31 results about "Active optics" patented technology

The invention discloses an active optical alignment method based on a local lightweight language model, and particularly relates to the technical field of precision installation and adjustment, comprising the following steps: extracting image indexes and platform attitude information through image acquisition, constructing a unified input format, verifying and inputting the language model; generating a six-degree-of-freedom pose adjustment strategy and a credibility score; the strategy is executed by the platform control device after being verified by a preset criterion; scoring is performed again after execution, and whether a feature posture is recorded or error compensation is triggered is judged according to a scoring result, so that subsequent input and strategy generation are optimized, and alignment precision and stability are improved; according to the method, the data consistency is guaranteed through a unified input format and a verification mechanism, the alignment precision is improved in combination with a dynamic scoring strategy, and the stability and fault tolerance of the system are enhanced by introducing a feature attitude recording and error back-filling mechanism, so that a strategy generation and execution process with high reliability, high adaptation and high robustness in an active optical alignment task is realized.

A kind of telescope active optical correction system correction accuracy testing device, including laser interferometer, multidimensional adjusting table, wave aberration measurement component and plane mirror, laser interferometer is placed in the outside of optical telescope for emitting test light to the inside of optical telescope, to detect the wave aberration data of multiple fields of view;Multidimensional adjusting table is used to adjust the position, angle of optical element in optical telescope, to simulate the situation that telescope imaging quality drops;Wave aberration measurement component is set at the image plane of telescope for measuring the wave aberration after optical telescope imaging quality drops, and plane mirror is used to reflect test light.The present application relates to a kind of telescope active optical correction system correction accuracy testing method, the displacement amount and rotation angle of optical element when comparing when simulating image quality drop and when correcting judge the correction accuracy of active optical correction system, compare wave aberration before simulating image quality drop and after correction, judge whether the image quality after correction reaches the image quality before simulating image quality drop.

In an aspect of the present invention, a new active optic is provided, namely, a photo-magnetically actuated deformable mirror (PMADM) made of a magnetic composite structure and an optical quality substrate layer. The magnetic layer is composed of Polydimethylsiloxane (PDMS) and powdered ferromagnetic CrO2. A magnet may be used to deform the mirror surface. The powdered CrO2 has a low Curie temperature (preferably around 395 K) which allows changing the magnetization of the magnetic layer using a laser heating source, thus providing control over the deformation. In one embodiment, the structure has an overall dimension of 1.2 inch 1.2 inch 175 μm with an optical pupil diameter of 8 mm. The PMADM is estimated to deform to a maximum stroke of 8.7731 μm before failure with a 3 safety factor.

The invention relates to a segmented mirror surface channel spectrum determination method, belongs to the technical field of optical measurement, and solves the problems that most of the existing co-phase detection technologies cannot meet the detection requirements of high precision, wide range, real-time performance and the like at the same time, and the difficulty and complexity of a primary mirror system for realizing co-phase are further increased along with the increase of the number of spliced sub-mirrors. The method comprises the following steps that an optical fiber beam combiner is adopted for light source input, coherent light with different wavelengths is combined, and the combined light enters a segmented mirror system; constructing an interference intensity distribution template of the sub-channel spectrum by using the theoretical model; obtaining the central stripe position of each section of channel spectrum; and the step difference of the segmented mirror is obtained by combining the dispersion constant and the spectral center position. According to the method, the spectral side of the segmented mirror surface channel can be accurately measured, and a basis is provided for correction of an active optical system, so that a high-precision spliced mirror in a global coplanar state is obtained.

