69results about How to "Excellent aberration correction" patented technology

An optical imaging lens assembly, sequentially arranged from an object side to an image side along an optical axis, comprising: the first lens element with positive refractive power having a convex object-side surface, the second lens element with negative refractive power having a convex object-side surface and a concave image-side surface, the third lens element with positive refractive power having a convex image-side surface, the fourth lens element with refractive power having both optical surfaces being aspheric, the fifth lens element with refractive power having a concave image-side surface and both optical surfaces being aspheric, wherein a stop and an image sensor disposed on an image plane are also provided. By such arrangements, the image pickup optical system satisfies conditions related to shorten the total length and to reduce the sensitivity for use in compact cameras and mobile phones with camera functionalities.

The invention relates to a laser and middle- and long-wavelength infrared common-aperture three-band imaging system, which comprises an entrance pupil shared by each band, a primary mirror, a secondary convex mirror, a middle/long-wavelength infrared optical path imaging lens group, a laser converging light spot receiving unit, a middle- and long-wavelength infrared band beam splitter, a middle- and long-wavelength infrared dual-band imaging lens group and a detection image surface, wherein the reflection surface of the primary mirror is a concave surface, and a hole is formed in the center of the primary mirror. The system can be used for realizing the common-aperture collection of scene infrared radiation energy of the same object and laser echo energy reflected by the object; and the entrance pupil is positioned in front of the primary mirror, the secondary mirror is used for the beam splitting of laser and middle- and long-wavelength infrared bands, and a dichroic mirror is inclined to split middle-wavelength infrared light and long-wavelength infrared light, so that the system is compact in structure, the utilization rates of optical energy and space of the system are increased, the aberration correction and beam focusing of middle- and long-wavelength infrared bands are facilitated respectively, and the imaging quality is remarkably improved.

An optical lens assembly for image taking, sequentially arranged from an object side to an image side, comprising: the first lens element with positive refractive power having a convex object-side surface; the second lens element with negative refractive power having a convex object-side surfaces and a concave image-side surface; the third lens element with positive refractive power having a convex image-side surface; the fourth lens element with refractive power having two aspheric optical surfaces; the fifth lens element with refractive power having a concave object-side surface and both aspheric optical surfaces; an image sensor disposed on an image plane and a stop provided for imaging a photographed object; specific relations being satisfied. Thereby, the optical lens assembly for image taking has good aberration correction, and can shorten the total length for use in compact cameras and mobile phones requiring high resolution.

The invention relates to a refraction and reflection type large aperture and large field of view imaging system. The refraction and reflection type large aperture and large field of view imaging system is characterized in that a refraction type correction plate, a reflection type primary mirror and a refraction type correction mirror group are successively arranged along an optical axis from the outside to the inside; the central area of the second surface of the correction plate is plated with a reflective coating layer, and becomes a reflection type secondary mirror; an incident light beam irradiates to the reflection type primary mirror through the refraction type correction plate; the reflection type primary mirror reflects the incident light beam to the reflection type secondary mirror; and the reflection type secondary mirror reflects the light beam to the refraction type correction mirror group, and then the light beam passing through the refraction type correction mirror group is converged on a focal plane of an optical system. The refraction and reflection type large aperture and large field of view imaging system sets the refraction type correction plate within the focus of a reflection type spherical main mirror and takes the central area of the second surface of the correction plate as the reflection type secondary mirror and the diaphragm, thus having the advantages of ultra-short lens barrel and large field of view, and being able to be widely applied to the astronomy, aviation, security and protection, and other photoelectric imaging fields. The refraction and reflection type large aperture and large field of view imaging system can realize aberration reducing design for a 11DEG-15DEG field of view. However, the field of view for a traditional refraction and reflection type imaging system is only 3DEG-4DEG.

