29 results about "Confocal" patented technology

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.

This invention provides an electrically controlled microsphere-enhanced liquid crystal layer, a differential confocal microscopy imaging method and system. The electrically controlled microsphere-enhanced liquid crystal layer includes an electrically controlled liquid crystal layer and a microsphere array disposed on the electrically controlled liquid crystal layer. The method includes the following steps: converting a single-wavelength parallel beam into circularly polarized light, focusing it through an objective lens and an objective lens driver, and scanning the sample through the electrically controlled microsphere-enhanced liquid crystal layer; applying a voltage to the electrically controlled microsphere-enhanced liquid crystal layer; collecting the reflected or scattered return beam from the sample, splitting it into two probe beam paths, and generating corresponding first and second images; calculating the image quality evaluation value of the two-dimensional lateral image based on this, and using this as a feedback signal to apply a voltage to the electrically controlled microsphere-enhanced liquid crystal layer. This invention introduces an electrically controlled microsphere-enhanced liquid crystal layer into the imaging path of a confocal microscope, achieving a significant enhancement in lateral resolution. By controlling the liquid crystal with an applied voltage, the equivalent refractive index can be dynamically adjusted.

The present application relates to the technical field of confocal adjustment, and particularly relates to a large-aperture segmented telescope discretization confocal testing and adjustment method, which comprises the following steps: S1: placing a microlens array on the focal plane of the segmented telescope to rearrange the spatial frequency of the focal point of the segmented telescope; S2: performing differential operation on the light intensity of each light spot and the light intensity of the central sub-aperture to obtain the distance from each light spot to the central sub-aperture; S3: performing testing in each direction by using an eight-neighborhood algorithm according to the distance from each light spot to the central sub-aperture to determine the adjustment step and direction of the segmented telescope; and S4: adjusting the spliced sub-mirror of the segmented telescope according to the adjustment step and direction to maximize the energy of the central sub-aperture. The microlens array is used to rearrange the spatial frequency of the focal point, and higher-precision confocal testing and adjustment are finally achieved.

The invention discloses a line spectrum confocal contour measurement sensor based on diffuse reflection signal spectral imaging demodulation, and relates to the technical field of photoelectric precision measurement sensors. The device comprises a dispersion focusing illumination light path and a confocal spectral imaging detection light path. Different from a reflection symmetrical layout of a double-axis structure, a detection light path deviates from a mirror reflection direction and is perpendicular to a detected surface, confocal diffuse reflection information is received, and spectral imaging demodulation is carried out to obtain a contour. According to the scheme, while the vertical resolution equivalent to that of a double-axis spectrum confocal structure is kept, the dependence on a strong reflection signal is eliminated, so that the device can adapt to a complex high-dynamic surface with a wide-range reflection characteristic except for a high-reflection material, and meanwhile, a measurement inclination angle larger than that of a single-axis structure and a traditional double-axis structure is realized. Due to the fact that diffuse reflection signals are relatively weak, the inverse slit device is adopted, the signal intensity of the system is improved by optimizing the structure, and therefore the imaging quality and the signal collecting efficiency of the system are improved.

The invention discloses a confocal optical path system and method for suppressing stray light, and belongs to the technical field of optical precision measurement. According to the invention, the beam expander is moved forwards by 2-5 mm relative to the flat beam splitter prism, so that the light beam incident to the core beam splitter is actively converted into the Gaussian beam with the specific divergence angle from the parallel light, and is coupled with the symmetrically arranged confocal light paths, thereby solving the problem that in the existing heterodyne laser vibration measurement technology, the parallel light generates multi-path reflection on the surface of a planar optical element, so that the measurement precision is greatly improved. In the prior art, a stable parasitic interference cavity is formed, high-order and dynamic nonlinear errors and phase drift are introduced, and the technical problems of system complexity, high cost and difficult installation and adjustment caused by traditional suppression means (such as off-axis design and an ultrahigh antireflection film) are solved, the spatial coherence of stray light and main signal light is destroyed, the stray light intensity in the system is suppressed by about two orders of magnitude, and the system stability is improved. The non-linear distortion of a measurement signal is significantly reduced, and the adjustment tolerance and long-term stability of an optical path are improved at the same time.

A method of image enhancement of a reflectance confocal microscope is disclosed. The method comprises: receiving by a processor a first image captured by a detector of the confocal microscope, at a first position of a pinhole; receiving one or more second images captured by the detector, at at least one second position of the pinhole; and adding, by the processor, the one or more second images to the first image to reduce a speckle contrast in the combined image. In addition, the first position of the pinhole is a confocal position, and the at least one second position is a shifted position with respect to the confocal position.