The invention discloses an optical transparent adhesive tape with an electric tuning refractive index and a preparation method thereof. The optical transparent adhesive tape comprises a polymer matrix; the core-shell structure liquid crystal microcapsule is dispersed in the polymer matrix, the core of the core-shell structure liquid crystal microcapsule contains nematic phase liquid crystals and polymerizable monomers, the shell of the core-shell structure liquid crystal microcapsule is a cross-linked polymer layer, and an ion trapping agent is distributed in the shell; the transparent electrodes are arranged on the two sides of the polymer matrix; wherein the orientation of liquid crystal molecules in the inner core is changed by applying voltage to the transparent electrode, so that the dynamic regulation and control of the overall refractive index of the electrically tuned refractive index optical transparent adhesive tape are realized. According to the electrically tuned refractive index optical transparent adhesive tape provided by the invention, the OCA is successfully upgraded from a passive bonding material to an active optical regulation and control element, low-voltage, rapid and stable regulation and control of the refractive index are realized while excellent bonding performance and optical performance are maintained, and a brand new technical path is opened up for improving the display quality and realizing a novel display function.

A plant sensor device that suppresses the influence of external light from the surrounding environment and determine highly accurate parameters relating to the leaf biomass of a plant with a simple and low-cost configuration for quantifying the degree of plant growth, which is a plant sensor device 100, including: a light source 11 that intermittently irradiates a plant with near-infrared light (NIR); a radiation sensor 21 that is disposed on a side opposite to the light source 11 with respect to the plant, receives transmitted light of the near-infrared light that has passed through the plant, and outputs a photoelectrically converted output value; and a recording unit 31 that records the output value from the radiation sensor 21, in which the recording unit 31 records an irradiation period and an extinction period of the near-infrared light in the light source 11, and the recording unit 31 classifies output values from the radiation sensor into the following: (1) NIR output values during the irradiation period of the near-infrared light; and (2) non-irradiated output values during the extinction period of the near-infrared light; and a method for active optical sensing of plants.

This invention discloses a method for detecting load sway in bridge cranes based on dual-channel vision. The invention employs an active optical filtering strategy, utilizing short exposure combined with infrared illumination and reflective markers to suppress ambient light interference. At the algorithm level, a dual-channel detection architecture is constructed: the high-speed channel uses a classic vision algorithm based on region of interest (ROI) prediction and sub-pixel localization to ensure real-time performance; the redundant channel uses a quantized lightweight deep learning network to ensure robustness under complex operating conditions. An adaptive fusion strategy based on confidence evaluation dynamically coordinates the outputs of the two channels, and the redundant channel is used to update the prior information of the high-speed channel. This invention achieves high-precision, high-real-time, and high-reliability load sway detection on an embedded edge computing platform, effectively solving the detection challenges caused by changes in lighting, occlusion, and strong interference sources in industrial environments.

The invention relates to the technical field of active optics, and particularly provides a time sequence filtering-based wave-front correction method for a patrol telescope, which comprises the following steps of: firstly, acquiring time sequence wave-front data of the telescope through a wave-front curvature sensor, decomposing the time sequence wave-front data in a spatial domain through a Zernike polynomial, forming a time sequence coefficient sequence by coefficients of each item of the Zernike polynomial in a time domain, and correcting the time sequence coefficient sequence according to the time sequence coefficient sequence; and carrying out frequency domain analysis on each time sequence coefficient sequence, calculating a power spectrum, identifying static aberration by using a Greenwood frequency as a threshold value, filtering dynamic aberration, and then carrying out wavefront correction. According to the method, Zernike polynomial decomposition and frequency domain filtering are combined, high-frequency disturbance introduced by atmospheric turbulence is effectively separated and filtered out, and low-frequency aberration wavefront correction is accurately achieved through active optics.

The application relates to a computer-implemented method for object detection in a point cloud (28) generated by means of an active optical sensor system (10), wherein points of the point cloud (28) have a respective intensity signal (30) of a respective received reflection, wherein the method comprises: • Transforming the respective intensity signal (30) so that the optical power of the respective intensity signal (30) can be determined from the transformed (32) and • Performing object detection using the transformed intensity signals (32). The application also concerns an electronic vehicle system and a computer program product.

