159 results about "Point light source" patented technology

The invention relates to a structured light illumination confocal super-resolution measurement system and method, and relates to the technical field of optical measurement. The system comprises a digital micromirror device (DMD), a sample platform, an electric displacement platform, a microscopic imaging assembly, a complementary metal oxide semiconductor (CMOS) imaging assembly and computer equipment, and the DMD is used for adjusting the point light source array and the structured light field. According to the DMD-based confocal super-resolution measurement method, a structured light field and a signal-noise separation technology are combined, and high-precision and high-resolution three-dimensional surface reconstruction can be realized. By using the flexibility of the DMD and the advantages of the super-resolution technology, the spatial resolution and speed of confocal imaging are effectively improved, so that the measurement process is more accurate. In addition, low-rank decomposition and self-supervised deep learning methods are fused, the image reconstruction process is optimized, noise interference is suppressed, and the overall performance of the system is further improved.

The invention provides a visual tactile sensor, a geometric calibration method and computer equipment, and the visual tactile sensor comprises a base which is internally provided with an imaging unit; the light source module is arranged on the base and comprises 3N single-point light sources which are arranged around the imaging unit and can be independently controlled, and N is larger than or equal to 1; and the elastic housing is arranged on the base in a covering manner, and the imaging unit and the light source module are wrapped in the elastic housing. By constructing the novel curved surface visual tactile sensor and the matched geometric calibration method thereof, the problems that a traditional plane sensor is weak in multi-direction contact sensing capacity, difficult in curved surface calibration and the like are effectively solved, data generated by a physical model are used for training a lightweight neural network, and the accuracy of the curved surface visual tactile sensor is improved. Real-time surface normal prediction under single-frame three-color image input is realized, and the precision and reasoning speed of three-dimensional reconstruction are considered while hardware dependence and calibration cost are remarkably reduced.

The invention discloses a near BBL curve LED white light color mixing method, system and lamp, a first color temperature light source and a second color temperature light source are selected in a preset color coordinate area, and a color point range is determined for each of the first color temperature light source and the second color temperature light source based on calculation of an intermediate color temperature point light source color deviation value extreme value on a target light mixing path; and selecting the first color temperature light source and the second color temperature light source of which the color coordinates are located in the corresponding color point range, and adjusting the luminous flux output proportion of the two light sources for light mixing so as to form intermediate color temperature light. The problems that a multi-CCT light and color modulation product adopts two light sources, the color temperature and color tolerance between the two light sources cannot meet the requirements of customers, and the color deviation value of the light sources obviously deviates from a BBL curve are solved.

The invention belongs to the technical field of photoelectric displacement precision measurement, and particularly provides a cylindrical grating scribed line error detection method and system. The method comprises the following steps: firstly, calibrating a cylindrical grating positioning error through two angles, then collecting gray scale data of the cylindrical grating at different measurement angles according to a point light source and a linear array image sensor to calculate a non-coaxial error, and finally removing the non-coaxial error from the positioning error to realize the detection of the scribing error. According to the invention, interference of non-coaxial errors in a scribed line error detection process can be effectively suppressed, the inherent precision of cylindrical grating displacement measurement is effectively improved, and the method is suitable for industrial, aerospace and other scenes with high precision requirements.

The invention relates to an edge enhancement imaging system. The system comprises a point light source; the object side polarization filtering unit is arranged on the light emitting side of the point light source and modulates the light into specific polarized light to irradiate a sample; the imaging unit is arranged on the light emitting side of the object side polarization filtering unit and is used for transmitting the input light field to an imaging surface; the spatial variable polarization modulation element is arranged on a conjugate surface of the point light source relative to the imaging unit and is used for performing spatial variable polarization modulation to obtain a modulated light field; and the image space polarization filtering unit is arranged between the space variable polarization modulation element and the imaging surface and is used for screening the modulated light field to obtain a light field in a specific polarization direction, and the light field in the specific polarization direction forms an edge enhanced imaging light field on the imaging surface. The invention also relates to a preparation method of the edge enhancement imaging system. The device has the advantages that the imaging effect of edge enhancement in any direction or all directions is achieved, a common microscope imaging system can be compatible, phase modulation is achieved through polarization state transformation, and sensitivity to wavelength is reduced.