The line spectrum confocal measuring head comprises a slit and a lens barrel, the slit is arranged at one end of the lens barrel and is used for introducing a complex-color line light source with a fixed bandwidth into the lens barrel, a dispersion lens group is distributed in the lens barrel and along an emission light path of the slit, so that the complex-color light is separated and focused through the dispersion lens group; and the light with different wavelengths is focused at different positions in the optical axis direction and is sequentially distributed along with increasing of the wavelengths, so that a measured object is placed in a measuring head dispersion area, and the current position of the measured object relative to the dispersion lens group is obtained according to peak information of a reflected light spectrum on the surface of the measured object. The linear light source of the measuring head can realize linear field-of-view detection and obtain field-of-view position information on the axis and outside the axis of a measured object at the same time, the transverse measurement efficiency is improved while the longitudinal measurement range is ensured, the longitudinal measurement range can reach + / -3.6 mm, and the transverse measurement range can reach + / -8.5 mm.

The present application provides a kind of spectral confocal sensor in-machine space pose calibration compensation method, this method includes: according to the target plane of spectral confocal sensor is moved ranging, determine the pitch angle offset of spectral confocal sensor;According to the confocal data of the optical axis of spectral confocal sensor and the C-axis of three-axis horizontal centering vehicle when centring, determine the eccentric offset of spectral confocal sensor and the geometric relationship between probe coordinate system, reference coordinate system, workpiece coordinate system;When spectral confocal sensor is scanned and measured to the measured surface of the measured workpiece, the measuring point coordinates of spectral confocal sensor in probe coordinate system are converted into target coordinates in workpiece coordinate system, on the premise of guaranteeing measurement accuracy, system structure and calibration process are greatly simplified, improve the implementability, stability and measurement consistency in machine environment.

A time resolved reflectance metrology device may detect and image structures in a layer that underlies an at least partially transparent top layer. A pulsed laser beam (pump beam) is used to irradiate the sample to produce transient signals in the underlying layer. The transient signals are detected using a probe beam that reflects from the interface between the top layer and the underlying layer. Light from the probe beam that is reflected from the top surface of the top layer may be eliminated using a confocal lens arrangement before the detector. The confocal lens arrangement, for example, includes a pinhole that is positioned at the image plane for the interface between the top layer and the underlying layer. The structures may be detected and imaged based on the transient signals.

The application discloses a large-aperture optical system and a camera module, the large-aperture optical system comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens arranged in sequence along an optical axis from an object plane to an image plane, wherein each lens satisfies the following conditions: -15.0mm < f1 < -8.0mm; -16.0mm < f2 < -9.0mm; 20.0mm < f3 < 35.0mm; 14.0mm < f4 < 22.0mm; 6.0mm < f5 < 13.0mm; -8.0mm < f6 < -3.0mm; 4.0mm < f7 < 9.0mm; -15.0mm < f8 < -8.0mm; 10.0mm < f9 < 19.0mm. The large-aperture optical system is configured by nine lenses, the number of lenses is reasonable, the structure is compact, the surface shape and the optical power of each lens are reasonably distributed, the lens aberration is optimized, the imaging quality of the optical system is improved, the large-aperture optical system has excellent resolving power, high pixels, a large aperture, day and night focus and other excellent characteristics, and has great potential in the IPC market.

A spinning disk confocal microscopy system, and components thereof, with improved illumination. The system may include (1) a light engine, (2) confocal optics, such as Yokogawa spinning disk confocal optics, (3) a detector, and (4) a free-space optics linkage. The light engine may include at least one light source configured to produce fluorescence excitation light. The confocal optics may direct the fluorescence excitation light from the light engine onto a fluorescent sample and collect fluorescence emission light emitted by the sample. The detector may capture fluorescence emission light from the sample to form an image of the sample. The free-space optics linkage may direct fluorescence excitation light from the light engine to the confocal optics, at least in part through free space.

A handheld or portable confocal microscope objective includes: a housing; an infinite conjugate objective assembly disposed within the housing; a protective window connected to the end of the housing and having a contact surface and a protective window compression surface oppositely disposed therebetween, the contact surface being for contacting the sample to be tested, and the protective window compression surface being located between the contact surface and the compression surface of the objective assembly at one end of the infinite conjugate objective assembly; an optical coupling agent filling the space between the infinite conjugate objective assembly and the protective window, and being tightly abutting the compression surfaces of the objective assembly and the protective window, the optical coupling agent having a fixed refractive index; and an objective drive module connected to the infinite conjugate objective assembly, the objective drive module driving the infinite conjugate objective assembly to move, thereby adjusting the degree of compression of the optical coupling agent. The handheld or portable confocal microscope objective of this invention enables deep, high-resolution, non-invasive three-dimensional tomographic imaging.

