39results about How to "Guaranteed clear imaging" patented technology

The invention relates to a large field-of-view stray light PST (point source transmittance) testing method and a large field-of-view stray light PST testing device. The large field-of-view stray light PST testing device comprises a large dynamic range light source, a collimator, a clean room, a high-load turntable, an EMCCCD (electron multiplying charge coupled device) and a data acquisition and processing system, wherein the collimator is arranged on the path of emergent light of the large dynamic range light source; the EMCCD is arranged on the high-load turntable and is electrically connected with the data acquisition and processing system; the large dynamic range light source is electrically connected with the data acquisition and processing system; the high-load turntable is arranged on the path of emergent light after passing through the collimator; and the large dynamic range light source, the collimator, the high-load turntable, the EMCCD and the data acquisition and processing system are arranged in the clean room. The large field-of-view stray light PST testing method and the large field-of-view stray light PST testing device provided by the invention have the advantages that the stray light inhibiting ability of the lens hood of a astronautic camera can be effectively evaluated on the ground, the signal-to-noise ratio of the entire camera can be estimated, the astronautic camera can be guaranteed to pick up clear images after the astronautic camera is launched into the sky, the field of view is ultralarge and the accuracy is high.

The invention relates to a large-diameter stray light measuring device and a testing method. The large-diameter stray light measuring device comprises a target simulator, a spherical collimator tube, a detection system and a data acquisition and processing system. The target simulator is disposed on an incident path of the spherical collimator tube. An optical system to be detected is disposed on an emergent path of the spherical collimator tube. The detection system is disposed on an image surface of the optical system to be detected. The detection system is connected with the data acquisition and processing system. The large-diameter stray light measuring device and the testing method can be used to effectively assess stray light inhibiting ability of the optical system structure.

The invention discloses an OLED display panel and a manufacturing method thereof. A through hole is formed in the OLED display panel; the through hole comprises a first hole cavity and a second hole cavity; the first hole cavity cuts off a part of a membrane layer exposed by a side wall of the through hole to block a path for water vapor to invade the OLED display panel from the side wall of the through hole; and the second hole cavity penetrates through a substrate, so that clear imaging of a camera at the lower part of a screen is ensured. The OLED display panel has the beneficial effects that part of the membrane layer around the through hole is cut off to cut off a water vapor invasion channel on the side surface of the through hole, so that the packaging reliability of an OLED deviceis guaranteed, the light transmittance of the through hole is improved, and the clear imaging of the camera at the lower part of the screen is guaranteed.

The invention discloses a total station-based remote large-view-field binocular calibration method. For realizing the method, the method involves a binocular camera, a total station and a marker, wherein a distance between the binocular camera and the marker is 100m; the distance between the total station and the marker is greater than 10m; and the binocular camera is electrically connected with acomputer system PC. The method comprises the following steps of (1), performing image acquisition: carrying out the image acquisition by utilizing the binocular camera; (2) performing angular point extraction: adopting a characteristic that one marker only has one feature point, wherein the angular point extraction is divided into two parts including angular point detection and sub-pixel positioning; (3) performing marker three-dimensional coordinate measurement: setting a single marker to only have one feature point, and when the number of markers is increased for meeting measurement demands, setting three-dimensional coordinates of the feature point of the marker measured by remotely utilizing the total station to be (X, Y, Z); and (4), performing camera calibration. The calibration method solves the problems of low precision and low flexibility of remote large-view-field calibration in an existing calibration method, and meets actual demands.

The invention relates to a long-wave infrared zoom lens unit comprising a first lens, a second lens, a third lens, a fourth lens and a fifth lens that are arranged from an object side to an image side successively along an optical axis. At least two of the lenses are made of an infrared material with a low thermal expansion coefficient; and each of the lenses has at least one diffraction surface. Because of the infrared material with a low thermal expansion coefficient, the influence on the lens by the temperature change is reduced and occurrence of an image plane drift phenomenon, caused by the temperature change, of the lens is reduced. The lens has the small thermal expansion coefficient and thus the lens has the good athermalization performance, so that the long-wave infrared zoom lens can be used in a large environment with temperature changing. Meanwhile, because the lens has the athermalization performance, the athermalization performance of each lens is realized by reducing the adjusting distances between the lenses, so that the size of the long-wave infrared zoom lens unit is reduced.

