261 results about "Telecentric lens" patented technology

The invention relates to the technical field of precision measurement, and discloses an industrial camera ball target array calibration plate and a pixel calibration method for a telecentric lens, and the calibration plate comprises a calibration plate which is a ball target array calibration plate and is suitable for the pixel size calibration of an industrial camera using the telecentric lens. The calibration plate is composed of a ball target array base and a high-precision ball target, a pixel size calibration method for the industrial camera using the telecentric lens is provided, the industrial camera collects a ball target fixed plate image, sub-pixel edge coordinates of the ball target are obtained through image processing, circle fitting is conducted on the sub-pixel edge of the ball target, and the diameter is calculated; the invention provides a high-precision calibration method for the pixel size of the industrial camera using the telecentric lens, the full-domain pixel size calibration of the field of view of the lens can be realized, and the calibration result is accurate and reliable.

The invention relates to 3D-AOI detection equipment and a three-dimensional reconstruction method. According to the method, an optical machine, a first industrial camera, a plurality of second industrial cameras and a coaxial telecentric lens are included; the optical machine is connected with the coaxial telecentric lens and is used for emitting structured light, and the structured light enters from the side view of the coaxial telecentric lens and is vertically projected to the measured object after being reflected by the inclined plane of an internal reflective mirror; the imaging end of the first industrial camera is in view connection with the top surface of the coaxial telecentric lens, and a light path of the first industrial camera penetrates through the center of the coaxial telecentric lens and extends to a measured object; the plurality of second industrial cameras are arranged around the first industrial camera, and the lens of each second industrial camera is aligned with a measured object at a set inclination angle. By adopting the method, the scanning efficiency can be improved.

The present invention discloses a device and method for semiconductor grain double-sided simultaneous fully equal optical path confocal imaging detection based on polarization separation imaging method. The device includes a CMOS or CCD polarization camera, a telecentric imaging lens, a polarization cube beam splitter, a right-angle image rotation prism, a semiconductor grain, and a transparent glass stage for placing the semiconductor grain, which are sequentially arranged in the optical path direction. The advantages of the device and method of the present invention are as follows: It can achieve double-sided simultaneous fully equal optical path confocal polarization imaging detection of the object to be measured, that is, △ = 0, without the need to use a large-depth-of-field telecentric lens to compensate for the optical path difference of double-sided imaging; the double-sided simultaneous polarization imaging detection device has a simple and compact structure and is easy to assemble and debug.

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for characterizing a particulate ingredient of a mixture including a hopper configured to dispense particles along an axis and in freefall through an imaging region, an illumination sub-system including at least one light source arranged at a first location with respect to the axis and configured to illuminate the imaging region, an image capture sub-system including at least one image capture device including a telecentric lens and arranged at a second location with respect to the axis and configured to align a focal plane of the at least one image capture device with the axis within the imaging region, such that when a particle freefalls through the imaging region, the particle is illuminated by the illumination sub-system and the image capture sub-system captures images of at least three silhouettes of the particle within the imaging region.

The utility model discloses a chip defect multi-face detection device which comprises a detection shell, a display mechanism used for chip multi-face display is installed on the detection shell, a camera is installed in the detection shell, and an adjusting mechanism used for driving the camera to adjust the size of a light spot in the detection shell is further installed on the detection shell. According to the utility model, through the cooperation of the rectangular prism module, the surface light source, the beam splitter prism and the mesopore surface light source, the four rectangular prisms are closed together to form a square chamber, and the chip is placed in the square chamber, so that a camera can detect the front surface and four side surfaces of the chip at the same time; through the arranged adjusting mechanism, the product is small, a telecentric lens needs to be used, and the working distance of the telecentric lens is relatively fixed, so that in order to facilitate focusing, the device is provided with the focusing adjusting mechanism, the position of the telecentric lens can be adjusted through a knob, and a shot picture can be clearly displayed.

