57 results about "Geometrical optics" patented technology

The application provides a high-precision autocollimator based on the Tyman Green interference principle and an angle measuring method, aiming at solving the problem that the prior art cannot continue to break through the existing angle measuring precision due to the limitation of geometric optical principle and the influence of environmental factors. The autocollimator comprises a laser, a filtering collimation module, a beam splitter, a reference mirror, a plane mirror, a detector and a data acquisition and processing computer. After the autocollimator is leveled, the plane mirror is placed on a turntable to be measured, and the measurement is carried out when the turntable has no rotation angle and has a rotation angle, so that the laser is emitted to the filtering collimation module to be emitted as monochromatic parallel light to the beam splitter and is divided into two paths. One path is reflected by the plane mirror and then passes through the beam splitter to reach the detector again. The other path is reflected by the reference mirror and then reflected by the beam splitter to reach the detector again. The two beams interfere on the target surface of the detector, the detector records the interference image and uploads it to the computer to calculate the interference fringe offset, so that the angle measurement is completed.

The disclosure describes a kind of anti-resonant hollow fiber size parameter measurement system and measurement method, the measurement system includes sequentially connected incident light source, light source processing module, fiber to be measured, data acquisition module and data processing module, data processing module is filtered to the spectrum formed by the coherent superposition of multiple scattering light beams, Fourier transform group delay spectrum is obtained, and peak retrieval is carried out to the group delay spectrum, and the group delay difference caused by the coherent superposition of each light beam in group delay spectrum is obtained, and the size parameters of anti-resonant hollow fiber are obtained based on the multi-beam interference geometric optics model and the group delay difference between each light beam. Thus, the simultaneous on-line measurement of multiple parameters of anti-resonant hollow fiber can be realized, and the drawing efficiency and output efficiency of anti-resonant hollow fiber can be further improved, and the fiber manufacturing cost is reduced.

An electronic device includes a backlight module, a light modulating panel, a lens structure and a display panel. The backlight module includes light emitting units. The light modulating panel has pixels. The light modulating panel includes a substrate and a light modulating panel medium layer. The lens structure is disposed on the light modulating panel and includes lenses, wherein at least one lens corresponds to at least two pixels. The display panel is disposed on the lens structure. One of the lenses has a protruding surface, a first geometric optical distance L1 is included between the protruding surface and the light modulating panel medium layer, the one of the lenses has a focal length LF and a field of view at focal point FOV, wherein the first geometric optical distance L1, the focal length LF and the field of view at focal point FOV satisfy:0.5≤L⁢1 / LF≤0.8,and⁢ 45∘≤FOV≤7⁢0∘.

The invention discloses a short-process preparation method of an ultra-high-speed laser cladding coating on the surface of a shaft part and the obtained coating, and the method comprises the following steps: firstly, based on energy conservation and momentum balance, calculating and determining a stable process window of ultra-high-speed laser cladding; based on a geometrical optical model, the horizontal offset distance of the laser head relative to the central axis of the workpiece is calculated and controlled. Based on molten pool stress analysis under a rotating coordinate system, the relation between the rotating direction of a workpiece for restraining flowing of a molten pool and the offset direction of a laser head relative to the central axis of the workpiece is determined, under the determined conditions, ultra-high-speed laser cladding is conducted on the outer circle surface of the shaft part, and single-pass precision grinding is directly conducted after cladding. According to the method, the thin-layer coating with the smooth surface and the uniform thickness is obtained through physical stability control, the machining route of cladding-turning-grinding is simplified into cladding-single-pass precision grinding, and the machining allowance and the production cost are remarkably reduced.

