226 results about "Ultra wide field" patented technology

A system for capturing super wide-angle panoramic images. In particular, a two-reflector system is disclosed which is substantially self-correcting in which optical aberrations are substantially eliminated, such as field curvature, astigmatism and the like. Moreover, the super wide-angle panoramic imaging apparatus of the invention captures a super-wide field of view from a substantially single reference viewpoint. The invention provides a substantially compact viewpoint, while also having a substantially flat and stigmatic image plane, in the context of a super wide-angle panoramic system. Devices and methods for capturing panoramic images of super wide-angle scenes are provided. In a particular embodiment of the invention, two reflectors are provided (e.g., one a hyperboloidal mirror, the other a concave ellipsoidal or spherical mirror), a relay system (e.g., optics such as a mirror, a lens, a pinhole and the like) and an image sensor (e.g., an electronic photo-sensor, a film and the like).

The invention provides an embedded panoramic display device and method served for automobile safe driving. The embedded panoramic display device comprises an ultra-wide field camera, a video collecting card, a panoramic display CPU (central processing unit), a memory and a display; analogue signals collected by the ultra-wide field camera are converted into digital signals through the video collecting card; the digital signals are transmitted to an image processing module consisting of the panoramic display CPU and the memory to carry out image correction; and a corrected image and an automobile top view are spliced in an image processing module, and are output on the display. With the adoption of the embedded panoramic display device and method, provided by the invention, scenes around an automobile body are directly displayed through a display screen; when an automobile normally drives, panoramic assistance is provided for a driver driving under a crowded road condition; and meanwhile, a multi-vision video switching function is provided, more abundant and clear images in a dead area can be provided for a condition that the automobile drives from a ring road to a main road in an inclined manner or special road conditions, and the effective scheme of solving the potential safety hazards because the vision range of the driver is limited can be provided.

The present invention relates to a system and method for capturing video of a real-world scene over a field of view that may exceed the field of view of a user, manipulating the captured video, and then stereoscopically displaying the manipulated image to the user in a head mounted display to create a virtual environment having length, width, and depth in the image. By capturing and manipulating video for a field of view that exceeds the field of view of the user, the system and method can quickly respond to movement by the user to update the display allowing the user to look and pan around, i.e., navigate, inside the three-dimensional virtual environment.

The invention discloses a wide-angle lens, which comprises a first lens having a negative focal power and provided with a concave image-side surface; second lens having a positive focal power; a third lens having a positive focal power and provided with a convex object-side surface; a fourth lens having a negative focal power; a fifth lens having a positive focal power and provided with a convex image-side surface; and a sixth lens having a negative focal power and provided with a concave image-side surface near the optical axis thereof. The first lens, the second lens, the third lens, the lens, the fourth lens, the fifth lens and the sixth lens are sequentially arranged from the object side to the image side. The wide-angle lens satisfies the following condition of 1.0 <= f2 / f <= 2.0, 0.5 <= f1 / f 4 <=1.5, wherein f1 represents the effective focal length of the first lens; f2 represents the effective focal length of the second lens; f4 represents the effective focal length of the fourth lens; and f represents the effective focal length of the wide-angle lens. According to the technical scheme of the invention, the wide-angle lens has the advantages of ultra-wide field, high definition, small size, improved assembling process, low cost and the like.

A system and method for obtaining images having an ultra- wide field of view angle. A panoramic camera includes two subsystems: an optical subsystem and an image sensor. The optical subsystem includes at least a three-aspheric mirrors for producing an image of objects in the ultra-wide field of view. The produced images are correctable by a standard optical element to produce on an image plane an image having an optical resolution approximately equal or exceeding the Nyquist sampling criterion for the image sensor. A first mirror provides a sharp, compressed, virtual image using a convex paraboloidal or hyperboloidal mirror. Second and third mirrors redirect light onto the correction element through a folded optical path. The standard optical element projects a virtual image onto the image sensor. Image processing software can be used to decompress and unwrap the ultra-wide angle image captured by the image sensor.

The invention discloses a medical endoscope ultra-wide field type pick-up lens, which sequentially comprises a first lens stop and a second lens from an object side to an image side, wherein two faces of the first lens stop bulge toward the object side, focal power of the first lens stop is negative, and the first lens stop is in a crescent shape; two faces of the second lens bulge, and focal power of the second lens stop is positive; the first lens stop and the second lens meet the following conditions: (1)4<T / f<6, wherein T is the distance from a surface peak of a first lens near the object space to an imaging face; and f is focal length of the medical endoscope ultra-wide field type pick-up lens. The medical endoscope ultra-wide field type pick-up lens provided by the invention has the advantages of great field angle, miniaturization, low cost and high resolution, can obtain good imaging quality under the field angle at about 120 degrees, has nearest imaging distance at 2.8mm and meets requirements of great field angle, miniaturization and high resolution of the medical endoscope. In addition, both the first lens and the second lens are made of the sameplastic, so that the manufacturing process is simplified, the cost is reduced, and thus the medical endoscope ultra-wide field type pick-up lens is suitable for mass production.