The utility model relates to a symmetrical double telecentric lens, and relates to the technical field of measurement and control instruments in accurate manufacturing. Comprising an incident lens group, an imaging lens group and a diaphragm. The diaphragm is arranged between the incident lens group and the imaging lens group, and the focal lengths of the incident lens group and the imaging lens group are the same; and the incident lens group and the imaging lens group at the two sides of the diaphragm are respectively provided with seven lenses with the same number. According to the invention, an object is imaged according to the object-image proportion of 1: 1 through a small number of lens groups, so that the vision is more visualized, the illusion of people or interpretation errors caused by image distortion due to an image magnification or reduction mode are reduced, the authenticity is improved, and people can easily distinguish detail features of the object on a large-target-surface sensor. The problems that the number of built-in lenses of an existing lens is large, the magnification and imaging stability are insufficient, and the requirement for high precision cannot be met are solved.

The invention discloses a method for detecting internal defects of a folded optical path lens. The method comprises the following steps: driving a telecentric lens to move step by step in the vertical direction based on a Z-axis motion mode so as to focus the telecentric lens; step size is set, positions of a plurality of telecentric lenses are obtained, images of different positions of the folded optical path lens are collected based on the focused telecentric lenses, and a detection image set is obtained; obtaining a gray value of the detection image set to obtain gray value distribution information of different positions; performing definition detection on the detection image set, and analyzing the definition of the images at different positions; defect information is obtained based on gray value distribution information and definition of images at different positions, image acquisition of different layers of the lens by different depths of field is sequentially realized through a large-target-surface camera according to a stepping mode, defect positions and defect depths are analyzed according to image gray values, and defect types are accurately analyzed.

The invention relates to the technical field of ultrasonic scanning microscopes, in particular to a system and a method for measuring surface unevenness and warping of an ultrasonic scanning microscope. The system comprises a water tank, a light emitting device, a light receiving device and a signal processing module, the light emitting device generates line laser through a semiconductor laser and an optical shaping module, and scanning is achieved through a high-precision galvanometer. The light receiving device is provided with a narrow-band filter, a telecentric lens and a CMOS sensor and is used for capturing a light spot image; the signal processing module integrates sub-pixel positioning, galvanometer nonlinear correction, self-adaptive filtering and temperature compensation algorithms, light spot center sub-pixel-level positioning is achieved through Gaussian curved surface fitting, galvanometer correction and temperature drift compensation are combined, the measurement precision and stability are improved, and finally high-precision height information is fed back to an ultrasonic scanning system. According to the invention, the accuracy and reliability of surface unevenness and warping measurement are improved.

The invention discloses a surface topography measurement device and method based on polarization phase shift. The device comprises a laser module, a polarization beam splitting and interference module, a polarization beam combining and imaging module, a polarization image acquisition module and a control and reconstruction module. The laser module comprises a monochromatic tunable laser, an optical fiber collimating amplifier and a polarizer; the polarization beam splitting and interference module comprises a polarization beam splitting prism, a first quarter-wave plate, a plane mirror and a second quarter-wave plate; the polarization beam combining and imaging module comprises a polarization splitting prism, a third quarter-wave plate and a telecentric lens; the polarization image acquisition module comprises a micro-polarization array camera and an image processing unit, and the micro-polarization array camera synchronously acquires four polarization interference images through single exposure; and the control and reconstruction module obtains measurement data of the surface topography of the to-be-measured object through a phase unwrapping algorithm and three-dimensional topography reconstruction. According to the invention, high-precision, large-field-of-view, portable and high-efficiency field detection can be realized.

The invention discloses a method for automatically detecting surface defects of an optical prism and a detection system. The system comprises an image acquisition module, a light source module, a mechanical loading module and a control processing module. The image acquisition module acquires multi-angle images through a high-resolution area-array camera and a telecentric lens; the light source module combines a coaxial light source and a low-angle annular light source to enhance the defect contrast; the mechanical object carrying module is an electric object carrying table capable of accurately rotating; the control processing module comprises an image preprocessing unit, a defect recognition unit and a classification output unit, and can automatically recognize defect types such as scratches, stains, bubbles, broken edges and hard spots and output size and position parameters of the defects. In the aspect of the method, a score calculation formula is designed for stain and broken edge defects, and classification and recognition are realized by combining gray analysis, edge extraction and a lightweight neural network. The method has the advantages of comprehensive detection types, high precision, strong adaptability and the like, and is suitable for large-scale quality inspection links of optical elements.