The invention relates to the technical field of vehicle-mounted equipment testing devices, and discloses a method and a device for batch testing of imaging quality of vehicle-mounted multi-type cameras, a plurality of to-be-tested camera modules are assembled on a six-degree-of-freedom adjustable clamping platform, and the platform is provided with a plurality of groups of clamping bases capable of three-dimensionally rotating and radially moving; a preset cross graph card is arranged in front of the platform, four vertical point light sources are uniformly distributed on the cross graph card, and an auxiliary camera module is arranged on the central axis; turning on the light source and the camera module, resetting the cross graph card, assisting the camera module to shoot and analyze whether the point light source coincides with the marked line or not, and adjusting the posture if the point light source does not coincide with the marked line; after superposition, moving the clamping base, testing whether the shooting center of the to-be-tested camera module coincides with the center of the graphic card, and if not, adjusting the clamping posture; the rest modules are tested in sequence, and finally the graphic card is removed for follow-up testing; the technical problem that the efficiency is low due to the fact that a split type independent testing method is adopted for multiple types of camera modules in the prior art is solved.

The application provides a multi-channel imaging optical eccentricity correction method applied to a multi-channel camera, and the optical eccentricity correction method comprises the following steps: real-time shooting of the inside of an integrating sphere by the multi-channel camera; adjusting the position of each lens relative to the lens chip to make the brightness of the four corners of the video display page of the multi-channel camera consistent; simultaneously shooting an infinite faraway same point light source by N lenses of the multi-channel camera, so that the video display page of the multi-channel camera simultaneously displays N shooting pictures, and the point light source is displayed on each shooting picture; and taking the image plane position of the point light source in one of the shooting pictures as a reference, adjusting the image plane positions of the point light sources in other shooting pictures to be the same as the reference. The multi-channel imaging optical eccentricity correction method can reduce the relative eccentricity degree of the lens and the chip, improve the common field of view of the multi-channel camera, and improve the shooting efficiency.

The invention discloses a method for calculating large-area displayable graphic and text information under a point light source. The method comprises the following steps: S1, digitizing the graphic and text information; s2, point light source parameter modeling; s3, carrying out basic modeling on the microscopic fringes; s4, stripe width correction is carried out in combination with an image-text information model; and S5, carrying out block calculation and splicing on the large-area region. By digitally processing the graphic and text information, the complex graphic and text can be converted into an accurate pixel matrix, a clear data basis is provided for subsequent calculation, and the accuracy of the graphic and text information at a processing source is ensured; point light source parameter modeling is carried out, the position, illumination intensity and other key parameters of a point light source can be accurately captured, a reliable optical basis is provided for subsequent microcosmic fringe design, and calculation deviation caused by fuzzy light source parameters is avoided. And a brand new microscopic stripe basic model is constructed, so that stripe distribution can more flexibly adapt to point light source characteristics and graphic and text information requirements.

According to the multi-light-spot light source system for detector adjustment and the generation device, a plurality of light sources are arranged and controlled through a multi-light-spot light source array, and the spatial distribution of a light field can be flexibly adjusted. A target plate and a spacing adjusting mechanism are arranged at the front end of the system, so that the center and four angular points of a light-sensitive surface of the detector can be imaged in the precise adjustment process of the optical system detector. By synchronously acquiring the change information of the imaging light spots at the five key positions in the assembling and adjusting process, the deviation between the current position and the ideal position of the detector is effectively confirmed, multi-view-field synchronous adjustment is realized, and the assembling and adjusting efficiency of the detector is remarkably improved.

The present application relates to computer vision and three-dimensional reconstruction technical field, disclose a kind of based on image recognition's building decoration component three-dimensional modeling method, method includes the following steps: receiving near-axis active illumination image sequence, solving camera pose and equivalent point light source trajectory;Inverse projection two-dimensional foreground mask generates maximum base envelope grid;Combining brightness gradient and texture high-frequency edge tensor field removes false shadow, extract effective sweep shadow mask;Tracking shadow residual optical flow displacement and combining light source trajectory analysis absolute depth, generate local three-dimensional point cloud;Surface reconstruction is executed to point cloud and opening plugging constructs negative space primitive entity grid;Extract the Laplace curvature energy of interface to generate normal shrinkage constraint, control entity grid after shrinkage and envelope grid execute Boolean difference set operation output model.The present application extracts absolute depth in featureless recessed area, and eliminates the boundary interference and distortion of grid Boolean operation.