The invention relates to an ultra-wide field angle and large aperture fish-eye lens optical system, and the system sequentially comprises a front optical system with the negative focal power and a rear optical system with the positive focal power from the object side to the image side along an optical axis. The front optical system sequentially includes a first lens of negative power, a second lens of negative power and a third lens of negative power from the object side to the image side in the direction of the optical axis. The rear optical system sequentially includes a fourth lens of negative power, a fifth lens of positive power, a sixth lens of negative power, a seventh lens of the positive power, an eighth lens of the negative power, an aperture diaphragm, a ninth lens of the positive power, a tenth lens of the negative power, an eleventh of the negative power, a twelfth lens of the positive power and a filter from the object side to the image side in the direction of the optical axis. The system provided by the invention is good in image plane uniformity, is high in imaging quality, is large in view field angle, is large in receiving aperture, is compact in structure, and is easy to process and install.

The invention relates to a staring infrared imaging forest-fire prevention alarming system with a wide field of view. The system comprises an infrared imaging optical lens and an infrared refrigeration detector. Light rays are imaged on a focal plane array of the infrared refrigeration detector through the infrared imaging optical lens. The infrared imaging optical lens adopts a retrofocus structure. The imaging position of the infrared imaging optical lens and the spatial orientation information of an object form the object-image relationship of y'=fTheta, wherein y' is the image height of an image of the object on the focal plane array of the infrared refrigeration detector, f is the focal length of the infrared imaging optical lens, and Theta is an angle of field of view. The system adopts staring imaging, and a mechanical scanning structure is eliminated, so that the stability of the system is enhanced; and the system has the ultra-wide field of view of 180 degrees, and can realize the real-time imaging of all peripheral zones without any dead zone, so that the condition of false alarm can be effectively prevented, and a plurality of fire points can be discovered and monitoredat the same time.

The present invention relates to an ultra-wide field small distortion vehicle lens optical system. The optical system comprises a first lens L1 having negative power, a second lend L2 having negative power, a third lens L3 having negative power, a fourth lens having positive power, a fifth lens L5 having positive power and an infrared cutoff filter L6 which are arranged from an object to be shot to an image plane in order, and the object to be shot can realize clear imaging at the image plane through integrally moving the lens at different distances. The first lens, the fourth lens and the fifth lens are glass aspherical lenses, and others are glass lenses. The optical system is big in the angle of visual field and small in distortion and size, has no TV distortion, and has no temperature drift defocusing phenomenon in the temperature range from 20-85 DEG c.

The embodiment of the invention discloses a prime lens. The prime lens includes a first lens with negative light focal power, a second lens with negative light focal power, a third lens with positivelight focal power, a diaphragm, a fourth lens with negative light focal power, a fifth lens with positive light focal power, a sixth lens with positive light focal power, a seventh lens with negativelight focal power, and an eighth lens with positive light focal power, which are arranged successively along an optical axis from an object side to an image side, wherein the fourth lens and the fifthlens form an adhesive lens; the first lens, the fourth lens, the fifth lens, and the sixth lens are spherical lens; and the second lens, the third lens, the seventh lens, and the eighth lens are non-spherical lens. The technical scheme of the embodiment of the invention can be applicable to the field of security and defense. The lens has the characteristics of day and night confocal function, excessive large amount of light and an ultra-wide angle, especially suitable for use under a low illumination condition.

The invention discloses an optical lens and imaging equipment, and the optical lens sequentially comprises, from an object side to an imaging surface along an optical axis, a first lens with negativefocal power, wherein the object side surface of the first lens is a concave surface at a position close to the optical axis and is provided with an inflection point, and the image side surface of thefirst lens is a concave surface; a second lens with positive focal power, wherein 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; a diaphragm; a third lens with positive focal power, wherein the object side surface and the image side surface of the third lens are convex surfaces; a fourth lens with negative focal power, wherein 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; a fifth lens with positive focal power, wherein the object side surface and the image side surface of the fifth lens are convex surfaces; a six lens with negative focal power, wherein the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface near the optical axis; and a seventh lens with negative focal power, wherein the object side surface of the seventh lens is a convex surfacenear the optical axis, the image side surface of the seventh lens is a concave surface near the optical axis, and both the object side surface and the image side surface have at least one inflection point. The optical lens has the advantages of ultra-wide angle, high pixel and small size.