The application provides a chip-level biomolecule detection system, which comprises a biomolecule detection chip and an integrated module; the integrated module comprises a temperature control chip and an information acquisition assembly; the temperature control chip is in heat-conducting contact with the biomolecule detection chip; the information acquisition assembly comprises an optical waveguide chip and an image sensing chip; the optical waveguide chip is covered on the image sensing chip, and a filter layer is arranged between the optical waveguide chip and the image sensing chip. Nucleic acid extraction, purification, enrichment and amplification can be realized through the biomolecule chip; low power consumption and high power density can be realized by using the temperature control chip; the optical waveguide chip does not need to be installed with geometric optical components, and the optical path calibration and maintenance in the later stage are avoided, which is beneficial to multi-channel large-scale parallel detection and can be manufactured on a large scale; the structure is simple, and the application requirements of equipment miniaturization and portability are met through chip-level integration. The application also provides a detection method, which is simple in steps, accurate in temperature control, high in detection efficiency and reliable in results.

The invention provides a zoom type optical signal gain regulator and a circuit, the zoom type optical signal gain regulator comprises a support, the support is provided with a light-emitting part, a convex lens, a photoresistor and an adjusting part, the convex lens is arranged between the light-emitting part and the photoresistor, and the adjusting part is arranged between the light-emitting part and the photoresistor. The light emitting part is used for emitting parallel light to the convex lens and irradiating the parallel light on the photoresistor, the adjusting part is used for adjusting the distance between the photoresistor and the convex lens, and the focus of the convex lens is located between the photoresistor and the convex lens. According to the optical principle of focusing of the convex lens, the distance between the photoresistor and the convex lens is precisely changed through the adjusting piece, so that the light intensity irradiated on the photoresistor is continuously changed, the resistance value of the photoresistor is changed smoothly and is wide in range through the adjusting mode based on geometrical optics, stepless continuous gain adjustment is achieved, and the precision of the light intensity is improved. The adjusting precision is high.

The invention belongs to the technical field of new view angle synthesis, and discloses a generalized method for joint optimization of structured light and a neural radiation field. Superposing a plurality of complex components with independent phases to generate structured light; the sampling factor is applied to the structured light, bicubic interpolation is used for sampling the structured light, and the process is irrelevant to depth information; simulating a light transmission process from the scene to be measured to the stereo camera by adopting geometrical optics; a view angle conversion operation is completed according to the depth image and the shielding image of the camera view angle, the structured light is distorted to a binocular view angle, and an active stereo image is obtained; the active stereo image and the RGB stereo image generate stereo image features and a three-dimensional feature body together through a feature extractor, and a renderer based on a neural radiation field is adopted to perform new view angle synthesis and geometric prediction; the whole process from the structured light to the nerve radiation field can be microprocessed, and joint optimization is carried out.

The application discloses a short-focus projection touch geometric optical adaptive accurate calibration method, relates to the technical field of projection touch calibration, and is used for solving the problems of projection and touch geometric coupling, complicated calibration and long-term overall drift correction, and comprises the following steps: a unified geometric optical model and a layered state vector are established; a factory side establishes a model geometric optical priori, a residual base and a drift mode library based on multiple sample mechanisms; when a terminal is installed, a few-point joint calibration is completed by combining attitude and distance observation and a small amount of user clicks; in a running stage, projection side and touch side drift are identified by using multi-source observation data, and a state vector is updated; based on screen area error, uncertainty and interactive density calculation information value, an interface control layout is adjusted, and an explicit calibration trigger area is adjusted, so that the interactive area can maintain high and stable projection alignment accuracy and touch positioning consistency under different installation conditions and long-term operation.

This application relates to the field of sensing, detection, and obstacle avoidance technology, and particularly to a multi-line laser module. The module includes a base, optical elements, a first light source, and a second light source. The optical elements are mounted on the base. The first light source is mounted on the base, and its beam, after passing through the optical elements, forms at least one main ray, which is used for forward distance detection. The second light source is mounted on the base, and its beam, after passing through the optical elements, forms at least two auxiliary rays, which are used for lateral distance detection. This application utilizes the first light source in conjunction with a geometric optical lens to form a high-precision main ray, ensuring the accuracy of forward detection. The second light source, in conjunction with a diffraction element, forms multiple auxiliary rays, achieving wide-range lateral detection. The two work together to eliminate blind spots and improve the completeness of environmental perception. The second light source can generate multiple auxiliary rays using a single diffraction element, eliminating the need for independent light sources and lenses for each auxiliary ray, significantly reducing the module size.