The invention discloses a device and method for intelligently sorting waste photovoltaic modules and recovering silicon wafers, the device comprises a box taking device, a frame dismantling mechanism, a sorting device, a hot knife device, a tunnel kiln, a screening device, a silver extracting machine and a master control unit, and the master control unit is provided with ResNet-18; the sorting device comprises an annular infrared light source, an area-array camera, a telecentric lens, a pneumatic push rod and a flow guide pipeline, wherein the pneumatic push rod and the flow guide pipeline are arranged on the two sides of the conveying belt respectively. The hot knife device comprises an upper driving roller, a lower driving roller, a vacuum chuck and a double-layer electric heating knife head, the conveying belt penetrates through a gap between the two driving rollers and is connected with the conveying belt at the tail end of the sorting device, and an air cooling fan and a copper solder strip absorbing device which are opposite in position are arranged behind the driving rollers; the tunnel kiln is connected with the screening device through a conveying belt, and discharging ports of the screening device and the hot knife device are connected with the silver extracting machine through conveying belts. Intelligent sorting of the waste photovoltaic modules is achieved, and high-value recovery and conversion of effective components of the waste photovoltaic modules are promoted.

The invention relates to the technical field of optical lenses, and discloses a high-magnification achromatic telecentric lens and an optical system thereof. The optical system comprises a first lens G1 with positive focal power, a second lens G2 with negative focal power, a third lens G3 with positive focal power, a fourth lens G4 with negative focal power, a fifth lens G5 with positive focal power, a sixth lens G6 with negative focal power, a seventh lens G7 with positive focal power and a diaphragm T which are sequentially arranged from an object side to an image side, the system comprises a first lens G8 with negative focal power, an eighth lens G8 with negative focal power, a ninth lens G9 with negative focal power, a tenth lens G10 with positive focal power and an eleventh lens G11 with positive focal power. According to the optical system of the double-telecentric structure, the amplification factor can reach four times or above, the numerical aperture NA can reach 0.16, and the resolution of the microscopic level of 2 micrometers can be achieved; and the maximum imaging surface can reach phi 44 mm.

A device and method used to inspect wellbores, cased or uncased using cameras. Improvements in downhole optical imaging are provided using telecentric lens, prisms and mirrors, or structured lighting. Stereoscopic arrangements and ultrasound sensor may provide 3D or contour information. The images are stored on the tool and analyzed later. The present tool overcomes the deficiencies currently experience by downhole camera operators, such as poor scale and perspective.

This invention discloses a coaxial telecentric polarization hyperspectral imaging device and a biological tissue detection system. The device includes: a light source emitting unpolarized light; a circular polarization generator converting the unpolarized light emitted by the light source into circularly polarized light; the circularly polarized light being coupled into a coaxial telecentric lens via a coaxial optical interface; the coaxial telecentric lens reflecting the circularly polarized light, which then illuminates the target object plane; the signal reflected from the target object re-enters the coaxial telecentric lens and is transmitted to a polarization analyzer module via a beam splitter. The polarization analyzer module includes a first waveplate and a first linear polarizer. The first waveplate receives the signal transmitted from the beam splitter and transmits the signal to the first linear polarizer. The first linear polarizer sends the output light to a hyperspectral camera, and the hyperspectral camera sends the output image to a computer for image analysis.

The machine vision detection method comprises an image acquisition unit, a light source unit and an image processing unit, the image acquisition unit comprises a color high-resolution industrial camera and a telecentric lens, and the working distance between the telecentric lens and an object to be detected is set as a specific value; the image acquisition unit comprises a first image acquisition unit and a second image acquisition unit; the light source unit comprises a first light source subunit and a second light source subunit, and the first light source subunit is used for detecting oil stains on ink; the first light source subunit adopts an annular light source, and after the first image acquisition unit and the second image acquisition unit respectively acquire two groups of images of the first light source subunit and the second light source subunit, the subsequent processing flow is executed; and a potential defect area is preliminarily identified and positioned.

