52 results about "Cylindrical lens" patented technology

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

The embodiment of the present disclosure provides a cylindrical lens grating imprint material coating parameter determination method and device. The cylindrical lens grating imprint material coating parameter determination method comprises: determining the coating volume of the imprint material according to at least the cylindrical lens volume of the cylindrical lens grating, wherein the imprint material is used for imprinting on a substrate as the cylindrical lens grating.

The application discloses a laser shaping module, a projection light source system and a projection device, wherein the laser shaping module comprises a laser device for outputting a laser beam, and the laser beam has different divergence characteristics in a fast axis direction and a slow axis direction; a spherical lens is arranged on the light output side of the laser device; a cylindrical lens module is arranged on the light output side of the spherical lens; the cylindrical lens module has opposite first and second working surfaces along the propagation direction of the laser beam; the cylindrical axis of the first working surface is parallel to the fast axis direction and is used for shaping the laser beam in the slow axis direction; the cylindrical axis of the second working surface is parallel to the slow axis direction and is used for shaping the laser beam in the fast axis direction; and a pump light source is used for receiving the shaped laser beam and is pumped and excited under the action of the laser beam. The application compensates for the difference between the divergence characteristics of the laser beam in the slow axis direction and the fast axis direction by arranging the cylindrical lens module, thereby improving the quality of the pump beam and the pumping efficiency.

This invention discloses a widescreen anamorphic lens that can switch between horizontal and vertical orientations. It includes an anamorphic lens body, a mounting ring fixedly connected to one end of the anamorphic lens body, and a lens mount that is axially fixed and circumferentially rotatable relative to the mounting ring. When the anamorphic lens body rotates relative to the lens mount, it has a horizontal shooting position where the cylindrical lens group compresses light laterally and a vertical shooting position where the cylindrical lens group compresses light vertically. The mounting ring is provided with a locking component for locking with the lens mount. The locking component can lock the anamorphic lens body in either the horizontal or vertical shooting position. The mounting ring also has an unlocking component for unlocking the locking component from the lens mount. By rotating the anamorphic lens body, rapid switching between horizontal and vertical widescreen shooting can be achieved, ensuring the continuity of video footage and solving the problems of astigmatism and distortion that are easily caused by rotating traditional lens mounts.

The present invention relates to an electrically adjustable, multi-frequency, multi-beam, stand-alone antenna comprising: a first electromagnetic lens, a second electromagnetic lens, a mounting plate, a reflector plate, oscillator units A1 to A32, oscillator units B1 to B8, and phase shifters C1 to C12. The first and second electromagnetic lenses are both cylindrical lenses. Oscillator units A1 to A32 operate at a higher frequency than oscillator units B1 to B8. The first electromagnetic lens, the second electromagnetic lens, the reflector plate, and the mounting plate are fixed together. Oscillator units A1 to A32 and oscillator units B1 to B8 are all mounted on a reflective surface of the reflector plate. Phase shifters C1 to C12 are all mounted on the mounting plate.Each set of four high-frequency oscillators and each set of two low-frequency oscillators are connected to a phase shifter. The present invention is characterized by a simple structure, scientific design, small size, flexible beam direction configuration, etc.

This invention provides a 3D printer light source module, comprising: a display screen light source and a lens module. The display screen light source has multiple pixel units arranged in an array. The lens module includes multiple cylindrical lenses arranged in an array. The positions of the cylindrical lenses correspond to the pixel units of the display screen light source. The cylindrical lenses are independent of each other. One end face of each cylindrical lens is the light-incident surface, and the other end face is the light-exit surface. The refractive index of each cylindrical lens gradually increases from the outer periphery to the center. This invention allows the display screen light source to be separated from the material tank and prevents the real image from being excessively magnified.