The invention relates to a minitype single-chip LCOS projection optical engine which is composed of a projection lens, a PBS beam splitter, a field lens and an LCOS chip which are sequentially arrayedalong a system imaging optical axis from a screen side to an image plane side, the PBS beam splitter and the imaging optical axis form a 45-degree angle, and an illuminating system of an optical engine is formed by an LED light source lens, a first condenser lens, a cylindrical lens and a second condenser lens which are sequentially arrayed along the optical axis of the illuminating system. The optical axis of the illuminating system and the optical axis of an imaging optical path from a 90-degree angle, and the PBS beam splitter, the field lens and the LCOS chip are commonly used by the imaging optical path and an illuminating optical path. An illuminating central beam is vertically radiated on the LCOS chip after being reflected by the PBS beam splitter, the system moves forward and backward to realize focusing along the imaging optical path by the projection lens, so as to ensure to realize to image clearly at different distances. The system has low cost and good process and is suitable for batch production.

The invention belongs to the technical field of optical technologies and medical optical images, particularly relates to a scanning synchronous imaging and indicating device and method for venous vessels and aims to receive a scanning imaging signal by using a linear array photoelectric sensing element, simulate or digitalize a photoelectric signal and form indicating vessels by using a visible light LED array in a discrete light spot form, and image processing with a large data volume and image calibration are eliminated. The technical scheme adopted by the invention is that the scanning synchronous imaging and indicating device comprises a near-infrared LED light source for illuminating the vessels and an imaging lens, wherein a scanning galvanometer is arranged between the imaging lens and an imaging plane thereof; the linear array photoelectric sensing element capable of sensing near-infrared light is arranged on the image plane reflected by the scanning galvanometer; a near-infrared interference filter is arranged between the imaging plane where the linear array photoelectric sensing element is positioned and an optical axis of reflecting light of the scanning galvanometer; the near-infrared interference filter is parallel to a mirror surface of the scanning galvanometer during immobility; the visible light LED array is connected to a driving end of a signal processing and driving circuit; a projection lens is arranged between the visible light LED array and the near-infrared interference filter.

The invention discloses a hyperspectral continuous-light laser radar system for detection of tiny underwater particles. The hyperspectral continuous-light laser radar system comprises a laser transmitting unit, a laser receiving unit, a light splitting unit, a light path compensation unit, a photoelectric detection unit and a data acquisition and analysis unit, wherein a light source of the laser transmitting unit is a continuous laser source and transmits continuous laser to a to-be-detected object, and backscattered light of the to-be-detected object is reflected to the light path compensation unit and the light splitting unit and is converged on the photoelectric detection unit finally; the photoelectric detection unit is connected with the data acquisition and analysis unit and signals are analyzed through the data acquisition and analysis unit; the laser transmitting unit is connected with the photoelectric detection unit, and the photoelectric detection unit transmits a synchronizing pulse signal and synchronously modulates light emitting frequency of the laser transmitting unit. According to the hyperspectral continuous-light laser radar system, continuous-light laser is taken as the light source, spatial distribution detection is realized with an imaging method, optical elements are adopted for adjustment, higher resolution is realized, and synchronizing detection for spectrum and space information of the tiny underwater particles is realized.

The invention relates to a high-resolution economic 2.6mm lens, comprising a main lens barrel, wherein a front lens set A and a front lens set B are sequentially arranged in the main lens barrel in the incident light direction, a diaphragm is arranged between the front lens set A and the front lens set B, and a filter is arranged at the rear end of the front lens set B. The lens is simple in structure and small in number, can reach high-quality pixels by day, and can also ensure high quality of images through infrared supplementation in poor light or at night; and the lens is made of a little glass, so the assembly difficulty of the lens is relieved and the production cost is reduced.

