383 results about "Low distortion" patented technology

The invention discloses a geological structure fracture automatic identification and detection system based on deep learning, and relates to the technical field of geological structure fracture automatic identification and detection, and the geological structure fracture automatic identification and detection system comprises a fracture image analysis module, a distortion intelligent evaluation module, a form adaptive correction module, a correction efficiency evaluation module and an identification data management module. The distortion intelligent evaluation module is used for acquiring imaging parameter information of each region in the crack image in real time, judging the form distortion degree of each region in the crack image under a perspective distortion condition, and dividing each region in the crack image into a low distortion region, a medium distortion region and a high distortion region according to a judgment result; and the form self-adaptive correction module is used for constructing a fracture form correction mechanism according to the division result of each region in the fracture image. According to the invention, the problem of fracture shape distortion caused by the change of a shooting view angle is solved, accurate identification and automatic correction of the fracture are realized, and the detection precision and stability are improved.

The invention provides an optical lens, which comprises nine lenses from an object side to an imaging surface along an optical axis: a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power; the seventh lens has positive focal power; the eighth lens has negative focal power; and the ninth lens has positive focal power. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the lens has one or more advantages of short focus, miniaturization, large field angle, large aperture, large target surface, low distortion and low sensitivity.

The invention provides an optical lens, which comprises nine lenses from an object side to an imaging surface along an optical axis: a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power; the seventh lens has positive focal power; the eighth lens has negative focal power; and the ninth lens has positive focal power. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the lens has one or more advantages of short focus, miniaturization, large field angle, large aperture, large target surface, low distortion and low sensitivity.

The invention provides an optical lens, which comprises nine lenses from an object side to an imaging surface along an optical axis: a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the fourth lens has negative focal power, and the object side surface of the fourth lens is a concave surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power, and the image side surface of the sixth lens is a concave surface; the seventh lens has positive focal power; the eighth lens has negative focal power; and the ninth lens has positive focal power. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the lens has one or more advantages of short focus, miniaturization, large field angle, large aperture, large target surface, low distortion and low sensitivity.

The invention provides an optical lens, which comprises nine lenses from an object side to an imaging surface along an optical axis: a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power; the seventh lens has positive focal power; the eighth lens has positive focal power; and the ninth lens has positive focal power. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the lens has one or more advantages of short focus, miniaturization, large field angle, large aperture, large target surface, low distortion and low sensitivity.

The utility model provides a low-distortion vehicle-mounted optical imaging system and a camera module applying the same, which mainly comprise seven lenses, the first lens has focal power, the second lens has focal power, the object side surface of the second lens is a convex surface, the third lens has negative focal power, the object side surface of the third lens is a concave surface, the image side surface of the third lens is a concave surface, the fourth lens has positive focal power, and the fifth lens has negative focal power. The fifth lens has positive focal power, the object side face of the fifth lens is a convex face, the sixth lens has focal power, the seventh lens has negative focal power, through reasonable matching of the lens shapes and the focal power, the advantages of low distortion, high pixel and high resolution design are achieved, the temperature characteristic is excellent, and the image resolution ratio is high. The object identification capability of the optical system is further improved, and the design requirements of low distortion and high resolution of the optical system are effectively met.

The utility model discloses a deformable lens, which comprises a first spherical lens group, a second spherical lens group, a first cylindrical lens group, a third spherical lens group, a second cylindrical lens group, a fourth spherical lens group and a twentieth lens which are sequentially arranged from an object space to an image space, the focal lengths of all the lens groups meet the following conditions: 1.4 lt; f (G1-G7) Y / f (G1-G7) Xlt; 1.6); 1lt; 1lt; f (G2) X / f (G1-G4) Xlt; -0.7,-0.7; -2lt;-2lt; f (G3) X / f (G1-G4) Xlt; -1.3,-1.3; 361t; 361t; f (G5) Y / f (G5-G7) Ylt; 24); 0.8 lt; f (G1-G4) X / f (G5-G7) Xlt; 1.2; 1.1 lt; 1.1 lt; f (G1-G4) Y / f (G5-G7) Ylt; and 1.7. The integrated design is adopted, so that the lens is small in size, and meanwhile, the optical performance of high resolution, low respiration, low distortion, 1.5 X high magnification and the like is obtained.

