225 results about "Astigmatism" patented technology

An ophthalmic lens configured to correct and / or treat at least one condition of the eye (e.g., presbyopia, myopia, hyperopia, astigmatism, binocular vision disorders, night vision image quality, and / or visual fatigue syndrome) comprising: a base power profile; and at least one pulse selected to modify the base power profile.

This utility model provides a visual safety guidance device for highway tunnels, relating to the technical field of tunnel guidance devices. It includes a mounting frame installed at the top of the tunnel facing the centerline of the wall at the diversion point, and several reflective modules mounted on the mounting frame. The mounting frame has inverted buckle portions on both sides of its bottom, and recessed holes are equidistantly spaced on the mounting frame, with spring bolt assemblies installed within these recessed holes. Each reflective module consists of a mounting base and a reflector, which are fixed together by bolts. The mounting base has a snap-fit ​​groove extending to both ends on one side corresponding to the recessed hole. This device is installed at the top of the tunnel, connecting to the diversion point at the tunnel's front end. Through the tunnel's lighting and the reflection from the reflectors, it effectively guides the driver's line of sight at the tunnel's front end, preventing collisions caused by obstructed vision or momentary distraction, especially for drivers with poor vision or astigmatism.

The invention discloses virtual image detection equipment, which comprises a front diaphragm; the front lens group is arranged on the second side of the front diaphragm along the optical axis; a rear lens group disposed on a second side of the front lens group along the optical axis; the relay lens group sequentially comprises a relay front group and a relay rear group from the first side to the second side along the optical axis, and the relay front group and the relay rear group are coaxially and fixedly arranged; the refraction adjusting group comprises a first moving component arranged between the relay front group and the relay rear group and a second moving component arranged in the relay rear group; the first moving component comprises a cylindrical mirror which is arranged on the optical axis in a switchable and back-and-forth moving manner, and is used for adjusting the astigmatism diopter; the second moving component is arranged on the optical axis in a front-back moving mode and used for adjusting the diopter of the spherical surface. And the light receiving assembly is arranged on the second side of the relay lens group along the optical axis and is used for receiving the light from the relay lens group to carry out virtual image detection.

The optical detection system and method for suppressing stray light provided in this application include an illumination optical path and an imaging optical path sharing a common objective lens. An illumination beam transmitted along the illumination optical path illuminates the wafer under test through the objective lens and is reflected by the wafer under test to form an imaging beam. The imaging beam is transmitted along the imaging optical path through the objective lens for imaging. By arranging optical wedges in the illumination optical path, the illumination beam is incident at a non-parallel or non-coincident angle to the optical axis of the objective lens. Back-reflected stray light generated by multiple reflections between the lenses inside the objective lens is removed from the imaging optical path, which significantly suppresses back-reflected stray light and eliminates the influence of stray light inside the objective lens on imaging.

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 discloses a kind of visual calibration device of astigmatism eye focal line, comprising: axial position scale board, board face is printed with E-type visual target for distant visual detection;Cross visual target disc, coaxially rotatably embedded in through-hole;Several groups of pinholes, each group is arranged along visual target line two sides straight line, pinhole center connecting line is parallel with corresponding visual target line;Fixed shaft is through cross visual target disc center, and is mechanically connected with transmission device;LED light source, set in axial position scale board back surface.The utility model has beneficial effect: the utility model can provide clear and visible and invariable measured astigmatism eye objective existence astigmatism focal line of the person being examined, and can accurately determine the clear criterion that cross visual target line coincides with the focal line, so as to maximumly improve the accuracy of astigmatism eye astigmatism axial calibration, reduce the deviation of calibration astigmatism axial direction and actual astigmatism axial direction, improve determination accuracy and determination work efficiency.

An information processing device (110) comprises: an optical calculation unit (112) that calculates each of the optical path of light from an imaging field of view in an imaging device that performs imaging using an optical element and the optical path of light from outside the imaging field of view that is outside the imaging field of view, calculates stray light produced by the optical element and a point spread function (PSF) of the optical element, and generates a degraded image in which the stray light and the PSF are applied to an ideal image that is handled as correct answer data in teacher data; a noise image generation unit (113) that generates a noise image including noise predicted to occur in an imaging element of the imaging device during imaging; an image calculation unit (114) that superimposes the noise image on the degraded image to generate a learning image; and a teacher data generation unit (115) that generates teacher data in which the learning image is employed as training data and an image corresponding to the imaging field of view of the imaging device within the ideal image is employed as correct answer data.

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.