The utility model discloses a visual PIN needle detection equipment, including test board, the fixture seat of setting on test board and the CCD subassembly of setting on the fixture seat top, the CCD subassembly includes the coaxial light source, telecentric lens and CCD camera who sets gradually in vertical direction away from fixture seat, and CCD camera, telecentric lens and coaxial light source are on the same axis, and the light shield of setting the back and two side masks of test board is provided with on test board, and the connecting interface is provided with on test board, and the fixture seat includes the base and the positioning fixture of detachable setting on the base, and the positioning fixture is used for positioning installation detected component, and the support plate for supporting base is provided with on test board, and the sensor is provided with on the both sides of positioning fixture of support plate. The utility model discloses reasonable in structure design, and through the visual configuration of CCD camera + telecentric lens + coaxial light source, can realize to PIN needle and carry out detection, and thoroughly solved the problem that PIN needle is easy to wear in other detection mode among existing.

The invention provides a coaxial telecentric imaging tinplate can defect identification method and system, and relates to the technical field of defect identification, the system is composed of a coaxial telecentric camera assembly, a polarization multispectral light source assembly and an image processing and control unit, and can body images with constant magnification are obtained through a telecentric lens and coaxial illumination; a switchable cross-polarization visible light and near-infrared light source is used for synchronously collecting multi-modal images, and separation and difference are carried out on different polarization and wave band images to obtain a specular reflection component image, a diffuse reflection component image and a multi-spectral difference image. The image is divided into a character area, a pattern area and a bottom color area according to the format of the can body, comprehensive judgment is conducted through character comparison, a lightweight neural network and defect area connectivity analysis, automatic recognition of defects such as scratches, through printing and smudginess is achieved, and the accuracy and stability of appearance detection of the tin can on a high-speed production line can be improved.

Embodiments of the present application provide a high-magnification coaxial telecentric lens and a camera module. The high-magnification coaxial telecentric lens comprises, in order from the object side to the image side, a first lens group, a light splitting prism, a diaphragm, a second lens group and a third lens group. The first lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens. The second lens group comprises a sixth lens and a seventh lens. The third lens group comprises an eighth lens and a ninth lens. The light splitting prism is provided with a coaxial light source on one side. The first lens, the third lens, the fifth lens, the sixth lens and the ninth lens all have positive refractive powers. The second lens, the fourth lens, the seventh lens and the eighth lens all have negative refractive powers. The first lens group comprises a first cemented lens. The focal length f J01 of the first cemented lens and the focal length f1 of the first lens group satisfy the relationship: 45 < f J01 / f1 < 55. The high-magnification coaxial telecentric lens achieves the purposes of high magnification, large numerical aperture and high imaging quality.

The invention discloses a double liquid telecentric lens, which belongs to the technical field of optical design and is sequentially provided with an optical amplification group, an aperture diaphragm, a liquid lens and an imaging group along an optical path. Wherein the optical amplification group comprises three lenses, the first lens is a biconvex lens, the second lens is a biconvex lens, and the third lens is a biconcave lens in the direction of an optical path; the liquid lens comprises protective glass, optical liquid is packaged in the protective glass, and a magnetic field generator for adjusting the curvature of the liquid lens is arranged on the protective glass; the imaging group comprises three lenses, along the optical path direction, the fifth lens is a convex-concave lens, the sixth lens is a biconcave lens, and the seventh lens is a concave-convex lens. On the premise of keeping the magnification and resolution of the lens unchanged, the high-low fall detection accuracy and speed can be effectively improved, so that the high-low fall detection method plays a greater role in various precision detection fields.

The application belongs to the technical field of spectral detection, and particularly relates to a light-weight LIBS online detection device and method with automatic focusing, wherein the device sequentially comprises a photoelectric switch, a pre-detection system, a controller, a delay timer, a pulse laser, a mirror, a zoom unit, an ellipsoidal mirror, a displacement adjustment platform, a transmission window sheet, a fiber coupling unit, a spectrometer and a signal strength detector according to a control logic and an optical propagation path. The application can easily realize zooming through the synchronous movement of the ellipsoidal mirror and the fiber coupling unit driven by the zoom lens and the displacement adjustment platform, can adapt to objects with different heights and shapes, solves the problem of large movement load in the zooming process, realizes light weight, and can judge the focusing range in advance through the telecentric lens imaging pre-detection system, so that the detection analysis efficiency is improved.