This invention discloses a super-resolution microscopic imaging method based on multi-channel modulation and demodulation. First, this invention utilizes the synergistic effect of a spatial light modulator and an electro-optic deflector to generate multiple hollow illumination spot arrays. Second, during the scanning of the target sample, fluorescence signals are acquired for the illumination area of ​​each hollow illumination spot, corresponding one-to-one with the multi-channel hollow illumination spot array according to the sampling time sequence. Then, pixel-level signal redistribution processing is performed on the acquired multi-channel images. The redistributed image stack is divided into at least three regions, and corresponding weighting coefficients are applied to the signals of different regions for linear or nonlinear combination. Finally, an inverse Fourier transform is performed on the weighted combined image to obtain the super-resolution image. This invention can extend the support domain of the optical transfer function, achieving a resolution superior to traditional confocal and single-point hollow excitation and detection methods.

A module (500) for a spectrometer including a first shield (3100A) and a second shield (3100B). The first shield includes a first slit (3102, 3104, 3106, 3108), and the second shield includes a second slit (3102, 3104, 3106, 3108). The first and second shields are movable relative to each other to create a reconfigurable confocal aperture by the first and second slits, wherein the first and second slits are elongated in different directions. A method for collecting spectral data is also disclosed, comprising providing a confocal aperture through the first and second shields by partially aligning the slits in the first and second shields, wherein the slits in the first and second shields are elongated in different directions.

The application discloses a fixed focus lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens arranged in sequence along an optical axis from an object side to an image side, the fourth lens and the fifth lens form a first cemented lens group, the sixth lens and the seventh lens form a second cemented lens group, the first lens has a negative focal power, the second lens has a negative focal power, the first cemented lens group has a positive focal power, the second cemented lens group has a positive focal power, the seventh lens has a positive focal power, the eighth lens has a negative focal power, and the ninth lens has a positive focal power. The fixed focus lens provided by the application has a reasonable setting of the cemented state, the surface shape and the focal power of the lens, realizes the characteristics of an aperture number F.NO less than or equal to 1.05, infrared confocal and compact structure, can clearly image under weak light, and meets the day and night sharing demand.

The invention relates to a confocal Raman microspectrometry device (100) comprising a laser source (1), a microscope objective (3) arranged to focus an excitation laser beam (10) towards a sample (5) and a focusing system for focusing the sample. According to the invention, the focusing system comprises an optical beam splitter (11) adapted to extract a portion (21) of the reflected beam, an image detector (13), an astigmatic optical system (12), a processor comprising an image processing system (15) and a feedback device (16), the astigmatic optical system (12) being adapted to project the portion (21) of the reflected beam as a spot on the image detector (13), the image processing system (15) being adapted to calculate a focusing error signal from the image of the spot.

Method for preparing a material processing device (10) for material processing by creating optical openings in or on an object, which has a variable, three-dimensionally acting focus adjustment device (18) for focusing processing laser radiation on different locations in or on the object, - wherein a contact element (20) which is transparent to the processing laser radiation and which is to be placed on the object is attached to the material processing device (10), and which has a contact surface (22) on its side to be placed on the object and an entry surface (24) for the processing laser radiation on its side facing the material processing device (10), - wherein, prior to processing the object, a shape of the contact surface (22) and / or entry surface (24) is determined by means of irradiating the contact surface (22) and / or entry surface (24) with measuring laser radiation (14), by ◯ the measuring laser radiation (14) is focused near or onto the contact surface (22) and / or entrance surface (24) by means of the variable focus adjustment device (18), wherein the energy density of the focused measuring laser radiation (14) is too low to generate an optical breakthrough, ◯ Radiation backscattered or backreflected from the focus of the measuring laser radiation (14) is detected confocally, ◯ from the confocally detected radiation and the associated setting of the variable focus adjustment device (18) a position of intersection points on the contact surface (22) and / or entrance surface (24) is determined, and ◯ a three-dimensional surface model is adapted to the determined location of the intersection points, whereby the surface model provides the 3-dimensional shape of the contact surface (22) and / or entry surface (24).