This super-wide lens substantially consists of a positive first lens group, a positive second lens group, and a negative third lens group, in this order from the object side. The first lens group and the third lens group are fixed and the second lens group moves toward the object side while focusing from an object at infinity to an object at the closest distance. The first lens group substantially consists of a negative first sub lens group, a positive second sub lens group, an aperture stop, and a positive third sub lens group in this order from the object side. Conditional expressions (1) and (2) are satisfied:0.15<f1 / f2<0.60  (1)2.5<f2 / f<7.0  (2), wheref1: the focal length of the first lens group,f2: the focal length of the second lens group, andf: the focal length of the entire system when focusing on an object at infinity.

The embodiment of the invention discloses an ultra-wide-field low-distortion high-pixel optical system. The optical system at least comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens from an object plane to an image plane along an optical axis. In addition, the embodiment of the invention also provides a lens. The system is applied to equipment like an intelligent monitoring device or an automobile data recorder and is mainly formed by seven lenses; and because of a few of lens, the structure of the system is simple. On the basis of combination of different lenses, the system has excellent optical performances of ultra wide field, low distortion, high pixel and day-night confocal effect.

The invention provides an ultra-wide-field image processing method and an ultra-wide-field camera system with an intelligent identification function. The system comprises a camera for shooting ultra-wide-field images and has a remote monitoring function provided by a camera body. The ultra-wide-field images shot by the camera can be distinguished to a plurality of sub-pictures with multiple applications, and after the images are subjected to distortion correction, each sub-picture can execute different identification steps. The method includes: executing correction and segmentation after the ultra-wide-field images are shot by the ultra-wide-field camera, setting identification functions of each sub-picture and respectively executing the identification steps such as target loss, license plate identification, moving track identification and invasion identification during image processing, so that no dead corner and simultaneous performing of multiple identification steps can be achieved by the aid of the ultra-wide field.

A first optical group that forms an intermediate image and a second optical group that enlarges and projects the intermediate image formed by the first optical group satisfy a variety of conditions. Therefore, first of all, in a case where a projection system is incorporated in a projector, an ultrawide field angle that allows enlargement and projection of an image at a half angle of view of 50° or greater is achieved. Further, an optical path deflection system including two optical path deflectors is disposed between the first optical group and the second optical group to allow the optical path to be folded with deterioration in performance of the projection system suppressed.

The invention relates to an optical system, an image capturing module and an electronic device. The optical system includes: a first lens element with negative refractive power, wherein an object-side surface of the first lens is concave in a paraxial region thereof; a second lens with refractive power , wherein an object-side surface of the second lens is convex in a paraxial region, and an image-side surface of the second lens is concave in a paraxial region; a third lens with positive refractive power, wherein an object-side surface of the third lens is convex in a paraxial region; a fourth lens with positive refractive power, wherein an object-side surface of the fourth lens is convex in a paraxial region, and an image-side surface of the fourth lens is convex in a paraxial region; a fifth lens with negative refractive power, wherein an object-side surface of the fifth lens is concave in a paraxial region thereof, and an image-side surface of the fifth lens is concave in a paraxial region; a sixth lens with positive refractive power, wherein an image-side surface of the sixth lens is convex in a paraxial region; and a seventh lens with negative refractive power. The optical system satisfies that FOV is greater than or equal to 120 degrees and less than or equal to 130 degrees. The optical system has an ultra-wide angle characteristic, and can acquire more scene contents to enrich imaging information of the optical system, thereby improving user experience.

The invention discloses an ultra-wide field optical photographing lens group which comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object to an image in sequence, wherein the first lens has negative refraction power; the second lens has positive refraction power; the third lens has positive refraction power and a convex surface near an optical axis on the surface of an image side; the fourth lens has negative refraction power, a concave surface near the optical axis on the surface of the image side and at least one convex surface away from the optical axis on the surface of the image side; the fifth lens has positive refraction power, a concave surface near the optical axis of the surface of the image side and a convex surface away from the optical axis of the surface of the image side; the second lens and the third lens have positive refraction power. The ultra-wide field optical photographing lens group is capable of effectively inhibitinga total length and has relatively large view angles, ultra-wide field view angles can be achieved with a short total length, and requirements of minimization and large view angles can be met.