This invention proposes a non-contact in-vehicle alcohol screening device and system. It includes a transmitting module, a receiving module, a main control and power module, a housing, and a light-shielding structure. The alcohol screening device is connected to a remote management platform. The device also includes a communication module for sending test results, test time, and device identification information to the remote management platform. The transmitting module uses dual Class 1 low-power lasers, combined with real-time current monitoring and a self-locking switch in the main control module, providing triple protection for human safety through light source, circuitry, and mechanical operation. This ensures that even direct laser light into the eyes is harmless, meeting the safety and compliance requirements of law enforcement scenarios. The receiving module is equipped with a bandpass filter with a corresponding center frequency to effectively suppress ambient stray light and circuit noise. Simultaneously, the dual-wavelength differential design, through the ratio calculated by the main control module, jointly cancels common interferences such as water vapor and window reflections, significantly improving the reliability of the screening signal in complex environments.

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.

1. The name of the design product: flat mirror (terminator astigmatism). 2. The use of the design product: for lighting, reflecting and focusing light. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: design 1 front view. 5. Design 1 is designated as the basic design.

The application discloses a kind of based on machine vision's patch type infrared receiving head appearance detection method and system, belong to computer vision detection field.Method includes: through bottom collimating backlight source irradiation to be measured receiving head, utilize the image of two telecentric cameras of symmetrical arrangement Synchronous acquisition pin;Sub-pixel level feature positioning is carried out to image and rejects reflection false feature point;Based on binocular vision principle, reconstruct the three-dimensional space coordinates of pin end;Adopt lowest multipoint method to construct reference plane, calculate the vertical distance of each pin to reference plane as coplanarity deviation;Deviation and tolerance threshold are compared, and output determination signal.System includes object table, bottom collimating backlight source, double-side telecentric camera, hardware level synchronous trigger unit, image processing and three-dimensional reconstruction unit, coplanarity evaluation and determination unit.The application can high-precision measurement pin coplanarity, eliminate perspective distortion and stray light interference, suitable for on-line full inspection on automatic production line.

An electroactive lens having stacked rotating cylindrical electroactive lens elements can provide cylindrical refractive power along more axes than the cylindrical electroactive lens elements themselves. For example, six stacked cylindrical electroactive lens elements (each aligned with a different lens meridian) can produce cylindrical refractive power along fifteen distinct meridians when actuated by a maximum of three at a time. If these fifteen meridians are arranged at 12° increments, the lens stack can provide well-aligned cylindrical refractive power to correct astigmatism along any axis. Each cylindrical electroactive lens element in the stack may include a liquid crystal layer actuated by linear electrodes parallel to each other and orthogonal to both the cylindrical axis and the optical axis of the cylindrical electroactive lens element. The electroactive lens may also include spherical lens elements that provide spherical refractive power in addition to any net spherical refractive power produced by the stacked cylindrical electroactive lens elements.

The invention provides a rectangular field-of-view design method for an ultraviolet non-line-of-sight communication receiving end and application thereof, and belongs to the technical field of wireless optical communication, the method comprises the following steps: pre-determining the center distance length of a light shield and the upper field-of-view angle, the lower field-of-view angle, the left field-of-view angle and the right field-of-view angle of a rectangular receiving field-of-view; based on the center distance length, the upper view field angle, the lower view field angle, the left view field angle, the right view field angle and the width and length of the rectangular light sensing surface, calculating structural parameters of a light shield used for generating the rectangular receiving view field; wherein the structural parameters comprise the upper and lower edge lengths, the left and right edge lengths and the position of a vertical center point of a larger rectangular opening of the light shield. Through the design of the rectangular view field and the accurate matching of the rectangular light-sensitive surface, the photon receiving efficiency is remarkably improved, stray light and electromagnetic interference are effectively inhibited, and thus the signal-to-noise ratio of weak light signal detection and the system sensitivity are improved.

The invention discloses a large-view-field and high-temporal-spatial-resolution transmission electron microscope in-situ imaging method for a microcosmic electrochemical process, which comprises the following steps: step 1, loading an electrode material particle sample to be detected on a carrying table, inserting the sample into a transmission electron microscope vacuum lens cone along with a sample rod, identifying a target sample under low magnification, and carrying out basic adjustment on an electron microscope; 2, adjusting magnification times to ensure that an observation area is completely incorporated into an imaging view field, selecting an imaging mode, eliminating astigmatism, and adjusting the focal length of an objective lens until a sample particle image interface is clear; and step 3, selecting a CCD camera, setting an acquisition frame rate, and performing ultrafast acquisition of images or videos. The transmission electron microscope in-situ imaging technology giving consideration to both the large view field and the high space-time resolution has practical application value in research of the electrochemical reaction kinetics process of the granular material.

