161 results about "Optical aberration" patented technology

The invention discloses a turntable-based dual confocal image scanning microscope and an imaging method, and relates to the technical field of optical elements, systems, instruments and imaging. The imaging light source assembly, the optical fiber transmission assembly, the light source collimation assembly, the structured light generation assembly, the turntable assembly, the microscopic amplification assembly and the camera detection assembly are arranged along a light path; the structured light generation module realizes structured light illumination on a sample surface by loading a specific mask sequence, super-resolution imaging is realized, pinholes in the turntable assembly are equidistantly arranged according to an Archimedes spiral, and the turntable assembly rotates at a high speed to realize multi-point parallel scanning and de-scanning; the detection module performs detection by using an area array detector, so that the resolution improvement of double diffraction limit is realized; according to the dynamic pinhole array-pixel redistribution method, super-resolution reconstruction is carried out based on an image scanning microscopic system principle, and Stokes shift, optical aberration and other non-ideal conditions can be effectively corrected.

The invention relates to the technical field of head-up display, in particular to an HUD optical aberration correction method, system and device and a vehicle. The correction method comprises the following steps: generating a light beam through an LED light source or a laser light source, and adjusting the brightness and color parameters of the LED light source or the laser light source through a control circuit so as to adapt to different display requirements and environmental conditions; and the light beam is preliminarily shaped and collimated by the light beam shaping element until a proper divergence angle and a proper light spot size are met so as to meet the requirements of a coupling element. According to the invention, the light beam emitted by the light machine is subjected to one-dimensional or two-dimensional pupil expansion through the optical waveguide, and then view field expansion and aberration correction are carried out through the free-form surface mirror, so that the problems of large size, limited view field angle, small eye box range and insufficient imaging definition in the prior art are effectively solved.

A laser machining system comprises a laser generator (202) producing ultrafast laser pulses, a galvanometric scanner mirror (102, 204) for precision deflection of the laser beam (101), and a main unit (100) comprising a folded optical system with focusing optics (207, 210, 212, 214) capable of delivering the laser beam focused waist onto the surface of a elongated thin workpiece (103), for example, cylindrically-shaped, or having quadrilateral or mullitlateral or elliptic perpendicular cross-section. The main unit (100) is attached directly to the scanning mirror subsystem (102) and they both comprise the optical path, which is separated into several, e.g., four, equal paths terminating on the workpiece (103) surface from orthogonal directions covering the workpiece from opposite sides. The optical path in the main unit (100) is arranged in such a way that the paraxial optical mode remains valid at all reflecting mirrors, mitigating the optical aberrations of the focused beam onto the surface of the workpiece (103). With controlled deflection of the scanner mirror (204), the laser beam can access the full area of the outer surface of the workpiece (103) and process the workpiece (103) using controlled laser ablation or surface treatment using direct laser writing (DLW). The workpiece (103) is mounted into a translation stage perpendicularly to the laser beam, allowing free-form laser processing onto a cylindrically- or multilaterally-round elongated shape, by synchronized deflection (204) of the laser beam, and longitudinal translation of the workpiece (103) by the translation stage.

A line-of-sight detection device according to the present invention includes: a display element; an optical system configured to guide light from the display element to a user; a light source; an image sensor configured to capture light from the light source reflected by an eye of the user, through at least a part of the optical system, wherein the optical system includes a lens that has a first surface from which light from the user side is emitted to a light-receiving surface of the image sensor, and a second surface through which light from the light source enters, the lens is disposed at a position facing the image sensor and the light source, and optical aberration of the first surface is smaller than optical aberration of the second surface.

The invention relates to the technical field of optical imaging, and discloses an optical lens splicing imaging method and system, and the system comprises a calibration module, a preprocessing module, a registration module, a correction module, and a fusion module. Through the arrangement of the registration module, the correction module and the fusion module, the problem of registration errors caused by sparse feature points of a low-texture region can be solved through a mixed strategy of global mutual information guidance and local robust matching, the registration precision is effectively improved, the optical aberration of each sub-lens is compensated through a global model based on a Zernike polynomial, and the registration precision is improved. The image quality of the marginal area of the spliced image is effectively improved, a multi-resolution pyramid optimization mode is adopted, the calculation complexity of global registration is reduced, the real-time imaging requirement is met, meanwhile, splicing seams are effectively eliminated, and the overall smoothness of the image is remarkably improved.