An optical imaging lens assembly comprising five non-cemented lens elements with refractive power, sequentially arranged from an object side to an image side, comprising: the first lens element with positive refractive power, the second lens element with negative refractive power, the third lens element with refractive power having a concave object-side surface and at least one aspheric surface, the fourth lens element with positive refractive power having two aspheric surfaces, and the fifth lens element with negative refractive power having a concave object-side surface and a convex image-side surface with both being aspheric. Wherein an image sensor disposed on an image plane and a stop are also provided. By such arrangements, the image pickup optical system satisfies conditions related to shorten the total length and to reduce the sensitivity for use in compact cameras and mobile phones with camera functionalities.

The invention provides a small size uncooled dual-field-of-view infrared optical system which comprises a first positive meniscus lens and a detector. A biconcave lens, a second positive meniscus lens, a negative meniscus lens and a third positive meniscus lens are sequentially arranged from the first positive meniscus lens to the detector along the optical axis; the first positive meniscus lens, the second positive meniscus lens and the third positive meniscus lens each have positive diopter, and the biconcave lens and the negative meniscus lens each have negative diopter. Both the curved surface S3 of the biconcave lens and the curved surface S7 of the negative meniscus lens are aspheric surfaces, and the aspheric surface S7 is further provided with a binary diffraction surface. The lenses of different types are reasonably arranged and the positive diopter and the negative diopter of the lenses are selected, so that the whole dual-field-of-view infrared optical system has a smaller size and a larger zooming ratio, has a larger zooming range under the switching conditions of a narrow field of view and a wide field of view, and is suitable for occasions with small size requirements for infrared optical systems.

The invention relates to an ultra-wide-angle lens with a 2.8mm fixed focus. An optical system of the lens is provided with a front set A, a diaphragm C and a rear set B in the incidence direction of light from left to right in sequence. The front set A is sequentially provided with a negative meniscus lens A-1, a negative meniscus lens A-2 and a double convex lens A-3, wherein the focus fA of the front set A is -9.8mm. The rear set B is sequentially provided with a double convex lens B-1 and a gluing set, wherein a double convex lens B-2 is connected with a positive meniscus lens B-3 in a sealed mode to form the gluing set, the focus fB of the rear set B is 5.67mm. The ultra-wide-angle lens with the 2.8mm fixed focus has the advantages of having an ultra-wide angle, high resolution, a large relative aperture, the focus which is fixed all day long and the like. The ultra-wide-angle lens with the 2.8mm fixed focus can be matched with a CCD camera with the 3-million-pixel high resolution or a CMOS camera with the 3-million-pixel high resolution, is generally used in places with a small visibility range and a large view angle such as elevator cages and halls, and is a mainstream product of a miniature monitoring image pickup system.

An optical image capturing system includes, along the optical axis in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, wherein at least one lens among the first to the fifth lenses has positive refractive force and the fifth lens can have negative refractive force, and wherein both surfaces thereof are aspheric, and at least one surface thereof has an inflection point such that the lenses in the optical image capturing system which have refractive power include the first to the fifth lenses, whereby the optical image capturing system can increase aperture value and improve the imaging quality for use in compact cameras.

The invention relates to a large-target-surface high-precision mold high-definition zooming monitoring lens. An optical system of the lens is provided with a front lens battery A with negative focal power, an iris diaphragm C and a rear lens battery B with positive focal power in sequence in the light incidence direction. The front lens battery A is provided with a negative meniscus lens A-1 and a first bonding lens battery in sequence, wherein the first bonding lens battery is composed of a biconcave lens A-2 and a biconvex lens A-3 in a sealed connection mode. The rear lens battery B is provided with a biconvex lens B-1, a negative meniscus lens B-2, a negative meniscus lens B-3, a second bonding lens battery and a third bonding lens battery in sequence, wherein the second bonding lens battery is composed of a biconvex lens B-4 and a biconcave lens B-5 in a sealed connection mode, and the third bonding lens battery is composed of a biconvex lens B-6 and a negative meniscus lens B-7 in a sealed connection mode. According to the large-target-surface high-precision mold high-definition zooming monitoring lens, the focal power of the front lens battery A and the focal power of the rear lens battery B are distributed reasonably, and the two bonding lens batteries are adopted in the rear lens battery B, so that the lens meets the performance indexes of large relative aperture, wide angle, small structure length, large surface and high-definition pixels.