The invention discloses an optical lens achieving temperature compensation. The optical lens comprises a lens outer shell, and lens bodies are arranged inside the lens outer shell from object space to image space and made of optical glass and / or optical resin. The lens bodies sequentially comprise the first lens body, the second lens body, the third lens body and the fourth lens body. The first lens body is a straw-hat-shaped lens body with negative focal power, the second lens body is a bi-convex type lens body with positive focal power, the third lens body is a bi-convex type lens body with positive focal power, and the fourth lens body is a bi-concave type lens body with negative focal power. A diaphragm element is arranged between the first lens body and the second lens body, the fourth lens body is connected with a color filter, visible light bands and near-infrared bands guided into the lens are focused on the same focal plane, and therefore the optical lens can clearly perform imaging in day and night modes.

The invention provides a zoom lens, a working method thereof and an imaging device, wherein the zoom lens comprises a focusing lens group with negative optical power, a diaphragm, a zoom lens group with positive optical power and moving in the positive and reverse directions of the optical axis of the zoom lens, a fixed lens group with negative optical power and a light filter which are sequentially arranged from an object side to an image side; the focal length f1 of the focusing lens group, the focal length f2 of the zoom lens group and the focal length f3 of the fixed lens group satisfy therequirements shown in the description. The zoom lens has the advantages of full-range infrared focusing, no virtual focus at high and low temperatures and the like.

The invention relates to a zoom lens. The zoom lens comprises a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power and a fourth lens group having positive refractive power arranged in order from the object side to the image side along the optical axis, wherein the second lens group and the fourth lens group reciprocally move along the optical axis during zooming, from the object side to the image side along the optical axis, a first lens of the first lens group is set as a negative refractive power lens, and a first lens of the second lens group is set as a negative refractive power lens. The zoom lens is advantaged in that the FNO reaches the star level, the image side F number reaches 1.0-1.4, the lens is enabled to get enough light, the signal-to-noise ratio is reduced with sufficient illumination, so a clear image is obtained, an aperture value of the zoom lens is nearly constant in the zoom process, and that brightness of frames does not change as the focal length changes during zooming is guaranteed.

A wide-angle telephoto imaging optical system is composed of a front lens group with negative focal power and a rear lens group with positive focal power which are sequentially arranged from an objectside to an image side. The front lens group is composed of a negative first lens, a negative second lens and a positive third lens. The rear lens group is composed of a positive fourth lens, a negative fifth lens, a positive sixth lens and a negative seventh lens. A diaphragm is located between the front lens group and the rear lens group. The imaging system meeting the conditional expression ofthe invention can obtain a larger focal length while meeting a larger field angle.

The invention discloses a single-chip internal-focusing optical lens comprising a first lens 1 having a negative focal power, a second lens 2 having a positive focal power, a third lens 3 having a negative focal power, a fourth lens 4 having a positive focal power, a fifth lens 5 having a positive focal power, a sixth lens having a positive focal power, a seventh lens 7 having a negative focal power, an eighth lens 8 having a negative focal power, a ninth lens 9 having a positive focal power, a filter 10, a compensating piece 11, and an image plane 12. According to the invention, with back-and-forth movement of the ninth lens, field curvature compensation and the focusing functions under different object distances are realized; and clear imaging of the lens at different object distances isensured under the condition of unchanging of the image plane.

The invention relates to the technical field of machine vision, and discloses a bearing defect modular detection device and method based on machine vision, and the device comprises four independent detection stations which can complete the image collection of the end face, the inner circle chamfer surface, the outer circle surface, the outer chamfer surface and the inner circumferential surface of a bearing outer ring / bearing inner ring; the image analysis device with a preset specific image detection algorithm is used for analyzing and processing, possible surface defects of the bearing are detected and classified; finally, the detection results of the four stations are synthesized, whether the detected bearing is qualified or not is judged, and the problems that an existing bearing detection method is complex in detection process and the universality is poor are solved.