The invention relates to a screen (10) for displaying an autostereoscopic image with N viewpoints ordered from 1 to N, formed from a series of even-numbered viewpoints and a series of odd-numbered viewpoints, the screen comprising a panel (30) of pixels arranged in ordered rows (L1, L2, L3, L4) and columns, each pixel being composed of a plurality of active subpixels (SP) in 10 different colors, each assigned to a viewpoint of the image; an ordered array (40) of cylindrical lenses (42) mounted on the pixel panel, each lens being inclined relative to the columns of the panel by an angle (α) equal to arctan (1 / 6) such that the series of even-numbered viewpoints and the series of odd-numbered viewpoints of the autostereoscopic image can be interleaved with one another.

An example plasma monitoring apparatus includes a monitoring structure fixed to a sidewall of a plasma chamber housing such that the monitoring structure is in contact with a viewport located in the sidewall of the plasma chamber housing, a cylindrical lens provided inside the monitoring structure and located at a front end of the monitoring structure, the cylindrical lens configured to receive a plurality of rays of plasma emission light emitted from a plasma space of interest inside the plasma chamber housing, and a plasma detector provided inside the monitoring structure and located at a rear end of the monitoring structure, the plasma detector configured to detect the plurality of rays of plasma emission light transmitted through the cylindrical lens. The cylindrical lens includes a side surface in a form of a circumferential surface convex or concave in a second horizontal direction.

The application discloses a free surface column lens design method for realizing MEMS uniform light emission, and relates to the field of optical lens design. The method comprises the following steps: a mapping relationship between MEMS light emission energy and a target plane area is established; the vertex coordinates of a free surface generatrix are given, and the coordinates of the rest points on the free surface generatrix are determined according to the mapping relationship; all the points are connected to form the free surface generatrix, and a free surface column lens is constructed based on the free surface generatrix; the lens is arranged between the MEMS and the target plane, and then the light energy reaching each position of the target plane after the exit light beam scanned by the MEMS is refracted by the lens is equal. The MEMS cooperates with the lens to provide a surface structure light with high uniformity and high energy utilization rate for subsequent three-dimensional reconstruction.

The application discloses a low-cost universal virtual phase contrast method and device based on a cylindrical lens; the method comprises the following steps: adding a cylindrical lens in a common bright field microscope of a Kohler illumination structure, so that the illumination light source forms asymmetric illumination, and a bright field image is obtained; a strong image carries more phase information; the obtained bright field image is input into a conditional generative adversarial neural network under credibility negative feedback after training, and a virtual phase contrast image is generated, so that the effect equivalent to a standard phase contrast image is realized at low cost. The application not only realizes the effect similar to the standard phase contrast microscope at low cost, but also is superior to the image of the standard phase contrast microscope in some applications (cell segmentation, cell recognition, etc.), and expands the application potential of the application in the fields of biomedicine, material science and the like.

The application discloses a light spot shaping microlens based on a two-photon polymerization technology and a manufacturing method thereof, and relates to the technical field of optics and micro-nano processing technology. The light spot shaping microlens based on the two-photon polymerization technology is a cylindrical lens array structure, comprises at least two cylindrical lenses arranged in parallel in sequence, and the fixed arrangement of the cylindrical lenses is realized through support structures on both sides of the cylindrical lenses, and the straight surfaces of the cylindrical lenses are parallel; the cylindrical lens array structure is used for modulating a circular laser spot of incident laser into an elliptical spot. The cylindrical lens array structure is prepared by adopting the two-photon polymerization technology, the machining precision reaches the nanometer level, the accurate preparation of a three-dimensional complex structure can be realized, and the problem that a micro-scale three-dimensional optical structure cannot be prepared by using a traditional process is solved; the prepared microlens can be integrated with a VCSEL (Vertical Cavity Surface Emitting Laser) efficiently, the accurate modulation from a circular spot to an elliptical spot is realized, and the demand of high-precision micro-nano displacement detection is met.

This invention relates to a tube lens compatible with high-NA objectives, a rapid automated optical inspection system and method. The tube lens includes a lens assembly comprising a first cemented lens with positive optical power, a second cemented lens with negative optical power, and a third cemented lens with positive optical power, arranged sequentially along the principal optical axis. The first cemented lens is disposed on one side of the object being tested. The first cemented lens comprises a first lens and a second lens cemented together; the second cemented lens comprises a third lens and a fourth lens cemented together; and the third cemented lens comprises a fifth lens and a sixth lens cemented together. The design of this invention enables a 1.4X tube lens, compatible with high-NA objectives. Its lens assembly includes multiple cemented lenses forming a positive-negative-positive structure, which improves the pixel resolution, optical resolution, and minimum defect size detection capability. It also has a long front working distance, adaptable to both vertical and horizontal inspection optical paths.