The invention discloses a liquid lens wavefront detection device and method based on a background schlieren method. The detection device comprises a first reference wavefront beam generation assembly, a double-side telecentric lens and a camera, and a reference wavefront beam emitted from the first reference wavefront beam generation assembly enters a liquid lens to be detected, enters the double-side telecentric lens after being transmitted by the liquid lens to be detected, and is collected by the camera after being transmitted by the double-side telecentric lens. The detection device is used for collecting a reference image and a dynamic image of the to-be-detected liquid lens, so that background displacement is obtained, wavefront slope distribution is further obtained, and finally wavefront distribution and wave aberration of the to-be-detected liquid lens are obtained after integral reconstruction is conducted on the wavefront slope distribution. The telecentric background schlieren method is adopted for liquid lens wave aberration detection, and the problems that in a traditional Shack-Hartmann wavefront detection technology, a microlens array needs to be used for dividing wavefront to be detected into a plurality of wavelets, and the spatial resolution is limited by the microlens size and the duty ratio are solved.

The present invention belongs to the field of image spectrum detection, and specifically relates to a high-precision detection method for the contour of the meniscus of liquid in a capillary tube. It comprises a telecentric lens, an industrial camera, a displacement platform, a light source, a capillary tube and a culture dish; the industrial camera, the capillary tube and the culture dish are respectively mounted on different displacement platforms. The light source is provided with a rotating telescopic rod to achieve all-round movement. When photographing the contour of the meniscus of liquid in the capillary tube, the light source, the meniscus of the capillary tube and the industrial camera are adjusted to be aligned on the same horizontal plane. Based on the principle of telecentric imaging and the principle of light refraction, a distortion correction function for the contour of the meniscus in the capillary tube is derived. The present invention uses an industrial camera in combination with a telecentric lens, thereby avoiding the problem of shape distortion caused by changes in the distance between the object and reducing the difficulty of image distortion correction. The meniscus contour distortion correction function derived based on the telecentric imaging principle can accurately calculate the actual value of the meniscus contour and restore the actual contour of the meniscus.

The invention discloses a polyester blend fiber yarn width detection device, and relates to the field of polyester blend fiber yarns. A polyester blend fiber yarn width detection device comprises a rack and further comprises an adjusting supporting frame fixedly connected to the rack, a cover plate is arranged on the adjusting supporting frame, a tail supporting frame is fixedly connected to the rack, and an optical detection box is fixedly connected to the adjusting supporting frame and the tail supporting frame; a first industrial camera and a second industrial camera are symmetrically and fixedly connected to the optical detection box; the first industrial camera and the second industrial camera which are symmetrically arranged on the optical detection box are matched with the backlight source and the telecentric lens, non-contact detection is achieved, the telecentric lens eliminates image distortion, it is ensured that the proportion of a shot image to the actual yarn size is constant, double-camera symmetrical shooting is combined, the width detection precision is improved, and the detection precision is improved. The non-contact mode avoids physical damage of traditional contact measurement to the surface of the yarn, and the yarn quality is guaranteed.

The invention relates to the technical field of college physics experiment devices, and discloses a liquid viscosity coefficient and surface tension coefficient measurement comprehensive experiment instrument, which comprises a test bed, a first square column container, a second square column container, a timing automatic release device, a force sensor, a metal circular ring, an industrial camera matched with a telecentric lens, a lifting platform and a host. According to the invention, two original experimental devices are combined into one, so that the cost is saved, and the laboratory space is also saved; by designing the timed automatic release device, manpower is saved, and errors caused by manual operation of an original experimental instrument can be reduced; and the instantaneous speed of the small ball on the falling path is measured by using a machine vision technology, so that the selection basis for selecting the constant-speed motion interval of the small ball can be explored.

