531 results about "Facula" patented technology

The application provides a FLASH treatment system, a Cerenkov detector, a beam flux measuring device and a method thereof. The Cerenkov detector comprises: a Cerenkov radiator, which is arranged on the path of the beam current and is irradiated by the beam current to generate Cerenkov radiation light propagating in the Cerenkov radiator; the direction of the beam current intersects with the receiving surface of the Cerenkov radiator, and the Cerenkov radiation light serves as light signals for measurement; and a light signal collection array, which is arranged on the light path of the Cerenkov radiation light and is not directly irradiated by the beam current, is used to collect the Cerenkov radiation light and output analog signals, and the analog signals are used to indicate the light intensity, light spot position and trigger time of the Cerenkov radiation light at different positions of the light signal collection array. Through the arrangement of the Cerenkov radiator and the light signal collection array, the detector remains relatively stable and is not prone to damage when measuring the beam current, and the service life of the detector is improved.

Embodiments of the present disclosure relate to a method and apparatus for judging a light spot condition based on goodness of fit (GOF). The method includes: projecting a light spot to be measured to a plurality of predetermined point positions in a predetermined size standard film measurement area, the predetermined size being larger than the size of the light spot to be measured, the standard film measurement area being surrounded by a peripheral film area and having a known thickness, the film thickness of the peripheral film area being significantly different from the film thickness in the standard film measurement area; measuring light reflected from each of the plurality of predetermined point positions to obtain a film thickness measurement spectrum related to each predetermined point position; determining a film thickness spectrum goodness of fit corresponding to each predetermined point position based on the film thickness measurement spectrum obtained for each predetermined point position; and determining at least one of a shape, a size, an energy distribution, and a center of the light spot to be measured based on a plurality of film thickness spectrum goodness of fits originating from the plurality of predetermined point positions.

This application provides a soft flash structure and a mobile phone. The soft flash structure includes a soft light, a soft lens, and a light shield. The curved reflective lens section has an incident curved surface and a reflecting curved surface on opposite sides, both curved away from the planar lens section. The planar lens section has a reflecting plane on opposite sides, and the condensing lens section has a condensing reflecting surface and a light emitting surface on opposite sides. The incident curved surface, one reflecting plane, and the condensing reflecting surface are connected sequentially, as are the reflecting curved surface, the other reflecting plane, and the light emitting surface. The soft light, the curved reflective lens section, the planar lens section, and the condensing lens section are housed together within the light shield. The light emitted by the soft light is at least partially incident on the incident curved surface and reflected sequentially by the reflecting surface, the two reflecting planes, and the condensing reflecting surface, before exiting through the light emitting surface. The aforementioned soft flash structure can form a gradually softened light spot with better light uniformity.

This invention discloses a robust method, device, and storage medium for laser spot recognition and tracking in complex lighting environments, belonging to the field of computer vision and target detection. Addressing the problems of high false alarm rates and poor robustness in existing methods under interference such as strong ambient light, dynamic projector flicker, and specular reflection, this invention proposes a multi-layered processing framework of "detection-verification-tracking." First, adaptive threshold segmentation is performed on the current frame image to extract candidate regions with brightness higher than the background. Second, multi-dimensional feature verification is introduced. Based on the inherent physical properties of the laser spot (such as spectral matching degree, shape and size, and two-dimensional Gaussian intensity distribution) and temporal motion patterns, candidate regions are jointly verified and filtered to effectively remove various homogeneous and heterogeneous interferences. Finally, through a multi-target trajectory management module, the filtered candidate spots are correlated with historical trajectories (e.g., using the Hungarian algorithm), and combined with Kalman filter prediction and state machine-based trajectory lifecycle management (temporary, confirmed, lost, terminated), stable tracking and output of the laser spot are achieved. This invention does not rely on a large amount of training data, has high computational efficiency, and can significantly improve the accuracy and robustness of laser spot recognition under complex dynamic lighting conditions, providing a reliable front-end perception guarantee for vision-based high-precision laser spatial positioning and interaction systems.