This invention relates to the field of precision alignment technology, specifically to an astigmatic differential confocal alignment system and method capable of synchronous imaging. The astigmatic differential confocal alignment system includes: an astigmatic differential confocal optical path system and an imaging optical path system sharing the same objective lens; the astigmatic differential confocal optical path system includes a laser, a collimating and expanding beam system, a polarizing beam splitter cube, a quarter-wave plate, a long-pass filter, a short-pass dichroic mirror, an objective lens, a non-polarizing beam splitter cube, a plano-convex cylindrical lens, and two four-quadrant photodetectors connected in sequence; the imaging optical path system includes a visible light point source, a beam splitter, a short-pass dichroic mirror, an objective lens, a sleeve lens, and a camera connected in sequence; the two optical path systems are coaxial and synchronized. When the defocus error signal FES crosses zero, the camera synchronously acquires a clear morphological image of the surface of the sample under test, achieving synchronization of alignment and imaging.

To achieve a good visual effect. [Solution] An image forming apparatus 1 creates a decorative medium MC1 by sequentially superimposing and printing a lower color toner image PNL, a silver toner image PS having a background area AB and a decorative area AC, a transparent toner image PC, and an upper color toner image PNU on the surface of a blank medium M. As a result, the decorative medium MC1 can reduce the rate at which a portion of light transmits from the back side of the medium M compared to when the lower color toner image PNL is omitted, making the decorative area AC less visible. This allows the image forming apparatus 1 to create a good visual effect in which the decorative area AC appears and disappears on the surface of the decorative medium MC1 when the relative positions and angles of the observer's viewpoint VP, light source LS, and decorative medium MC1 are changed in various ways.

The invention relates to a method for solving undersampling in a point spread function test process of an optical imaging system. The method comprises the following steps: acquiring a plurality of undersampling star point images with micro-displacement; calculating centroid coordinates of star points in each under-sampling star point image; registering the plurality of point light source defocused spot images according to the centroid position to generate a high-resolution point light source defocused spot reconstructed image; and reconstructing an image fitting point spread function according to the high-resolution point light source defocused spot. According to the under-sampling solution in the testing process of the point spread function of the optical imaging system, a brand-new image registration model containing factors such as the pixel overlapping ratio, the weight coefficient and the flat field coefficient is provided, the authenticity of gray level distribution of a registration image is improved, the testing precision of the point spread function of the optical imaging system is further improved, and the testing accuracy of the point spread function of the optical imaging system is improved. The problem of undersampling in the point spread function test process of the optical imaging system is solved.

The invention discloses a method for judging a focal length. The method comprises the following steps of: 1, preliminarily judging a focal position by adopting point light source imaging; 2, finely judging a focus position by adopting a collimated light source; step 3, obtaining a gray value of an imaging point; step 4, obtaining a gray value of the imaging point; 5, drawing an imaging point gray average value function and an imaging point gray variance function, and drawing a position relation with the sample on the same horizontal coordinate; and selecting peak values of the gray average value function and the gray variance function, selecting the two peak values to correspond to the middle of the position of the sample, and judging the position as a focus. According to the method, the specific error of a single evaluation function is eliminated or reduced, the accuracy of focus position judgment is improved, the focus position is judged by combining the focal plane pixel point gray variance and the focal plane pixel point gray average value function, and the actual use requirement is met.