The utility model relates to a composite lattice point structure light guide plate with uniform light guide, which comprises a light guide plate body, a light inlet surface, a light outlet surface and a light guide mechanism, and is characterized in that the light guide mechanism is arranged in the light guide plate body and is used for changing an incident line light source into a uniform area light source to be emitted; the light guide plate comprises a light guide plate body, one side face of the light guide plate body is a light inlet face, the back face of the light guide plate body is a light outlet face, the light guide plate further comprises a luminous source mechanism, the luminous source mechanism is used for supplementing light into the light guide plate body, the luminous source mechanism is arranged on one side of the light inlet face, the diameter of hemispherical lattice points ranges from 0.2 mm to 0.5 mm, incident light is subjected to first-time omnidirectional scattering, and the incident light is subjected to second-time omnidirectional scattering. The light directionality is destroyed, the Mie scattering theory is met, spherical protrusions are arranged on the surface, the diameter ranges from 50 micrometers to 200 micrometers, secondary micro-scattering is triggered, a dark area of primary scattering is filled, the mixing effect of Rayleigh scattering and geometrical optics is achieved by controlling the curvature radius of the protrusions, R ranges from 25 micrometers to 100 micrometers, multi-level scattering is formed by the hemispherical base and the spherical protrusions through the composite net points, and the light emitting face is more uniform.

The application discloses a geometric optical phenomenon restoration method based on a kernel density estimation algorithm, and relates to the technical field of three-dimensional optics, and comprises the following steps: projecting three-dimensional space discrete light ray hitting points to a two-dimensional plane through coordinate conversion; mapping continuous two-dimensional plane coordinates to pixel indexes through affine transformation to obtain a two-dimensional pixel grid; converting discrete points into continuous intensity distribution through a plurality of kernel function diffusion methods; performing nonlinear compression on the kernel function diffusion result through an inverse tangent function to obtain final intensity values; displaying the final intensity values through single-channel to RGB pseudo-color mapping; performing light ray tracing to construct a light ray refraction model; and performing light ray direction to imaging plane coordinate mapping based on the light ray refraction model and the pseudo-color mapping rule to obtain a data set; the smoothness and dynamic range of light ray density distribution are remarkably improved, and high-fidelity visualization of complex refraction phenomena is realized.

The invention discloses a display simulation method and device, electronic equipment, a storage medium and a program product, and relates to the technical field of optical imaging, and the method comprises the steps: constructing a multi-optical-axis display model; acquiring forward initial information of light emitted from any pixel on the display screen; tracking the forward light based on the forward initial information to obtain a forward tracking result of the light; determining reverse initial information of light rays emitted from any pixel on the retina of the simulated eyeball based on the forward tracking result, and performing reverse light ray tracking on the light rays based on the reverse initial information to obtain reverse tracking results of all the light rays; and generating a light field image for a display screen to display based on a reverse tracking result. According to the method, forward ray tracing and reverse ray tracing are sequentially carried out based on the multi-optical-axis display model, geometrical optical path calculation and fluctuation optical characteristic analysis are fused, the light propagation behavior in a complex optical system can be simulated more accurately, and the generation display effect of the light field image is improved.

The invention discloses a satellite inversion method for the canopy chlorophyll content based on a row-sowing rice geometrical optics-radiation transfer composite model, and the method comprises the steps: 1, simulating the spectral reflectance of rice canopies at an interval of 1 nm in different planting scenes based on agricultural priori knowledge through the row-sowing rice geometrical optics-radiation transfer composite model; 2, mapping the simulated canopy spectral reflectivity data set into a satellite image broadband canopy spectral reflectivity data set by using a spectral response function; step 3, constructing red edge chlorophyll index characteristics based on the simulated broadband reflection spectrum data set; and 4, establishing a hybrid inversion model between the red edge chlorophyll index and the paired canopy chlorophyll content CCC, and carrying out canopy chlorophyll content satellite inversion by using the hybrid inversion model to realize large-range rice chlorophyll content space-time dynamic monitoring. According to the method, the precision of the rice canopy chlorophyll content hybrid inversion model is remarkably improved in the early stage of rice growth.