The utility model provides a low-distortion wide-angle high-resolution vehicle-mounted foresight optical system and a camera module applying the same, the system is mainly composed of seven lenses, the first lens has negative focal power, and the image side surface of the first lens is a concave surface; the second lens has negative focal power, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a concave surface; the third lens has positive focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; the fourth lens has positive focal power, the object side surface of the fourth lens is a convex surface, and the image side surface is a convex surface; the fifth lens has focal power; the sixth lens has focal power; through reasonable matching of the lens shape and the focal power, the wide-angle optical system has the advantages of low distortion, wide angle and high resolution, and meanwhile, the wide angle can increase the light incoming amount of the optical system and higher imaging quality.

The invention provides an optical lens, which comprises nine lenses from an object side to an imaging surface along an optical axis: a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power, and the image side surface of the sixth lens is a concave surface; the seventh lens has positive focal power; the eighth lens has positive focal power; and the ninth lens has negative focal power. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the lens has one or more advantages of short focus, miniaturization, large field angle, large aperture, large target surface, low distortion and low sensitivity.

The utility model relates to an optical lens, which sequentially comprises a first lens, a second lens, a third lens and a fourth lens along the optical axis from the object side to the image side, a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power, a seventh lens with negative focal power and an eighth lens with negative focal power are included. The combined effective focal length of the first lens and the second lens is F12, and the Abbe number Vd1 of the first lens and the Abbe number Vd2 of the second lens meet the following relation: F12 / (Vd1-Vd2) is greater than or equal to 1 and less than or equal to 4.85. The optical lens at least has one of the characteristics of large field of view, miniaturization, large target surface, high resolution, low distortion and the like.

The present invention discloses a small surveillance lens with low distortion, large light transmission, large target surface and high resolution, which comprises, in order from the object side to the image side along the optical axis: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, an aperture C, a sixth lens L6, a seventh lens L7, an eighth lens L8 and a ninth lens L9, wherein the second lens L2 and the third lens L3 are closely connected to form a first cemented lens group; the seventh lens L7 and the eighth lens L8 are closely connected to form a second cemented lens group; the first lens L1 to the fifth lens L5 form a front lens group; the sixth lens L6 to the ninth lens L9 form a rear lens group; the surveillance lens satisfies the following condition: 2.2≤FOV / CRA≤4.171, wherein FOV is the maximum field angle of the surveillance lens, and CRA is the chief ray angle of the optical system. The surveillance lens of the present invention has the performance of low distortion, large light transmission, large target surface, high resolution and miniaturization.

The invention discloses a compact waveguide collimation system and application thereof. The compact waveguide collimation system sequentially comprises a first lens group, a diaphragm, a second lens group, a prism equivalent lens, a window protection sheet and an image plane position along an optical axis. The first lens group is combined with the bonding lens through the double-layer positive-focal-power meniscus lens, so that aberration and chromatic aberration are effectively corrected; and the second lens group adopts a negative-focal-power biconcave lens for beam expansion and is combined with a symmetrical-structure lens, so that the aberration correction difficulty is reduced. The system completely adopts spherical mirrors and glass materials, realizes the characteristics of high collimation, high relative illumination, low distortion, compact structure and low cost by optimizing the focal power, the surface type and the relative position, and is suitable for an optical waveguide display system.

The invention provides a compact hyperspectral imager optical system and an imaging method thereof, which are used for solving the technical problems that the overall size of a front telescopic assembly in a traditional hyperspectral imager optical system is difficult to compress, the installation and adjustment difficulty is relatively large, or the incident energy is lost and the space coverage capability is insufficient. And the technical problems of low energy utilization rate and difficulty in improving the sensitivity and the signal-to-noise ratio of the hyperspectral imager of the traditional Dyson type dispersion light splitting assembly are solved. The invention provides a compact hyperspectral imager optical system, which comprises an off-axis two-image-reflection telecentric optical path system based on a free-form surface and a Dyson light splitting system based on a curved surface prism, and realizes high regulation and control capability on light through multiple degrees of freedom of a curved surface shape. Compared with the prior art, the high-spectral imaging device has the advantages that the high-spectral imaging device is simple in structure, high image quality, small distortion and good telecentricity are achieved, meanwhile, the curved prism serves as a dispersion light splitting element, the whole spectrum has high light splitting efficiency, and the signal-to-noise ratio and sensitivity of the high-spectral imaging device can be improved.

