427 results about "Ultra wide field" patented technology

The invention belongs to the technical field of fundus imaging, and discloses an ultra-wide-angle ellipsoid confocal laser scanning fundus imaging system, which comprises a light splitting module, a light condensing module, a scanning module, a transmitting mirror group, an ellipsoid reflector and a detection module, wherein the center of the scanning module and the center of the transmitting mirror group are located on the same optical axis A, the pupil of the human eye is located at the first focus of the ellipsoidal reflector, and the entrance pupil of the transmitting mirror group is located at the second focus of the ellipsoidal reflector; and the transmitting lens group comprises a movable focusing lens and is used for changing the position of a first image surface of light reflected by the retina of the human eyes when moving along the optical axis A so as to realize clear imaging of the retina of the human eyes with different diopters. Under the condition that a free-form surface is not introduced, ultra-wide-angle multi-wavelength confocal laser scanning fundus imaging with the single intraocular field angle of 200 degrees is achieved, and the full-field optical resolution reaches 15 micrometers. And by moving the focusing lens, imaging compensation can be carried out on human eyes with diopters of-15D to + 15D.

The invention provides an optical lens, which comprises seven lenses in total, and sequentially comprises 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 positive focal power and a fifth lens with negative focal power from an object side to an imaging surface along an optical axis, 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 fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens near the optical axis is a convex surface; and the object side surface of the seventh lens is a concave surface near the optical axis, and the image side surface of the seventh lens is a convex surface. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the imaging quality of the optical lens is improved, and the lens has one or more advantages of ultra wide angle, ultra large aperture, large image plane, high pixel, high imaging quality and the like.

The invention provides an optical imaging device, which comprises a lens group, a spacing element group and a lens barrel, the lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a sixth lens which are sequentially arranged at intervals from the object side to the image side of the optical imaging device, and the half Semi-FOV of the maximum half field angle of the optical imaging device and the numerical aperture fno of the optical imaging device meet the following conditions: 1lt; fno / tan (Semi-FOV) < = 1.25; the effective focal length f of the optical imaging device and the effective focal length f1 of the first lens meet the following formula:-2.3 lt; f1 / flt; -1.2,-1.2; the inner diameter d0s of the object side end face of the lens barrel, the inner diameter d1s of the object side face of the first spacing element and the effective focal length f1 of the first lens meet the following condition:-1.45 < = (d0s-d1s) / f1lt; and-0.85. The problem that in the prior art, an ultra-wide-angle and large-aperture optical imaging device is serious in stray light is solved.

The utility model relates to a low total length 8M foresight optical lens, which is characterized in that an optical system of the lens is composed of a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from left to right along a light incident light path. The lenses are made of plastic and glass materials, the first lens, the second lens, the fourth lens, the fifth lens and the sixth lens are glass spherical lenses, the third lens and the seventh lens are plastic aspheric lenses, and the fifth lens and the sixth lens form a balsaming lens group. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the distance between the lenses on the optical axis and the like, the total length of the lens and the radial size of each lens are reduced while the requirements of a front-view wide-angle camera and a front-view narrow-angle camera are replaced by the low-total-length 8M ultra-wide-angle imaging performance of the lens; and the lens group is miniaturized.

The utility model relates to a foresight ultra-wide-angle binocular camera. An optical system of the camera is composed of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from left to right along a light incident light path. Under the condition that retroflexion caused by aspheric coefficients is not considered, the first lens is a meniscus concave negative lens, the second lens is a meniscus concave positive lens, the third lens is a meniscus convex positive lens, the fourth lens is a biconvex positive lens, the fifth lens is a meniscus concave negative lens, the sixth lens is a meniscus convex positive lens, and all the lenses are made of glass materials. Wherein the first lens and the sixth lens are glass aspheric lenses, and the fourth lens and the fifth lens form a balsaming lens group. While the wide-angle 120-degree clear imaging is realized, the wide-angle 120-degree wide-angle imaging lens has a relatively small appearance size and relatively high environmental stability.

The invention provides an optical lens, which comprises four lenses with focal power and sequentially comprises a first lens with negative 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 and a sixth lens with negative focal power from an object side to an imaging surface along an optical axis, 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 convex surface; the image side surface of the fourth lens is a convex surface; wherein the maximum field angle FOV of the optical lens and the real image height IH corresponding to the maximum field angle of the optical lens meet the following conditions: 35 degrees / mmlt; fOV / IHlt; 46 degrees / mm; the focal length f3 of the third lens and the focal length f4 of the fourth lens satisfy 0.5 lt; f3 / f4lt; and 0.8. 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 an ultra-wide angle, a large aperture, high imaging quality, high collimation and the like.

