330 results about "Cylindrical lens" patented technology

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 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 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.

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.

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 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 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.

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 application discloses a high-resolution oblique-axis optical lens, comprising, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a protective glass and an image sensor; the first lens is a filter; the second lens is a biconvex spherical lens with positive focal power; the third lens is a spherical lens with negative focal power; the fourth lens is a spherical lens with positive focal power; and the fifth lens is a biconcave spherical lens with negative focal power. The technical scheme balances and corrects optical aberrations of all levels by reasonably distributing the focal power of the lenses, reasonably matching the optical materials and shapes, and utilizes the cylindrical lens to correct astigmatism caused by the optical path of the meridian arc vector plane of the protective glass, so that the advantages of large target surface, low distortion, ultra-short object distance, high resolving power and the like of the lens are achieved.

The invention discloses a parameter measurement method and device, a storage medium and electronic equipment, and the method comprises the steps: generating a test image for a test cylinder inclination angle of a cylinder grating based on the test cylinder inclination angle of the current round in a measurement process, displaying the test image based on a display mode corresponding to the inclination angle, obtaining a shot image, and displaying the shot image. Determining a first numerical relationship between the test cylindrical lens parameter and the target cylindrical lens parameter by adopting the display state of the light-emitting stripes in the inclination angle shooting image, if the first numerical relationship indicates that the test cylindrical lens inclination angle is the same as the target cylindrical lens inclination angle, finishing parameter setting of the inclination angle, and if not, finishing parameter setting of the target cylindrical lens. If yes, the test cylinder lens inclination angle is adjusted on the basis of the first numerical value relation, the adjusted test cylinder lens inclination angle is obtained, and the adjusted test cylinder lens inclination angle serves as the test cylinder lens inclination angle of the next round, and by means of the specification, the parameter types are automatically measured and adjusted, and the accuracy and efficiency of cylinder lens parameter measurement are improved.

An edge-lit waveguide illumination system with a thin, flexible layer of optically transmissive material designed for guiding light through optical transmission and total internal reflection. The system features a randomized two-dimensional pattern of discrete cavities formed on its back surface, and an array of linear cylindrical lenses on its front surface. Light is emitted by a plurality of LEDs positioned along a light input edge. A sheet of reflective material is positioned coextensively on the back surface. At least one cavity features a curved wall with a specific angle. Additional components may include a photoresponsive layer, a heat-dissipating metallic substrate with side-emitting LEDs, and optical adhesives or encapsulants. The system may also incorporate luminescent centers and / or a light-diffusing layer for altering light characteristics.

The invention discloses a particle directional and fixed-point transport system and method based on asymmetric astigmatism light field regulation and control, and belongs to the technical field of optical micro-control. The system comprises a laser, a cylindrical lens, a first plano-convex lens, a second plano-convex lens, a first reflector, a second reflector and a microscope objective. The cylindrical lens is controlled in an off-axis mode to enable a light beam to be incident vertically in an off-axis mode, and light intensity deviation perpendicular to the optical tweezer line direction is formed on the focal plane of the cylindrical lens. And converting the offset into light intensity gradient distribution along the optical tweezers line direction by using a reflector group, and generating the asymmetric linear optical tweezers after focusing by a microscope objective. The light field generates a directional net scattering force to drive the particles to move unidirectionally along the optical tweezers line direction while maintaining stable capture of the particles. Active modulation devices such as an acousto-optic deflector and a spatial light modulator are not needed, particle directional transportation can be achieved only through cooperative regulation and control of optical elements, and the device has the advantages of being simple in structure, low in cost and high in light field stability and is suitable for biomedical microoperation and particle control in a micro-fluidic chip.

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.

The chamfering device comprises a conical grinding wheel, a clamping mechanism and a grinding wheel inclining mechanism, the grinding wheel inclining mechanism is used for clamping the grinding wheel and adjusting the inclined cutting angle of the grinding wheel towards the cylindrical lens, the clamping mechanism is used for clamping the cylindrical lens through the end, and meanwhile through the structural design of a guide base, a spring and the like, the cylindrical lens is clamped through the clamping mechanism. During chamfering, the end can abut against the side face of the grinding wheel; when the to-be-chamfered face is a concave face, the arc-shaped edge of the concave face abuts against the side face of the grinding wheel, the arc-shaped edge is ground at a time through rotation of the grinding wheel, and chamfering is achieved. When the to-be-chamfered face is a convex face or a plane, the arc-shaped edge of the convex face or the straight edge of the plane makes point contact with the side face of the grinding wheel and abuts against the side face of the grinding wheel through the spring, the cylindrical mirror translates from one end to the other end at a constant speed relative to the grinding wheel in the linear direction of the to-be-chamfered edge, and the chamfered edge is continuously ground through the rotation of the grinding wheel and the translation compound motion of the cylindrical mirror. And chamfering is achieved. Through the synergistic effect of the grinding wheel and the clamping mechanism, the precision of the chamfering width and angle of various curved surfaces is achieved, and the problem that the chamfering width and angle are not uniform due to an existing spherical mold is solved.