The application belongs to the technical field of positioning and measurement, and particularly relates to a target positioning method and device combining CSI coarse positioning and Y-type CCD fine correction, which comprises the following steps: S1, CSI acquisition equipment is arranged in a target area, and CSI data between a sending end and a receiving end is acquired; S2, a Y-type CCD sensor is geometrically calibrated and a coordinate system is corrected, and coordinate reconstruction is completed; S3, the CSI data is preprocessed, noise is removed, and input is normalized; S4, time domain features of the CSI are extracted by using a time domain branch; S5, frequency domain features of the CSI are extracted by using a frequency domain branch; S6, a gating fusion module is used to fuse the time domain and frequency domain features, and the approximate position coordinates of a target are output; S7, the Y-type CCD sensor is controlled to optically acquire a target area, and point light source coordinate information is acquired; and S8, error correction is performed on the data acquired by the Y-type CCD, and the accurate position coordinates of the target are output.

This invention discloses a closed-loop optical architecture for suppressing stray light at the source of a light source, relating to the field of lighting optics design technology. The invention includes a light-emitting source and a mounting substrate, with an enclosing structure matched to the outer periphery near the light source. A continuous light-absorbing surface is formed on the inner side of the enclosing structure, corresponding to the lateral stray light overflow path of the light source, used to constrain lateral diffuse light and stray light overflow. A forward light-emitting opening is reserved at the top of the enclosing structure to avoid obstruction of the main axial light path of the light source and maintain the integrity of the forward light-emitting path. The enclosing structure adopts a double-layer composite structure, realizing lateral light absorption and structural shaping functions respectively, and can adapt to various light source arrangements such as point light sources, linear strip light sources, and multi-light source combination modules. This invention, through the bottom-layer optical path structure design of near-end enclosing light control, achieves source suppression of stray light and glare without attenuating forward light emission.

The invention belongs to the technical field of optical lenses, and particularly relates to a discrete point source bus set envelope fitting and optimization design method for expanding a light source to realize uniform illumination. Dispersing the expansion source into point light sources, and obtaining a cluster bus set based on an accurate mathematical model of the point light sources; according to an envelope principle, selecting an outmost contour including all features as much as possible, and fitting the outmost contour by using a polynomial under a polar coordinate system to serve as an initial generatrix of the light distribution lens; a root mean square error of an irradiance distribution numerical value obtained by running a two-dimensional ray tracing program is used as an evaluation index to optimize and fit various coefficients of a polynomial, finally, the lens suitable for achieving uniform illumination through extended source light distribution is obtained, and the problem that mathematical modeling of an extended source light distribution light path is difficult is solved; through verification, the performance is good, the irradiation uniformity is gradually improved to 92.7% from 76.8% of an initial structure, the edge irradiance gradient is improved to 0.45 from the initial 0.27, and the edge dispersion problem is effectively weakened.

This invention provides a method for obstacle contour perception based on grating mesh in parking scenarios. A grating mesh is generated by a point light source and grating lenses and projected onto the area to be measured. Video data of the area to be measured is acquired using a monocular camera. The video data is preprocessed to obtain a grating map of the region of interest (ROI) of the obstacle. Grating picking is performed on the grating map of the ROI to extract grating mesh lines, and these lines are numbered. Feature points are then picked up, and 3D feature point reconstruction is completed. Based on the reconstructed 3D feature points, a normal-multiple clustering method is used to fit the facade, outlining the obstacle contour and achieving obstacle contour perception. Compared with existing technologies, this method can effectively improve the speed and accuracy of obstacle contour visual detection during parking, and enhance the adaptability of visual detection to the environment. It has the advantages of low cost, high accuracy, and ease of use.

The present application relates to a kind of based on periodic light-emitting plant and animal lighting system and method.The lighting system includes lighting board, image detection unit and control unit.Lighting board includes several adjacent spliced area light source and point light source arranged at the splicing node of area light source.Control unit is based on image analysis the growth state of the irradiated object, and sends the light-emitting instruction corresponding to growth state to lighting board.Lighting board is based on light-emitting instruction control the light-emitting mode of area light source and point light source.Area light source emits growth-promoting light that vertically irradiates the irradiated object in the manner of adapting the photoperiod of the current growth state of the irradiated object.Point light source can emit pest control light that obliquely irradiates the area near the irradiated object in rotatable manner.The present application can make the growth of seedling better while preventing pests, avoid the plant to grow obliquely due to the relative inclination of the location and light source, and thus improve the yield of seedling.

