2649 results about "Imaging lens" patented technology

Hyperspectral imaging methods, devices and systems are described that improve the hyperspectral accuracy, and reduce manufacturing costs, by using two images that enable the recovery of hyperspectral images with high fidelity. One hyperspectral imaging device includes one or more imaging lenses, one or more sensors positioned to receive light associated with an object from the one or more imaging lenses, and a spectral filter. The hyperspectral imaging device is configured to capture a first image produced without using the spectral filer and to capture a second image produced with the spectral filter. The first image and the second image have different spectral contents, and the first and the second images are processed using a trained neural network for producing hyperspectral imaging data associated with the first and second images.

The invention discloses a surface defect detection device and method based on polarized optical dark field imaging, and belongs to the technical field of industrial defect imaging detection, the device comprises a polarization camera, an imaging lens, a polarization annular LED light source and a sample to be detected which are coaxially arranged; wherein the polarization camera and the imaging lens form a polarization imaging system, the polarization annular LED light source emits linearly polarized light with an inclination angle, and the linearly polarized light is reflected and scattered on a sample to be detected; the linearly polarized light enters the surface of a to-be-detected sample, a small amount of reflection and most of scattered light of the to-be-detected sample are collected by the imaging lens and the polarization camera through a circular hole in the center of the polarization annular LED light source, and finally imaging is achieved. The defect depth can be calculated according to the defect width and the defect inclination angle, so that the defect depth is inversed by the low-frequency linear polarization degree, and the problem that the defect depth information cannot be effectively extracted in the prior art is solved.

The invention relates to the technical field of wafer warpage and curvature detection, in particular to a wafer warpage and curvature detection system and a detection method thereof, and the detection system comprises a laser, a beam expander, a diaphragm, a beam splitter prism, a collimating mirror, a reference mirror, an imaging lens, a CCD and a computer, the light beam is reflected by the sample to be measured and then returns along the same path to interfere with the reference light so as to generate three groups of interference fringes, and the three groups of interference fringes pass through the imaging lens, the CCD and the computer and then are calculated so as to obtain the warping degree and the bending degree of the sample to be measured. According to the invention, the multi-surface interference fringe pattern of the double-sided polished sample to be measured is acquired by using the wavelength-adjustable Hunfizeau interferometer, and the warping degree and the bending degree of the sample to be measured are obtained through calculation, so that the problem of mapping errors caused by measuring the surface shape by using two interferometers or overturning the measured surface shape is solved; therefore, the detection steps of the warping degree and the bending degree of the wafer can be simplified, and the precision of the detection result is improved.

The invention discloses an optical imaging lens, which comprises an imaging lens group, the imaging lens group comprises a lens group and a spacing element group, and the lens group is composed of a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged from an object side to an image side along a first optical axis; the spacing element group comprises a first spacing element and a second spacing element; the optical imaging lens satisfies the following conditions: 6.74 lt; eP12 / T12lt; 12.80 and 31.30 lt, 12.80 and 31.30 CT2 / (T23 + CP2) lt; eP12 is the distance between the first spacing element and the second spacing element in the first optical axis direction, T12 is the spacing distance between the first lens and the second lens on the first optical axis, CT2 is the center thickness of the second lens on the first optical axis, T23 is the spacing distance between the second lens and the third lens on the first optical axis, and CP2 is the maximum thickness of the second spacing element.

An image formation lens (IL) for a microscope comprises: a negative lens; and a positive lens (L13) that satisfies the following conditional expression:-0.002×(ν⁢dP-35)+0.602-θ⁢gFP<023<ν⁢dP<65where vdP: an Abbe number of the positive lens, and θgFP: a partial dispersion ratio of the positive lens that is defined by the following expression: θgFP=(ngP−nFP) / (nFP−nCP) where ngP is a refractive index of the positive lens to a g-line, nFP is a refractive index of the positive lens to an F-line, and nCP is a refractive index of the positive lens to a C-line.

A spatiotemporal illumination microscope system is presented. The system includes a multi-well plate configured to receive live cells and a DMD configured to deliver targeted illumination to selectively illuminate a plurality of the wells. The system further includes a tandem-lens system having an objective lens and an imaging lens positioned facing each other to capture fluorescent light emitted from the cells. The system also includes an image sensor that receives fluorescent light captured by the tandem-lens system, generating imaging data. The system further includes a controller configured to use the imaging data to control closed-loop modulation of the live cells.