The invention provides an electronic equipment shell, a surface processing method and a mold. The electronic equipment shell comprises a base material layer and a light trapping layer formed on the surface of the base material layer; the light trapping layer is provided with randomly distributed light trapping structures, and the light trapping structures are at least one of protrusions or recesses and are configured to enable incident light to be reflected and absorbed multiple times through the geometrical optical effect. According to the electronic equipment shell, the surface processing method and the mold disclosed by the invention, the random light trapping structure of the light trapping layer can enable incident light to be reflected and absorbed for multiple times, so that surface reflected light is effectively reduced, the surface of the shell presents a deeper and more uniform black appearance, and the problem of large visual difference between a traditional blind hole and a penetrating hole is solved; the random distribution of the light trapping structures avoids the problem of high brightness or shadow of regular textures at a specific angle, ensures that the surface of the shell can keep consistent low-reflection texture at different illumination and observation angles, does not need to additionally add black film materials, simplifies the process steps, and reduces the production cost.

A holographic optical waveguide and a sight, relating to the technical field of optics. A hologram and a holographic waveguide grating are integrated on one element, and optical waveguide transmission characteristics and grating diffraction characteristics are used to achieve an aiming function by means of one optical element, thereby improving the assembly precision of the holographic optical waveguide, reducing the assembly difficulty, and improving the assembly yield. An optical waveguide is added to a conventional hologram, waveguide light transmission characteristics are used to replace conventional geometric optics, and light transmission is implemented by means of refraction and reflection by the optical element, thereby achieving a smaller volume and higher precision. The optical waveguide is provided with an in-coupling waveguide holographic grating and an out-coupling waveguide holographic grating, so that chromatic aberration correction can be performed on a wavelength, and therefore the imaging effect is better than that of conventional monolithic gratings. In addition, a light beam is totally reflected in a substrate and transmitted to the out-coupling waveguide holographic grating, thereby reducing transmission, reducing energy loss, improving the light effect, enabling human eyes to clearly observe reticle information on the hologram, and improving user experience.

The application discloses a method for calculating an average incidence angle of a radome beam, which uses an electromagnetic integral algorithm with high precision to replace a geometric optical method with low precision, and combines threshold screening and weighted average to obtain more accurate parameters of the average incidence angle of the radome beam, so as to provide more accurate design parameters for electric performance design and optimization of the radome.

The invention discloses a diffraction element for generating an annular light source and a design method thereof, and belongs to the technical field of diffraction optics. The design method comprises the following steps: establishing a plane wave and spherical wave incident ray tracing model based on a geometrical optics theory; performing diffraction surface optical path difference and phase distribution calculation according to a ray tracing model; fitting the calculated phase distribution data into a grid phase surface type supported by optical simulation software; light path optimization is carried out in the grid phase surface type obtained through fitting until the annular light spots are converged; micro-nano structure parameters of the diffraction element corresponding to convergence of the annular light spots are calculated, the design of the diffraction element is completed, and the micro-nano structure parameters comprise the etching depth, the diffraction order, the minimum line width and the duty cycle. The problems that a traditional iterative algorithm is large in calculation amount and large in simulation deviation, a traditional axis prism system is large in size and low in efficiency, and an existing diffraction element is difficult in phase singular point fitting are solved, and high-precision and high-efficiency annular light source generation is achieved.