According to the ultra-wide-angle fundus image analysis method and system, an ultra-wide-angle fundus image is divided into a macular region, a posterior pole region and a peripheral region, the focus of each region is automatically recognized, and then auxiliary diagnosis of various fundus diseases of the whole image is achieved. According to the method and the system, efficient, accurate and automatic fundus disease analysis and evaluation are realized through region partitioning and focus analysis of the ultra-wide-angle fundus image, particularly, the method and the system have remarkable advantages in retina peripheral region lesion detection, and the system can be applied to screening and auxiliary diagnosis of clinical ophthalmic diseases on the basis of a deep learning algorithm model. Along with the rapid development of deep learning, a convolutional neural network (CNN) obtains a significant result in the field of image classification, and the method carries out the partitioning of an ultra-wide-angle fundus image based on a deep learning model, and carries out the analysis and evaluation of common fundus diseases and lesions of the whole image, and optic nerve diseases including the lesions of glaucoma. The invention provides an automatic and accurate fundus image auxiliary diagnosis method.

The utility model relates to an ultra wide angle pick-up lens suitable for a vehicle-mounted OMS system, an optical system of the lens is composed of a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens, the first lens is a meniscus concave negative lens, the second lens is a meniscus concave negative lens, the third lens is a meniscus convex positive lens, the fourth lens is a meniscus convex positive lens, and the seventh lens is a meniscus convex positive lens. The fourth lens is a meniscus concave negative lens, the fifth lens is a biconvex positive lens, the sixth lens is a biconcave negative lens, the seventh lens is a biconvex positive lens, the sixth lens and the seventh lens form a cemented lens group, the first lens and the fifth lens are made of glass materials, and the second lens, the third lens, the fourth lens, the sixth lens and the seventh lens are plastic aspheric lenses. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the axial distance between the lenses and the like, the field angle of the lens is enlarged while the imaging performance requirement of the lens is met, so that the low-cost ultra-wide-angle camera lens suitable for a vehicle-mounted OMS system is realized.

The utility model relates to a lens structure of a double-lens capsule endoscope, which comprises two capsule endoscope lenses with different imaging functions, namely a lens with a narrow-band imaging characteristic and a high-definition ultra-wide-angle lens, the optical system of the first lens comprises a first lens group, a first diaphragm, a second lens group and first protective glass; the first lens group comprises a meniscus negative lens with negative focal power, a convex-concave negative lens with negative focal power and a meniscus lens with positive focal power; the second lens group comprises a biconvex lens with positive focal power and a biconcave lens with negative focal power; the optical system of the second lens comprises a third lens group, a second diaphragm, a fourth lens group and second protective glass; the third lens group comprises a convex-concave positive lens with positive focal power; and the fourth lens group comprises a bonding lens and a convex-concave lens with positive focal power, and the bonding lens is formed by bonding a biconvex lens with positive focal power and a concave-convex lens with negative focal power and has the positive focal power. The lens can enlarge the view field coverage range and improve the detection accuracy.

The utility model relates to an ultra-wide-angle lens, which is arranged along an optical axis in a direction from an object side to an image side. The utility model relates to a multi-lens zoom lens, which sequentially comprises 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 positive focal power, a fifth lens, a sixth lens with positive focal power, a seventh lens with positive focal power, an eighth lens with negative focal power and a ninth lens with positive focal power, the object side surface of the sixth lens is convex; the optical total length TTL, the total focal length f and the image height H under the maximum field angle of the ultra-wide-angle lens meet the following relation: TTL * f / H is more than or equal to 6.9 and less than or equal to 7.4. The ultra-wide-angle lens of the utility model at least has one of the characteristics of large field of view FOV > = 196 DEG optical total length, good thermal stability, high resolution, large aperture (FNO < = 1.8), high illumination and the like.

The utility model provides an ultra-wide-angle prime lens, and relates to the technical field of optical lenses. The ultra-wide-angle prime lens comprises a first lens with negative 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 and a seventh lens with positive focal power which are sequentially arranged from the object space to the image space along the optical axis. The lens further comprises a diaphragm which is located between the third lens and the fourth lens. The ultra-wide-angle prime lens provided by the embodiment of the utility model can realize miniaturization under the condition of a large field angle, can be still adaptive to a large-target-surface chip, can be compatible with more chip types, can be confocal day and night, and can meet the use requirements under more conditions.