The application relates to a computer-implemented method (200) for detecting artifacts (60.A) in a point cloud (28) of an environment (22) of a vehicle (20) generated by means of an active optical sensor system (10), wherein the point cloud (28) contains point information relating to reflection points, the point information depending on the position of the reflection point in a two-dimensional field of view (50), the distance of the respective reflection point and the optical intensity of the respective received reflection, wherein the field of view (50) has vertical columns (SP) in relation to the detected environment (22), wherein the method comprises: • Column-wise evaluation of the point information, • Column-wise detection of optical artifacts (60.A), especially depending on the result of the evaluation of a respective preceding column (SP). The application further relates to a method for at least partially autonomous driving of a vehicle (20), an electronic vehicle system, a vehicle (20), a computer program product, a computing unit (24) and a data carrier.

This invention relates to the field of mineral conveying technology, and more particularly to a machine vision-based system for detecting and separating impurities in quartz glass raw materials. The system employs a data acquisition module to obtain image datasets of the quartz glass raw materials and synchronous environmental parameters. A raw material feature extraction module extracts particle size distribution and transmittance characteristics to determine the raw material's feature values. A raw material feature classification module classifies the raw materials into coarse-grained, high-transmittance or fine-grained, low-transmittance types based on the feature values, synchronous environmental parameters, and classification thresholds. An active optical modulation module applies polarization-modulated light or wavelength-selective modulation light based on the raw material type. A modulation analysis and processing module acquires the modulated light image, analyzes it, and outputs impurity information and early warnings. This invention achieves adaptive selection of optical modulation strategies based on the particle size and transmittance characteristics of the raw materials, overcoming the problem of missed detection caused by optical interference, improving the accuracy of impurity detection and system adaptability, and meeting the technical requirements for continuous and stable production of high-purity quartz sand.

The invention relates to a computer-implemented method for determining object information in a point cloud (28) generated by means of an active optical sensor system (10), wherein the point cloud (28) comprises point information for reflection points, the point information being dependent on the corresponding distance (di) of the reflection point, the method comprising: • determining an object (O) in the point cloud (28), • determining a ghost object (GO) associated with the object (O) in the point cloud (28), and • determining object information relating to the object (O) using the ghost object (GO). The invention also relates to: a method for at least partially autonomous driving of a vehicle (20); an electronic vehicle system; a vehicle (20); a computer program product; a processing unit (24); and a data carrier.

In an embodiment, an apparatus is disclosed that includes at least one processor configured to determine a target coupling-out facet, identify an optical path to the target coupling-out facet, identify an active wave plate corresponding to the optical path, determine a target state of the active wave plate that corresponds to the optical path, set the active wave plate to the identified target state and cause a projection device to project a light beam comprising an image field of view component along the identified optical path.

This invention relates to a robot path planning method and system based on optical vision, comprising the following steps: acquiring environmental images of the robot's environment and robot motion information; obtaining a dense 3D point cloud map based on the environmental image through contrast enhancement, signal extraction, decoding, and interpolation optimization; generating a semantically labeled 3D point cloud map based on the dense 3D point cloud map and a color RGB visible light environmental image through background culling, image tracking, semantic recognition, and clustering; estimating the robot's motion state based on the semantically labeled 3D point cloud map and robot motion information, performing global and local path planning, and obtaining a local path after trajectory smoothing; and converting the local path into the robot's actual actions by combining the robot's motion state. This invention effectively achieves a balance between cost control and performance improvement through an active optical vision perception architecture and multi-algorithm collaborative design.