The utility model relates to electronic equipment technical field provides a kind of dictionary pen.According to the dictionary pen presented in the present application, the body of pen is provided with scanning window;Scanning assembly is arranged in the body of pen, scanning assembly includes camera and light supplement lamp, camera is used to shoot the text content framed by scanning window, light supplement lamp is arranged at the side of camera, the length of light supplement lamp is not less than the length of the camera, light supplement lamp is used to provide linear optical field for camera.According to the dictionary pen of the embodiment of the present application, the length of the light supplement lamp is not less than the length of the camera, which ensures that the light supplement range can completely cover the widest range that the camera can see, effectively avoids the reflection and light spot caused by lateral light, greatly improves the uniformity of the captured image, thereby improving the image quality and improving the recognition accuracy.

The application provides an illumination device for fundus observation, comprising a contact lens, a light guide plate and an illumination light source; the contact lens is provided with an arc-shaped side and a light-in side, the arc-shaped side is used for adhering to the cornea; the light-in side is provided with the light guide plate; the light guide plate is provided with a light inlet and a light outlet; the incident light of the illumination light source is incident into the light guide plate through the light inlet, the light guide plate reflects the incident light and the reflected light is incident into the contact lens through the light outlet; the incident light passes through the arc-shaped side of the contact lens and the cornea and is incident into the eyeball to illuminate the fundus. The illumination device for fundus observation of the application sets the illumination light source on the side of the contact lens and limits and adjusts the angle of the light incident into the eyeball through the light guide plate, so that the number of the light incident into the fundus is increased, and the contact fundus imaging device can form clear and accurate fundus imaging while reducing the traditional light spot interference.

This application relates to the field of lasers and discloses a reflector module, a synchrotron radiation device, and a free-electron laser device. The module includes a mirror body, a cooling component, and a heating component. The cooling component is connected to the mirror body and disposed on a first surface, used to reduce the temperature of the reflecting surface. The heating component is connected to the cooling component and used to compensate for the temperature of the reflecting surface. The heating component includes a heat-conducting block and a heating plate. This application utilizes a heat-conducting block connected to the cooling component and protruding from the reflecting surface along a third direction. A heating plate is disposed on the surface of the heat-conducting block facing the mirror body along a second direction. The heating component provides localized temperature compensation for the reflecting surface, which, combined with the uniform cooling of the cooling component, effectively reduces the localized high thermal gradient and non-uniform thermal expansion deformation of the reflecting surface caused by changes in the beam position.

The application discloses an optical device, a laser lighting device and a vehicle, and belongs to the technical field of lasers, and comprises a fluorescent powder sheet, a reflector and a lens; the fluorescent powder sheet, the reflector and the lens are coaxially arranged along a transmission direction of a laser beam; a side of the lens facing the fluorescent powder sheet is provided with a groove, the reflector is arranged at the bottom of the groove, and the fluorescent powder sheet is arranged at a notch position of the groove; the direction of a light-receiving surface of the fluorescent powder sheet and the direction of a light-reflecting surface of the reflector are opposite to the transmission direction of the laser beam; the fluorescent powder sheet is used for emitting excited light under irradiation of the laser beam; the reflector is used for reflecting the laser beam or the excited light through the light-reflecting surface; and the lens is used for changing the direction of the excited light to form a high-beam lighting spot or a low-beam lighting spot. When the fluorescent powder sheet is broken or falls off, the laser beam is directly irradiated on the light-reflecting surface of the reflector, direct irradiation of the laser beam out of the lens to cause harm to human eyes can be avoided, and the use safety of the optical device is improved.

This application discloses a carbon-free laser processing system and method for metal rings. The method comprises, arranged sequentially along the optical path: a laser for emitting a first femtosecond laser beam, the first femtosecond laser beam being linearly polarized light; a beam expander for expanding the first femtosecond laser beam; a polarization control element for adjusting the polarization state distribution of the expanded first femtosecond laser beam to form a second femtosecond laser beam; a beam adjustment module for changing the transmission direction of the second femtosecond laser beam and adjusting its angle to form a third femtosecond laser beam; and a focusing module for focusing the third femtosecond laser beam to obtain a focal spot, allowing the focal spot to directly act on the metal ring for processing. This improves the processing quality, efficiency, and product quality of the metal ring, while reducing the product loss rate during processing.

