22results about How to "Large target area" patented technology

The invention discloses a zoom lens, which comprises a first lens group with positive focal power, a second lens group with negative focal power, a third lens group with positive focal power, a fourth lens group with positive focal power and a fifth lens group with focal power, and is characterized in that the first lens group, the third lens group and the fifth lens group are fixed groups; the first lens group comprises a first lens, a second lens and a third lens; the second lens group comprises a fourth lens, a fifth lens, a sixth lens and a seventh lens; the third lens group comprises an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens and a thirteenth lens; the fourth lens group comprises a fourteenth lens, a fifteenth lens and a sixteenth lens; the fifth lens group comprises a seventeenth lens; the second lens group moves between the object side and the image side to realize continuous zooming between a wide-angle end and a telephoto end; and the fourth lens group moves between the object side and the image side so as to realize the compensation of the image surface position change in the zooming process.

The utility model discloses an optical lens. The utility model relates to a zoom lens, which sequentially comprises 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 negative focal power, a fifth lens with negative focal power, a sixth lens with positive focal power and a seventh lens with negative focal power from an object side to an image side along an optical axis, the first lens has positive focal power, the eighth lens has positive focal power, the ninth lens has positive focal power, the tenth lens has negative focal power, and the eleventh lens has positive focal power.

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.

The zoom lens comprises a first fixed lens group, a first zoom lens group, a second zoom lens group, a focusing lens group and a second fixed lens group which are sequentially arranged from an object plane to an image plane along an optical axis, the first fixed lens group has positive focal power, the first zoom lens group has negative focal power, the second zoom lens group has positive focal power, the focusing lens group has positive focal power, and the second fixed lens group has negative focal power. According to the zoom lens provided by the embodiment of the invention, a five-component structure is adopted, 14 lenses are used, the number of the lenses in each lens group is set, and the focal power matching of each lens group and each lens is further limited, so that the zoom lens with large target surface, large multiplying power, large aperture, small distortion and small size is realized; and wider use requirements can be met.

The invention discloses a zoom lens, which belongs to the technical field of optics and consists of an image surface positioned on an image side, and a front fixed group A with positive focal power, a zoom group B with negative focal power, a middle fixed group C with positive focal power and a compensation group D with positive focal power which are sequentially arranged from an object side to the image side, the lens is composed of a negative meniscus lens A1, a positive meniscus lens A2, a biconvex lens A3, a positive meniscus lens A4, a negative meniscus lens B1, a biconcave lens B2, a biconvex lens B3, a biconcave lens B4, a diaphragm, a biconvex lens C1, a negative meniscus lens C2, a positive meniscus lens C3, a biconvex lens C4, a negative meniscus lens C5, a biconvex lens D1, a positive meniscus lens D2, a biconvex lens D3 and a biconcave lens D4 which are sequentially arranged from the object side to the image side. And the imaging quality is high, and good image quality can be obtained.

The invention provides a double-color composite uncooled athermalization infrared lens, the applicable spectral ranges are 3-5 [mu] m and 8-12 [mu] m, and the lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged in the optical axis transmission direction; the first lens and the fourth lens are meniscus positive lenses with convex surfaces facing the object side; the second lens, the third lens and the fifth lens are meniscus negative lenses with convex surfaces facing the object side; the air gap between the first lens and the second lens is 0.5 mm, the air gap between the second lens and the third lens is 18.2 mm, the air gap between the third lens and the fourth lens is 31.89 mm, and the air gap between the fourth lens and the fifth lens is 0.5 mm. The lens provided by the invention is simple in structure, large in target surface and clear in imaging, is adaptive to a double-color movement, and can be matched with an uncooled detector with the resolution of 1280 * 1024 and 12 [mu] m for use. The invention further discloses an imaging device.

The invention discloses a high-resolution fixed-focus lens and a camera, wherein the high-resolution fixed-focus lens comprises a mechanical device and an optical system installed inside the mechanical device, wherein the optical system is provided with a front lens group, a middle lens group, an aperture and a rear focusing group in sequence from the image side to the object side; the front lens group comprises a first lens with positive focal power, a second lens with negative focal power and a third lens with negative focal power; the middle lens group comprises a fourth lens with positive focal power and a fifth lens with positive focal power; the rear focusing group comprises a sixth lens with positive focal power, a seventh lens with negative focal power, an eighth lens with positive focal power, a ninth lens with positive focal power, a tenth lens with negative focal power and an eleventh lens with positive focal power; the high-resolution fixed-focus lens of the invention is advantageous for matching a camera with a larger target surface and a higher resolution.

The invention discloses a large-target-surface industrial lens and an industrial lens module, and belongs to the technical field of optical imaging, and the large-target-surface industrial lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side along an optical axis, the second lens has positive focal power; the third lens has positive focal power; the fourth lens has negative focal power; the fifth lens has positive focal power; the sixth lens has negative focal power; the large-target-surface industrial lens satisfies the following conditional expressions: ImgH / (SAG11-SAG12) is greater than or equal to-12.001 and less than or equal to-5.309; tTL / EPD is greater than or equal to 3.934 and less than or equal to 5.367. According to the combined configuration of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens, the illumination of the large-target-surface industrial lens is better improved, so that the large-aperture and large-target-surface requirements of the large-target-surface industrial lens are favorably realized, and the imaging quality of the large-target-surface industrial lens is also favorably improved.

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.