The utility model provides a kind of polishing processing device of miniature cylindrical lens, it is related to cylindrical lens polishing field, and it includes: the upper side of the base is equipped with two groups of polishing components, and polishing component includes fixed plate, and slidingly connected with slide plate, and fixed plate outside is equipped with hydraulic cylinder, slide plate inside is slidingly connected with lifting frame, and the inside end of lifting frame is equipped with polishing wheel, and the upper end of lifting frame is equipped with electric push rod, the upper side of the base is equipped with dust collection box, and the inside of dust collection box is equipped with baffle, the both sides of baffle are equipped with dust suction port, and the lower side of dust suction port and in the box wall of dust collection box are equipped with connecting hole, simultaneously, the outer end of connecting hole is connected with suction pump by dust extraction pipe, the upper end of baffle is fixed with clamping component, and clamping component includes positioning plate, positioning plate upper end is equipped with clamping groove, and clamping groove upper side is equipped with clamping plate.The utility model has the effect of polishing the both ends of cylindrical lens simultaneously to improve work efficiency, and has the effect of collecting dust.

AUTOSTEREOSCOPIC DISPLAY SCREEN EQUIPPED WITH A VERY HIGH DEFINITION PIXEL PANEL The invention relates to a screen (10) for displaying an autostereoscopic image with N viewpoints ordered from 1 to N, consisting of a series of even viewpoints and a series of odd viewpoints, the screen comprising a panel (30) of pixels arranged by rows (L1, L2, L3, L4) and by ordered columns, each pixel being composed of a plurality of active sub-pixels (SP) of different colors, each assigned to a viewpoint of the image; an ordered array (40) of cylindrical lenses (42) mounted on said pixel panel, each lens being inclined with respect to the columns of the panel at an angle (α) equal to arctan (1 / 6) so as to be able to interleave said series of even viewpoints and said series of odd viewpoints of the autostereoscopic image. Figure for the abbreviation: Figure 1

A system and methods based on light sheet microscopy (LSM) and optically detected magnetic resonance (ODMR) are provided. The system includes a cylindrical lens; an objective lens combined with the cylindrical lens to generate a light sheet for exciting a sample from one side; a collection objective lens for collecting fluorescence generated by the sample; a galvo mirror for scanning the light sheet to realize three-dimensional imaging and sensing; an antenna for introducing microwave with frequency sweeping to the sample; and an image sensor for collecting the fluorescence of the sample under each microwave frequency point with same exposure time to obtain ODMR signals. The sample is fixed on a 3D stage and the position of the sample is adjustable. The temperature sensitivity using the LSM-ODMR method can reach a few K / √{square root over (Hz)}.

The application discloses a plane prescription lens phase coding method and system applied to the technical field of plane prescription microstructure design, and the method comprises the following steps: obtaining prescription parameters, wearing posture parameters and manufacturing assembly constraints, performing equivalent compensation on the prescription and executing axis position rotation in a plane lens coordinate system, further generating a target wavefront, a two-dimensional phase field and a height field, performing local power continuity checking and manufacturability checking on the phase field, and outputting a phase diagram, a height diagram, a manufacturing file and a parameter list, and the system comprises an input module, a coordinate transformation module, a phase coding module, a manufacturability evaluation module and an output module. Through the above scheme, the spherical lens, the cylindrical lens and the axis position can be written into the plane microstructure, and the local image quality continuity and the manufacturing realizability can be controlled simultaneously.

This invention discloses a corrective lens belonging to the field of lens technology, comprising: a first region, a second region, a third region, a fourth region, a fifth region, a sixth region, a seventh region, an eighth region, and a ninth region; the first region is the central area, composed of a basic spherical lens and a cylindrical lens, used for precise refractive correction; the lens adopts a nine-square grid layout, which prevents reversal naturally and has a significant effect on myopia correction.