The invention discloses a to-be-measured object surface multi-angle data output device, method and system and a medium, and the device comprises at least one camera which is installed above a to-be-measured object; the first spectroscope is mounted outside the visual field of the camera and is used for dividing the laser beam into at least two sub-beams; the beam splitter is mounted on a propagation path of the sub-beams and is used for splitting the sub-beams and then enabling the sub-beams to reach the first reflectors at different positions, so that reflected light of the first reflectors is modulated through corresponding gratings to form stripe light, and the stripe light is projected to the surface of an object to be measured; the second spectroscope is mounted between the first reflector and the corresponding grating; according to the invention, the pointing stability of each projection light path is maintained in real time through active optical feedback compensation, the system drift error is fundamentally suppressed, long-term and reliable multi-angle phase deflection measurement is realized, and the pollution of low signal-to-noise ratio data is effectively suppressed by introducing a self-adaptive weighted fusion mechanism based on pixel-level contrast.

The application relates to a computer-implemented method for determining object information in a point cloud (28) generated by means of an active optical sensor system (10), wherein the point cloud (28) contains point information for reflection points which depends on the respective distance (di) of the reflection point, wherein the method comprises: • Identifying an object (O) in the point cloud (28), • Determining a ghost object (GO) belonging to the object (O) in the point cloud (28), • Determining object information about the object (O) using the ghost object (GO). The application further relates to a method for at least partially autonomous driving of a vehicle (20), an electronic vehicle system, a vehicle (20), a computer program product, a computing unit (24) and a data carrier.

A space domain awareness (SDA) system includes several sensor spacecraft, some in Earth orbit and others in cislunar space. Each sensor spacecraft can include a sensor payload of an active optical sensor (e.g., a laser emitter and laser detector) and an SDA processor. The processor detects, tracks, and characterizes resident space objects (RSOs) using the output from the active optical sensor. In some embodiments, the sensor payload also includes a passive optical sensor, an electromagnetic sensor, and / or a plasma sensor; the SDA processor can use the outputs of these optional additional sensors to detect, track, and characterize RSOs as well. It is also contemplated that the SDA system can include a plurality of debris capture spacecraft, each of which includes a debris impact pad that includes a series of shield and stuffing layers that respectively increase in density along an intercept direction.

This invention relates to the field of light source module technology, specifically to a method for manufacturing a street light source module and the street light source module itself. The method includes the following steps: S1, preparing a pre-integrated assembly, which includes a glass lens and an aluminum substrate. An LED bead array and a PCB waterproof adapter bridge are soldered to the front side of the aluminum substrate using surface mount technology. The annular pads of the PCB waterproof adapter bridge and the corresponding pads on the aluminum substrate are fused to form a metal sealing ring. S2, active optical alignment and pre-fixing, whereby the glass lens and the aluminum substrate assembly are placed on a fixture with fine-tuning function for preliminary alignment. The beneficial effects of this invention are: through a dynamic alignment system of visual closed-loop feedback and multi-axis linkage fine-tuning, it solves the technical problems of inaccurate alignment between the lens and LED light source and systematic deviations between the actual light spot and the designed light pattern during the assembly of existing street light source modules.

The application discloses a kind of small concave Offner spectral imaging systems based on active optics, design method and aberration correction method, belong to spectral imaging technical field.The system includes the concave spherical surface reflection main mirror of ball center coincidence, convex spherical surface grating and deformable concave spherical surface reflection three mirrors;Light beam is shot into by incidence slit, is reflected to grating spectroscopy by main mirror, then is imaged after being reflected by three mirrors.Design method adjusts curvature radius ratio and off-axis amount to make astigmatism meet requirements to determine initial structure, and surface shape coefficient is solved after optimization and surface shape is iteratively adjusted to within range.Aberration correction method is solved by constructing wave aberration matrix and driver response matrix to correct aberration.The application realizes the imaging of super-long slit large field of view at the same time, simple structure, easy to assemble and adjust, can realize the integration of large field of view general survey and local high-resolution detailed survey imaging.