The invention discloses a monitoring lens with low distortion, large target surface and high resolution, which sequentially comprises a first lens L1, a second lens L2, a third lens L3, a diaphragm C, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10 and an eleventh lens L11 from an object side to an image side along an optical axis, the second lens L2 and the third lens L3 are closely connected to form a first glued lens group; the fourth lens L4 and the fifth lens L5 are closely connected to form a second glued lens group; the first lens L1 to the third lens L3 form a front group lens; the fourth lens L4 to the eleventh lens L11 constitute a rear group lens. The monitoring lens has the advantages of low distortion, large target surface, high resolution and miniaturization.

The invention provides an imaging optical system for industrial visual inspection, which is characterized in that a first lens is mainly composed of nine lenses and has focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has focal power; the third lens has focal power; the fourth lens has focal power; the fifth lens has positive focal power; the sixth lens has focal power, and the object side surface of the sixth lens is a convex surface; the seventh lens has focal power, and the object side surface of the seventh lens is a concave surface; the eighth lens has focal power; and the ninth lens has positive focal power, the image side surface of the ninth lens is a convex surface, and through the combination design of nine lenses and the reasonable configuration of the refractive power and the surface type of each lens, high-resolution imaging under a compact structure and a large aperture is realized, the aberration correction capability is particularly enhanced, and a relatively high MTF value is ensured in the whole zoom range. Accuracy and reliability of industrial detection are remarkably improved, and the system has the advantages of zooming, low distortion and low cost.

The invention discloses a low-distortion high-resolution miniaturized industrial lens, which sequentially comprises a first lens L1, a second lens L2, a third lens L3, a diaphragm C, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8 and a ninth lens L9 from an object side to an image side along an optical axis, the first lens L1, the second lens L2 and the third lens L3 form a front group lens, and the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8 and the ninth lens L9 form a rear group lens. The industrial lens has the characteristics of miniaturization, low distortion and high resolution.

An information handling system camera provides a 117 degree field of view with low distortion by capturing visual images through a lens having eight lens elements. The first lens element closest to the object, the third lens element and the sixth lens element each have a glass material, the remaining lens elements have a plastic material. The first two lens elements and the last lens element each have a negative refractive power and the remaining lens elements have a positive refractive power. Lens elements two and four through eight each have aspherical surfaces.

The invention discloses an intelligent audio scene adaptation method based on an MEMS loudspeaker, and relates to the technical field of audio scene adaptation. Audio is collected through a microphone array, and features such as frequency domain entropy are fused to construct vectors; a scene is identified by using BiLSTM and a self-attention model, and rapid adaptation is carried out in combination with transfer learning; optimizing loudspeaker parameters based on a coupling model and a genetic algorithm, and compensating temperature influence; the equal-sound curve is dynamically adjusted according to the scene, the audio is enhanced, and cross-scene adaptation, parameter pre-adjustment and multi-loudspeaker collaborative optimization are realized through the technologies of adversarial training, model prediction control and the like. According to the invention, through multi-modal feature fusion and deep learning, the scene recognition accuracy is improved, the loudspeaker parameters are optimized by using the coupling model, and distortion and power consumption are reduced; the audio enhancement parameters are dynamically adjusted, multi-scene adaptation is achieved, the tone quality and the user experience are improved, and the application bottleneck of a traditional MEMS loudspeaker is solved.