The invention discloses an optical imaging system, which sequentially comprises an imaging lens group, a prism and an imaging surface from an object side to an image side along an optical axis, and the imaging lens group sequentially comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power and a fifth lens with negative focal power from the object side to the image side along the optical axis, the object side surface of the second lens is a convex surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the fourth lens has positive focal power, and the object side surface of the fourth lens is a convex surface; wherein the optical imaging system comprises four lenses with focal power; the imaging lens group and the imaging surface are positioned on the same side of the prism, and the maximum field angle FOV of the optical imaging system is greater than or equal to 23.2 degrees and less than or equal to 23.6 degrees; the central thickness CT1 of the first lens on the optical axis and the central thickness CT2 of the second lens on the optical axis meet the following conditions: 1.35 lt; cT2 / CT1lt; and 2.60.

A lens form for a low parallax imaging device includes a plurality of imaging lens elements arranged to capture and image polygonal fields of view. The lens form includes a compression lens element group and a wide-angle lens element group.

The invention discloses a whole-layer atmospheric turbulence measurement method based on centroid drift and light intensity flicker. Belongs to the technical field of satellite-ground laser communication. The atmospheric turbulence parameter measurement step comprises the following steps: using a high-resolution imaging lens and a high-speed visible light camera as receiving devices to collect a starlight spot image after atmospheric turbulence; then, edge detection of the star map is carried out through Zernike moments, so that shape features in the star map are accurately analyzed and recognized, and sub-pixel-level edge detection is realized; on the basis, dynamic lansosian interpolation is carried out in a star point edge area, resampling is realized, star map details are reserved, and the accuracy of centroid positioning is improved by using a gray gradient normalized amplitude enhancement weight method, the anti-interference capability is improved, and higher positioning precision is realized; and finally, through calculation of the light intensity flicker variance and the centroid drift variance, the whole atmospheric turbulence intensity in the atmospheric channel transmission condition during satellite-ground laser communication is obtained.

The utility model relates to a foresight ultra-wide-angle binocular camera. An optical system of the camera is composed of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from left to right along a light incident light path. Under the condition that retroflexion caused by aspheric coefficients is not considered, the first lens is a meniscus concave negative lens, the second lens is a meniscus concave positive lens, the third lens is a meniscus convex positive lens, the fourth lens is a biconvex positive lens, the fifth lens is a meniscus concave negative lens, the sixth lens is a meniscus convex positive lens, and all the lenses are made of glass materials. Wherein the first lens and the sixth lens are glass aspheric lenses, and the fourth lens and the fifth lens form a balsaming lens group. While the wide-angle 120-degree clear imaging is realized, the wide-angle 120-degree wide-angle imaging lens has a relatively small appearance size and relatively high environmental stability.

The embodiment of the invention discloses a multispectral recognition device and method based on a metasurface, a medium and equipment, and the device comprises a sub-aperture imaging lens group which is used for collecting the multispectral information of a target object, carrying out the sub-aperture convergence, and outputting the sub-aperture convergent light in a parallel light form; the metasurface modulation device is used for generating a preset number of metasurface atoms through the micro-nano structure metasurface, performing multispectral modulation on the aperture-divided convergent light according to the metasurface atoms, and obtaining modulated multispectral information and unmodulated spectral information; and the charge-coupled device is used for collecting the modulated multispectral information and the unmodulated spectral information to obtain a multispectral image and a full-band image. And the target detection module is used for carrying out softmax normalization processing after carrying out feature fusion on the multispectral image and the full-band image, and outputting a final target identification result. By combining the super-structure surface multispectral imaging under the deep learning method, the imaging equipment is miniaturized, and the target recognition accuracy is improved.

An imaging lens with an optical axis includes a lens carrier and a variable through hole assembly. The lens carrier is configured for at least one lens element to be disposed therein, and the lens carrier includes a mount structure. The variable through hole assembly includes a plurality of movable blades and a rotatable element. The movable blades movably and together surround the optical axis to form a through hole, and a size of the through hole is variable by movement of the movable blades. The rotatable element is connected to the movable blades, and the rotatable element moves the movable blades to vary the size of the through hole. At least one of the movable blades and the rotatable element of the variable through hole assembly is disposed on the mount structure.

A camera module includes an imaging lens having an optical axis, a variable through hole mechanism, an image sensor, an image sensor actuating module and a flexible printed circuit. The variable through hole mechanism is disposed corresponding to the imaging lens to adjust an amount of light into the imaging lens. The image sensor is disposed on the optical axis and is configured to convert imaging light passing through the imaging lens into an image signal. The image sensor actuating module is configured to move the image sensor. The variable through hole mechanism and the image sensor actuating module each have a coil disposed on the flexible printed circuit. The flexible printed circuit is electrically connected to the variable through hole mechanism and the image sensor actuating module.

