8results about How to "Large target area" patented technology

The invention relates to a light and miniature big-target-surface low-light lens, and the lens comprises a front lens group A, a diaphragm B and a rear lens group C, wherein the front lens group A, the diaphragm B and the rear lens group C are sequentially arranged in an incident direction of an optical path. The front lens group A includes a positive meniscus lens A1, a negative meniscus lens A2,a biconcave lens A3 and a biconvex lens A4, wherein the positive meniscus lens A1, the negative meniscus lens A2, the biconcave lens A3 and the biconvex lens A4 are sequentially arranged in an incident direction of the optical path. The biconcave lens A3 and the biconvex lens A4 are in close connection with each other as a first bonding group. The rear lens group C includes a biconcave lens C1, abiconvex lens C2, a biconvex lens C3, a plano-convex lens C4 and a negative meniscus lens C5, wherein the biconcave lens C1, the biconvex lens C2, the biconvex lens C3, the plano-convex lens C4 and the negative meniscus lens C5 are sequentially arranged in an incident direction of the optical path. The biconcave lens C1 and the biconvex lens C2 are in close connection with each other as a secondbonding group. The invention also relates to an imaging method of the lens. The lens is reasonable in design, effectively improves the imaging quality under the requirement of the large target surfaceof the lens, reduces the number of optical lenses, and realizes light and miniature lens. The lens has strong light collecting and light transmitting ability, and the target surface of the lens is large. The lens is high in optical resolution, is large in angle of view, and is large in observable range.

This invention discloses a method and system for instrument reading recognition based on image segmentation, comprising: acquiring an instrument image to be recognized; extracting mask information of the pointer region, the center region of the dial, and a predetermined triangular region from the instrument image using a trained semantic segmentation model; wherein the predetermined triangular region is the triangular region formed by the first and last scale values ​​of the dial and the center region of the dial; separating the pointer region, the center region of the dial, and the predetermined triangular region into three independent channels based on the mask information of each region, and performing rotation correction on the instrument position in the instrument image; performing triangle fitting on the predetermined triangular region, selecting key points in the center region of the dial, the pointer region, and the fitted predetermined triangular region, and calculating the instrument reading based on the key points. The segmentation method of this invention has higher annotation efficiency and fewer, larger, labeled target regions, resulting in an overall improvement in algorithm performance.

This invention discloses an adaptive differential evolution algorithm for optimizing passive radar station deployment, comprising the following steps: establishing a passive time difference station deployment simulation scenario; step 2: population initialization; step 3: fitness value calculation; step 4: genetic operation. On the one hand, this invention addresses the problem of numerous variable parameters and complex parameter settings in particle swarm optimization (PSO) algorithms by incorporating iteration counts, fitness values, and weights into parameter generation, making the algorithm's search and convergence more reasonable. On the other hand, this invention considers the impact of station location error, time difference error, and communication distance between observation stations on the deployment results during experimental simulation, making the modeling process more realistic.

The present application relates to a kind of ITS intelligent traffic lens, the front lens group A is sequentially arranged from left to right by positive lens A-1, meniscus negative lens A-2, meniscus positive lens A-3, meniscus negative lens A-4 along the light path of light incidence, wherein meniscus negative lens A-2 and meniscus positive lens A-3 constitute double cemented lens;The rear lens group B is sequentially arranged from left to right by double concave negative lens B-1, double convex positive lens B-2, double convex positive lens B-3, double convex positive lens B-4, double convex positive lens B-5, double concave negative lens B-6, double convex positive lens B-7, negative lens B-8 along the light path of light incidence, wherein double concave negative lens B-1 and double convex positive lens B-2, double convex positive lens B-5 and double concave negative lens B-6, double convex positive lens B-7 and negative lens B-8 respectively constitute double cemented lens;12 pieces of glass spherical lens are used, and the parameters such as the shape, thickness and air gap of each lens are optimized, to meet the optical performance such as large target surface, large optical aperture and high resolution, while meeting the requirements of day and night confocal, high and low temperature stability.

This invention provides an all-glass vehicle-mounted day and night confocal optical system and its application camera module, mainly composed of 8 lenses. The first lens has negative optical power, a convex object side, and a concave image side; the second lens has negative optical power, a concave object side, and a convex image side; the third lens has positive optical power, a convex object side, and a concave image side; the fourth lens has negative optical power, a convex object side, and a concave image side; the fifth lens has positive optical power, a convex object side, and a convex image side; the fourth and fifth lenses form a bonded lens; the sixth lens has positive optical power, a convex object side, and a convex image side; the seventh lens has negative optical power and a concave image side; and the eighth lens has optical power and a concave image side. The structure is simple and has advantages such as high resolution, large target area, small size, high relative illumination, and high pixel imaging, improving the uniformity of image illumination and image clarity.

The invention provides an ultra-wide-angle small automatic focusing lens and an image pickup device. The lens sequentially comprises a first lens group, an aperture diaphragm, a second lens group with positive focal power and a third lens group with positive focal power from an object side to an image side, in the focusing process, the second lens group moves from the image side to the object side along the optical axis; the lens satisfies the following conditional expressions: 1.5 < F2 / F < 3.5; 8 < F3 / F < 12; f / L is more than 0.05 and less than 0.3; f / H is more than 0.8 and less than 1.5. In the focusing process, only the second lens group moves along the optical axis, the positions of the first lens group and the third lens group are kept unchanged, the focusing mechanism can be simplified, miniaturization is facilitated, and meanwhile the focusing speed and precision can be improved. Furthermore, the aperture diaphragm is arranged on the side relatively close to the object, so that the design effect of considering both miniaturization and ultra-wide angle can be realized; the lens has a large target surface and can be matched with a half-frame camera.

The wide-angle 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, in the direction from the object plane to the image plane, the first lens is a convex-concave lens and has negative focal power; the second lens is a convex-concave lens and has negative focal power; the third lens has positive focal power; the fourth lens is a biconvex lens and has positive focal power; or the fourth lens is a concave-convex lens and has negative focal power; the fifth lens is a biconvex lens and has positive focal power; the sixth lens is a biconcave lens and has negative focal power; the seventh lens is a biconvex lens and has positive focal power; the eighth lens is a paraxial region convex-concave lens and an off-axial region concave-convex lens, and has negative focal power; the sixth lens and the seventh lens form a balsaming lens. The wide-angle lens has the advantages of large aperture, large target surface, low chromatic aberration, low distortion, high image quality and the like.

The utility model discloses an optical lens relates to lens technical field. Optical lens includes the first lens with negative optical power, the second lens with negative optical power, the third lens with positive optical power, the fourth lens with positive optical power, the fifth lens with negative optical power, the sixth lens with positive optical power, the seventh lens with negative optical power and the eighth lens with positive optical power that have negative optical power in order along the optical axis from object side to image side. Adopt above-mentioned technical scheme, the optical power of each lens, position can be allocated reasonably, can realize the design of infrared confocal optical lens of big light -passing, big target surface, small volume, high image quality, can realize the aperture for 1.28 finally, and the total length of optics is not more than 22.5mm, and the imaging target surface can match the optical lens of 1 / 1.8 inch chip, satisfies the demand of definition imaging under extremely dark environment, can also satisfy the higher use demand in the field of security monitoring.