The invention discloses a method and a system for optimizing a metering front end of an intelligent electric meter. The method comprises the following steps of: setting an anti-aliasing network with a near-linear phase at the front end of a metering channel and synchronously sampling; determining a range switching window based on zero crossing or a preset voltage change rate, executing automatic range switching in the window, and performing overlapping sampling and digital splicing on samples before and after switching; determining a rectification conduction empty window based on the rectification conduction prediction, suspending sampling in the empty window, and compensating a missing sample; injecting a reference signal into the channel at the calibration injection window, obtaining a correction coefficient according to response, and performing online correction; the three types of windows are not overlapped and are uniformly scheduled by a synchronous time sequence; and completing power and energy calculation according to the corrected voltage and current sequence. The system comprises an anti-aliasing network unit, a range control unit, a rectification conduction detection unit, an air window door control unit, an injection and online correction unit, a time sequence synchronization unit, a metering calculation unit and the like. According to the invention, low-distortion, wide-range and consistent metering output can be realized in practical application.

The invention relates to a refractive and super hybrid visible light pick-up lens and electronic equipment, and belongs to the field of optical lenses, the refractive and super hybrid visible light pick-up lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged from an object plane to an image plane along an optical axis, and the other lenses are aspheric lenses. According to the invention, the large aperture and low distortion are realized through the eight-piece design, the total optical length is effectively compressed, the system is more miniaturized, lighter and thinner, and the surface type complexity of the aspherical lenses is reduced.

The invention relates to a 12M large-wide-angle security monitoring lens which sequentially comprises a diaphragm and first to ninth lenses from an object side to an image side, the first and second lenses have negative diopters, the third, fourth, sixth to ninth lenses have positive diopters, and the fifth lens has negative diopter. The aspheric lens is matched to correct aberration and suppress distortion. The working wave band of the lens covers 435-1000 nm, the F number is about 1.3, the maximum imaging circle diameter is about 16.8 mm, the TTL does not exceed about 22 mm, the relative illumination can reach about 39%, the main light angle is about 23 degrees, the lens is adaptive to a 12M large-size sensor, full-view-field high resolution, low distortion and clear imaging under weak light / infrared supplementary light are achieved, and the lens is suitable for security and protection monitoring equipment.

The invention discloses a miniaturized large-target-surface low-distortion aerial photographing lens and module. The aerial photographing lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a diaphragm, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens, a thirteenth lens, a fourteenth lens and a fifteenth lens which are sequentially arranged from the object side to the image side along the optical axis. Through reasonable lens structure design and curvature radius control, excellent low distortion performance is realized, and the geometric accuracy of an image is ensured. The design of fifteen lenses is adopted, sufficient design freedom is provided, various aberrations such as spherical aberration are effectively corrected, high resolution is achieved, and a large-target-surface photosensitive element is matched; through focal power distribution and aberration correction, the imaging effect of an edge field of view is remarkably improved, and the definition consistency of the center and the edge of a picture is ensured.

The embodiment of the invention discloses a projection image distortion correction method and device and a computer storage medium, and is used for solving the technical problem of low distortion correction precision in the prior art. The distortion correction method for the projection image can comprise the following steps: determining the number of offset sub-pixels of the projection image according to a projected image; adjusting the display position of the projected image on the display panel according to the number of the offset sub-pixels to obtain an initial corrected image; and according to the pixel information of the projected image, performing sub-pixel sequence rearrangement on the pixel units in the initial correction image to obtain a target correction image, so that the target correction image and the projected image have the same display color. The distortion correction precision of a projected image can be improved.

The invention discloses a low-distortion low-chromatic-aberration industrial optical lens, which sequentially comprises a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a diaphragm C, a ninth lens L9, a tenth lens L10, an eleventh lens L11 and a twelfth lens L12 from an object side to an image side along an optical axis, the first lens L1 to the seventh lens L7 form a front group lens; the eighth lens L8 to the twelfth lens L12 form a rear group lens; the fifth lens L5 and the sixth lens L6 are tightly connected to form a first gluing group; and the tenth lens L10 and the eleventh lens L11 are closely connected to form a second gluing group. The industrial optical lens has the advantages of low distortion, wide imaging range and high image definition.

The invention discloses a micro single lens. The micro single lens 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 which are sequentially arranged from an object plane to an image plane along an optical axis; the first lens has positive focal power, the fifth lens has negative focal power, the eighth lens has positive focal power, and the ninth lens has negative focal power; the refractive index of the first lens is Nd1, and Nd1 is larger than 1.9. By reasonably designing the relative position and the focal power of the lens, the micro single lens is ensured to meet the imaging requirements of high image quality and low distortion under the conditions of small size and low cost.