The invention provides a surface quality detection device and method for an ellipsoidal glass shell, relates to the surface quality detection technology for glass shells of photomultipliers and aims to solve the problem that the surface quality of the ellipsoidal glass shells of 20-inch photomultipliers cannot be detected automatically. A support frame is fixed on a rotary table, a light source isfixed on the support frame, an oval with an opening in the lower end is defined by a guide rail, and an industrial camera slides along the inner wall of the guide rail; a telecentric lens is arrangedon the industrial camera; light emitted by the light source passes through the tested ellipsoidal glass shell and the telecentric lens sequentially and is received by the industrial camera; rotationof the rotary table is controlled by a stepper motor controller I, and the position of the industrial camera on the guide rail is controlled by a stepper motor controller II; both the stepper motor controller I and the stepper motor controller II are connected with a PC; the industrial camera is connected with the PC. The surface quality detection device and method have the beneficial effects thatdetection is comprehensive, imaging is clear, the structure is simple, and the operation is simple and convenient.

The invention provides a high dynamic range short focal length projection system, which comprises a projection device and a projection screen. The projection device comprises: exposure module, HDR image generation module, projection imaging module, refractive lens assembly, aspheric mirror, the exposure module has a plurality of exposure quantities, the HDR image generation module generates an HDRimage according to images under different exposure amounts, the projection imaging module comprises a refractive lens group, the aspheric mirror projects the generated HDR image onto the projection screen, The projection screen comprises a backlight and a display screen mounted on the backlight, the backlight comprises an upper substrate, a lower substrate and a backlight layer coated on the upper substrate, and the display screen comprises a front substrate and a filter layer positioned between the front substrate and the upper substrate. The high dynamic range short focal length projectionsystem of the invention improves the definition of the image through the HDR technology, and at the same time, the trapped light projection screen is adopted, which is favorable for ensuring the clearimage.

Disclosed is a large-target-surface miniaturized non-refrigeration infrared continuous zooming optical system. The large-target-surface miniaturized non-refrigeration infrared continuous zooming optical system comprises a first meniscus positive lens, a biconcave negative lens, a biconvex positive lens, a second meniscus positive lens, a third meniscus positive lens and a detector; the lens adoptsa refractive-diffractive hybrid system; through reasonable distribution of the focal power of each lens, the number of lenses of the system is reduced, the volume of the system is reduced, and the weight of the system is lowered; the zooming curve of the system is smooth and continuous, and the phenomenon of stagnation in the zooming process is effectively avoided; by adopting a mode of axially moving the third meniscus positive lens, the image plane off-focus compensation of the system in the temperature range of minus 40 DEG C to plus 60 DEG C and the off-focus compensation of the distancechange of an observed object are realized, the clear imaging of objects with different distances is ensured, and the system complication caused by the non-refrigeration design is avoided; and the large-target-surface miniaturized non-refrigeration infrared continuous zooming optical system fills the blank of a continuous zooming optical system which is adapted to a 1024 * 768 long-wave non-refrigeration type detector in China.

The invention relates to a zoom lens which comprises a compensation group (G1) with negative focal power, a first fixed group (G2) with positive focal power and a zoom group (G3) with positive focal power which are sequentially arranged from an object side to an image side along an optical axis, and further comprises a second fixed group (G4) located on the image side of the zoom group (G3). In the zooming process, the first fixed group (G2) and the second fixed group (G4) are fixed relative to image plane positions, and the compensation group (G1) and the zoom group (G3) can move along an optical axis. The zoom lens provided by the invention has the characteristics of ultra-large aperture, large target surface and low cost.

The invention provides an optical lens, which sequentially comprises, from an object side surface to an imaging surface, a first lens with negative focal power, wherein the objective side and the image side near the optical axis are both concave surfaces; a second lens with positive focal power; a diaphragm; a third lens with positive focal power, wherein the image side of the third lensnear the optical axis is a convex surface; a fourth lens with positive focal power, wherein the object side and the image side of the fourth lens near the optical axis are convex surfaces; a fifth lens with negative focal power; and a sixth lens with negative focal power, wherein the image side of the sixth lens near the optical axis is a concave surface, wherein the FOV of the optical lens is greater than 150 degrees; the distance TTL from the object side to the image of the first lens of the optical lens is less than 5.8 mm.