The invention discloses a zoom lens, belonging to the field of optical technology. The zoom lens comprises an image plane located at the image side and a front fixed group A with positive focal power, a variable magnification group B with negative focal power, an intermediate fixed group C with positive focal power, and a compensation group D with positive focal power, which are arranged in sequence from the object side to the image side. The lenses comprise a negative meniscus lens A1, a positive meniscus lens A2, a biconvex lens A3, a positive meniscus lens A4, a negative meniscus lens B1, a biconcave mirror B2, a biconvex lens B3, a biconcave mirror B4, an aperture, a biconvex lens C1, a negative meniscus lens C2, a positive meniscus lens C3, a biconvex lens C4, a negative meniscus lens C5, a biconvex lens D1, a positive meniscus lens D2, a biconvex lens D3, and a biconcave mirror D4, which are arranged in sequence from the object side to the image side. The zoom lens has the advantages of high lens resolution, high imaging quality, and good image quality.

The invention provides a high-pixel small-size panoramic fisheye optical system and a camera module applying the same, the high-pixel small-size panoramic fisheye optical system is mainly composed of eight lenses, through reasonable matching of lens shapes and focal power, the design requirements of an ultra-wide angle and high resolution of the optical system are effectively met, and the high-pixel small-size panoramic fisheye optical system has the advantages of high pixel, large target surface, ultra-wide angle and small size, and is compact in structure and convenient to use. Processing and installation are facilitated, and the imaging effect of equipment matched with the system is further improved.

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 present invention discloses a high-pixel panoramic optical system and a camera module, wherein the optical system comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens which are sequentially distributed along the optical axis from the object plane to the imaging plane, wherein the object plane side of the first lens is convex, and the image plane side is concave; the object plane side of the second lens is convex, and the image plane side is concave; the object plane side of the third lens is convex, and the image plane side is concave; one of the object plane side and the image plane side of the fourth lens is convex, and the other is convex or flat; the object plane side of the fifth lens is convex or flat, and the image plane side is convex, or the object plane side is convex, and the image plane side is concave; the object plane side of the sixth lens is concave or convex, and the image plane side is concave; the object plane side of the seventh lens is convex, and the image plane side is concave. Based on a reasonable optical configuration, the present invention adopts a combination of seven lenses and a reflective element to realize an optical system and a camera module with high pixels, a large target surface, and a small volume.

The invention discloses an F-mount large-target-surface continuous zoom lens, wherein the continuous zoom lens is provided with a front fixed group A with negative focal power, a zoom group B with positive focal power, an aperture stop C, a compensation group D with positive focal power, and a rear fixed group E with negative focal power in sequence from the object plane to the image plane; the front fixed group A comprises a first cemented group in which a biconvex lens A1 and a biconcave lens A2 are closely connected; the zoom group B comprises a second cemented group in which a biconcave lens B1 and a biconvex lens B2 are closely connected, and a third cemented group in which a biconvex lens B3 and a negative meniscus lens B4 are closely connected; the compensation group D comprises a fourth cemented group in which a negative meniscus lens D1 and a biconvex lens D2 are closely connected; and the rear fixed group E comprises a fifth cemented group in which a plano-concave lens E1, a biconvex lens E2, and a biconcave lens E3 are closely connected. The F-mount large-target-surface continuous zoom lens provided by the invention can be used in conjunction with image sensors of 1.75 inches or less.

The present invention discloses a machine vision lens with a large target surface and a large viewing angle, comprising a first lens group G1, a second lens group G2 and a third lens group G3 with positive optical power arranged in sequence from the object surface to the image surface. When focusing, the first lens group G1 and the third lens group G3 are fixed relative to the image surface, and the second lens group G2 moves along the optical axis. The lens can achieve high-quality imaging in a wide working distance range by reasonably controlling the focal length ratio, lens shape and optical power of each lens group, with small distortion and high resolution, and has a large target surface, a large viewing angle, and high pixel performance, and is easy to achieve small and light weight of the lens.

The invention discloses a high-definition industrial lens with a large target surface and a wide working distance, comprising a first lens group G1 with a negative optical power and a second lens group G2 with a positive optical power arranged in sequence from the object plane to the image plane. When focusing, the first lens group G1 is fixed relative to the image plane, and the second lens group G2 moves along the optical axis; the high-definition industrial lens with a large target surface and a wide working distance also meets the following conditions: 2.0≤|F1 / F2|≤6.0, ‑0.3≤f / F1≤0.1, wherein F1 is the focal length of the first lens group G1, F2 is the focal length of the second lens group G2, and f is the focal length of the optical system. The application meets the requirements of a large target surface with high pixels, a wide working distance range, good and stable analytical performance, small optical system distortion, and high imaging quality.

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 present invention discloses a zoom lens, comprising a first fixed lens group, a first zoom lens group, a second zoom lens group, a focus lens group and a second fixed lens group arranged in sequence from an object plane to an image plane along an optical axis; the first fixed lens group has a positive focal length, the first zoom lens group has a negative focal length, the second zoom lens group has a positive focal length, the focus lens group has a positive focal length, and the second fixed lens group has a negative focal length. The zoom lens provided by an embodiment of the present invention adopts a five-element structure and uses 14 lenses. By setting the number of lenses in each lens group and further limiting the collocation of the focal lengths of each lens group and each lens, a zoom lens with a large target surface, a large magnification, a large aperture, a small distortion and a small volume is realized, which can meet a wider range of usage requirements.

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.