The invention relates to a focusing method and device, computer equipment, a chip and a chip module. The method comprises the following steps: carrying out image acquisition on a target scene at each lens position to obtain a first image of each lens position; for each first image, performing color space conversion on the first image to obtain a second image, and performing coding compression on the second image to obtain a coded image; the data volume of the coded image is used as a focusing value; and determining a target focusing numerical value meeting the focusing condition, and taking the lens position corresponding to the target focusing numerical value as the focusing position of the target scene. As the coding compression process is more sensitive to the compactness of global information included in the second image, and rich details included in the clearer second image can cause the coded image to have a higher data volume, the focusing value can more stably and accurately reflect the overall definition change trend of the second image, and the image quality is improved. Therefore, the stability and the success rate of automatic focusing in scenes of point light sources, high contrast and the like are remarkably improved.

Disclosed in the present application are an imaging method, an imaging apparatus (300), a head-mounted display (100), and a storage medium. The method comprises: by means of a mask, modulating the phases of spherical waves emitted by point light sources, so as to change propagation parameters of the spherical waves, the propagation parameters comprising at least one of the phases and the amplitudes, the parameters of the spherical waves at different depths modulated by the mask being different from each other, and a photographed scene containing a plurality of point light sources; on the basis of the spherical waves of which the propagation parameters have been changed, generating a grayscale image; and, on the basis of a preset high-dimensional reconstruction model, high-dimensionally reconstructing the grayscale image, so as to generate a high-dimensional image containing depth information.

The invention discloses a dispersion objective lens with a numerical aperture of 0.75. The dispersion objective lens comprises a triplet lens, three doublet lenses and three single lenses which are coaxially arranged, and after a continuous spectrum point light source passes through the dispersion objective lens, light with different wavelengths realizes differential convergence on an optical axis; a dispersion curve is fitted through a quadratic function, a small amount of dispersion linearity is sacrificed, better balance of an axial dispersion range and imaging quality is realized, and double targets of large dispersion range and high-quality imaging are achieved. The device has the advantage of long object distance, is convenient for front-end light path adjustment, and can be flexibly applied to various measurement systems.

The point spread function calculation method and system provided in the present application construct an optical analysis model, obtain the image plane intersection point in the optical analysis model, obtain the intersection point of the lower edge light of the specified field of view of the optical analysis model and the last optical surface as the boundary of the tracing grid, establish ray tracing grid points, and perform reverse ray tracing based on the image plane intersection point and the grid point to obtain the pupil function. Compared with the traditional method that needs to find the entrance pupil boundary and involves complex logical processes, the present application will avoid the complex entrance pupil, exit pupil and their boundary determination process, and directly calculate the ray tracing boundary based on the surface aperture. The calculation process is closer to the real physical process, with low implementation complexity and good stability. Through reverse ray tracing, the calculation error introduced by Fourier grid distortion and the approximation error of the traditional Fraunhofer propagation method are avoided, and an accurate ideal point light source diffraction image, that is, the point spread function of the optical system, can be obtained in the image space.

The application belongs to the technical field of photoelectric displacement precision measurement, and particularly provides a cylindrical grating ruling error detection method and system; firstly, the positioning error of the cylindrical grating is calibrated through two angles, then the different-axis errors are calculated according to the gray data of the cylindrical grating collected by the point light source and the line array image sensor at different measurement angles, and finally the different-axis errors are eliminated from the positioning error to realize the detection of the ruling error; the application can effectively suppress the interference of the different-axis errors in the ruling error detection process, effectively improve the inherent precision of the cylindrical grating displacement measurement, and is suitable for high-precision industrial, aerospace and other scenes.

The invention belongs to the field of aero-engine fuel injection technology research, and particularly relates to a fuel jet combustion experiment system and method. The system comprises an experiment cabin, an optical observation system, an ammonia fuel jet mechanism and an ignition device, a visual observation window is arranged on the side wall of the experiment cabin body; the ammonia fuel jet mechanism comprises an ammonia supply mechanism and a transparent nozzle arranged in the experiment cabin body which are connected with each other; the optical observation system comprises a point light source, a slit, a concave lens, a filter and a high-speed camera which are sequentially arranged along an observation light path; a nozzle of the transparent nozzle and the visual observation window are arranged on the observation light path between the concave lens and the high-speed camera; the moving mechanism I can drive the filter to leave the observation light path, and the moving mechanism II drives the high-speed camera to leave the observation light path to directly shoot the transparent nozzle. The multi-dimensional research on the ammonia jet flow pattern, the flash boiling effect, the atomization characteristic and the combustion flame group distribution can be completed in sequence by one set of system.