The invention relates to a large field-of-view stray light PST (point source transmittance) testing method and a large field-of-view stray light PST testing device. The large field-of-view stray light PST testing device comprises a large dynamic range light source, a collimator, a clean room, a high-load turntable, an EMCCCD (electron multiplying charge coupled device) and a data acquisition and processing system, wherein the collimator is arranged on the path of emergent light of the large dynamic range light source; the EMCCD is arranged on the high-load turntable and is electrically connected with the data acquisition and processing system; the large dynamic range light source is electrically connected with the data acquisition and processing system; the high-load turntable is arranged on the path of emergent light after passing through the collimator; and the large dynamic range light source, the collimator, the high-load turntable, the EMCCD and the data acquisition and processing system are arranged in the clean room. The large field-of-view stray light PST testing method and the large field-of-view stray light PST testing device provided by the invention have the advantages that the stray light inhibiting ability of the lens hood of a astronautic camera can be effectively evaluated on the ground, the signal-to-noise ratio of the entire camera can be estimated, the astronautic camera can be guaranteed to pick up clear images after the astronautic camera is launched into the sky, the field of view is ultralarge and the accuracy is high.

The invention discloses a two-degree-of-freedom guide rail for ellipsoidal glass bulb detection and relates to a two-degree-of-freedom guide rail. The problem that a large-size ellipsoidal glass bulbis difficult to machine because the conventional ellipsoidal glass bulb is high in processing difficulty and the machining precision is difficult to ensure is solved. An outline of a guide rail assembly is semicircular, a first groove and a second groove are formed in a connecting slide block, the connecting slide block is arranged on the guide rail assembly by the first groove and connected withthe guide rail assembly in a sliding manner; the first groove and the second groove in the connecting slide block are mutually perpendicular to each other; a camera connecting support rod is insertedinto the second groove of the connecting slide block; and the camera connecting support rod points at a center of a circle of the guide rail assembly. The two-degree-of-freedom guide rail disclosed bythe invention is applied to the ellipsoidal glass bulb detection.

The invention belongs to the technical field of optical technologies and medical optical images, particularly relates to a scanning synchronous imaging and indicating device and method for venous vessels and aims to receive a scanning imaging signal by using a linear array photoelectric sensing element, simulate or digitalize a photoelectric signal and form indicating vessels by using a visible light LED array in a discrete light spot form, and image processing with a large data volume and image calibration are eliminated. The technical scheme adopted by the invention is that the scanning synchronous imaging and indicating device comprises a near-infrared LED light source for illuminating the vessels and an imaging lens, wherein a scanning galvanometer is arranged between the imaging lens and an imaging plane thereof; the linear array photoelectric sensing element capable of sensing near-infrared light is arranged on the image plane reflected by the scanning galvanometer; a near-infrared interference filter is arranged between the imaging plane where the linear array photoelectric sensing element is positioned and an optical axis of reflecting light of the scanning galvanometer; the near-infrared interference filter is parallel to a mirror surface of the scanning galvanometer during immobility; the visible light LED array is connected to a driving end of a signal processing and driving circuit; a projection lens is arranged between the visible light LED array and the near-infrared interference filter.

The present invention relates to a zoom lens comprising a compensation lens group (G1) having a negative refractive power, a stop (STO), and a zoom lens group (G2) having a positive refractive power arranged in order along an optical axis from an object side to an image side, the compensation lens group (G1) comprising a first lens (L1), a second lens (L2), and a third lens (L3) along the optical axis from the object side to the image side, the zoom lens group (G2) comprises fourth optical elements (B4, L4), a fifth lens (L5), a sixth lens (L6), a seventh lens (L7) and an eighth lens (L8), and the eighth lens (L8) is a convex-concave lens. According to the zoom lens, infrared confocal, athermalization and ultralow cost can be realized.

An infrared continuous zoom optical system with a long focal length and a large target surface, comprising a first meniscus positive lens, a biconcave negative lens, a biconvex positive lens, a meniscus negative lens, a second meniscus positive lens, and a third meniscus Positive lenses and detectors; the above-mentioned lenses adopt a refraction-diffraction hybrid system, which reduces the number of system lenses and reduces the weight of the system through the reasonable distribution of different lens powers; the zoom curve of the system is smooth and continuous, effectively avoiding the system Stuck phenomenon occurs during the zooming process; the method of moving the third meniscus positive lens with axial fine-tuning is used to realize the image plane defocus compensation of the system in the temperature range of -40°C ~ +60°C and the distance change of the observed object. The resulting system defocus compensation ensures clear imaging of objects at different distances; the long focal length and large target surface infrared continuous zoom optical system of the present invention fills the domestic telephoto continuous zoom system adapted to 1024×768 uncooled infrared detectors Optical system blank.