The invention provides a slit-type spectral imaging method based on filtering phase reconstruction and a grating spectrometer. The method comprises the following steps: measuring wavefront aberration of a slit-type grating imaging spectrometer before slit filtering by using a wavefront sensor; based on a slit filtering principle, reconstructing a phase function after slit filtering by using wavefront aberration before slit filtering; and capturing a slit image, and reconstructing the slit image by using the reconstructed filtered phase function of the slit to obtain a final reconstructed image. According to the method, effective recovery of the slit imaging data of the grating spectrometer based on the slit is realized, the influence of optical aberration and image noise on the spectrum and spatial resolution of the spectrometer is effectively eliminated, and the slit imaging quality is remarkably improved and is close to the diffraction limit.

Embodiments of the present disclosure generally relate to an optical system having a lens system configured to have a wide field of view and high resolution. The optical system includes three or more lens groups with ability to combat optical aberrations and produce a pupil outside of the lens group. The lens system as an image projection system projects a pattern or image rendered on a flat reticle or display of finite distance to the infinity. In an imaging system, the lens system collects light from infinity and forms an image of that object on a sensor.

A charged particle beam microscope system directs a charged particle beam to a sample to produce a plurality of images for a plurality of areas of the sample. Respective first sets of one or more aberration predictor values are acquired for each of the plurality of images. During the image acquisition, an aberration measurement and a corresponding second set of aberration predictor values are periodically acquired. An aberration model is obtained using the aberration measurements the corresponding second sets of aberration predictor values, wherein the model takes a set of aberration predictor values as an input and outputs predicted aberration data. The model is applied to the first sets of aberration predictor values to obtain respective aberration data, which is used to reduce or at least partially correct for aberration in the charged particle microscope images. A sample reconstruction is obtained using the acquired charged particle microscope images.

The invention relates to a 1.2-inch intelligent traffic monitoring system lens and a working method thereof. An optical imaging system of the lens is sequentially provided with a first lens to a fourteenth lens from an object space to an image space. Wherein the focal power of each lens adopts a positive and negative combined form, so that optical aberrations such as spherical aberration and the like are greatly reduced. Wherein the fourth lens and the fifth lens form an achromatic doublet lens group, the seventh lens and the eighth lens form an achromatic doublet lens group, the ninth lens and the tenth lens form an achromatic doublet lens group, and the eleventh lens, the twelfth lens and the thirteenth lens form an achromatic triplet lens group. Through reasonable lens matching, an optical system realizes large aperture, large target surface and no defocus in day and night, and through good correction of on-axis and off-axis aberrations, the lens has good imaging quality.

Systems and methods for analyte detection and analysis are provided. A system may include an open substrate. The open substrate may be configured to rotate or otherwise move. The open substrate may include an array of individually addressable locations, with the analyte immobilized thereon. Substrates may be spatially indexed to identify nucleic acid molecules from one or more sources and / or sequences thereof, as well as respective one or more sources. A solution comprising a plurality of probes may be directed throughout the array to couple at least one of the plurality of probes to at least one of the analytes to form a binding probe. The detector may be configured to detect a signal from the bonding probe by scanning the substrate while minimizing temperature fluctuations of the substrate or optical aberrations caused by bubbles.

Provided are systems and methods for analyte detection and analysis. A system can comprise an open substrate. The open substrate may be configured to rotate or otherwise move. The open substrate can comprise an array of individually addressable locations, with analytes immobilized thereto. The substrate may be spatially indexed to identify nucleic acid molecules from one or more sources, and / or sequences thereof, with the respective one or more sources. A solution comprising a plurality of probes may be directed across the array to couple at least one of the plurality of probes with at least one of the analytes to form a bound probe. A detector can be configured to detect a signal from the bound probe via scanning of the substrate while minimizing temperature fluctuations of the substrate or optical aberrations caused by bubbles.