The present invention relates to a large-aperture and large-image-surface space debris monitoring optical system. The optical system is provided with a front fixed group A with negative optical power, an aperture, and a rear fixed group B with positive optical power in sequence along the incident light path. The front fixed group A is composed of a meniscus positive lens A1, a first cemented group formed by closely bonding a biconvex positive lens A2 and a biconcave negative lens A3, and a second cemented group formed by closely bonding a meniscus positive lens A4 and a meniscus negative lens A5. The rear fixed group B is composed of a biconvex positive lens B1, a biconcave negative lens B2 and a biconvex positive lens B1. The optical system consists of a third cemented group formed by closely bonding lenses B3, a biconvex positive lens B4, a fourth cemented group formed by closely bonding biconvex positive lens B5 and biconcave negative lens B6, a meniscus positive lens B7, a meniscus negative lens B8 and flat glass B9; the optical system has high resolution, low distortion, small chromatic aberration, strong monitoring capability, large aperture and large image surface, which are conducive to enhancing the energy entering the optical system, monitoring smaller space debris, and increasing the monitoring range of space debris; a weight-reduction design is adopted to effectively control the weight of the lenses, which is conducive to the carrying of aircraft.

The invention discloses a small low-distortion vehicle-mounted lens, and belongs to the technical field of optical lenses. Comprising a first lens with positive focal power, a second lens with positive focal power, a diaphragm, a third lens with negative focal power, a fourth lens with positive focal power, a fifth lens with positive focal power and a sixth lens with positive focal power which are sequentially arranged from an object plane to an image plane along an optical axis, and the following conditions are met: 0.3 lt; f / TTLlt; 0.4, 4.95 < = TTL / D < = 5.55; wherein f is the focal length of the small low-distortion vehicle-mounted lens, TTL is the total length of the small low-distortion vehicle-mounted lens, D is the entrance pupil diameter, and the unit is mm. The vehicle-mounted lens has the advantages of small size, low distortion, large aperture, high imaging quality and low cost, and is good in working stability in high and low temperature environments.

The present invention provides a low-distortion vehicle-mounted forward-looking optical system and a camera module used therein. The optical system is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens in sequence along the optical axis from the object plane to the image plane. By rationally allocating the surface shape and optical focal length of each lens and using a hybrid optical system of spherical and aspherical surfaces, the optical system's recognition of distant objects in front is improved, while taking into account the advantages of low distortion, high-definition resolution, excellent temperature characteristics, and ultra-high pixels. Therefore, the system has great potential in the field of vehicle-mounted forward-looking vision.

This speaker system provides high-quality sound reproduction through a novel configuration that suppresses the air spring effect. [Solution] The speaker device of the present invention comprises a housing 1 having a baffle plate 2 on which a speaker unit 3 that vibrates in response to an input electrical signal and outputs sound waves is mounted, and an opening 4 is provided on the bottom surface. A predetermined amount of granular material 6, placed parallel to the opening end 5, closes the opening 4 of the housing 1. Granular material 6 is interposed in the path from the internal space to the external space of the enclosure 1, creating a structure in which the air inside the enclosure 1 is acoustically connected to the outside atmosphere via the granular material 6. This configuration suppresses the air spring effect, making it possible to provide a speaker device that achieves high-quality sound reproduction with low distortion.

This invention discloses a high-definition lens, comprising a first lens, a first cemented lens group, an aperture stop, a fourth lens, and a fifth lens arranged sequentially from the object plane to the image plane; wherein the first lens and the fourth lens have negative optical power; the first cemented lens group and the fifth lens have positive optical power, and the fifth lens has a biconvex structure; the focal length of the lens is f, and the focal length of the first cemented lens group is f. U1 f U1 The following relationship exists between f and f: 0.35 < |f U1 / f|<0.90. The lens formed by this invention is not only compact and economical, but also ensures high imaging resolution, small aperture and low distortion, which can meet the needs of industrial applications and has great market prospects and economic value.