The invention discloses a long-distance large-field-of-view dual-target determination method based on a total station. The realization of the method includes a binocular camera, a total station and a marker. The distance between the binocular camera and the marker is 100m, so The distance between the total station and the marker is greater than 10m, and the binocular camera is electrically connected to a computer system PC; the method includes the following steps: step (1) image acquisition: use the binocular camera for image acquisition; step (2) angle Point extraction: take a marker with only one feature point, and the corner point extraction is divided into two parts: corner point detection and sub-pixel positioning; step (3) marker three-dimensional coordinate measurement: take a single marker and set it to have only one For feature points, when the number of markers is increased to meet the measurement requirements, the three-dimensional coordinates of the feature points of the markers measured by the long-distance total station are set to (X, Y, Z); step (4) camera calibration. The invention solves the problems of low calibration accuracy and low flexibility in the long-distance and large field of view in the existing calibration methods, and meets actual needs.

The invention provides an optical lens, which comprises in sequence from the object side to the imaging surface: a first lens with negative refractive power, at the near optical axis, the object side and the image side are both concave surfaces; the first lens with positive refractive power Two lenses; diaphragm; the third lens with positive power, its image side is convex at the near optical axis; the fourth lens with positive power, at the near optical axis, its object side and image side are both a convex surface; a fifth lens with negative power; a sixth lens with negative power, the image side of which is concave at the near optical axis. Wherein, the FOV of the optical lens is >150°; the distance TTL from the object side to the image plane of the first lens of the optical lens is <5.8 mm.

The invention relates to an achromatic prime lens sequentially comprising a first lens with negative focal power, an aperture diaphragm, a second lens group with positive focal power, a third lens with positive focal power and an imaging surface with an imaging element from an object side to an image side. The second lens group comprises at least three glued lenses. According to the invention, 4Kultra-high-definition resolution is realized, the achromatic prime lens can be used with an image sensor with more than 12,000,000 pixels, so that the imaging quality is greatly improved, a larger scene picture can be shot, and the picture is still clear even if the picture is amplified; on the basis of a special lens matching mode and a surface type design, infrared confocal in the whole processfrom low temperature to high temperature is achieved by adopting a temperature drift compensation technology, clear imaging in 24 hours is ensured, and a high-contrast image can be shot even in a hazeenvironment; and a plurality of glued lenses are designed, so that the reduction degree of the picture is extremely high, and obvious bending and distortion phenomena are avoided.

The invention relates to a large-scale structure space deformation measurement device and method with a reference light beam capable of non-linearly passing across obstacles, and the device comprises a space reference emission unit and a space pose measurement unit which are designed in a split type structure, thereby improving the flexibility of the device, and having high expansibility based on a series structure. The space reference emission unit adopts cross curve structured light as a reference light beam and provides a space pose measurement reference, and the space pose measurement unit can measure space deformation relative to the reference light beam; the space reference transmitting unit and the space pose measuring unit are used in cooperation to achieve measurement reference transmission, and can be used for large-scale structure space deformation measurement under the condition that the measurement reference and a measurement end are not intervisible due to obstacle shielding. The positions of the image sensor and the image receiving screen are fixed, so that the problem that the system measurement precision is reduced along with the measurement distance in the traditional space deformation measurement technology based on photogrammetry is avoided.

A wide-angle telephoto imaging optical system is composed of a front lens group with negative refractive power and a rear lens group with positive refractive power, which are sequentially arranged from the object side to the image side; wherein the front lens group is composed of a negative first lens group. The lens, the second negative lens and the positive third lens; the rear lens group is composed of a positive fourth lens, a negative fifth lens, a positive sixth lens and a negative seventh lens, and the diaphragm is located in the front lens group and between the rear lens groups. An imaging system that satisfies the conditional expression of the present application can obtain a larger focal length while satisfying a larger angle of view.