The application belongs to the technical field of inertial confinement fusion measurement, and relates to a traveling wave split-frame camera time characteristic calibration method, device, equipment and medium, which comprises the following steps: splitting a pulse laser into a first light beam and a second light beam; acquiring a first light spot image of a microstrip under a direct current voltage, and a second light spot image corresponding to the second light beam when a split-frame camera is driven by a gating pulse and is synchronized with the pulse laser; based on the first light spot image, the gray scale distribution of a strip-shaped light spot in the second light spot image is respectively subjected to spatial light intensity correction; according to the gray scale peak position of the strip-shaped light spot in the corrected second light spot image, the transmission speed of the gating pulse on the microstrip is calculated, and a gain attenuation curve of the split-frame camera is fitted; the gray scale distribution of the strip-shaped light spot in the second light spot image is subjected to gain attenuation correction by using the gain attenuation curve, and the exposure time of the split-frame camera is calculated in combination with the transmission speed and the pixel size. The purpose is to improve the calibration precision and efficiency of the time characteristics of the split-frame camera.

This invention proposes a device and method for suppressing zero-order diffraction spots of a spatial light modulator based on a coaxial optical system. The device comprises a laser coupler, a spatial light modulator, a movable coaxial optical system, and a subsequent imaging system, all coaxially connected via a cage-like fixing assembly. The coaxial optical system includes a first lens, a blocking assembly, and a second lens. The method includes the following steps: S1, a laser source is coupled through the laser coupler and then incident on the spatial light modulator for phase modulation, forming a composite reflected beam containing modulated and unmodulated light; S2, the composite reflected beam is introduced into the coaxial optical system for filtering; S3, the filtered beam is output to the subsequent imaging system to obtain a holographic image with suppressed bright spots. In this application, no modifications to the hardware structure of the spatial light modulator or the holographic algorithm are required. Zero-order diffraction suppression can be achieved by introducing a combination of focal plane separation and anti-pinhole blocking in the optical path, resulting in a simple and easy-to-implement structure.

This invention discloses a method, apparatus, and related equipment for detecting defects in inkjet-printed OLED dry film, belonging to the field of optoelectronic information engineering. The method uses a laser with a spot size smaller than the pixel slot to irradiate the OLED panel. A detector array consisting of multiple sub-units receives the reflected and scattered light generated after irradiation. Then, the photocurrent intensity of each sub-unit is acquired. The photocurrent intensity of the sub-unit corresponding to the reflection center at the current moment is compared with that at the previous moment. When the change exceeds a first preset range, abnormal sub-units are identified based on their photocurrent intensity. Based on the number, location distribution, and photocurrent intensity of the abnormal sub-units, defects are eliminated or the defect type is determined. This method improves detection efficiency in industrial production scenarios without occupying production time, can be integrated with production cycles, and does not require additional large-scale evaporation or testing equipment. It is an excellent method for improving the overall yield of inkjet-printed OLED panels.

The application discloses a molten silicon liquid level estimation method based on a hybrid adaptive resampling particle filter, and comprises the following steps: firstly, processing laser spot images collected by a CCD sensor to obtain observation data of the liquid level; then, establishing a system state equation of the molten silicon liquid level according to a kinematic principle to describe the movement of the liquid level; performing state estimation on a laser centroid vertical coordinate by using a particle filter algorithm, and obtaining a new particle set by using a hybrid adaptive resampling method; after re-normalizing all particle weights, outputting an optimal estimation value; and finally, smoothing the filtered data by using a moving weighted average method, and the smoothed result is the estimation value of the molten silicon liquid level. The application solves the problem that in the prior art, the variance of Gaussian variation is too large, particles jump out of a sampling range, and it is difficult to accurately estimate a real liquid level.