The invention provides a multi-modal eye fundus image classification method and device and a computer readable medium, and the method comprises the steps: carrying out the class prediction based on a to-be-detected eye fundus image, and outputting a first image classification result; if the first image classification result represents that the eye fundus image to be detected is a color eye fundus image, detecting whether the color eye fundus image is a confocal laser eye fundus image to obtain a first detection result; if the first detection result represents that the color eye fundus image is not the confocal laser eye fundus image, detecting whether the color eye fundus image is a wide-angle eye fundus image, and obtaining a second detection result; and if the second detection result represents that the color eye fundus image is not the wide-angle eye fundus image, determining a camera type corresponding to the color eye fundus image based on a signal-to-noise ratio and a definition distribution diagram corresponding to the color eye fundus image, and outputting a second image classification result corresponding to the camera type. According to the embodiment, the color eye fundus images can be classified based on the camera type, so that a scientific basis is provided for subsequent image analysis and image quality evaluation.

This invention discloses a large-aperture day-night confocal optical system and a camera module. The large-aperture day-night confocal optical system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially along the optical axis from the object plane to the image plane. Each lens in this optical system satisfies the following conditions: 12 < f1 < 15; -8.3 < f2 < -6.5; 3.6 < f3 < 6; -14 < f4 < -12.3; 5 < f5 < 13; -17 < f6 < -15. This invention configures the large-aperture day-night confocal optical system with six lenses, resulting in a reasonable number of lenses, a simple structure, and optimized lens aberrations through reasonable allocation of the optical power of each lens, thereby improving the imaging quality of the optical system. This day-night confocal optical system and camera module possess excellent characteristics such as high resolution, high pixel count, large aperture, and day-night confocal focus, demonstrating significant potential in the IPC market.

The application provides a small-sized day-and-night confocal super-wide-angle lens, which is composed of a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens, a sixth lens and a plane mirror arranged in sequence from an object side to an image side along an optical axis direction, and satisfies the following relationship: f1'<0, f2'<0, f3'>0, f4'>0, f5'<0, f6'>0; -2

The application discloses a starlight-level high-definition optical lens and belongs to the technical field of optical lenses. The optical lens comprises a first lens, a diaphragm, a second lens, a third lens, a fourth lens and a photosensitive chip which are sequentially arranged along an optical axis from an object plane to an image plane. The first lens, the third lens and the fourth lens are plastic aspheric lenses, and the second lens is a glass spherical lens. The focal lengths of the first lens, the second lens, the third lens and the fourth lens are negative, positive, positive and negative in sequence. The optical lens has an FNo. of 1.6, a resolution of 80% of 4 million pixels or more, and the night vision is confocal and the purple light halo is weakened. Moreover, the optical lens has a low cost.

The application discloses a kind of based on micro double parabolic array's suspended imaging film and its preparation and imaging method, it is related to naked-eye three-dimensional display and ultrathin optical film technical field, the film includes upper layer and lower layer micro reflection array base, both composite and meet strict confocal geometric relation: the focal point of upper layer concave mirror unit is located in the vertex surface of lower layer corresponding unit, the focal point of lower layer unit is located in the vertex light hole center of upper layer unit.The vertex surface of lower layer unit is equipped with micro image source layer.The application realizes true three-dimensional suspended display under ultrathin form, with compact structure, imaging realistic, no dispersion, strong anti-counterfeiting and the like advantages.

The application discloses a day and night confocal optical system and a camera module. The day and night confocal optical system comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged along an optical axis from an object plane to an image plane. The lenses of the optical system satisfy the following conditions: -15 < f1 < -8; -7.5 < f2 < -3.6; -9.3 < f3 < 11; -11.5 < f4 < 4.3; 1 < f5 < 5; -3.5 < f6 < 3.3; -5.6 < f7 < 4.9. The day and night confocal optical system is configured by seven lenses, the number of lenses is reasonable, the structure is simple, the optical power of each lens is reasonably distributed, the lens aberration is optimized, the imaging quality of the optical system is improved, the day and night confocal optical system and the camera module have excellent resolving power, high pixels, a large aperture, day and night confocal and other excellent characteristics, and have great potential in the IPC market.