The invention provides an optical lens, which comprises eight 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 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 fourth lens is a convex 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 object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; the seventh lens has positive focal power, and the object side surface of the seventh lens is a convex surface; the object side surface of the eighth lens is a concave surface, and the image side surface of the eighth lens is a convex surface. 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 an ultra-wide angle, a large image plane, a large aperture, high imaging quality and the like.

The utility model 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.

The utility model provides a vehicle-mounted lens optical system and an applied camera module thereof, mainly comprising five lenses, the object plane side of the first lens is a convex surface, the image plane side is a concave surface, and the focal power is negative, the object plane side of the second lens is a convex surface or a concave surface, the image plane side is a concave surface, and the focal power is negative, the object plane side and the image plane side of the third lens are convex surfaces, and the object plane side and the image plane side of the third lens are convex surfaces. The object plane side of the fourth lens is a convex surface, the image plane side of the fourth lens is a concave surface, the focal power of the fourth lens is negative, the object plane side and the image plane side of the fifth lens are convex surfaces, the focal power of the fifth lens is positive, the number of the lenses is reasonable, the structure is simple, and the imaging quality of the optical system is improved by reasonably distributing the focal power of the lenses and optimizing the aberration of the lens. The ultra-wide-angle lens has the characteristics of ultra-wide angle, small aperture, large aperture, stable performance at temperature and the like, and has stronger competitiveness in the same type of lenses.

The utility model relates to an ultra-wide-angle high-definition surround-view camera lens, an optical system of the camera lens is composed of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged along a light incident light path, and the fourth lens and the fifth lens form a cemented lens group; under the condition that retroflexion caused by aspheric coefficients is not considered, the first lens is a meniscus concave negative lens, the object side surface is a convex surface, and the image side surface is a concave surface; the second lens is a meniscus concave negative lens, the object side surface is a convex surface, and the image side surface is a concave surface; the third lens is a biconvex positive lens, the object side surface is a convex surface, and the image side surface is a convex surface; the fourth lens is a biconvex positive lens, the object side surface is a convex surface, and the image side surface is a convex surface; the fifth lens is a biconcave negative lens, the object side surface is a concave surface, and the image side surface is a concave surface; the sixth lens is a biconvex positive lens, the object side surface is a convex surface, and the image side surface is a convex surface. The lens is helpful for realizing small-size high-resolution imaging and ultra-wide-angle camera shooting, and the cost is reduced.

The utility model relates to a foresight ultra-wide-angle binocular shooting optical system. The optical system of a lens is composed of a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from left to right along a light incident light path. Under the condition that retroflexion caused by aspheric coefficients is not considered, the first lens is a meniscus concave negative lens, the second lens is a meniscus convex positive lens, the third lens is a biconvex positive lens, the fourth lens is a biconvex positive lens, the fifth lens is a biconvex positive lens, the sixth lens is a meniscus concave negative lens, and all the lenses are made of glass materials. Wherein the first lens and the second lens are glass aspheric lenses, and the fifth lens and the sixth lens form a balsaming lens group. While the wide-angle 120-degree clear imaging is realized, the wide-angle 120-degree wide-angle imaging lens has a relatively small appearance size and relatively high environmental stability.

The utility model discloses a day and night confocal vehicle-mounted optical system and a camera module applying the same, mainly comprising six lenses, the object plane side of the first lens is a convex surface, the image plane side of the first lens is a concave surface, the focal power of the first lens is negative, the object plane side of the second lens is a concave surface, the image plane side of the second lens is a convex surface, the focal power of the second lens is positive, the object plane side of the third lens is a concave surface, the image plane side of the third lens is a convex surface, and the focal power of the third lens is negative. The object plane side and the image plane side of the fourth lens are convex surfaces, the focal power of the fourth lens is positive, the object plane side of the fifth lens is a convex surface, the image plane side of the fifth lens is a concave surface, the focal power of the fifth lens is negative, the object plane side and the image plane side of the sixth lens are convex surfaces, the focal power of the sixth lens is positive, the number of the lenses is reasonable, the structure is simple, and the lens aberration is optimized by reasonably distributing the focal power of the lenses. And the imaging quality of an optical system is improved, so that the optical system has the characteristics of no virtual focus at night, ultra-wide angle, small aperture, large aperture, stable performance at temperature and the like, and has stronger competitiveness in the same type of lenses.