The invention relates to cylindrical tunable fluidic lenses. The cylindrical optical power of the lenses may be continuously tuned within at least ±10 diopters, without inducing any significant spherical aberration, or any other significant aberrations. The lenses feature a geometry that produces minimal or no spherical defocus. These cylindrical tunable fluidic lenses could be used to induce and / or correct cylindrical optical aberrations in adaptive optical systems, particularly in ophthalmologic applications related to objective and automatic assessment of the refractive error of the eye, without the need of receiving feedback from the subjects.

A method for acquiring an image with an apparatus including a camera module including an optical lens associated with an image sensor, the method including at least one iteration of an image acquisition phase by the apparatus including the following steps:capturing an image with the camera module; andcorrecting the captured image according to at least one correction matrix calculated, directly or indirectly, from at least one matrix, referred to as aberration matrix, determined for the optical lens, and representative of optical aberrations introduced by the optical lens in an image. Also disclosed are a characterization system and an imaging apparatus implementing such a method.

A correction optical element (COE) for a multi-channeled coherent beam combining (CBC) system that uses a fiber array comprising multiple optical fibers and a single collimation array comprising multiple collimating lenses, for coherent combining of a corresponding array of optical beams directed through the fiber array. The COE is configured for customized and segmented correction of collimation-based optical aberrations, caused at least due to misalignments between each corresponding optical fiber's Lij output end and a center of a corresponding collimating lens Lij.

Provided herein are a soft contact lens for correcting an ocular refractive error of an eye, the soft contact lens comprising a vaulted portion and a specialty feature.

A pair of eyeglasses may include one or more adjustable lenses. An adjustable lens may include a stack of liquid crystal cells with passive matrix electrode arrays. Each passive matrix electrode array may include a pair of orthogonal electrodes that are rotated relative to other pairs of orthogonal electrodes in the stack. Control circuitry may apply different voltage profiles to the passive matrix electrode arrays to create the desired lens characteristics in the adjustable lens. The voltage profiles may be based on a stored look-up table that maps different target lens characteristics to different voltage profiles for the passive matrix electrode arrays. The target lens characteristics may include at least one of a target lens power and a target optical aberration correction. The look-up table may be based on information gathered during design and manufacturing using numerical optimization techniques.

The invention provides an integrated calibration method, device and equipment for photoelectric non-uniformity of an optical star measurement sensor, and relates to the technical field of spacecraft celestial navigation. The method comprises the following steps: constructing lattice structure light to form array image spots on a star sensor, resampling to establish an actual PSF model, and realizing optical system aberration calibration of a corresponding area; sequentially displacing the array image spots, and calibrating the electrical response non-uniformity of each pixel by using the mapping relation between imaging data and PSF; and performing precise positioning on the image spot array after pixel response correction to obtain an image spot high-precision positioning result, and calibrating optical distortion of each pixel according to the high-precision positioning result. Therefore, the problems of photoelectric non-uniform coupling and limited calibration precision in calibration of the star measurement sensor are effectively solved, and high-precision and integrated calibration of optical aberration, distortion and electrical response of the star measurement sensor is realized.

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 present invention relates to an optical or Raman micro-spectrometry apparatus (100) comprising an optical microscope objective (10) and an optical spectrometer (20). According to the invention, the micro-spectrometry apparatus comprises an astigmatic optical system (30, 31, 32) arranged outside the optical spectrometer (20, 21), between the microscope objective (10) and the optical spectrometer, the astigmatic optical system (30, 31, 32) being arranged and configured to form an astigmatic image of a light beam transmitted through the microscope objective (10) on the input slit of the optical spectrometer (20, 21), the astigmatic image being elongated by astigmatism in the height direction of the input slit, the optical spectrometer being able to spectrally disperse the astigmatic image and form a spectrally dispersed image of the field of view on the detector, the astigmatic optical system being configured to reduce an optical aberration of astigmatism of the optical spectrometer in the spectrally dispersed image.