The invention provides a linear scanning microscopic Raman spectrum imaging method and system, electronic equipment and a storage medium. The method comprises the following steps: obtaining Raman spectrums of the same sample in different directions; spectral feature maps are extracted from the Raman spectrums in different directions respectively; processing the spectral feature map to obtain reinforced features corresponding to different directions so as to make up that the spectral acquisition resolution in the line length direction is lower than the spectral acquisition resolution in the line width direction; and fusing the enhanced features to obtain a fused spectral feature map for qualitative or quantitative analysis. According to the invention, the uniformity of linear exciting light is improved by using a micro-cylindrical lens array or a DOE element, and an omnidirectional high-resolution spectral image in a sample plane is obtained by combining orthogonal double-frame sampling with an atlas fusion algorithm. The device is simple in structure and low in cost, linear exciting light energy spatial distribution uniformity and in-plane omnidirectional horizontal spatial resolution are improved, and a powerful tool is provided for rapid research of cell space metabolome.

The invention relates to a method and a laser machining system for influencing an astigmatism in a laser beam (21), wherein the laser beam (21) is guided through a first cylindrical lens (23) and then through a second cylindrical lens (24), and the mutual spacing (d) between the two cylindrical lenses (23, 24) in the propagation direction (z) of the laser beam (21) and / or different angles of rotation of the longitudinal axes of the two cylindrical lenses (23, 24) about an axis of rotation (26) in the propagation direction (z) of the laser beam (21) have been set in such a way that an astigmatism present in the laser beam (21) is at least partially compensated for or a desired astigmatism is generated in the laser beam (21).

The invention provides an inclined plane four-beam lattice light sheet super-resolution microscopic imaging device and method based on spatial spectrum estimation. The device is composed of an input light beam, a cylindrical lens group, an SLM, a reflector, a lambda / 4 wave plate, a PBS, a mask, a relay lens group, a galvanometer, an objective lens, a camera and other optical elements. By utilizing four-beam interference formed by the SLM and a high-reflectivity mirror surface on the opposite side of a sample, a lattice light sheet illumination field is realized, and fluorescence excitation is finely regulated and controlled; the same objective lens with a high numerical aperture and a three-stage infinite correction microscopic system are utilized to realize fluorescence excitation and collection, the loading space limitation of a traditional light sheet microscope is broken through, and distortion caused by high axial magnification and aberration is avoided; in combination with a spatial spectrum estimation algorithm, a measurement matrix is constructed for a low-resolution image sequence, eigenvalue decomposition is carried out, an optimal signal-to-noise ratio threshold is adaptively determined, signal and noise subspaces are divided according to the threshold, spectrum peak search is carried out by using subspace orthogonality, and thus isotropic resolution improvement is realized.

The utility model discloses an automobile column A blind area mirror which is a semi-plano-concave cylindrical lens and is arranged on the inner side, close to the bottom of a left column A, of a front windshield, and light reflected by an obstacle in a column A blind area on the left side of an automobile is refracted into the view range of a driver through the semi-plano-concave cylindrical lens. Imaging of the semi-plano-concave cylindrical lens is reduced transversely and unchanged longitudinally, so that a driver can notice obstacles more easily; the semi-plano-concave cylindrical lens is made of a flexible material or epoxy resin, so that the cost is low, and clear imaging can be realized; after the angle of the semi-plano-concave cylindrical lens is determined through calculation, the semi-plano-concave cylindrical lens is embedded or attached to the position, close to the bottom of the column A on the left side, of the inner side of a front windshield, corrosion resistance and pollution resistance are enhanced, and obstacles in the blind area of the column A are more concentrated; by calculating the angle of the semi-plano-concave cylindrical lens structure, an obstacle shielded by the A column is accurately refracted into the view of a driver, and accidents of the driver are avoided.