The imaging lens consists of, in order from the object side, a first lens group having a positive refractive power, a stop, a second lens group having a positive refractive power, and a third lens group. The third lens group includes one or more positive lenses and one or more negative lenses. During focusing, an entirety of the first lens group, the stop, and the second lens group, or an entirety of the second lens group integrally moves as a focus group, and the third lens group remains stationary with respect to an image plane. The imaging lens satisfies predetermined conditional expressions.

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.

The utility model relates to an LCOS (Liquid Crystal On Silicon) projection device, which comprises a light source module capable of emitting red, green and blue light beams, a polarization filter and an imaging lens which are sequentially arranged along a projection light path, an LCOS chip capable of modulating the polarization state of incident light is arranged on a projection light path between the polarization filter and the imaging lens, and an imaging lens group capable of imaging the incident light onto the LCOS chip is arranged on a projection light path between the light source module and the polarization filter. And a polarization layer capable of transmitting P polarized light and reflecting S polarized light is arranged on the polarization filter. Compared with a polarizing prism applied to a traditional LCOS projection light path, the LCOS projection light path has the advantages that through the arrangement of the polarizing filter and the polarizing layer which is arranged on the polarizing filter and can transmit P polarized light and reflect S polarized light, the LCOS projection light path has higher polarization efficiency, stray light is reduced, and optical efficiency is improved.

An imaging lens system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, sequentially arranged from an object side. The seventh lens has a convex image-side surface, the eighth lens has positive refractive power, and the imaging lens system satisfies the following conditional expression: 1.10<f3 / f<1.40, where f is a focal length of the imaging lens system, and f3 is a focal length of the third lens.

The invention relates to the field of lens detection, in particular to an automatic focusing type lensometer and a diopter and axial position measuring method.The automatic focusing type lensometer comprises a rack and further comprises a lighting source, an axial position adjusting assembly, a focusing assembly, a lens support, an imaging assembly and an industrial personal computer which are installed on the rack, and a corneal contact lens is placed on the lens support; the axial position adjusting assembly comprises a reticle and an axial position driving mechanism for driving the reticle to rotate; the focusing assembly comprises a focusing lens group and a focusing driving mechanism for driving the focusing lens group to move; the imaging assembly comprises an imaging lens group and a camera; the industrial personal computer is used for controlling the focusing driving mechanism and the axial position driving mechanism and calculating the diopter and the axial position of the corneal contact lens. According to the invention, the automatic adjustment of the focusing amount and the axial position can be realized, the clearest position of the projection pattern is searched through a machine vision algorithm, the reading error caused by manual interpretation is avoided, and the repeated measurement precision is improved.

The invention provides a projection lamp assembly and a vehicle, and belongs to the technical field of vehicle parts. The projection lamp assembly comprises a shell and a metal heat dissipation base which are matched with each other; the first circuit board is arranged in the shell, the bottom face of the first circuit board is attached to one surface of the metal heat dissipation base, and a light-emitting element is installed on the top face of the first circuit board. The heat conduction layer is arranged outside the lens barrel module and attached to the outer wall face of the lens barrel module, one part of the heat conduction layer corresponds to the position of the film assembly, the other part of the heat conduction layer is attached to or makes contact with the top face of the first circuit board, and the heat conductivity of the heat conduction layer is larger than that of the lens barrel module; the beneficial effects of the invention are that the heat conduction layer can guide the heat gathered in the lens barrel module to the first circuit board, so that the heat is released, and the temperature in the lens barrel module is reduced, thereby reducing the deformation of the imaging lens group caused by heating, and avoiding the reduction of the projection definition caused by long-time use.

The invention discloses a method for detecting residual stress of a birefringent crystal, which is characterized by comprising the following steps of: fixing a sample to be detected on a sample loading table; the imaging lens is used for acquiring light rays which sequentially penetrate through the polarizer module, a sample to be detected on the sample loading table, the analyzer module and the camera module in four states in three states that polarization axes of the polarizer module and the analyzer module are mutually orthogonal and a polarization angle is gradually increased by 30 degrees, and in a state that the polarizer module and the analyzer module are in parallel, and the imaging lens is used for acquiring the light rays which sequentially penetrate through the polarizer module, the sample to be detected on the sample loading table, the analyzer module and the camera module in the four states; collecting a light intensity matrix set through a camera module; acquiring a reference light intensity matrix through normalized linear superposition, and performing pixel-by-pixel operation with the reference light intensity matrix on the basis of the first light intensity matrix, the second light intensity matrix and the third light intensity matrix to acquire corresponding phase delay matrixes; eliminating natural birefringence and updating a phase delay matrix by deducting respective overall average phase delay amount pixel by pixel; through pixel-by-pixel weighted stacking, isogradient lines are eliminated, and distribution information of residual stress is obtained.