A laser processing device 1 comprises: a laser emission unit 10 that emits a first laser beam L1 in which a beam cross-section has an annular shape and a second laser beam L2 in which a beam cross-section has a shape surrounded by the first laser beam L1; a prism 20 that transmits and thereby divides the first laser beam L1 and the second laser beam L2 to invert a beam profile; and a cylindrical lens 30 that transmits and thereby condenses the divided first laser beam L1 and second laser beam L2. The laser processing device 1 emits emission light Lout in which a beam cross-section has a flat shape.

This invention discloses an ultra-thin, large-area, uniform collimated backlight system for 3D displays, belonging to the field of free-form stereoscopic 3D displays. The collimated backlight includes a uniform panel light source, an orthogonal prism film composed of a first prism film and a second prism film, an aperture array layer, and an orthogonal cylindrical lens array composed of a first cylindrical lens array and a second cylindrical lens array. Both the orthogonal prism film and the orthogonal cylindrical lens array are double-layer structures, with the edges of the two prism films orthogonal to each other. The double-layer cylindrical lens array is arranged orthogonally to each other, and the cylindrical lens array is composed of cylindrical lens unit arrays. The upper and lower cylindrical lens arrays work together to achieve beam collimation and homogenization. The edges of the opposing prism film form a certain angle with the direction of the cylindrical lens arrangement, further homogenizing the light spot.

This application discloses a method, apparatus, storage medium, and device for detecting QR codes on the outer wall of a lens. The method includes: controlling a coaxial main lens to perform a single exposure to obtain a stretched annular image of the cylindrical lens under test; the stretched annular image is formed by the image of the circumferential outer wall of the cylindrical lens under test being reflected once by a continuous conical reflecting surface of a tilted annular mirror to the imaging target surface of the coaxial main lens; identifying the inner and outer annular contours in the stretched annular image, and defining a double-ring region of interest containing the target QR code based on the inner and outer annular contours; extracting the annular image within the double-ring region of interest, and performing a reverse mapping reconstruction from polar coordinates to rectangular coordinates on the annular image to unfold it into a planar image; locating the boundary of the target QR code in the planar image, and cropping the target QR code image from the planar image based on the located boundary for information recognition. This improves the stability and accuracy of QR code detection.

The present application relates to the technical field of optical interference detection, in particular to a light beam uniform shaping method for high-precision dual-wavelength interference measurement and a dual-wavelength interference measurement device based on the same. By means of the cooperation of the Powell prism, the first cylindrical lens and the second cylindrical lens in the light beam shaping and interference measurement module, the Gaussian light beam is uniformly shaped, and the light beam energy is redistributed, so that the brightness distribution of the measurement light beam in the y direction tends to be uniform, the overall quality of the interference fringe imaging is improved, and the stability of the fringe signal of each point in the measurement area is ensured. Through the light beam uniform shaping optimization, the nonlinear distortion of the interference fringe spacing caused by the linear Gaussian light beam is effectively suppressed, the drift of the fringe spacing along the light beam expansion direction is weakened, the fringe spacing distribution in the measurement area is more uniform, combined with the precise light splitting of the dual-wavelength design and the filter, the measurement uncertainty of the fringe spacing is greatly reduced, and the measurement precision of the measured object is effectively improved.

A tunable semiconductor laser with an external resonator, comprising a semiconductor laser (10), a collimating lens (20), a cylindrical lens (30), a diffraction grating (40) and a partially reflective mirror (50), wherein the collimating lens (20) is located near a focal length on one side of the cylindrical lens (30) and a center point of the diffraction grating (40) coincides with a position at a focal length on the other side of the cylindrical lens (30), and wherein a groove direction of the diffraction grating (40) is the same as a polarization direction of a light beam transmitted via the diffraction grating (40) to the partially reflective mirror (50);wherein the normal of the diffraction grating (40) forms a Littrow angle with a transmission direction of the light beam transmitted to the partially reflective mirror (50), wherein a transmission direction of a light beam passing through the partially reflective mirror (50) is perpendicular to the partially reflective mirror (50); wherein the cylindrical lens (30) is used to move perpendicular to a transmission direction of a light beam transmitted to the cylindrical lens (30) in order to tune a wavelength of an output light beam.

