR and optical parallel double branches; cross-axis attention is integrated to an optical branch, mining of global spectral context and long-range space correlation of an optical image is realized, and meanwhile, the calculation complexity is reduced; designing a cross-modal guide mechanism between the double branches, and establishing semantic level association between structural information in the SAR image and spectral information of the optical image; and finally, realizing accurate feature alignment and adaptive weighting through a spatial adaptive fusion strategy. And finally, a high-quality reconstruction effect with a clear ground object structure and natural spectrum transition is achieved under a complex cloud coverage condition, and the precision and efficiency of the cloud removal effect are remarkably improved.

The application provides a remote sensing image cloud removing method and system based on optical remote sensing images and synthetic aperture radar images, and belongs to the technical field of remote sensing image processing. The method first acquires paired optical remote sensing images and synthetic aperture radar images; then a double-branch feature extraction network of an optical branch and a SAR branch is constructed to extract spectral and context features of the optical images and structural and texture features of the SAR images respectively; on this basis, the optical features and the SAR features are dynamically weighted and fused through a hierarchical cross-modal adaptive fusion module to obtain a fused feature map; and finally, the fused feature map is reconstructed to output a cloud-free remote sensing image. The application can realize high-quality remote sensing image cloud removing reconstruction under complex cloud conditions.

The invention discloses an SAR and optical image fusion-oriented modal collaborative adaptive weight space target identification method, which comprises the steps of S1, constructing a multi-modal data set of satellite optical and SAR images, the data set comprising N pairs of registered SAR and optical images and corresponding category labels; s2, respectively extracting depth feature representations of the optical image and the SAR image obtained in the S1; s3, predicting the imaging quality of each modal of the depth features extracted in the S2, realizing QADA quality perception fusion through quality-guided asymmetric cross attention, constructing quality-enhanced fusion feature representation, and calculating the basic loss of an optical branch, an SAR branch and a fusion branch; s4, based on the three-branch basic loss and the prediction probability calculated in the S3, dynamically calculating respective loss weights through five cooperative factors MSAW, and jointly optimizing three-branch network parameters by using weighted total loss and consistency regularization until convergence; and S5, inputting the test data into the network to predict and identify the satellite category.

The invention relates to a photon chip integrated micro-hemispherical resonator gyroscope, which relates to the technical field of micro electro mechanical systems, and comprises a vacuum cavity, a substrate arranged in the vacuum cavity, and an uncoated micro-hemispherical resonator arranged on the substrate, an interdigital electrode driving unit and a silicon-based photon chip are also arranged on the substrate; the interdigital electrode driving unit is arranged below the edge of the uncoated micro-hemispherical harmonic oscillator; the silicon-based photon chip comprises a laser, a first multimode interferometer beam splitter, an optical branch coherent functional component and a photoelectric detector which are sequentially connected according to an optical path; the number of the optical branch coherent functional components and the photoelectric detectors corresponds to the number of the output ends of the beam splitter of the first multimode interferometer, and grating coupler groups in the optical branch coherent functional components are arranged below the edge of the uncoated micro-hemispherical harmonic oscillator. According to the invention, the intrinsic high Q value of the harmonic oscillator can be kept, and the miniaturization integration of the micro-hemispherical resonator gyroscope is realized.

The application discloses a landslide detection method based on adaptive fusion of optical satellite remote sensing and DEM data, and takes optical satellite remote sensing data and DEM data as core inputs to construct a heterogeneous double-branch high-resolution network: the optical branch adopts HRNet-W48 to extract spectral texture features, and the DEM branch adopts a lightweight HRNet-W18 to extract terrain geometric features. A terrain perception gating fusion module is designed, a pixel-level weight mask is dynamically generated based on the terrain features reflected by the DEM data through the gating network, and the adaptive weighted fusion of optical and terrain features is realized in the form of residual error; a CE+BCL combined loss function is proposed, and the boundary contrast loss is used to strengthen the supervision of the landslide edge area. The application effectively solves the problems of rigid fusion strategy, loss of spatial details and fuzzy boundary in the traditional method, and significantly improves the accuracy, boundary clarity and complex scene adaptability of landslide recognition.

Ensure a stable supply of sufficient monitor light. [Solution] The optical device 10A according to the present invention comprises an optical functional layer on a substrate. The optical functional layer includes optical branching sections 120a, 120b, 120c that branch the visible light emitted from each visible light laser light source 301a, 301b, 301c, monitoring optical waveguides 130a, 130b, 130c connected to one output of each optical branching section 120a, 120b, 120c, and modulation optical waveguides 140a, 140b, 140c connected to the other output of each optical branching section 120a, 120b, 120c. The monitoring light propagating through the monitoring optical waveguides 130a, 130b, 130c is emitted from monitoring ports 131a, 131b, 131c. The indicator light propagating through the modulation optical waveguides 140a, 140b, and 140c is modulated by the optical modulation units 170a, 170b, and 170c, then combined by the optical multiplexer 180 and emitted from the optical output port 191.

The invention belongs to the field of laser communication, and particularly discloses an indoor laser communication and distance measurement integrated terminal, a distance measurement method and a link establishment method. According to the invention, based on the retro-reflection light formed by the coated optical fiber / retro-reflection prism module of the opposite terminal, the coupling efficiency of the retro-reflection light is detected by the photoelectric detector at the own terminal for alignment, and the angle measurement function unit is integrated into the optical fiber module for laser communication, so that the integration of communication and angle measurement is realized. On the premise that the angle measurement precision is guaranteed, an angle measurement optical branch in a traditional scheme is omitted, the size and weight of the system are reduced, and the structure is compact; the number of optical axes of the laser terminal is reduced, and the system anti-vibration capability is enhanced. In addition to laser communication, the relative distance between the terminals is obtained through nutation in alignment, compared with an existing distance measurement method, laser modulation or additional detection equipment does not need to be additionally carried out, only devices used in the communication alignment process need to be used, additional angle measurement devices are not added, and communication and distance measurement integration is achieved.