The invention discloses an inclined wave surface sub-aperture stitching interference detection method based on a spatial light modulator, and relates to the field of optical detection. Light emitted by the laser is collimated and expanded and then enters the polarizing beam splitter; the reflected light is used as a reference light beam, and the transmitted light is used as a test light beam; a test light beam enters the spatial light modulator, is subjected to phase modulation by the spatial light modulator, passes through the lens and then forms standard spherical waves with different inclination angles, and zero detection is carried out on sub-apertures divided in different regions. The spatial light modulator is used as an ideal point source array generator to be matched with the imaging lens, so that required ideal inclined spherical waves can be generated according to different parameters of a measured piece, and compared with a traditional point source generator, the device has high universality. And for a large-aperture complex curved surface, sub-aperture splicing can be realized without moving an interference device, and errors caused by mechanical movement are reduced.

The invention discloses a multi-optical fiber bundle imaging mode dimension space conversion plasma spectrum analysis system, which is characterized in that a two-dimensional optical fiber array comprising M * N optical fiber micropores is arranged on an optical fiber area array, a one-dimensional optical fiber array comprising M * N optical fiber micropores is arranged on an optical fiber linear array, and an optical fiber surface is connected by adopting M * N optical fibers according to a preset connection relation, the two-dimensional optical fiber array is converted into the one-dimensional optical fiber array, the optical grating disperses light transmitted by the optical fiber linear array, then the light is focused by the imaging lens and then is subjected to optical imaging by the CCD detector, and the spectral data conversion module converts a spectral image into a spectral data graph of each optical fiber channel. According to one-to-one correspondence of optical fibers in the two-dimensional optical fiber area array and the one-dimensional optical fiber linear array, the distribution state of elements in the plasma is reconstructed, and multi-optical-fiber sample element content detection is achieved.

The invention relates to the technical field of image sensors, and discloses an illumination imaging method and device for mark recognition, and the device comprises an image sensor array which is used for carrying out the line-by-line exposure collection of target region marks, enabling each line of pixel points to be in an exposure state, and forming a target mark image; the imaging lens system is used for guiding reflected light of the target mark image to be transmitted to the image sensor array and reducing interference of other stray light received by the image sensor array except for illumination of an illumination system of the imaging device; the one or more groups of illumination systems are used for providing specific illumination for the target mark image in a specific window period, so that the exposure intensity of image pixel points in the window period is higher than that in a non-window period; a set of control and computing subsystems; a group of power supply systems; and a group of substrates. According to the invention, the problem of jelly effect of the rolling shutter image sensor is effectively solved, and further application of the rolling shutter image sensor in the field of mark identification is greatly expanded.

An imaging lens module includes an imaging lens unit, an optical folding component and a sensing magnet group. The imaging lens unit has an optical axis. The optical folding component is configured to fold an incident optical path into the imaging lens unit to coincide with the optical axis. The sensing magnet group includes two sensing magnets that are sequentially disposed on the imaging lens unit along a direction in parallel with the optical axis. The sensing magnets are located at the same side with respect to a reference plane that passes through the optical axis and has a normal direction perpendicular to the optical axis. When the sensing magnets are observed from the direction in parallel with the optical axis, images of the sensing magnets are at least partially overlapped. Two adjacent magnetic poles of the sensing magnets are like poles between which there is a repulsive force.

The invention relates to the technical field of optical measurement, in particular to a grating interference measuring device and method based on large-size light spots. The device comprises a light source module which adopts a laser light source with high stability, and the laser light source comprises a wavelength locking device; the collimation and beam expansion module is connected with the light source module; the light splitting module adopts a combined structure of a polarization splitting prism and a lambda / 4 wave plate; the reference grating module comprises a reference grating and a three-dimensional precision adjustment platform; the measuring grating module comprises a measuring grating and a self-adaptive height adjusting mechanism; the imaging module comprises a large-view-field telecentric imaging lens group and a high-speed CMOS image sensor; and a data processing module. One-time measurement of the surface of a large-area object is achieved through the collimation and beam expanding module, efficiency is improved, local interference errors are reduced, the stable laser light source and the reasonable design module are adopted, environmental influences are reduced, optical design is optimized, aberration is reduced, automatic and intelligent measurement is achieved, and convenience and efficiency are improved.