The utility model relates to a low total length 8M foresight main camera. An optical system of the main camera is composed of a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from left to right along a light incident light path. The lenses are made of plastic and glass materials, the first lens, the second lens, the fourth lens, the sixth lens and the seventh lens are glass spherical lenses, the third lens and the fifth lens are plastic aspheric lenses, and the sixth lens and the seventh lens form a balsaming lens group. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the axial distance between the lenses and the like, the total length of the lens and the radial size of each lens are reduced while the requirements of a front-view wide-angle camera and a front-view narrow-angle camera are replaced by the low-total-length 8M ultra-wide-angle imaging performance of the lens, and the miniaturization of the lens group is realized.

The invention provides an optical lens, which comprises eight 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 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 object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a convex surface; and the eighth 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 ultra-wide angle, high pixel, large aperture, small distortion, high imaging quality and the like.

The invention provides an optical lens, which comprises seven lenses, and sequentially comprises 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 from an object side to an imaging surface, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex 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 object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; and the object side surface of the seventh lens is a convex surface. The optical lens provided by the invention has one or more advantages of large target surface, large aperture, ultra-wide angle and the like.

The invention discloses an ultra-wide-angle traffic sign detection method and system based on adaptive dynamic pruning, and belongs to the field of computer vision and target detection, and the method comprises the steps: obtaining to-be-detected ultra-wide-angle traffic sign data, and carrying out the splicing and fusion; inputting the spliced and fused data into the trained traffic sign detection model to obtain a traffic sign detection result; wherein the training of the traffic sign detection model comprises the following steps: constructing an ultra-wide-angle traffic sign data set; a traffic sign detection model is established and comprises a human eye attention concentration position detection module, a detection module based on dynamic pruning and a detection result output module. And training the constructed traffic sign detection model by using the constructed ultra-wide-angle traffic sign data set to obtain a trained traffic sign detection model. According to the method, the image complexity is evaluated in real time, the calculation path of the model is flexibly adjusted, the allocation and use of calculation resources are optimized, and the sensing and processing capability on a large-view-angle target in a complex dynamic scene is improved.

The embodiment of the utility model discloses an ultra-wide-angle and ultra-short-focus full-width camera lens, which comprises sixteen lenses which are sequentially arranged from an object space to an image space along an optical axis, and each lens has corresponding focal power; besides, a diaphragm is arranged between the eighth lens and the ninth lens to divide the sixteen lenses into two lens groups, namely a first lens group with negative total focal power and a second lens group with positive total focal power. According to the full-frame prime lens provided by the embodiment of the utility model, by using the optical structure of the 14 glass spherical lenses and the 2 glass aspherical lenses, when the full field angle is greater than or equal to 132 degrees, the distortion is small, and the purple edge phenomenon is improved. Besides, by adding the aspherical lens, the image quality of an edge field of view is also obviously improved under an ultra-short focal length, clear imaging can be realized, and the shooting feeling of almost zero distortion is achieved.

Embodiments of the present disclosure generally relate to an optical system having a lens system configured to have a wide field of view and high resolution. The optical system includes three or more lens groups with ability to combat optical aberrations and produce a pupil outside of the lens group. The lens system as an image projection system projects a pattern or image rendered on a flat reticle or display of finite distance to the infinity. In an imaging system, the lens system collects light from infinity and forms an image of that object on a sensor.

The invention provides an optical lens, which comprises seven lenses in total, and sequentially comprises a front lens group with negative focal power and a rear lens group with positive focal power from an object side to an imaging surface along an optical axis, the front lens group comprises a first lens with negative focal power, and the image side surface of the first lens is a concave surface; the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the rear lens group comprises a third lens with 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 fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has positive focal power, the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens near the optical axis is a convex surface; and the object side surface of the seventh lens is a concave surface near the optical axis, and the image side surface of the seventh lens is a convex surface. The optical lens provided by the invention has one or more advantages of ultra-wide angle, ultra-large aperture, large image plane, high pixel, high imaging quality and the like.