The invention relates to the technical field of wind power operation and maintenance, in particular to a fan tower weld defect detection method and system based on laser radar, and the system comprises a data acquisition module, an anomaly analysis module and a defect identification module. According to the method, a laser radar is used for obtaining geometric-optical double response signals of welding seam space-time alignment; a signal abnormal region is extracted, a reflection saturation distribution index is constructed, and a geometric-reflectivity characteristic vector is generated; identifying the physical attribute of the abnormal region by using the classification model, judging the optical mirror interference as a pseudo defect, and judging the material physical deficiency as a real defect; and performing curved surface fitting repair on the pseudo defects, and performing physical dimension quantification on the real defects. According to the method, the relevance between the light intensity and the depth is excavated, oxide film interference and real defects are effectively distinguished, the problem that the false alarm rate of in-service tower drum detection is high is solved, and non-contact efficient scanning and digital reconstruction are achieved.

The utility model discloses a geometric optical waveguide and diffraction optical waveguide combined optical lens, which comprises a lens main body, and the lens main body is provided with a coupling-out area and a coupling-in area. The coupling-in area is configured to totally reflect light rays; the coupling-out region is configured to reflect the totally-reflected light into human eyes; the coupling-in area is a reflecting lens with a single reflectivity, different from various different transmission and reflection values required to be manufactured in the prior art, only one reflectivity is required, the manufacturing process is low in difficulty, secondly, the coupling-in area is arranged to be the reflecting lens, and on the basis of the geometrical optics mechanism, the coupling-in area can be used for manufacturing different transmission and reflection values. Light rays generated by the image generator are totally reflected in the lens, when the totally-reflected light rays in the lens reach the diffraction optical waveguide coupling-out area, the light rays are reflected out and enter human eyes to form an image, and different from the prior art, the light ray reflection efficiency is high.

The invention discloses a rapid scanning method of a photon counting type laser radar based on illumination light spot modulation, and belongs to the technical field of laser radars. The amplification factor of an object image is changed by adopting optical fiber defocusing or lens zooming, the size of a light spot of illumination on a target is modulated, the probability density of illumination on the target is changed, and the change of the detection probability is realized. With the detection probability as a constraint condition, the size of a target illumination light spot is established according to a geometrical optical imaging relation, a laser radar echo signal equation is used to determine the number of echo photons, the detection probability and the false alarm rate are established according to Poisson statistical distribution, accumulation time is determined according to threshold method target identification, and a full-chain physical relation of the turntable scanning speed is obtained. Therefore, the scanning strategy optimization of the whole space is realized, and the three-dimensional rapid scanning of the space target is realized under the condition of ensuring the constant detection probability. The size of an illumination light spot is modulated by using optical fiber defocusing or lens zooming, and the scanning speed and the detection probability can be considered in the whole three-dimensional space range.

The application belongs to the technical field of photoelectric devices, and particularly discloses a fast optical simulation method and system for cross-scale photoelectric devices, which comprises the following steps: S1, dividing a functional layer and a non-functional layer according to the size of each film layer region of a photoelectric device; S2, judging the complex feature type of the functional layer, processing the complex feature by using a corresponding physical optical simulation method, and obtaining the optical characteristics at the interface; S3, judging whether the photoelectric device is an active device or a passive device according to the function of the photoelectric device, and then determining the light source characteristics; S4, calculating the optical characteristic parameters of the entire photoelectric device by using a geometric optical simulation method on the non-functional layer according to the light source characteristics and the optical characteristics at the interface, and completing the fast optical simulation of the photoelectric device. The fast optical simulation method is established for the complex features that may exist in the actual three-dimensional cross-scale photoelectric device, and the change rule and trend of the optical performance of the device can be reflected.

The invention discloses a method and equipment for simulating amplitude and phase distribution of any target scattered wave on a Cassegrain antenna and a medium. Establishing a coordinate system by taking the vertex of the reference paraboloid as an original point, generating an incident ray equation according to a target coordinate and a scattering angle, and solving an intersection point and a normal direction of the incident ray equation and a main reflecting surface; reflected light rays are obtained by using a reflection law, and intersection points of the reflected light rays and a feed source plane are solved; the amplitude attenuation of each beam of light reaching the feed source is calculated according to the inverse ratio of the square of the optical path, the phase is calculated according to the linear relation of the optical path, and a complex phasor is generated; superposing multiple beams of scattered light complex phasors of the same target to obtain feed source aperture surface synthesis amplitude phase distribution; and the antenna directional diagram can be quickly generated by traversing the polar angle through the fixed polar radius. The whole process is grid-free and iteration-free and is completed in milliseconds, the precision is consistent with the geometric optical limit, real-time calculation can be realized on common hardware, and the antenna design, test and calibration periods are remarkably shortened.