The present application relates to a kind of Hartmann wavefront measurement dynamic range extension method based on quadratic phase control, belong to wavefront measurement technical field.For the problem that the measurable slope interval is limited in the limited detection displacement range in traditional Hartmann wavefront measurement, at least the sub-aperture phase distribution containing reference focusing phase and quadratic phase term is constructed in super surface phase control, and the displacement of each sub-aperture corresponding light spot on the detection surface and the local average slope of the sub-aperture satisfy the preset monotone reversible nonlinear mapping relationship in design working interval by combining theoretical modeling, numerical optimization and / or experimental calibration.The present application can reconstruct the slope-displacement encoding rule of traditional Hartmann under the premise of keeping local average slope reversible and wavefront reconstructable, extend the encodable slope range in given displacement range, so as to improve the dynamic range of Hartmann wavefront measurement, especially suitable for the measurement scene of strong non-uniform, large dynamic range wavefront.

The application discloses a laser and target debugging device with self-reference light and a debugging method thereof. The application comprises a seed source, a stretcher, a first amplifier, a first pump source, a menu system, a second amplifier, a second pump source, a compressor, a reference light loop, a reference light switch and a three-phase switch. The application does not need to place reference light externally, is more economical, and has the same quality of the main laser beam, including the same spot size, divergence angle and wavelength, which can accurately replace the original laser for subsequent target system debugging, and the debugging result is equivalent to that of the main laser. The addition of the reference light switch increases the use safety and avoids accidents caused by misoperation. The mKHz laser has high frequency, is beneficial to the observation of the human eye, and is very convenient for subsequent adjustment as the self-reference light.

This invention relates to the field of electronic display technology, and more particularly to an online self-calibration system for the brightness and color of display backlight zones based on optical feedback. The system includes an acquisition module, a judgment module, a light and color calibration module, a determination module, a control calibration module, a prompting module, and an adjustment module. This invention acquires multi-dimensional parameters, synthesizes dynamic interference intensity based on tilt angle, spot illuminance, and infrared transmittance, and compares it with a preset threshold to determine the presence of interference. When interference is detected, the system compensates for the measured brightness and color temperature using the dynamic interference intensity and infrared transmittance, outputting a calibration value reflecting the true light-emitting state of the backlight. It adjusts the backlight drive current and PWM duty cycle through a collaborative calibration factor. Simultaneously, when performance degradation reaches a preset condition, a prompt is issued and the interference threshold is dynamically adjusted. This effectively solves the problems of low calibration accuracy and poor cross-screen consistency caused by the inability to distinguish between environmental interference and backlight aging, and the lack of multi-screen collaboration.

The application relates to a high-precision optical alignment assembly method of a scanning mirror, and belongs to the technical field of laser radar manufacturing equipment, and solves the technical problems of insufficient precision, no compensation for glue shrinkage, low efficiency and high cost of special equipment in the existing scanning mirror assembly. Based on the light reflection principle, the method characterizes the included angle between the scanning mirror and the motor shaft through light path amplification offset, constructs an optical alignment system by using point laser, mirror group and scale receiving plate, completes coarse adjustment and fine adjustment by cooperating with the scanning mirror adjustment jig, makes the positions of the laser spots on the scale receiving plate coincide after the motor rotates 180 degrees, and then completes UV glue curing through the light curing device, and realizes high-precision assembly by combining the glue shrinkage compensation mechanism and the quantitative verification standard. Through the optical alignment method of light path amplification offset, the quantitative adjustment, the verification standard and the glue shrinkage compensation mechanism are combined, high-precision assembly of the scanning mirror and the motor shaft is realized, the glue shrinkage preset offset compensation scheme is established, and the angle offset problem of UV glue curing shrinkage is avoided.

This invention belongs to the field of laser additive manufacturing technology, specifically relating to a dual-spot parallel scanning additive manufacturing system and method. A laser generation unit dynamically distributes a laser beam to the first and second optical paths according to a preset energy ratio through polarization beam splitting. The spot generation unit uses two spatial light modulators to modulate the two beams into patterned spots and dot spots respectively. The filtering and imaging unit filters and images the two beams. The parallel scanning unit drives the dual spots to scan synchronously on a powder bed. The control unit performs model slicing and patterned region segmentation, and dynamically allocates energy and synchronously controls all units to work together based on the segmentation results. This achieves a single laser, dual optical paths, irregularly shaped spots, and parallel scanning, simultaneously balancing processing efficiency and forming accuracy, effectively solving the technical problem of traditional single-spot methods that struggle to achieve both efficiency and accuracy.