The invention relates to a method for characterizing microorganisms present in a biological sample, said method comprising acquiring a real-time holographic digital image of the sample, generating a focused image by using a digital model for reconstructing the focused image, and characterizing bacteria based on the focused image. According to the invention, a plurality of calibration objects are provided in the acquisition field of view prior to acquisition of the holographic image, these objects having pre-characterized dimensions and refractive indexes and selected shapes, such that the interference pattern of the objects can be calculated using an image forming model for integrating the optical aberrations of the acquisition device. The optical aberration is limited according to the interference pattern of the object and the calculated interference pattern before the computer generates the focused image, and a digital model used to reconstruct the focused image integrates the quantized optical aberration.

A method for heating an optical element in an optical system, such as a microlithographic projection exposure system, comprises introducing a heating power into the optical element using a thermal manipulator. The heating power is adjusted to a set of desired values. The set of desired values is adjusted to produce a thermally induced deformation depending on a first optical aberration to be compensated. Adjusting the set of desired values also includes taking into account the effect of introducing the heating power on a second optical aberration which is caused by useful light impinging on the optical element during operation of the optical system. The thermally induced deformation profile can be co-optimized.

Lens systems are described that may be used in small form factor cameras. An imaging lens system may include a front aperture and five lens elements, and provides a low F-number (<=2.4), wide field of view (>=82 degrees), and short total track length (TTL). Lens system parameters and relationships may be selected at least in part to reduce, compensate, or correct for optical aberrations and lens artifacts and effects across the field of view.

A line-of-sight detection device according to the present invention includes: a display element; an optical system configured to guide light from the display element to a user; a light source; an image sensor configured to capture light from the light source reflected by an eye of the user, through at least a part of the optical system, wherein the optical system includes a lens that has a first surface from which light from the user side is emitted to a light-receiving surface of the image sensor, and a second surface through which light from the light source enters, the lens is disposed at a position facing the image sensor and the light source, and optical aberration of the first surface is smaller than optical aberration of the second surface.

SOLUTION: A charged particle beam microscope system produces a plurality of images for a plurality of areas of a sample. Respective first sets of one or more aberration predictor values are acquired for each of the images. During the image acquisition, an aberration measurement and a corresponding second set of aberration predictor values are periodically acquired. An aberration model is obtained using the aberration measurements the corresponding second sets of aberration predictor values, where the model takes a set of aberration predictor values as input and outputs predicted aberration data. The model is applied to the first sets of aberration predictor values to obtain respective aberration data, which is used to reduce or at least partially correct aberration in the charged particle microscope images.EFFECT: A sample reconstruction is obtained using the acquired charged particle microscope images.SELECTED DRAWING: Figure 1

The present invention is applicable to the field of pilot training technology and provides a ground-based vision training device for pilots that takes environmental and physiological factors into account. The device uses a computer system to rapidly simulate human visual characteristics, including: establishing a light source and brightness detector; obtaining a two-dimensional distributed brightness matrix of the scene; obtaining ambient brightness information of the external scene as perceived by the human eye, which affects optical aberrations by affecting pupil diameter; establishing an optical model of the human eye and obtaining a modulation transfer function; simulating the observation effect of the external scene after passing through the model in the frequency domain, using a GPU for accelerated processing; using an eye tracker to determine the coordinates of the pilot's gaze point, simulating the blur and depth of field characteristics of the peripheral vision; and finally performing image fusion to obtain a simulated image of the external scene after passing through the human eye. The present invention can improve the effectiveness of flight training or the accuracy of new aircraft cockpit evaluations, and provide pilots with a more realistic and intuitive flight visual experience during ground training.