The invention discloses a double telecentric lens, an optical system and semiconductor equipment, and belongs to the technical field of optical equipment. The double telecentric lens provided by the invention comprises a first lens group, a second lens group, a third lens group and a fourth lens group which are sequentially arranged along an optical axis direction. The first lens group is sequentially composed of a first prism, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. And the second lens group consists of a seventh lens, an eighth lens, a ninth prism and a tenth lens in sequence. And the third lens group consists of an eleventh lens, a twelfth prism and a thirteenth lens in sequence. And the fourth lens group consists of a fourteenth lens and a fifteenth parallel plate in sequence. In the scheme, the double telecentric lens adopts an optical architecture in which the front lens group and the rear lens group cooperate, and the front lens group serves as a short-focus convergence unit to primarily converge object light and correct basic chromatic aberration; and the rear lens group is used as a long-focus imaging unit to balance aberration and realize high magnification and a flat image surface.

A substrate processing system includes a processing chamber, a substrate support, a laser, and a collimation assembly. The substrate support is disposed in the processing chamber and configured to support a substrate. The laser is configured to generate a laser beam. The collimation assembly includes a plurality of lenses or mirrors arranged to direct the laser beam toward the substrate to heat exposed material of the substrate. The plurality of lenses or mirrors are configured to direct the laser beam in a direction within a predetermined range perpendicular to a surface of the substrate.

The present application relates to a kind of pixel depth of field determination method and determining unit, three-dimensional reconstruction method and system, electronic equipment, computer readable storage medium, the determination method includes the steps: after the transmission of stripe image by telecentric lens, half-transmission half-reflection mirror is projected to the surface of measured object, by the reflection of telecentric zoom lens, half-transmission half-reflection mirror is respectively measured object reflected projection image is collected under two different focal distances;Afterwards, according to several real images under each focal length, the corresponding measured modulation is calculated respectively, two measured modulation is subtracted to obtain measured differential modulation, measured differential modulation is in the corresponding depth of field-differential modulation relationship corresponding depth of field as the actual depth of field of to-be-determined pixel, wherein, depth of field-differential modulation relationship is obtained by calibration step.Using the method of the present application can obtain more accurate depth of field, improve the effect of three-dimensional reconstruction.

The utility model relates to a double telecentric lens for industrial detection, which comprises a lens cone, a lens, a lens box, prisms and cameras, the lens cone comprises an inner lens cone, an outer lens cone and a lens cone sealing ring, the lens is arranged in the lens cone, one end of the lens cone is provided with the lens box, two ends of the lens box are respectively provided with the lens cone, two ends of the lens box are respectively provided with the cameras, and the prisms are arranged in the lens box. The inner lens cone is installed inside the outer lens cone, the outer side of the inner lens cone is provided with a plurality of diversion trenches, the inner side of the outer lens cone is provided with a plurality of clamping blocks, and the clamping blocks are installed on the diversion trenches. The lens box and the prism adopted by the utility model can shoot and detect at the same time under two-end visual angles, and the length of the utility model is reduced.

The utility model discloses an image-side telecentric lens and optical equipment for wide-spectrum imaging. The lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, an aperture, a seventh lens, an eighth lens, a ninth lens, a tenth lens, and an eleventh lens in order from the object side to the image side along the optical axis. The system of the utility model adopts a spherical glass lens design, which not only meets the use requirements of wide-spectrum imaging, but also meets the image-side telecentric design requirements, so that the telecentricity of each band is less than 0.5 degrees.

The invention is applicable to the field of detection, and discloses an image acquisition system and a calibration method applied to a transparent tubular workpiece, the image acquisition system comprises an imaging unit, a trigger and motion control unit and an illumination unit, the trigger and motion control unit comprises a driving device and a controller, the driving device is used for bearing and driving a tested transparent tubular workpiece to do horizontal linear motion and rotary motion, the imaging unit comprises a double-telecentric lens, a zooming assembly, an image sensing and collecting element and a semi-reflecting and semi-transmitting lens, the driving device and the zooming assembly are respectively connected with the controller, and the lighting unit comprises a telecentric light source. The telecentric light source is arranged right below the double telecentric lens and located below the transparent tubular workpiece to be detected, and the definition of image acquisition can be improved through cooperation of the telecentric light source and the double telecentric lens.