An imaging lens, although compact, has satisfactorily corrected aberrations. The imaging lens is configured by disposing, in sequence from the object side, a stop (ST); a first lens (L1), which has a double convex shape near the optical axis; a meniscus-shaped negative second lens (L2) which has near the optical axis a convex surface facing the object side; a meniscus-shaped positive third lens (L3) which has near the optical axis a concave surface facing the object side; and a positive fourth lens (L4) which has a double convex shape near the optical axis. In the configuration, the refractive power of the first lens (L1) is greater than the refractive power of each of the second lens (L2), the third lens (L3), and the fourth lens (L4).

The invention discloses an optical lens set for camera shooting and a camera shooting device of the optical lens set for camera shooting. The optical lens set for camera shooting sequentially comprises a prism, a first lens group, a second lens group, a third lens group and a fourth lens group along optical shaft arrangement. The prism is a full-reflecting lens. The first lens group has negative focal power and comprises at least one lens with the negative focal power. The second lens group has the positive focal power and comprises at least one lens with an aspheric optical face. The third lens group has positive focal power and comprises at least one lens with positive focal power and at least one lens with negative focal power. The fourth lens group has positive focal power and comprises at least one lens with an aspheric optical face. Therefore, the optical lens set for camera shooting and the camera shooting device of the optical lens set for camera shooting can also be applied to a thin lens module applied to camera shooting, apart from the good function of aberration correction.

An image forming optical system has a positive lens group disposed closer to its object side than an aperture stop, and the values of θgF1 and other constants of at least one lens LA included in the positive lens group fall within three ranges including a range bounded by the straight lines given by the equation θgF1=α1×νd1+βgF1 (where α1=−0.00566) into which the lowest and highest values in the range given by a first conditional expression are substituted respectively, a range bounded by the straight lines given by the equation nd1=a1×νd1+b1 (where a1=−0.0267) into which the lowest and highest values in the range given by a second conditional expression are substituted respectively, and a range defined by a third conditional expression.

The invention relates to a ten-million-pixel large-target-surface minitype pickup lens for day and night use. The optical system of the lens is provided with a front group A, a diaphragm C and a rear group B along the ray incidence direction from left to right, wherein the front group A is successively provided with a negative crescent lens A-1, a biconcave lens A-2, a planoconvex lens A-3 and a positive crescent lens A-4; the rear group B is successively provided with a gluing group tightly connected with a biconvex tens B-1 and a biconcave lens B-2, a biconvex lens B-3 and a biconvex lens B-4. The lens uses a remote distance reflecting structure with separated positive and negative focal power, the focal length fA of the front group A is -10.82mm and the focal length fB of the rear group B is 5.91mm; and after the two components are combined, the rear angle of the lens moves forward and the rear intercept of the lens l is greater than or equal to 1.6f. The lens has the advantages of low distortion, high resolution, water, dust and scraping prevention, day and night use and large target surface.

An optical lens for image pickup, sequentially arranged from an object side to an image side, comprising: the first lens element with positive refractive power having a convex object-side surface, the second lens element with negative refractive power having a convex object-side surface and a concave image-side surface, the plastic third lens element with positive refractive power having a concave object-side surface and a convex image-side surface with both being aspheric, the plastic fourth lens element with positive refractive power having a convex object-side surface and a concave image-side surface with both being aspheric. By such arrangements, the optical lens for image pickup satisfies conditions related to reduce the sensitivity and to shorten the total length for use in compact cameras and mobile phones with camera functionalities.

The invention relates to a day and night prime lens with high resolution ratio. A front set A with the negative focal power and a rear set B with the positive focal power are sequentially arranged in an optical system in the incident direction of light from left to right, the front set A is sequentially provided with a negative crescent lens A-1 and a biconcave lens A-2, the focal length fA of the front set A is equal to -8.66 mm, the rear set B is sequentially provided with a biconvex lens B-1 and a gluing set which is formed by sealing a biconvex lens B-2 and a biconcave lens B-3, and the focal length fB of the rear set B is equal to 6.92 mm. According to the lens, the focal power of the front set A and the focal power of the rear set B are reasonably distributed, and the day and night prime lens has the advantages of being large in relative aperture, high in resolution, wide in spectrum, confocal and the like, and is a mainstream product in a micro type television monitoring and image pickup system.