The utility model discloses a vehicle-mounted foresight camera assembly and a vehicle, the vehicle-mounted foresight camera assembly comprises a mounting shell, the mounting shell is suitable for being connected to the rear side of a front windshield, and the mounting shell forms a containing cavity opened towards the front windshield; the front-view camera is installed in the containing cavity, the front-view camera comprises an imaging part and a plurality of lens parts, the multiple lens parts and the imaging part are sequentially distributed in the front-back direction, and at least one lens part is provided with a light filtering film assembly. According to the vehicle-mounted foresight camera assembly, the foresight camera is arranged in the installation shell, the road condition in front of the vehicle can be captured, the auxiliary driving function of the vehicle-mounted foresight camera assembly can be achieved, the multiple lens parts are arranged in the foresight camera, the distribution of light can be controlled, and the vehicle-mounted foresight camera assembly is more convenient to use. The optical aberration is effectively reduced, the image quality is improved, the filter film assembly is arranged on at least one lens part, unnecessary stray light can be filtered, and the authenticity and definition of the image are improved.

A multiplexing adaptive optics method for deep-tissue imaging is provided, comprising: providing a first optical beam and a group of second optical beams, each with lower intensity and distinct modulation frequencies; combining the beams with temporal overlap to form a composite excitation beam; focusing the composite beam into a sample such that the second optical beams are laterally separated in the focal plane; detecting a signal excited by the composite beam; demodulating the signal with reference frequencies to compute phase and amplitude data at each modulation frequency and obtain a second signal; performing spatial measurements of the first beam relative to the second beams to derive down-sampled electric-field point spread functions; and merging the functions to reconstruct a full-sampled point spread function for identifying and correcting optical aberrations within the sample.

The invention discloses an optical system aberration checking method and device, and the method comprises the steps: providing a dot pattern array target plate, enabling a lens and a photosensitive chip to form an imaging system, shooting the dot pattern array target plate, collecting at least two frames of dot pattern array images shot by the imaging system, and carrying out the imaging of the dot pattern array target plate. An aberration simulation model is obtained according to shape information of dot patterns in dot pattern array images shot by at least two frames of an imageable system, the optical aberration of the imageable system is obtained according to the aberration simulation model, and the dot pattern array target plate covers a center view field area and a peripheral view field area of the imageable system. The sizes and the shapes of the dot patterns in the same view field area in the dot pattern array images shot by the two frames of imaging systems are different, and the axial distances of the photosensitive chip and the lens are different when the two frames of dot pattern array images are shot, so that excessive measurement conditions of the optical system are not depended on; the aberration of the full view field of the lens is recovered from the two recorded frames of defocus intensity images through the aberration simulation model, and a defocus curve is generated.

The invention provides a multi-site adaptive optical correction method and device applied to a mesoscopic two-photon scanning microscope, and the method comprises the steps: employing a resonance mirror and two galvanometers as a scanning module of a system, dividing a whole imaging view into a plurality of sub-regions, and carrying out the sequential scanning of the sub-regions one by one; a reflective deformable mirror is used as an aberration compensator, and an aberration compensation value is updated in real time; the whole visual field is filled with a regular hexagon, the center and vertex positions of the regular hexagon are set as aberration compensation points, and a reflective deformable mirror is used for carrying out aberration correction on the compensation points in advance; and automatically loading an optical aberration compensation value closest to the center of the sub-region according to the central coordinate position of the sub-region so as to ensure that the image resolution near the optical diffraction limit is kept in the whole view region.

A display for providing an image to an eye of an observer is disclosed. An image generator provides image illumination corresponding to the image to a substrate having mutually-parallel major external surfaces for propagation within the substrate. An intermediate optical arrangement including at least one astigmatic optical element directs the image illumination from the image generator so as to propagate within the substrate in a first in-plane direction by internal reflection. A reflective optical arrangement having cylindrical optical power reflects the image illumination so as to propagate in a second in-plane direction by internal reflection. A coupling-out arrangement couples out the collimated image illumination towards an eye of an observer. The intermediate optical arrangement includes an element deployed to generate a corrective optical aberration that at least partially cancels out with a characteristic aberration introduced by the reflective optical arrangement.