The application belongs to the technical field of optics, and particularly relates to a condenser lens, a lamp and a condenser lens module. The condenser lens comprises, in sequence along the optical axis direction, an incident part for receiving and refracting light from a light source, a converging part for totally reflecting and converging the light refracted by the incident part, and an exit part for homogenizing and exiting the light converged by the converging part. The condenser lens is configured to make the difference between the beam angles of the light of different wavelengths after exiting be less than + / - 3 degrees. The application can make the light beams of different spectrums generated after passing through the same condenser lens have a small difference in exiting angle, solve the color layering problem of the light spot when the multi-color light sources are mixed, realize uniform light mixing, and only one set of condenser lens mold needs to be developed, thereby reducing the manufacturing cost.

This invention relates to a method for assembling and adjusting a holographic concave grating monochromator, belonging to the field of optical instrument assembly and adjustment technology. It solves the problems of existing monochromator assembly and adjustment methods being cumbersome, time-consuming, labor-intensive, or having high theoretical requirements and low efficiency. The method involves leveling the holographic concave grating monochromator and laser; recording the initial spot height of the laser; directing the laser perpendicularly to the entrance slit of the monochromator to the center of the grating; measuring and recording the heights of the 0th and ±1st order diffraction spots; plotting the trajectories of the multi-order spectral spots; adjusting the pitch and / or tilt angle of the grating according to the trajectory until the center of each diffraction spot is collinear with the initial spot height; rotating the grating to allow the 0th order light to exit from the exit slit; using a right-angle fixture to adjust the grating shaft lever to be perpendicular to the drive screw and locking it; placing an external light source at the entrance slit; observing the clarity of the spectral lines at the exit slit using a microscope; and adjusting the thickness of the shim at the exit slit to achieve precise conjugate matching between the entrance and exit slits. This invention is simple to operate, quick to assemble and adjust, and highly accurate.

An autofocus system and an autofocus method. The autofocus system comprises: a primary inspection microscope module (20), a defocus information measurement module (10), a main control module (30), and a drive motor module (40). The defocus information measurement module (10) comprises an adjustable array light source (1011) configured to adjust a light-emitting region on the basis of a preset condition. Measurement light emitted from the light-emitting region sequentially passes through a second beam-splitter prism (102) and a first beam-splitter prism (202), and is then projected by a microscope objective lens (203) to each of sub-regions to be inspected, generating reflected light; the reflected light sequentially passes through the first beam-splitter prism (202) and the second beam-splitter prism (102), forming a pair of light spots on the defocus information measurement module (10) and corresponding to each of said sub-regions; and on the basis of light spot information of each pair of light spots, the main control module (30) instructs the drive motor module (40) to drive the primary inspection microscope module (20), so as to sequentially focus on each of said sub-regions and to capture an image of each of said sub-regions after focusing is completed. On the basis of the autofocus system and the autofocus method, focusing efficiency can be improved.

This invention discloses a dynamically adjustable forest gap simulation device, belonging to the technical field of ecological experimental equipment. The device includes a supporting column, a supporting frame, a driving component, a shading component, and an intelligent control unit. The supporting column is a multi-stage telescopic structure equipped with a field anchoring mechanism. The supporting frame consists of a central connecting part and multiple radially telescopic and foldable radial arm-shaped components. The shading component is laid on the arm-shaped components to form a variable shading area. The driving component drives the arm-shaped components to extend and retract. The intelligent control unit uses off-grid photovoltaic power and can adaptively control the movement of the arm-shaped components according to preset strategies, light intensity, and wind speed parameters, realizing dynamic forest gap simulation and dynamic restoration of wind-disturbed light spots. This invention features high modularity, accurate simulation, stable structure, and suitability for long-term unattended field experiments, effectively solving the technical problems of traditional forest gap simulation devices, such as static fixation, poor dynamic effects, low intelligence level, and insufficient field adaptability.