The invention discloses an ultra-wide field-of-view off-axis three-reflector optical imaging system which comprises a main reflector with positive focal power, a second reflector with negative focal power, and a third reflector with positive focal power. The reflecting surface of the main reflector is a spherical surface. The reflecting surfaces of the secondary mirror and the third reflector are flat spherical secondary curved surfaces. The curvature radii of top points of the three reflectors approximately satisfy a flat image field condition. The main reflector generates a real image of a far scene between the main reflector and the second reflector. The second reflector and the third reflector perform relay imaging of the real image on an image plane. An aperture diaphragm is placed on the front focal plane of the third reflector, thereby realizing an image-side telecentric optical path. The main reflector inclines along an X-axis relative to incident main light of a central field-of-view. The second reflector is coaxial with the third reflector. After the main light of the central field-of-view in a meridian plane is reflected by the main reflector, an included angle is formed between the reflected main light and the common symmetric axis of the second reflector and the third reflector. The ultra-wide field-of-view off-axis three-reflector optical imaging system has advantages of ultra-wide field-of-view, intermediate relative aperture, wide working wave band, no image-side telecentric barrier, small object-side distortion, high imaging quality, etc. The ultra-wide field-of-view off-axis three-reflector optical imaging system is suitable for earth imaging observation field of a spatial camera, an imaging spectrometer, etc.

The invention relates to a long wave infrared optical athermalization temperature measuring lens with an ultra-large view field. The optical system of the lens is sequentially provided with the following components in the light incidence direction from left to right: a negative moon shape lens (A), a plano-convex lens (B), and a double convex lens (C), which are made of different materials. The provided lens has the advantages of large relative aperture, ultra-wide field angle, low deformation, self-adaptive optical athermalization compensation, and light structure. The difference of refractive index change of an optical material under different temperatures is used to compensate the influence of temperature change on a focal plane; thus the structure of athermalization design becomes simpler, the structure of overall product becomes smaller, the weight becomes lighter, the optical axis is stable, the image becomes clearer, the reliability is high, the requirements of imaging performance of customers can be met, and the structure is convenient to use for the customers.

The invention relates to a 5 mega-pixel micro camera lens with a large target surface. An optical system of the lens is provided with a front assembly A with negative focal power, a diaphragm C and a rear assembly B with positive focal power in the light ray incident direction from left to right; the front assembly A is sequentially provided with a negative crescent lens A-1, a biconcave lens A-2, a first gluing group which is formed through tight connection of a positive crescent lens A-3 and a biconcave lens A-4, as well as a biconcave lens A-5; and the rear assembly B is sequentially provided with a second gluing group formed through tight connection of a plano-convex lens B-1 and a positive crescent lens B-2, a biconvex lens B-3, as well as a third gluing group formed through tight connection of a biconvex lens B-4 and a positive crescent lens B-5. The lens has the advantages of ultra-wide field, high light gathering power, high resolution and broadband spectrum confocal performance, and can provide whole-interface sharp images superior to 5 mega-pixel for a high-definition network camera system.

The invention provides an ultra-wide-field lens. The ultra-wide-field lens 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 successively configured from an object side to an image side along an optic axis ; the first lens, the second lens and the third lens are respectively of a meniscus lens with negative power, and a concave surface of the first lens, the second lens and the third lens faces the image side; both the fourth lens and the fifth lens are respectively of a thick lens with positive power; the third lens and the fourth lens are cemented together; the sixth lens is a biconcave thin lens with negative power; and the seventh lens is a meniscus lens with positive power, and a concave surface of the seventh lens faces the image side. By adopting a reasonable optical structure, when the ultra-wide-field lens is applied to different types of mobile phones for shooting, a focal length equivalent silent frame is 11mm, an imaging angle range is 120 to 126 degrees, a greater range can be photographed in a same distance, and a higher picture quality can be achieved; and moreover, the overall size is relatively small, the structure is simple, and the cost is lower.

The invention discloses a fundus imaging eyepiece capable of being switched to a wide angle / an ultra-wide angle, the imaging eyepiece comprises two use modes, one mode is that a positive lens is used as an independently used eyepiece, and the other mode is that a negative lens is used as an independently used eyepiece; and the other mode is that a meniscus positive lens is placed between the positive lens and the imaged eyeball, the concave surface of the meniscus positive lens faces the eyeball, and the convex surface of the meniscus positive lens faces the positive lens. The eyepiece can achieve imaging in two different view ranges to adapt to different clinical application scenes, an original positive lens eyepiece can be used independently, an image mode with high resolution and high signal-to-noise ratio is achieved, and when the view range needs to be increased, the meniscus positive lens is cut into the space between the aspheric lens and the imaged eyeball; the combined eyepiece can be switched into a combined eyepiece with an ultra-large visual field, and can also be switched into an original eyepiece, so that high resolution and high signal-to-noise ratio required by most clinical application scenes are ensured, and a convenient anterior segment image inner switching mode is not damaged.