The invention relates to the technical field of unmanned aerial vehicle intelligent surveying and mapping and computer vision, and discloses an unmanned aerial vehicle geographic information acquisition and data processing integrated system which comprises an unmanned aerial vehicle platform, a multi-degree-of-freedom pan-tilt camera and an airborne edge calculation module. The system constructs an implicit neural radiation field of a geographic scene at an airborne end in real time, and calculates a weighted luminosity residual error by comparing a rendered prediction image with an actual observation image; and error gradient distribution is extracted by using back propagation, and an optical-mechanical coupling control instruction is directly generated to drive a camera to carry out active optical zooming and holder attitude adjustment, so that physical focusing acquisition and online network parameter updating of a high-frequency error region are realized. Meanwhile, the system performs active viewpoint planning and obstacle avoidance navigation by using semantic-geometric joint entropy. According to the invention, the crossing from passive shooting to active perception is realized, the three-dimensional modeling is synchronously completed in the acquisition process, and the surveying and mapping efficiency and the reconstruction precision in a complex environment are remarkably improved.

This invention discloses an active optical splicing system and its operating method for achieving continuous mirror edges. The system includes several sub-mirrors, a sub-mirror support mechanism, and a sub-mirror adjustment mechanism. The sub-mirror support mechanism is installed at the bottom of the sub-mirrors to support them. The sub-mirror adjustment mechanism includes a displacement actuator, a common support plate mounted on the displacement actuator, and a flexible adjustment device mounted on the common support plate. The displacement actuator and the common support plate are positioned at common support points of adjacent sub-mirrors. The flexible adjustment device includes an adjustment drive device and a flexible support rod. The adjustment drive device is connected to one or more flexible support rods, and each flexible support rod is connected to one of the adjacent sub-mirrors. The height of the sub-mirror perpendicular to the mirror surface is adjusted by the sub-mirror adjustment mechanism. This invention is applicable to the engineering implementation of spliced ​​mirrors in various large-aperture astronomical telescopes and large-aperture optical systems.

The invention discloses an electromagnetically-driven micromirror array, and belongs to the field of active optics. The micro-mirror array is composed of a mirror surface, a driving structure, a shell and a magnet. Wherein the mirror surface is positioned above the driving structure, so that the driving structure is conveniently shielded, and the filling ratio is improved. The magnet is located below the driving structure, and the whole structure is of a sandwich type structure. The driving structure and the magnet generate a force effect to drive the mirror surface to incline and translate so as to realize regulation and control of an optical path, and each unit can be independently controlled to incline or translate. The invention has the advantages of no need of a complex driving structure, large static deflection angle, low manufacturing cost, high packing ratio and facilitation of large-scale integration.

The invention relates to the technical field of active optics, in particular to a segmented telescope calibration method based on mirror surface scattering and sphere center imaging, which comprises the following steps: emitting detection laser at an equivalent sphere center of a spliced mirror surface, and arranging a mask plate and a diffraction grating on an emergent light path of the detection laser, so that the detection laser passing through the mask plate is diffracted to form a structured light beam; the structured light beams are copied and deflected in space by utilizing a diffraction grating, so that a two-dimensional periodic light beam array formed by a plurality of structured light beams is generated; scattering light spots are formed around a splicing seam of the spliced mirror surface by utilizing a scattering effect generated by the microscopic roughness of the spliced mirror surface; the distribution image is compared with a preset calibration template, the deviation of scattered light spots on the distribution image relative to theoretical light spots on the calibration template is obtained, and the deviation is inhibited by adjusting the pose of the sub-mirror. According to the invention, the problems of high calibration cost, low energy utilization rate and the like of light spot detection and correction by using a hologram traditionally are solved.

