455 results about "Cylindrical lens" patented technology

The utility model discloses a deformable lens, which comprises a first spherical lens group, a second spherical lens group, a first cylindrical lens group, a third spherical lens group, a second cylindrical lens group, a fourth spherical lens group and a twentieth lens which are sequentially arranged from an object space to an image space, the focal lengths of all the lens groups meet the following conditions: 1.4 lt; f (G1-G7) Y / f (G1-G7) Xlt; 1.6); 1lt; 1lt; f (G2) X / f (G1-G4) Xlt; -0.7,-0.7; -2lt;-2lt; f (G3) X / f (G1-G4) Xlt; -1.3,-1.3; 361t; 361t; f (G5) Y / f (G5-G7) Ylt; 24); 0.8 lt; f (G1-G4) X / f (G5-G7) Xlt; 1.2; 1.1 lt; 1.1 lt; f (G1-G4) Y / f (G5-G7) Ylt; and 1.7. The integrated design is adopted, so that the lens is small in size, and meanwhile, the optical performance of high resolution, low respiration, low distortion, 1.5 X high magnification and the like is obtained.

The invention discloses a calibration device with a spectrum self-calibration function and a high-resolution spectrum calibration method thereof. The device comprises a narrow-band light source, a broadband light source, an optical fiber isolator, a coupler, an interference system, a multi-way switch, an FP (Fabry-Perot) cavity, a collimator, an orthogonal dispersion system and a computer, wherein the orthogonal dispersion system consists of a cylindrical lens, a reflector, a virtual phase array, a grating, a focusing lens and an industrial camera; according to the device, different light source paths are gated, FP cavity modulation and orthogonal dispersion system light splitting are utilized, and an industrial camera is combined to receive light signals. According to the method, the mapping relation between pixels and wavelengths can be established, the two-dimensional spectrum is compressed into the one-dimensional calibration spectrum through light intensity modulation and normalization processing, the calibration process of the orthogonal dispersion system is simplified, and the measurement precision is improved; and system drift can be compensated in real time through self-checking calibration, and the reliability of a measurement result is ensured, so that accurate calibration and measurement of a high-resolution spectrum can be realized.

The invention relates to a laser beam shaping system and method based on an optical waveguide, and belongs to a beam shaping technology. Comprising a semiconductor laser, a fast axis collimating lens, a slow axis collimating lens, a beam expanding system, a focusing lens and an optical waveguide which are sequentially arranged from left to right, the fast axis collimating lens is a plano-convex cylindrical lens and is used for collimating the fast axis direction of the light beam; the slow axis collimating lens is a plano-convex cylindrical lens and is used for collimating the slow axis direction of the light beam; the beam expanding system comprises a front plano-concave cylindrical lens and a rear plano-convex cylindrical lens and is used for expanding the light beam width in the slow axis direction to be consistent with the light beam width in the fast axis direction; the focusing lens is a plano-convex lens and is used for focusing a light beam to the input end of the optical waveguide; the section of the input end of the optical waveguide is rectangular, the section of the output end is circular, and the optical waveguide is used for shaping rectangular light spots into circular light spots. The light beam is efficiently transmitted in the optical waveguide, and the light beam is gradually shaped into a circular light beam through the transition structure.

The invention discloses a coherent interference-based coaxial transceiving line scanning three-dimensional profile measurement system and method. The system comprises a low-coherence light source; the beam splitter is used for collimating light emitted by the low-coherence light source and then dividing the light into two paths; the measuring light is focused into a linear light beam through the cylindrical lens and is emitted to the surface of the to-be-measured sample, and the measuring light reflected by the surface of the to-be-measured sample returns to the beam splitter along the original path; the reference light is emitted to a reference mirror with a certain inclination angle and is reflected back to the beam splitter through the reference mirror; the measuring light reflected by the surface of the sample to be measured and the reference light reflected by the reference mirror are subjected to beam combination interference through a beam splitter and are imaged to enter a camera for interference pattern acquisition; the signal processing system is used for processing the interference patterns to obtain height distribution of the to-be-measured sample on a line field, and three-dimensional profile measurement of the to-be-measured sample is realized by transversely moving or transversely scanning the to-be-measured sample and overlapping the interference patterns measured at different positions. Therefore, high-efficiency measurement can be realized while the micro-nano precision is kept.