This utility model discloses an adjustable pupillary distance clip-on eyeglasses lens suitable for clinical optometry, comprising a frame and a replaceable lens body. The frame has a clamping part; the frame includes a frame beam, which is hollow inside and contains a first magnet, the length of which is less than the length of the frame beam. The bottom of the frame beam is flat, and the first magnet has an adjustment slider for adjusting the position of the first magnet inside the frame beam; the replaceable lens body includes a frame beam, which contains a second magnet, which is cylindrical and can rotate around an axis inside the frame beam; a lens is fixedly mounted on the bottom surface of the frame beam, and the top of the frame beam is a flat surface that matches the bottom of the frame beam. This solution allows people with moderate to high myopia, hyperopia, and astigmatism who need different prescriptions for near and far vision to conveniently clip an additional near lens onto their existing lenses while wearing their original eyeglasses, and the pupillary distance can be adjusted to suit different people.

This invention discloses an adaptive intelligent focusing liquid crystal lens and its implementation method, belonging to the field of liquid crystal optical device technology. It aims to solve the technical problems of existing liquid crystal focusing lenses, such as low adjustment accuracy, slow response speed, limited adaptability to various scenarios, inability to achieve adaptive matching across the entire refractive range, and insufficient wearing comfort. The liquid crystal lens comprises a protective lens layer, a first liquid crystal layer, an intermediate insulating layer, a second liquid crystal layer, an optical substrate layer, and a coating layer stacked sequentially. Combined with a drive control module and a sensing and acquisition module, it achieves stepless continuous adjustment of the refractive power. The implementation method involves acquiring human eye refractive parameters and ambient light parameters through the sensing and acquisition module, and then outputting a precise voltage signal through the drive control module to regulate the molecular arrangement of the two liquid crystal layers, achieving adaptive intelligent focusing. This invention can achieve a refractive adjustment range of -10.00D to +6.00D, a response time ≤200ms, and an optometric accuracy of ±0.12D. It is suitable for various vision needs such as myopia, hyperopia, presbyopia, and astigmatism, balancing medical-grade accuracy with consumer-grade wearing comfort, and can be widely applied to wearable vision devices such as adaptive smart glasses.

The invention discloses a pair of functional glasses with myopia prevention and astigmatism training functions, which comprises a main frame, telescopic locking adjusting assemblies are sleeved in two sides of the main frame, and the tail ends of the adjusting assemblies are hinged to glasses leg assemblies (comprising side frames and telescopic legs); a nose support and an n-shaped lens guide frame are arranged on the lower surface of the main frame, and two sets of lockable lens assemblies are connected to the lower surface of the lens guide frame in a sliding mode. A lens main body of the lens assembly is provided with a central optical area (correcting retinal center defocus), a vertical upper concave lens area (a fan-shaped annular concave lens, and the area ratio of the concave lens to a blank area is 2: 3-3: 2), a nasal side / bitamporal diffraction area (a high-filling-density convex lens) and a vertical lower edge comfortable area (a low-filling-density convex lens). The myopia prevention and astigmatism training device can adapt to different facial forms, myopia prevention and astigmatism training are flexibly achieved, abnormal extension of the ocular axis is restrained through a dynamic defocus signal, the prevention and control effect can still be maintained when the glasses slide down or the degree rises, and the use stability and comfort are improved.

Anamorphic lens assembly having first and second anamorphic lens components, each having an astigmatism at infinity focus that is greater than an astigmatism at close focus. As the anamorphic lens assembly transitions from infinity focus to close focus, the astigmatism decreases for both of the first and second anamorphic lens components, which allows for proper focusing at close focus (when the object is close to the lens assembly). The astigmatism of the first anamorphic lens component may be equal and opposite to the astigmatism of the second anamorphic lens component, such that the astigmatisms of the anamorphic lens components cancel out one another.

The invention provides an ultrathin diffraction prescription lens acceptance report output method and system, a storage medium and equipment applied to the field of lens manufacturing and quality acceptance, and the method comprises the steps: building a cross-wavelength and cross-field image quality evaluation model through defining a field-of-view sampling point set; and calculating or measuring a point spread function, a modulation transfer function, distortion and stray light and ghost image budget indexes, and feeding back measurement data such as manufacturing tolerance, residual layer difference and warping to an optimizer, thereby realizing closed-loop consistency of the whole process of'design-manufacturing-measurement-acceptance '. The system can output an acceptance report containing failure reason code mapping, threshold version information, an original data hash abstract and a digital signature, and provides support for gating decision and traceable auditing in the mass production process. According to the scheme, through the closed-loop mechanism, the consistency and traceable gating of all links of design, manufacturing, metering and acceptance are ensured.