The invention provides an external lens. The external lens is arranged in the object side of a lens of imaging equipment, and comprises a first lens, a second lens, a third lens, a fourth lens and anaperture diaphragm sequentially from the object side to an imaging surface. The first lens has negative 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 negative focal power, and the image side surface of the second lens is a concave surface; the third lens has positive focal power, and the object side surface of the third lens is a convex surface; the fourth lens has positive focal power, and the object side surface of the fourth lens is a convex surface; the total optical lengthTTL of the external lens and the maximum aperture D of the external lens meet the conditional expression that TTL / D is greater than 0.5 and lower than 1. According to the external lens provided by theinvention, the field angle of the lens is increased on the premise that the imaging quality of the original lens is guaranteed; the shooting range of the original lens is effectively increased, the field angle range of the original lens can reach 190 degrees or above, 360-degree ultra-wide-angle panoramic picture shooting can be achieved, the depth-of-field range of the original lens is increased, and the panoramic high-definition shooting effect is provided.

The invention relates to a zoom lens and a camera device based on the zoom lens. The zoom lens comprises a first lens groove of positive focal power, a second lens group of negative focal power, a diaphragm, a third lens groove of positive focal power, a fourth lens groove and a fifth lens groove arranged along the light incident direction successively; the first, third and fifth lens groups are fixed, the second lens group moves from the object side to the image side along the optical axis to zoom the angle of visual field from the wide angle end to the telescoping end, and the fourth lens group moves from the image side to the object side along the optical axis to realize correction and focusing of the image side. The camera device comprises an optical filter, protective glass and a solid camera component, a light reception side of the solid camera component is arranged in the imaging surface of the zoom lens, and the optical filter and the protective glass are arranged between the fifth lens group and the image side. The zoom lens employs a positive, negative, positive, positive and positive structure and aspheric lenses, a '4k' performance is realized in a 1 / 2.5 small image diameter, and the horizontal angle of visual field can reach an ultra-wide angle of 75 degree.

One embodiment of the invention discloses an ultra-wide image pickup optical system. The system is provided with, sequentially from an object plane to an image plane along an optical axis, 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. The lenses of the optical system meet the following conditions: -0.2<f / f1<-0.09; -0.25<f / f2<-0.15; -0.3<f / f3<-0.19; 0.17<f / f4<0.23; 0.02<f / f5<0.07; 0.11<f / f67<0.18; and 0.12<f / f8<0.31. The other embodiment of the invention discloses an image pickup module. The embodiments of the invention are applicable to the fields of panoramic VR cameras and 360-degree dead-zone-free monitoring. The number of the lenses is moderate, and the structure is simple. Moreover, the ultra-wide image pickup optical system and the image pickup module have excellent performances of 240-degree ultra-wide field and eight megapixels.

The invention discloses an ultra-wide field fundus imaging system which comprises a light source, an optical splitter, a scanning assembly, a curved reflector, a detection pinhole and an imaging assembly, wherein the scanning assembly comprises a first scanning mirror and a second scanning mirror, the first scanning mirror scans in the first direction, and the second scanning mirror scans in the second direction; light emitted by the light source is reflected by the first scanning mirror, the curved reflector, the second scanning mirror and the curved reflector respectively after passing by the optical splitter and then enters the fundus; the light entering the fundus returns to the optical splitter along the same route after being reflected by the retina, penetrates through the detection pinhole and enters the imaging assembly. Compared with the prior art, the ultra-wide field fundus imaging system realizes fundus imaging by total reflection, and ghost images brought by imaging of a lens module are effectively avoided. Because the curvature of the curved reflector changes gradually, the light reflected by the curved reflector can enter the fundus at larger angle of incidence, and large view field imaging is realized.

The invention relates to an ultra-wide-angle camera lens which comprises a first lens , a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens sequentially from an object side to animage side along optical axis. The first lens has negative refraction force, and each of the object side face and the image side face is a concave face; the second lens has positive refraction force,and each of the object side face and the image side face is a convex face; the third lens has negative refraction force, the object side face is a convex face, and the image side face is a concave face; the fourth lens has positive refraction force, the object side face is a concave face, and the image side face is a convex face; the fifth lens has positive refraction force, the object side faceis a concave face, and the image side face is a convex face; the sixth lens has negative refraction force, the object side face is a convex face, and the image side face is a concave face; a diaphragmis arranged between the first lens and the second lens. The ultra-wide-angle camera lens can meet large-wide-angle and large-field-angle needs while imaging quality is ensured.