The invention provides a solution concentration real-time detection method based on cylindrical lens focusing offset, which comprises the following steps: step A, laser emitted by a laser diode is collimated into parallel light through a plano-convex lens, the parallel light is emitted into a sample cell through a glass window, and the sample cell is used for detecting the concentration of a sample; and then the light is emitted by the cylindrical lens and is imaged on the image sensor. B, the parallel light is imaged into a light spot on the image sensor after being emitted by the cylindrical lens, the image sensor is driven by the stepping motor to move, the minimum light spot is found, the moving distance of the image sensor is recorded, and the solution concentration change is inversed through the moving distance; by introducing a cylindrical lens light path amplification mechanism, the detection precision is remarkably improved, the temperature drift is effectively inhibited, and the defect of insufficient sensitivity in the prior art is overcome.

The invention relates to the field of agricultural equipment, and provides an optical weeding system and method. The optical weeding system comprises a base and a solar weeding device, the solar weeding device is arranged on the base and comprises a lighting assembly, a collimating lens, a light guide assembly and a cylindrical lens, the lighting assembly comprises a supporting frame and a Fresnel lens, and the Fresnel lens is arranged on the upper portion of the supporting frame. Sunlight is focused to a focus through the Fresnel lens to form a high-energy light spot, light output by the Fresnel lens is collimated through the collimating lens, and the focused light is output through the cylindrical lens to form a linear high-temperature light spot on the ground; solar energy of renewable clean energy is directly utilized to form a light knife for physical thermal cutting weeding, consumption of non-renewable energy sources is reduced, and the use cost is reduced; due to the fact that optical weeding is adopted, chemical reagents are not needed, and pollution to soil and water sources is avoided.

The invention discloses a one-dimensional ultra-wide field-of-view ultra-high spectral resolution dispersion coherent imaging spectrometer, which belongs to the technical field of spectral imaging, and comprises a first microlens array used for obtaining incident light of a one-dimensional ultra-wide field-of-view in a horizontal plane; the plurality of optical fibers are used for transmitting incident light of a one-dimensional ultra-wide field of view; the second micro lens array is used for collimating incident light from each optical fiber into broadband parallel light beams; the grating beam splitter interferometer is used for dispersing the broadband parallel light beams into a plurality of narrow-band parallel light beams with different propagation directions; the cylindrical lens is used for converging the two paths of coherent light of each narrow-band parallel light beam to a target block of the detector, and converging the narrow-band parallel light beams with different propagation directions to different target blocks respectively; and the detector is used for obtaining a continuous broadband ultra-high resolution spectrum according to the two paths of coherent light received by each target block. According to the invention, a one-dimensional ultra-wide field of view is obtained in a horizontal plane, and ultra-high spectral resolution can be obtained.

The invention discloses a system and method for generating, regulating and controlling a partially coherent space-time light field. The system comprises a pulse shaping assembly composed of a plurality of optical elements and an incident light source used for providing a completely coherent ultrafast pulse light field. An optical element in the pulse shaping assembly comprises a first blazed grating, a first cylindrical lens, a two-dimensional dynamic holographic modulator, a second cylindrical lens and a second blazed grating which are sequentially arranged in the light field propagation direction. The focal lengths of the first cylindrical lens and the second cylindrical lens are the same, and the distance between the adjacent optical elements is equal to the focal lengths of the first cylindrical lens and the second cylindrical lens; the two-dimensional dynamic holographic modulator is used for loading a specific complex amplitude modulation function to reconstruct the spatial-spectral characteristics of the light field. According to the invention, the two-dimensional space-spectrum function of the pulse is dynamically modulated, the generation of the partially coherent space-time wave packet is realized, and the amplitude and structure distribution of the space-time coherence can be designed and regulated as required.

The invention relates to the technical field of 3D display screens, in particular to a naked eye 3D liquid crystal display screen which comprises an outer shell and an inner shell located in the outer shell, a backlight layer is arranged on the innermost layer in the inner shell, and developing layers are sequentially arranged on the outer side of the backlight layer; the developing layer is formed by combining a 2D display layer and a 3D effect layer formed by arranging columnar perspective films so as to enhance the developing effect, and a touch layer and a protective layer are sequentially arranged on the outer side of the developing layer. The developing layer comprises a 2D display layer composed of a lower polaroid, a liquid crystal and an upper polaroid, and a 3D effect layer composed of a display panel and a cylindrical lens grating layer. According to the naked-eye 3D liquid crystal display screen, the 3D display effect can be enhanced, the interaction effect of the display screen can be improved, 3D display work can be better used, and meanwhile long-term efficient use of the display screen can be guaranteed.