The invention provides a polarization camera imaging system based on aperture coding. The polarization camera imaging system comprises an imaging lens, a polarization dimension coding aperture and a polarization detector. The imaging lens comprises a front-group lens and a rear-group lens, the front-group lens is arranged in front of an aperture diaphragm of the imaging lens, and the rear-group lens is arranged behind the aperture diaphragm of the imaging lens; the polarization dimension coding aperture is arranged at an aperture diaphragm of the imaging lens, and the polarization detector is arranged at an image surface of the imaging lens; the front group of lenses consists of a plurality of lenses and is used for transmitting the collected target light information to the polarization dimension coding aperture; the polarization dimension coding aperture is used for modulating the polarization dimension of the incident light; the rear group of lenses consists of a plurality of lenses and is used for collecting target light information modulated by a polarization dimension coding aperture and transmitting the collected signal to a polarization detector; and the polarization detector is used for imaging according to the incident signal of the rear group of lenses, and the system can improve the upper limit of the dynamic range of the imaging camera by inserting a polarization dimension coding aperture at the diaphragm of the lens.

The invention discloses a reflector structure for a projection imaging lens, which comprises a reflector body, the reflector body is placed in an optical projection imaging lens with more than two lenses, and the reflector body comprises a middle light-passing area, a middle light-passing area and a middle light-passing area, so that light of the optical projection imaging lens is emitted through the middle light-passing area to become direct emergent light; the upper end of the first reflecting region is small and the lower end is large; the upper end of the second reflecting region is large and the lower end is small; the optical projection imaging lens is vertically placed, the light source or the image source is arranged below the optical projection imaging lens, and the lens is arranged above the optical projection imaging lens; the reflector body is configured to be matched with a circular projection imaging lens in rotational symmetry or a projection imaging lens in a non-rotational symmetry structure. The surface brightness and uniformity of the light-emitting surface of the projection lens are improved.

The embodiment of the invention provides an AR light machine module, AR glasses, an AR display system and an AR display method. The AR light machine module comprises a light source, an illumination waveguide, an imaging lens, an LCOS panel, a diaphragm and a polarization control assembly. The light source provides illumination light; the illumination waveguide is provided with an entrance pupil area and an exit pupil area, and the illumination light is coupled in from the entrance pupil area and is coupled out from the exit pupil area; the imaging lens is used for geometrically amplifying the illumination light coupled out of the exit pupil region; the LCOS panel is used for carrying out phase modulation on the amplified illumination light and forming imaging light, and the imaging light is projected to the exit pupil area through the imaging lens and then is emitted; the diaphragm is arranged on an imaging light path emitted by the exit pupil area and is used for adjusting the size of an exit pupil; the polarization control assembly comprises a polarization beam splitting film, and the polarization beam splitting film is located between the exit pupil area and the diaphragm and used for reflecting S-line polarized light and transmitting P-line polarized light.

An imaging lens system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, sequentially disposed at intervals from an object side of the imaging lens system. The imaging lens system satisfies 1.5<Nd5<1.6, 30<V5<50, and TTL / 2IH<0.730, where Nd5 is a refractive index of the fifth lens, V5 is an Abbe number of the fifth lens, TTL is a distance from an object side surface of the first lens to an imaging plane, and 2IH is a diagonal length of the imaging plane.

The invention discloses a multi-component insulating gas multispectral imaging device and an application method thereof, belongs to the technical field of electric power safety detection, and relates to a problem how to design a multifunctional, miniaturized and portable multi-component insulating gas multispectral imaging device. Through combination of the visible light camera and the infrared imaging lens, a visible light image of an electric power scene can be provided, infrared detection of insulating gas can be realized, and the application range of the device is expanded; the infrared characteristics of the multi-component insulating gas can be extracted through a plurality of broadband optical filters; infrared images of the multi-component insulating gas are collected, and high-precision gas detection and analysis are realized in combination with the data processing capability of the signal processing board; through the view field adjusting function of the infrared imaging lens, clear imaging results can be obtained at different distances and angles; the device has the advantages of multiple functions, high precision, high portability, high data processing efficiency and the like, is suitable for detecting and monitoring insulation gas leakage of power equipment, and has a wide application prospect.