The application discloses a kind of single-pulse broadband circular dichroism absorption measurement device for femtosecond time-resolved spectroscopy, it is related to optical measuring instrument technical field, including: femtosecond laser, output light is divided into pump light and probe light two parts;Pump light path module, including optical parametric amplifier or nonlinear frequency doubling module, polarization modulation device and chopper, for adjusting pump light to circularly polarized light and its frequency is reduced to one half of femtosecond laser frequency;The single-pulse broadband circular dichroism absorption measurement device for femtosecond time-resolved spectroscopy, before sample probe light is vertical direction or horizontal direction linearly polarized light, in the propagation process will not be influenced by the reflectivity of optical element to vertical polarization light and horizontal polarization light different.The two beams of light separated can realize self-reference and improve signal-to-noise ratio, and avoid using beam splitting optical element and affect the accuracy of polarization state. Avoid using active optical modulation element to reduce the damage risk of equipment and device.

This invention belongs to the field of deep-sea exploration technology and relates to a laser guidance method and system for deep-sea equipment. The method includes: remotely locating an underwater vehicle or docking device based on acoustic signals emitted by an ultra-short baseline positioning beacon on the landing equipment, enabling the underwater vehicle or docking device to enter a preliminary target area; activating an active optical guidance module on the landing equipment to emit visible light signals carrying preset spatial structure and encoding information; searching for and capturing visible light signals within the preliminary target area using an image acquisition device on the underwater vehicle or docking device; performing real-time image decoding to obtain the identification code and geometric features of the projected image of the landing equipment; and based on this and the acquired imaging parameters, obtaining the definite three-dimensional spatial position of the underwater vehicle relative to the landing equipment. This invention solves the problem of 1 / 100 directional drift error in the deep sea and achieves high-precision three-dimensional positioning of the base equipment.

The present application relates to the field of image processing and machine vision, in particular to a metal surface mark identification method and system based on multi-modal parameter fusion and active optical adjustment, the method comprising: constructing a conditional parameter space; performing initial sampling in the parameter space, obtaining initial sampling parameters and initial image data; performing image quality characterization on the initial image data to generate an image quality characterization vector; generating a next set of sampling parameters through an imaging parameter optimization model according to the image quality characterization vector and the current sampling parameters; collecting next image data according to the next set of sampling parameters, iteratively performing quality characterization and parameter optimization until the image quality characterization vector reaches a preset threshold, recording the final imaging parameters and the corresponding target image; inputting the target image and the final imaging parameters into a multi-modal identification model to output an identification result. Through active optical adjustment and closed-loop iterative optimization, the present application can improve the accuracy and adaptability of mark identification.

The present application relates to the field of active optics, and specifically provides a time series filtering-based wavefront correction method for a survey telescope, which obtains time series wavefront data of the telescope through a wavefront curvature sensor, decomposes the time series wavefront data in a spatial domain through Zernike polynomials, forms a time series coefficient sequence for each term of the Zernike polynomials in a time domain, performs frequency domain analysis on each time series coefficient sequence, calculates a power spectrum, uses a Greenwood frequency as a threshold to identify static aberrations, and performs wavefront correction after filtering out dynamic aberrations. The present application effectively separates and filters out high-frequency disturbances introduced by atmospheric turbulence by combining Zernike polynomial decomposition and frequency domain filtering, and accurately realizes low-frequency aberration wavefront correction through active optics.

Provided are a plant sensor device that can suppress the influence of external light from the surrounding environment and determine highly accurate parameters relating to the leaf biomass of a plant with a simple and low-cost configuration for quantifying the degree of plant growth, which is a plant sensor device 100, including: a light source 11 that intermittently irradiates a plant with near-infrared light (NIR); a radiation sensor 21 that is disposed on a side opposite to the light source 11 with respect to the plant, receives transmitted light of the near-infrared light that has passed through the plant, and outputs a photoelectrically converted output value; and a recording unit 31 that records the output value from the radiation sensor 21, in which the recording unit 31 records an irradiation period and an extinction period of the near-infrared light in the light source 11, and the recording unit 31 classifies output values from the radiation sensor into the following: (1) NIR output values during the irradiation period of the near-infrared light; and (2) non-irradiated output values during the extinction period of the near-infrared light; and a method for active optical sensing of plants.