The invention provides a multi-focus excitation confocal fluorescence microscopic imaging flow cytometry screening method. The method is characterized in that a laser beam generates three laser beams through a spatial light modulator, and the three laser beams are coherently superposed in a focal plane of a microscope objective to generate a two-dimensional optical lattice light field. And after the other laser beam is shaped by the cylindrical lens, linear laser optical tweezers are realized through the microscope objective, cells to be detected in an imaging detection area of the micro-flow chip are captured, and accurate active optical control on the rotation angle of the cells to be detected is realized. In a cell rotation process, a two-dimensional optical lattice light field rapidly scans in a focal plane at different angles, and a fluorophore in the cell is excited to generate a fluorescence signal. The confocal pinhole array installed at the position conjugate with the focal plane eliminates background fluorescence, a high-spatial-resolution fluorescence image of a three-dimensional structure in the cell is obtained, and cell screening is achieved. The method provided by the invention has the characteristics of high detection rate, high accuracy and the like, and has wide application prospects in the research fields of biology, medicine and life science.

A rapid optical tissue scanner includes: a light source unit for irradiating a sample with a light source beam; a cylindrical lens for transforming the light source beam into a light sheet; a sample mounting unit on which the sample is mounted; an objective lens disposed between the cylindrical lens and the sample mounting unit to irradiate the sample with the light source beam transformed into a light sheet; and a photographing unit for receiving an excitation beam, which is obtained by excitation from the sample, from the objective lens and photographing image information of the sample.

A multi-junction laser-diode module includes (a) a multi-junction laser diode having a plurality of laser junctions stacked in a vertical dimension parallel to the fast-axes of the laser beams emitted by the laser junctions, (b) a fast-axis cylindrical lens collimating each laser beam in the fast axis, whereby the laser beams emerge from the fast-axis cylindrical lens with mutually nonparallel propagation directions, (c) a transmissive beam-deflecting element that deflects the laser beams in the fast-axis dimension after the fast-axis cylindrical lens to make their propagation directions parallel, and (d) a slow-axis cylindrical lens configured to collimate each laser beam in the slow axis. The transmissive beam-deflecting element corrects for the propagation-direction discrepancy between the laser beams, in the fast-axis dimension, caused by fast-axis collimation. The multi-junction laser-diode module can thereby produce a laser beam bundle suitable for high-brightness fiber-coupling.

The invention provides a display unit based on LED sub-pixels and a display device. The display unit based on the LED sub-pixels comprises a pixel point array layer; the collimating lens layer is used for correspondingly arranging a collimating lens for each pixel point; the shading support is arranged on the surface of the collimating lens layer, and keels of the shading support are arranged between the pixel points and used for avoiding crosstalk between the pixel points; the cylindrical lens layer is arranged on the surface of the shading support, a cylindrical guide lens is arranged corresponding to the collimating lenses in the same column in a transverse arrangement mode, and the cylindrical guide lens comprises a lens for modulating emergent light to face the first direction and a lens for modulating emergent light to face the second direction. According to the structure, the emergent direction of emergent light is adjusted through the collimating lens according to the design of the lens, then the emergent direction of the emergent light is adjusted through the cylindrical lens, all the layers of structures can be achieved in batches in a 3D printing or injection molding mode, all the layers of lenses in the lens set are printed in a layered mode, parameters such as the focus, the focal length and the light emergent angle of the lenses are optimized, and therefore the light emitting efficiency is improved. The technical scheme is simple and easy to implement.

The invention provides a spliced detector flatness large-flux in-situ detection method which comprises the following steps: a light source emits a light beam which is compressed by a cylindrical lens, then is dispersed by a dispersion prism and respectively enters the edges of two adjacent detectors, and the two light beams are reflected by the surfaces of the detectors and then converge to generate dispersion stripes; a fixed difference calibration mode is adopted to calibrate stripe slope singularity caused by edge stripe variation in the dispersion stripe forming process; a band elimination filter is used for generating band elimination of a specific wave band in the dispersion fringes, and the channel spectrum is tested by analyzing the characteristics of the band elimination; the edge position of each detector is finely adjusted by using a dispersion prism, and the edge position of each detector is adjusted through deviation of a pupil position in combination with multi-point light emitted from one side of a wide-angle optical system by using an optical fiber interconnection system. According to the invention, the confocal and co-phase adjustment speed and precision of the spliced detector are greatly improved, and the regulation and control requirements of extremely high information flux and rapid convergence of a large-aperture system are met.