The invention relates to the technical field of laser communication, and discloses an arbitrary wavelength tracking device and method for laser communication, and the method comprises the steps: receiving a spatial light signal through a receiving and transmitting assembly, and dividing a part of the spatial light signal into a tracking light beam; diffracting the tracking light beam by using a tracking assembly to generate light spots of optical signals with different wavelengths; and according to the position information corresponding to the optical signals with different wavelengths, wavelength information of the optical signals contained in the spatial optical signals is identified and obtained. According to the device and the method provided by the invention, diffraction spots at different positions are generated by optical signals with different wavelengths based on the diffraction effect so as to obtain corresponding wavelength information, so that space optical signals with any wavelength are tracked, and the device and the method provided by the invention do not have the problem of tracking wavelength omission, and are suitable for inter-satellite networking scenes.

This invention proposes a complex optical system based on deep feature decoupling and an autonomous alignment and diagnostic method. The system includes a resonant cavity support system, a spot data acquisition system, and a preprocessing system. The method includes acquiring transmitted and reflected spot data from an F-P resonant cavity to construct a training dataset; preprocessing the training dataset to generate an average intensity projection feature map; inputting the average intensity projection feature map into a neural network feature decoupling and inference model to derive multi-degree-of-freedom adjustment parameters, achieving a fundamental mode purity of a first preset threshold; switching to an orthogonal serialized one-dimensional linear scanning fine-tuning mode, optimizing and locking extreme points dimension by dimension, achieving a fundamental mode purity of a second preset threshold, and completing closed-loop alignment; based on the adjustment data and principal component analysis, decoupling the system's sensitive dimensions, and outputting the optical system's sensitivity diagnostic results. This invention can diagnose the most sensitive and easily imbalanced key parts of the system, providing theoretical guidance for subsequent system maintenance and adjustment.

This utility model discloses an online cover inspection scraper for filter cloth production lines, relating to the field of filter cloth production technology. It includes a support frame with a limiting seat mounted on its upper end. A mounting seat is mounted in the middle of the limiting seat, and a mounting groove is provided at the lower end of the mounting seat. The scraper is slidably connected to the mounting groove. Several bolts for fixing the scraper are provided on the mounting seat. The support frame is mounted on the upper end of a vehicle frame. Two rotating rollers are located inside the vehicle frame, on which filter cloth raw material is wound. A feeding plate is provided on the side of the rotating rollers. A dryer is located at the upper end of the vehicle frame. A laser beam is emitted onto the surface of the filter cloth by a laser emitter, and the reflected light spot is captured by a CCD camera. When there is coating on the filter cloth, the laser beam deflects, and the displacement light spot is captured by the CCD camera. The thickness is calculated using a pre-calibrated geometric model. It has the advantages of being non-contact and having high detection accuracy, and has a wide range of applications.

This invention discloses an eye feature detection and light source matching method based on an event camera, belonging to the field of eye-tracking detection. The method includes first placing an event camera and a ring-shaped light source assembly in front of the eye being tested, controlling the ring-shaped light source assembly to switch from off to on, and simultaneously acquiring event stream data generated by brightness changes in the eye area through the event camera; constructing a global grayscale image and a light spot grayscale image based on the event stream data, then coarsely locating the pupil contour and extracting candidate corneal reflective spots; then obtaining the precise pupil contour and pupil center position based on the candidate corneal reflective spots; finally, based on a preset light spot geometric distribution model, eliminating abnormal spots among the candidate corneal reflective spots, and identifying the correspondence between each remaining candidate corneal reflective spot and the light source in the ring-shaped light source assembly. This invention achieves pupil and corneal reflective spot detection and light source matching based on event data, providing structured feature input for subsequent eye tracking and gaze direction estimation.

This utility model discloses a heliostat surface shape inspection device, relating to the field of solar thermal power generation technology. The device includes a support assembly, a moving guide rail, a first inspection assembly, and a second inspection assembly. The moving guide rail connects to the support assembly, and the first and second inspection assemblies are movably mounted on the guide rail. By placing the heliostat within the support assembly, the first and second inspection assemblies respectively inspect the surface shape of the heliostat. During the inspection process, the first inspection assembly performs a comprehensive surface shape inspection of the heliostat, quickly determining whether there are any problems with the surface shape, such as issues in a specific area. Simultaneously, the surface shape of the heliostat affects the size and shape of the light spot. After adjustments to the sub-mirrors, the second inspection assembly can immediately and quickly inspect specific areas of the sub-mirrors to verify whether the light spot has been improved.