The invention discloses a compact arbitrary transverse mode laser. The laser comprises a pumping source, a pumping focusing optical system, a laser total reflective mirror, a laser gain medium, a laser output mirror and an astigmatism mode converter, the pumping source emits pumping light in a gain medium absorption band; the pump light is focused and then enters the gain medium; the gain medium absorbs the pump light and generates laser gain; the total reflective mirror highly reflecting laser wavelength and the output mirror partially transmitting the laser wavelength jointly form a simple linear resonant cavity. When the laser gain medium is inclined by a preset angle relative to the optical axis of the resonant cavity, meridian light and sagittal light pass through different optical paths of the gain medium to introduce astigmatism, an HG mode facing the directions of two astigmatism symmetry axes can be reproduced, and modes facing other directions cannot be reproduced due to the astigmatism effect. Therefore, when the pump light deviates from the axis of the resonant cavity in the directions of the two astigmatic symmetry axes, any high-order HG mode with mode ordinal numbers not being zero in the two directions can be excited, and any LG mode laser can be generated through astigmatic mode conversion.

The utility model provides an optical lens. The optical lens comprises a lens barrel, first to seventh lenses, a third spacing element and a fourth spacing element, wherein the first to seventh lenses, the third spacing element and the fourth spacing element are arranged in the lens barrel; the center thickness CT4 of the fourth lens on an optical axis, the air spacing T34 of the third lens and the fourth lens on the optical axis, and the maximum thickness CP4 of the fourth spacing element meet the following conditions: 1.07 < = (CP4 + CT4) / T34 < = 1.5; the combined focal length f45 of the fourth lens and the fifth lens and the spacing distance EP34 between the third spacing element and the fourth spacing element meet the condition that f45 / EP34 is larger than or equal to 18.82 and smaller than or equal to 24.58. According to the utility model, the problem of stray light caused by the optical lens in the prior art in order to meet the assembly stability is solved.

The invention provides a DLP projection lens applied to automobile external illumination, and relates to the technical field of optical imaging. Comprising a first group, a diaphragm, a second group, an equivalent prism, a chip protection lens and a display chip which are sequentially arranged from an object space side to an image space side along an optical axis, the display chip is used for emitting light, the equivalent prism is used for receiving the emitted light and transmitting the emitted light to the second group, the second group is used for performing spherical aberration correction, chromatic aberration correction and field curvature correction on the emitted light to obtain first optimized light, and the first optimized light penetrates through the diaphragm to reach the first lens group; the first group is used for correcting coma, astigmatism and curvature of field of the first optimized light again to obtain second optimized light for imaging in a target area; according to the invention, the technical problem that the existing projection lens cannot meet the requirements of vehicle gauge grade weather resistance, large target surface, high luminous efficiency, dynamic thermal stability and compact design at the same time is solved.

The invention relates to a device with an optical unit (3) which has at least one inner wall (35) provided with a surface structure (351). The surface structure (351) has cavities (352). Such a device is advantageously used in a head-up display with glare suppression.

The present invention provides an optical device that shifts the path of travel of input light and outputs output light along optical paths parallel to and different from the optical path of the input light, the optical device being provided with: a first prism body and a second prism body each having an incident surface and an exit surface that are not parallel to each other; and a displacement amount adjustment mechanism that adjusts the amount of displacement of the light by changing the distance therebetween. The first prism body and the second prism body are respectively provided with a first component and a second component in a state that the end surfaces are butted with each other, one end surface of the first component forms an incidence surface, one end surface of the second component forms an emission surface, and the Abbe number of the second component is different from that of the first component. The present invention can suppress an increase in astigmatism difference, and can also suppress the influence of chromatic aberration caused by wavelength dependence of the refractive index of a prism material.

The embodiment of the invention provides a lens module and near-to-eye display equipment. Wherein the lens module comprises a first lens, a second lens, an interlocking structure and a shading piece, the first lens and the second lens are sequentially arranged in the optical axis direction, and the interlocking structure is directly formed on the opposite surfaces of the first lens and the second lens and used for directly positioning and connecting the two lenses; the interlocking structure is configured to limit radial translation of the two lenses in a plane perpendicular to the optical axis through point contact fit; the circumferential rotation of the two lenses around the optical axis is limited through line contact fit; the inclination of the two lenses relative to the optical axis is limited through surface contact fit; the shading part wraps the periphery of an assembly of the first lens and the second lens and is used for eliminating stray light, and the shading part and the interlocking structure jointly maintain connection and fixation of the first lens and the second lens.

Provided is a technique capable of suppressing the generation of stray light even when a coating film is provided so as to cover a substrate protrusion on a lens substrate that is helpful for a myopia suppression effect. The present invention relates to a spectacle lens and a technique related thereto, and provides a spectacle lens and a technique related thereto, the spectacle lens having: a lens base material provided with a plurality of base material protrusions protruding from a base material base on a surface of the lens base material; and a coating film which is provided so as to cover the plurality of base material protrusions, and which has a plurality of recesses and protrusions on the outermost surface thereof, said coating film having a stray light rate of 30% or less.

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