A display device includes a light-emitting panel comprising a plurality of pixels, wherein a given pixel comprises sub-pixels of at least two different colours (R, G, B, W) that are arranged sequentially along a first direction (A-B, H-I, M-N, K-L, Y-Z, U-V). The display device further includes a lenticular array arranged on an optical path of the light-emitting panel, the lenticular array including a plurality of lenticular lenses, wherein a longitudinal axis (X-Y) of a given lenticular lens aligns with the first direction. A processor is configured to generate drive signals for the plurality of pixels, based on a light field image to be displayed and to drive the plurality of pixels using the drive signals to display the light field image.

The invention provides a high-speed and multi-dimensional spatial light field regulation and control device, which can realize high-speed regulation of multiple dimensions such as amplitude, phase, polarization and the like of a spatial light field. Comprising a pumping regulation and control system, a collimation focusing shaping system and a laser resonance system which are sequentially installed through a three-dimensional adjusting frame along a light path, and the three systems are located on the same horizontal optical axis and are vertically arranged. The pumping regulation and control system comprises a signal generator, a driving circuit and a pumping source; the collimating focusing shaping system comprises a collimating lens, a conical lens or a cylindrical lens and a focusing lens, the laser resonance system comprises a laser crystal and a laser resonant cavity, and the laser resonant cavity comprises a compact parallel plane cavity and an open type optical resonant cavity. Laser pulses with different amplitude characteristics can be output at different moments; laser pulses with different phase characteristics can be output at different moments; and laser pulses with different polarization characteristics can be output at different moments.

The invention belongs to the technical field of 3D display, and relates to a light field 3D display and a light field 3D display method. The light field 3D display comprises a directional light-emitting 2D display screen used for emitting a plurality of first light rays, a cylindrical lens array used for carrying out direction modulation on the plurality of first light rays emitted by the directional light-emitting 2D display screen, and an optical diffusion screen used for carrying out small-angle diffusion on the plurality of second light rays in the one-dimensional direction; the directional light-emitting 2D display screen, the cylindrical lens array and the optical diffusion screen are sequentially arranged in a stacked mode and used for conducting direction modulation and small-angle diffusion in the one-dimensional direction on directional light rays emitted by the directional light-emitting 2D display screen so as to reconstruct a complete discrete light field, and therefore continuous 3D images are obtained. The invention further discloses a light field 3D display method. The light field 3D displayer has the advantages of being large in visual angle, high in resolution ratio, large in depth range and the like, and mutual restriction of performance parameters of a traditional light field 3D displayer is relieved.

The invention discloses a miniature ultraviolet spectrometer, which comprises a light source assembly, a miniature collimating lens group, a triangular prism, a parallel glass plate, a cylindrical lens and an area array detector, the light output end of the light source assembly faces the incident plane of the miniature collimating lens set, and the emergent plane of the miniature collimating lens set faces the first face of the triangular prism. The emergent surface of the triangular prism is in close contact with the incident surface of the parallel glass plate; the emergent surface of the parallel glass plate faces the incident surface of the cylindrical lens, and is used for refracting light rays close to a total reflection critical angle to form a plurality of light beams; the emergent surface of the cylindrical lens faces the receiving end of the area array detector; and the area array detector processes the received interference fringes to obtain spectral information. According to the micro ultraviolet spectrograph provided by the embodiment of the invention, the light path structure of the spectrograph is simplified, the simplified structure can reduce the loss of light in the transmission process, and more light can reach the detector, so that the accuracy of spectral information is ensured.

An optical system for a vehicle headlamp is provided, and includes at least one light source, at least one collimator positioned to receive light from the light source, a cylindrical lens array (CLA) positioned to receive collimated light from at least one collimator, and an irregular freeform cylindrical lens array (IFCLA) positioned to receive light from the CLA. The IFCLA includes an entry lens with numerous entry facets of irregular sizes and an exit lens with numerous exit facets. The irregularly sized entry facets on the entry lens focus light onto the middles of the respective exit facets on the exit lens.