The invention relates to the technical field of ultra-wide-angle lenses, and discloses an ultra-wide-angle lens optical axis detection calibration method, which comprises the following steps: firstly, selecting a standard wide-angle lens and an image, establishing a camera coordinate system and an image coordinate system, obtaining an image a, obtaining an image b by using a to-be-detected wide-angle lens, comparing the image a with the image b, and calibrating the optical axis of the ultra-wide-angle lens. According to a conversion relation between a camera coordinate system and an image coordinate system, calculating an image edge correction coordinate corresponding to each detection edge point, determining an image correction range of the detection target, establishing a distortion model, according to a preset distortion algorithm of the distortion model, calculating to obtain a distortion coordinate of each image point after distortion, and correcting each distortion point on the distortion coordinate to the image correction coordinate position according to the distortion model, and adjusting lens distortion correction setting or other related parameters of the camera according to an image calibration result. According to the invention, the distortion image is calibrated by setting the coordinate system, so that the calibration of the optical axis is assisted, and the efficiency and the precision are higher.

The invention relates to a small-caliber optical lens, and aims to realize the design targets of high imaging quality, ultra-wide field of view and miniaturization by optimizing parameters such as focal power, curved surface shape, thickness and the like of a lens. The lens is composed of four plastic lenses which are a first lens (P1) with negative focal power, a second lens (P2) with positive focal power, a third lens (P3) with positive focal power and a fourth lens (P4) with positive focal power in sequence from an object side to an imaging surface along an optical axis. The design meets various optical parameter conditions, for example, the focal length ratio (-2 < f1 / f2 <-0.5, 0.2 < f3 / f4 < 1.2), the relation between the effective focal length and the focal length of each lens (for example,-3.004 < f1 / f <-2.554) and the like. In addition, the four lenses are all XY polynomial curved surfaces, and the mechanical structure and the optical performance are optimized. The lens adopts the design of four plastic lenses, is compact in structure, is suitable for miniaturized equipment, can capture more light rays, is suitable for low-light conditions, and can be used for mobile phone cameras, security monitoring equipment and the like.

The invention provides an optical lens, which comprises eight 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 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 positive focal power; the fifth lens has positive focal power; 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, and the object side surface of the seventh lens is a convex surface; the object side surface of the eighth lens is a concave surface, and the image side surface of the eighth lens is a convex surface. 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 an ultra-wide angle, a large image plane, a large aperture, high imaging quality and the like.

The invention provides an optical lens, which comprises eight 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 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 object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a convex surface; and the eighth 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 ultra-wide angle, high pixel, large aperture, small distortion, high imaging quality and the like.

The invention relates to a mobile monitoring and evaluating device for urban light pollution, which comprises a plurality of large-view-field brightness matrix rapid monitoring devices, a data switch and a main control board, and is characterized in that the large-view-field brightness matrix rapid monitoring devices are symmetrically arranged; each large-view-field brightness matrix rapid monitoring device comprises a CMOS monochrome image sensor and an ultra-wide-angle lens with a visual angle of more than 180 degrees which are connected, and the large-view-field brightness matrix rapid monitoring devices meet urban night brightness detection requirements through preset parameter setting. The data switch is connected with the large-view-field brightness matrix rapid monitoring devices, and the main control board receives collected data of the large-view-field brightness matrix rapid monitoring devices through the data switch and evaluates the glare influence of urban night media facade interference light on the road view angle based on the collected data. Compared with the prior art, the method has the advantages of being high in monitoring accuracy, achieving urban scale rapid quantitative evaluation and the like.

The utility model discloses a vehicle-mounted panoramic image system which comprises ultra-wide-angle vehicle-mounted cameras, a vehicle-mounted host and a vehicle-mounted liquid crystal display screen, the ultra-wide-angle vehicle-mounted cameras are arranged at the front end of a vehicle body, the outer side walls of a left rearview mirror and a right rearview mirror and the tail of the vehicle body respectively, and the vehicle-mounted host is arranged in a vehicle. The vehicle-mounted liquid crystal display screen is arranged on a center console of a cockpit, the ultra-wide-angle vehicle-mounted cameras and the vehicle-mounted liquid crystal display screen are in data connection with the vehicle-mounted host, the ultra-wide-angle vehicle-mounted cameras are used for collecting real-time images of the front area, the rear area, the left area and the right area of a vehicle body respectively, and the vehicle-mounted host converts the collected images into distortionless overlook images and sends the images to the vehicle-mounted and a plurality of images are spliced into a 360-degree panoramic aerial view of the vehicle body, and the 360-degree panoramic aerial view of the vehicle body is transmitted to a vehicle-mounted liquid crystal display screen in real time. The technical scheme provided by the utility model has the advantages of clear display, complete and complete auxiliary information and the like, can effectively improve the driving safety of the vehicle, and is strong in practicability.