The invention discloses an atomic fluorescence detection device and method, and the device comprises an atomic gas chamber which is used for spontaneously radiating atomic fluorescence rays; the reflecting device is used for reflecting the fluorescent rays, so that the fluorescent rays reflected by the reflecting device are converged to the spherical lens; the spherical lens is used for receiving the reflected fluorescent rays and increasing the convergence degree of the fluorescent rays reflected by the reflecting device; and the fluorescence detector is used for receiving and detecting the fluorescence rays. The atomic gas chamber has the advantages that the principle is clear, the structure is simple, and by adjusting the distance between the rectangular reflecting mirror in the reflecting device and the point light source at the central position of the atomic gas chamber and the distance between the first prismatic right-angle reflecting mirror and the point light source and the distance between the second prismatic right-angle reflecting mirror and the point light source in the vertical direction, the atomic gas chamber can be reflected; reflected fluorescent rays are converged to the spherical lens to the maximum extent, and the fluorescent ray detection efficiency is improved.

Methods and apparatus for specular surface mapping in which a camera detects reflections of a light source from a specular surface. The detected light sources may be projected onto a celestial sphere as virtual point sources. True positive observations should be tightly clustered on the celestial sphere; thus, false positives may be identified and removed. Specular surface information may then be determined from clusters of the virtual point sources on the celestial sphere. The clusters of virtual point sources on the celestial sphere may be identified and used to identify a surface as a specular surface. The clusters may also be used to extract other information regarding the specular surface, including but not limited to distance to and extent of the specular surface.

The application provides a liquid crystal panel edge optical detection device, which comprises two groups of detection units arranged along left-right symmetry, a channel space capable of allowing a detected panel to pass horizontally forward is arranged between the two groups of detection units; each group of detection units comprises a front surface camera, a front surface point light source, a back surface point light source and a back surface camera which are installed in a descending order of height, the lens of the front surface camera faces downward and is directly opposite to the upper side edge of the detected panel passing through the channel space, a back surface backlight source is further arranged above the front surface camera; the lens of the back surface camera faces upward and is directly opposite to the lower side edge of the detected panel 7 passing through the channel space, a front surface backlight source is further arranged below the back surface camera. The application is convenient to operate and improves the detection efficiency; the front surface point light source and the back surface point light source are used for light supplementing and brightening the surface of the product, the front surface backlight source and the back surface backlight source are used for brightening and shooting the background, the accuracy of image size measurement is improved, and it is easier to distinguish defects.

To highly accurately monitor an object to be monitored in a substrate processing device.SOLUTION: A substrate processing device (100) includes: a substrate processing unit (110) for processing a substrate (W); a light source (140) for irradiating an object to be monitored located inside or outside the substrate processing unit (110) with spot light; an imaging part (150) for generating image data by imaging an area including the object to be monitored irradiated with the spot light; and a control part (102) for monitoring the object to be monitored on the basis of the image data.SELECTED DRAWING: Figure 2

The invention provides a data acquisition method and device and a near-infrared brain function imaging system, and relates to the technical field of functional near-infrared spectral imaging. The data acquisition method comprises the following steps: in response to an externally input data acquisition request, performing encoding operation on a target modulation matrix to generate a plurality of modulation signals, so as to modulate first amplitudes of optical signals output by a plurality of point light sources by using a plurality of modulation signal sequences respectively; receiving electric signals sent by the detector, and determining second amplitudes corresponding to respective return light signals of the plurality of point light sources according to the received electric signals under the condition that the number M of the received electric signals is greater than or equal to N; and obtaining a data acquisition result according to the first amplitudes and the second amplitudes corresponding to the plurality of target point light sources.