The invention discloses a small-pitch cylindrical lens grating type naked-eye 3D display system based on LEDs at equal intervals. The system comprises an LED display screen, a cylindrical lens grating and a diffusion screen, the size of the cylindrical lens grating is matched with that of the LED display screen, the cylindrical lens grating is arranged in parallel in front of a light-emitting surface of the LED display screen, and the cylindrical lens grating and the light-emitting surface of the LED display screen are arranged at an interval. According to the invention, the geometric similarity relationship is constructed according to the pixel pitch of the used LED module and in combination with the parameters such as the viewpoint number, the viewpoint pitch and the viewing distance, and the parameters such as the pitch and the focal length of the corresponding lens units are determined, so that the distance between the LED display screen and the cylindrical lens grating is greatly reduced compared with the distance between the LED display screen and the cylindrical lens grating in the traditional scheme. Moreover, the large-viewing-angle-range three-dimensional display effect of continuous viewing can be achieved, moire fringes can be inhibited, and the viewing comfort is improved.

The invention provides a large-viewing-angle light field 3D display. The large-viewing-angle light field 3D display is composed of a 2D display screen, a composite micro lens array and a cylindrical lens array. The 2D display screen is used for displaying a light field 3D film source; the composite micro-lens array is used for optimizing the divergence angle of light emitted by the 2D display screen, ensuring that the optimized light is distributed in a highly directional manner in a very small angle, and realizing the improvement of the resolution of a 3D image; and the cylindrical lens array is used for inhibiting the optimized light total reflection phenomenon, improving the light utilization rate, accurately reconstructing a space light field to realize dense viewpoints, and reconstructing a high-resolution 3D image in a large-angle space range. According to the large-view-angle light field 3D display, the dense light field is accurately reconstructed in a large-angle range, and the jump-free and crosstalk-free large-view-angle 3D display effect is achieved on the premise of good resolution.

The utility model discloses a lens polishing clamp, and relates to the field of optical machining. Through the unique design of the outer clamping jaw and the inner clamping jaw, the circular clamping groove and the rectangular clamping groove are adopted, cylindrical and rectangular cylindrical lenses can be stably clamped, the limitation that a traditional clamp is only suitable for clamping cylindrical lenses is overcome, the application range of the clamp is widened, the polishing requirements of lenses of different shapes in optical machining are met, and the polishing efficiency is improved. Through the ingenious design of a connecting mechanism, the inner clamping jaw can be easily disassembled by pressing a pressing rod, only a butt joint rod needs to be inserted during installation, positioning and locking are automatically completed through a limiting block and a spring, operation is easy and convenient, the replacement time of the clamp is greatly shortened, and the production efficiency is improved; and the labor intensity of operators is reduced.

The invention relates to the technical field of three-dimensional display, and discloses a three-dimensional display visual angle adjusting method, device and equipment, a medium and a program product, the method acts on a liquid cylindrical lens, and comprises the following steps: determining a current applied signal according to an expected visual angle range, so as to generate a driving force based on the current applied signal, enabling the liquid cylindrical lens to deform based on the driving force so as to change the curvature radius; and after the curvature radius of the liquid cylindrical lens is changed, the light beam emitted by the display is controlled to penetrate through the liquid cylindrical lens and is refracted, so that the actual visual angle range of three-dimensional display reaches the expected visual angle range. The curvature radius of the liquid cylindrical lens is changed by applying a signal, and light beams emitted by a display can be refracted at different transmission angles, so that the optimal viewing angle range of an observer is enlarged, the flexibility of a three-dimensional display viewing angle is improved, and the viewing experience is improved.