The invention relates to the technical field of wafer processing, and discloses a coaxial automatic focusing method, which comprises the following steps: forming a damage point on the surface of a wafer by using a laser focus; the focusing F axis is moved upwards in the Z direction, a target adjusting module is adjusted, observation is performed through a coaxial charge-coupled device until the target is imaged clearly, and the difference value between the coordinate of the focusing F axis and the coordinate of the focusing F axis of a damage point formed by focusing of a laser focus on the surface of the wafer when the cross-shaped target forms a clear image in air above the surface of the wafer is recorded; in the wafer machining process, the focusing F axis is driven to move in the Z direction, image matching is carried out through the coaxial charge-coupled device so as to identify the coordinate position f2'of the focusing F axis of clear imaging of the target, and an actual wafer machining point is obtained based on interpolation. According to the invention, switching between confocal and non-confocal of the laser focus and the cross-shaped target focus can be realized, and the problem that the brightness of the front electrode of the ultrathin wafer interferes with automatic focusing pattern recognition in a visual confocal scheme can be solved.

An imaging component configured to be implemented in an imaging device includes a pinhole disk configured to rotate and / or to move laterally within the imaging device; and pinhole apertures in the pinhole disk. Additionally, the pinhole apertures are arranged in the pinhole disk in a pattern arrangement consistent with at least one geometric spiral; and the at least one geometric spiral pattern arrangement of the pinhole apertures comprises a non-Archimedean spiral.

The invention relates to a large-aperture segmented mirror reference establishment method based on wavefront segmentation. The method comprises the following steps: correcting the position of the sight glass; segmenting a telescope area; light intensity uniform distribution is taken as a target, and the position and the surface type of a sub-mirror are corrected: a micro-lens array constructed by adopting a geometric phase material is utilized to redecompose a light spot, boundary variation is identified through aperture light intensity difference, and the global center position of the whole wavefront is obtained by counting the light intensity centroid of discrete sub-apertures; unifying an optical reference and a mechanical reference; for a sub-mirror on a single ring belt, the confocal state and the curvature consistency are sensed and adjusted at the same time by utilizing curvature sensing; for the central sub-mirror, obtaining the perception of the curvature radius and the aberration; simulating a wavefront difference corresponding to the curvature radius difference; spherical-aberration-free annular belt splicing is achieved based on a multi-dimensional adjusting frame; and for multi-girdle splicing, the overall curvature radius of the girdle is adjusted according to the high-order spherical aberration. According to the method, the mirror surface adjustment accuracy is improved.

The invention discloses a suspension imaging thin film based on a micro double-paraboloid array and a preparation and imaging method of the suspension imaging thin film, and relates to the technical field of naked eye three-dimensional display and ultrathin optical thin films. The focus of the upper-layer concave reflecting mirror unit is located on the vertex surface of the lower-layer corresponding unit, and the focus of the lower-layer unit is located in the center of a vertex light hole of the upper-layer unit. A micro image source layer is arranged on the surface of the vertex of the lower layer unit. According to the invention, true three-dimensional suspension display in an ultrathin form is realized, and the device has the advantages of compact structure, vivid imaging, no dispersion, strong anti-counterfeiting property and the like.

The application discloses a time-domain spectrum system capable of generating and detecting ultra-wideband terahertz pulses. The system comprises a laser light source, a light splitting module, an optical path adjustment coupling module, a terahertz emission module, a sample detection module and an electro-optic sampling module. After the laser pulses output by the laser light source are split, the pump light is chopped, modulated, expanded and irradiated to a spin terahertz emitter to generate ultra-wideband terahertz pulses of 0.1-10 THz. After the terahertz pulses interact with the sample through a confocal off-axis parabolic mirror, the terahertz pulses are collimated and output again. The detection light formed by light splitting is adjusted in optical path and coincides with the terahertz pulses in time and space, and is focused on an ultra-thin ZnTe crystal in the <110> crystal direction. Finally, the terahertz time-domain signal is obtained through electro-optic sampling. The system has the functions of emitting and detecting ultra-wideband terahertz pulses, and can be used not only in the fields of material detection and physicochemical analysis, but also in the precise verification of the characteristics of other terahertz sources and detection crystals.

The invention belongs to the field of spectrum testing, and particularly relates to a channel spectrum testing system and method based on a point detector, and the method comprises the steps: S1, enabling a light source to emit composite light to a splicing primary mirror; s2, the compound light is reflected by each sub-mirror of the spliced primary mirror and then enters an interferometer for interference to form interference light; s3, interference light is subjected to dispersion of a dispersion prism and compression shaping of a cylindrical lens in sequence to form linear light spots, and the linear light spots are received by a point detector array; and S4, performing fitting and phase calculation on the dispersion interference fringes to realize confocal adjustment of the spliced primary mirror. The method does not need to calibrate dispersion interference fringes, greatly reduces the cost and complexity of the system, and improves the reliability of the system.