The application discloses a turbine blade radiation temperature measurement area geometric surface reconstruction method, belongs to the technical field of turbine blade radiation temperature measurement, and is based on Comsol Multiphysics simulation software. The method comprises the following steps: configuring a simulation environment, importing a geometric model, configuring a geometric optical physical field interface, dividing a grid, configuring a solver and performing calculation, then exporting ray trajectory coordinates, transforming three-dimensional coordinates in a space rectangular coordinate system by using Matlab, and finally performing geometric reconstruction and mapping corresponding radiation temperature values. The method is favorable for realizing geometric surface reconstruction of a radiation temperature measurement area and is especially suitable for temperature field reconstruction of a turbine blade.

The invention discloses a conscope assembly adjusting method and system, and belongs to the technical field of optical assembly and adjustment. The method comprises the following steps: acquiring a geometrical optical model and initial system wavefront aberration distribution data based on a conscope group interference detection light path; fitting the initial data to obtain a characteristic wavefront aberration coefficient; according to the coefficient and a preset quantitative mapping relation, obtaining an adjustment amount; and adjusting the light path based on the adjustment amount, and carrying out iterative adjustment on the conscope group until the wavefront aberration distribution meets the requirement. The system comprises a data acquisition unit, a fitting unit, a calculation unit and an adjustment unit which are respectively used for realizing the corresponding steps. According to the method, efficient and high-precision installation and adjustment of the conscope set are achieved through the quantitative mapping relation and iterative installation and adjustment, complex pre-calibration is not needed, and the method is suitable for batch installation and adjustment scenes and has remarkable engineering application value.

This invention discloses a method and system for optimizing dynamic rendering of virtual scenes based on light field reconstruction, specifically relating to the field of image data processing technology in computational imaging. First, it completes the access of multi-source data, geometric / optical calibration, and affine alignment of timestamps, constructing a unified time base and evidence chain within a sliding window of fixed step size. Then, it establishes a multi-scale spatial parameterized structure within the scene bounding box, using path tracing as the forward model to jointly solve geometry, radiation, and material properties, completing static / dynamic decomposition and fusing color, depth, polarization, and spectral residuals to generate an optical path consistency map. Based on this, it constructs a priority scalar field fused from uncertainty and importance, performing area-level budget arbitration and degradation control, and mapping it to executable control quantities such as sampling density, bounce depth, geometric level, and indirect light order. Finally, it improves cross-frame stability through temporal robust fusion and differential updates, and feeds quality metrics and operational statistics back to the next frame's scheduling to form a closed loop.

The invention relates to the technical field of eye movement tracking, in particular to an optical simulation method for an eye movement tracking system, and the method comprises the steps: carrying out the model selection of a camera and an infrared light supplement lamp according to the system demands; establishing a camera optical system and an infrared LED illumination model according to a model selection result; according to system requirements, primary arrangement is carried out on optical layouts of the camera and the infrared light supplement lamp; tracing simulation is carried out on a camera imaging light path and an infrared light supplementing lamp illumination light path; judging whether the geometrical optical indexes meet requirements or not under the current optical layout; and judging whether the irradiance index meets the requirement or not under the current optical layout. According to the method, the geometrical optical index and the irradiance index are judged and iterated, so that the system gradually approaches to the system demand index and gradually tends to be stable, the recognition precision of the eye movement tracking system can be optimized, the working range of the system is widened, and it is ensured that infrared radiation generated in the system meets the human eye infrared irradiance safety.