The present application relates to a kind of dual-optical arm dynamic single-pixel imaging system and method based on Radon spectrum, the imaging system includes beam splitter, dove prism, plano-convex cylindrical lens, spatial light modulator, single-pixel detector and imaging lens.One optical path in dual-optical arm single-pixel imaging system is used for positioning, and the other optical path is used for single-pixel imaging.Positioning light path is completed by optical element dove prism, plano-convex cylindrical lens and linear array detector for fast positioning, and imaging light path is compensated according to the positioning result to complete the reconstruction of moving target for modulated speckle of light field.Adopting the imaging system and method can avoid the problem of increasing sampling rate caused by traditional positioning method, and also can avoid the problem that positioning speckle is vulnerable to noise, provides an effective way for moving single-pixel imaging.

Arrangement of optical elements for forming large-area structures (9) with linear structural elements on surfaces of components and / or in the volume of components by means of direct laser interference structuring and interference lithography, in which a laser beam (8) is directed onto an optical element (1) which is designed to split the laser beam (8) into at least two partial beams (8.1 and 8.2), wherein the partial beams (8.1 and 8.2) strike at least one first cylindrical lens (2) with at least one convex surface and are aligned such that they strike at least one second cylindrical lens (3), and the at least one first cylindrical lens (2) and / or the at least one second cylindrical lens (3) are designed and arranged at a distance relative to the first cylindrical lens (2) and the component such that the partial beams (8.1 and 8.2)2) are focused in the direction of a component in a common plane, and the partial beams (8.1 and 8.2) interfere with each other in a region, whereby rectangular or elliptical structures (9) of a predefinable length in an axis direction that is oriented perpendicular to the optical axis of the laser beam (8), and with linear structural elements, predefinable structure period Λ, which are arranged parallel and next to each other, can be formed as a result of a locally defined material removal and / or a modification of component material, which is achievable by the energy input of the partial beams (8.1 and 8.2) into the component material in the region in which the partial beams (8.1 and 8.2) interfere with each other.

The application provides a dual-camera misregistration sampling imaging OCT system and method, wherein the system comprises: a low-coherence light source module for providing a light source; an interference microscopic light path module for splitting the light source by a first beam splitter to modulate information, obtaining interference between reflected light and scattered light after action, and obtaining an interference light beam through a cylindrical lens convergence; a dual-channel detection module for splitting the interference light beam by a second beam splitter, collecting through a spatial sub-pixel misregistration dual camera to obtain a first path image signal and a second path image signal; a synchronous control module for controlling the dual camera to synchronously collect; a data processing module for obtaining a synchronous sequence comprising the first path image signal and the second path image signal, demodulating based on the synchronous sequence and synthesizing a sparse image, and restoring a physical image based on the sparse image using a deep neural network model. The high-pixel image synthesized by the application has higher image sharpness and signal-to-noise ratio while retaining the OCT layering capability.

The present application relates to the technical field of body phase nanometer bubble characterization, and discloses a dark field differential dynamic microscopic system and method for body phase nanometer bubble characterization.The system comprises an illumination light path and a measurement light path.The illumination light path comprises a laser, a mirror and a cylindrical lens arranged in sequence.The measurement light path comprises a sample cell, a microscope objective, a first lens, a second lens, a third lens and a CMOS high-speed camera arranged in sequence, and the microscope objective, the first lens, the second lens, the third lens and the CMOS high-speed camera are located on the same axis.The present application obtains the motion information of the body phase nanometer bubble by the frequency domain change of the microscopic motion image, thereby calculating the particle size.Compared with the existing characterization technology, the present application greatly reduces the measurement time and instrument cost, solves the defect that the existing characterization technology only uses low concentration samples for characterization, is suitable for a wide range of sample concentrations, and realizes the efficient and accurate characterization of the body phase nanometer bubble under the condition of visualization.