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 utility model relates to the technical field of lenses, in particular to a spherical lens and cylindrical lens double-control fusion lens, which comprises a lens body and is characterized in that the lens body comprises a base layer I, and an anti-reflection layer, an ultraviolet-proof layer, an impact-resistant layer, a photochromic layer and a stain-resistant layer are arranged on the surface of the lens body. An anti-reflection layer is fixedly adhered to one side of the base layer I through a resin adhesive, and an ultraviolet-proof layer is adhered to the other side of the anti-reflection layer through the resin adhesive. According to the scheme, the functionality is remarkably improved through the multi-layer composite structure design (the anti-reflection layer, the ultraviolet-proof layer, the anti-impact layer and the like), in addition, the micro lenses of the first base layer and the second base layer are distributed in a staggered mode by rotating by 30 degrees, the one-person two-mirror alternate wearing mechanism (alternating every 2-4 weeks) is combined, fatigue of retina cells caused by fixed stimulation is avoided through dynamic out-of-focus stimulation, and the anti-fatigue performance of the retina cells is improved. Meanwhile, alternate recovery is promoted, so that myopia development is intervened more scientifically.

Examples are disclosed that relate to a head mounted device (HMD) capable of providing adjustable vision correction. In one example, an HMD includes: an image source configured to generate image light; display optics configured to receive the image light and direct the image light toward an eye of a user; and a vision correction module positioned between the display optics and the eyes of the user. The vision correction module is configured to receive the image light output from the display optics. The vision correction module includes a first cylindrical lens, a second cylindrical lens aligned with the first cylindrical lens along a propagation axis, and an adjustment mechanism. The adjustment mechanism is configured to change a rotational orientation of the first cylindrical lens about the propagation axis relative to the second cylindrical lens to direct the image light to a specified location in the user's eye.

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 invention discloses a laser cleaning device for an online perforated drum wheel, which comprises a switchable reflecting mirror mechanism arranged on an output light path of a laser device; the cleaning focus lens is a cylindrical lens and is used for converting an incident light beam into a linear light beam, and the extending direction of the linear light beam is parallel to the space of the central axis of the rotary drum-shaped wheel; the switchable reflecting mirror mechanism comprises a reflecting mirror driven by a first driver; in the first state, the reflector outputs a light path corresponding to the perforated focusing mirror to form a first light path; in the second state, the reflector output light path corresponds to the cleaning focus lens to form a second light path. Laser of original equipment is used for online drum wheel cleaning, so that the maintenance time of personnel can be reduced, the working efficiency of the equipment is improved, and the equipment investment is also reduced; after laser automatic cleaning is adopted, only 2-3 minutes are needed for cleaning the drum wheel once, the drum wheel does not need to be detached from equipment, and the cleaning efficiency is improved by nearly 20 times.

The application discloses a two-dimensional refocusing laser differential interferometer and a measuring method thereof, and belongs to the field of flow field measurement. The two-dimensional refocusing laser differential interferometer comprises an optical signal emitting unit, a cylindrical lens, a first polarizer, a first light splitting prism, a first cylindrical convex lens, a second cylindrical convex lens, a second light splitting prism, a second polarizer, a photoelectric detector, a first spherical lens, a second spherical lens, a first spherical convex lens and a second spherical convex lens. The optical signal of the optical signal emitting unit sequentially passes through the first spherical lens, the second spherical lens, the cylindrical lens, the first polarizer, the first light splitting prism, the first cylindrical convex lens, the first spherical convex lens, the second spherical convex lens, the second cylindrical convex lens, the second light splitting prism and the second polarizer, and then reaches the photoelectric detector. The application solves the problems that the spatial resolution is reduced when a two-dimensional focusing laser differential interferometer measures the density pulsation of a near-wall region of a spanwise stretching model, and the non-measurement region has a great extra influence on the measurement region.

The present invention relates to the technical field of perovskite crystal surface treatment, and particularly to a spatial selective passivation device and method for perovskite polycrystalline thin films. The device includes a laser, a beam adjustment unit, and a three-dimensional moving platform; the beam adjustment unit includes a first aperture diaphragm, an attenuator, a second aperture diaphragm, a chopper, and a cylindrical lens arranged coaxially in sequence; the first and second aperture diaphragms are arranged in the output direction of the laser; the chopper is used to modulate the laser waveform to form a periodically distributed light field; the laser emits a laser beam, which enters the first aperture diaphragm for collimation, and then the laser power is controlled by the attenuator. After being collimated by the second aperture diaphragm, the waveform is modulated by the chopper, and then focused on the perovskite polycrystalline thin film sample through the cylindrical lens to achieve surface passivation. The advantages are as follows: the chopper regulates the laser waveform, generates the laser pulse beat frequency effect, produces a periodically distributed light field on the thin film surface, and realizes the passivation of two typical deep and shallow energy level defects in perovskite.