The invention relates to a principal focus type refracting-reflecting optical system having an aperture of above 1m, a viewing field of above 3 degrees and a flat image surface, which is convenient for being externally connected with a focal plane photoelectric receiving device and can be used for ground-based observation. The principal focus type refracting-reflecting optical system comprises a paraboloidal primary lens (1), a correction group (2) and a focal plane shutter (6), wherein the correction group comprises four correction lenses which are a first lens (2) having positive focal power and being a meniscus lens with a convex surface facing the primary lens, a second lens (3) having negative focal power and being a meniscus lens with a convex surface facing the primary lens, a third lens (4) having negative focal power and being a meniscus lens with a convex surface facing the primary lens and a fourth lens (5) having positive focal power respectively. In the correction group (1), only the concave surface of the first lens (2) is a paraboloid, the concave surfaces of other lenses are spherical surfaces.

The invention discloses an endoscopic image-capturing objective lens optical system comprising a first lens group, a diaphragm and a second lens group from an object side to an image side. The first lens group has positive power. The second lens group has negative power and satisfies a following conditional expression: f/H (L1r1) < 4; H (L1r1)/IMH < 0.5; TTL/f < 2.9; wherein f is the focal length of the endoscopic image-capturing objective lens optical system, H(L1r1) refers to the height of a main light ray corresponding to the maximum image height during conventional observation passing through a surface of the object side of the first lens group, IMH refers to the maximum image height on a corresponding chip light-sensitive surface during conventional observation, TTL refers to the distance on an optical axis from the object-side surface to the first lens. The endoscopic image-capturing objective lens optical system has a small diameter, a wide field of view, good aberration correction and compact structure.

The invention discloses a camera shooting lens set and a camera shooting device of the camera shooting lens set. The camera shooting lens set sequentially comprises a prism, a first lens set body, a second lens set body and a third lens set body along an optical axis, the prism is a total reflection type lens, the first lens set body has the negative power and comprises at least one first lens set negative lens and at least one first lens set positive lens, the second lens set body has the positive power and comprises at least one second lens set positive lens and at least one second lens set negative lens, the third lens set body has the positive power and comprises at least one third lens set lens, and at least one optical surface of the at least one third lens set lens is an aspheric surface. The camera shooting lens set and the camera shooting device are good in aberration amendment and can be applied to small-size lens modules used for camera shooting.

The invention relates to a low-distortion high-resolution day and night dual-purpose miniature pick-up lens, comprising a front set A with negative focal power and a rear set B with positive focal power, wherein the front set A and the rear B are arranged along the incident direction of light from left to right. The miniature pick-up lens provided by the invention is characterized in that the front set A comprises a negative crescent lens A-1, a biconvex lens A-2 and a plano-concave lens A-3; the rear set B comprises a bonding group formed by hermetically adhering a biconvex lens B-1 with a biconcave lens B-2, a negative crescent lens B-3, and a bonding group formed by hermetically adhering a negative crescent lens B-4 with a biconvex lens B-5. The low-distortion high-resolution day and night dual-purpose miniature pick-up lens has the advantages of low distortion, large relative aperture, high resolution and broad spectrum confocal, and is a mainstream product for a miniature television monitoring pick-up system.

The invention discloses an optical image-taking lens. The optical image-taking lens comprises four lenses, the four lenses are successively a first lens having positive focal power, a second lens having a negative focal power, a third lens having a positive focal power and a fourth lens having a negative focal power from the object side to the image side, and an optical face of the image side is provided with at least one inflection point. Each lens comprises at least one aspheric surface. The optical image-taking lens further comprises a diaphragm disposed between a photographed object and the second lens and an image sending assembly disposed on an imaging surface. A distance of the first lens from an object side optical surface to the imaging surface on an optical axis is TTL, an overall optical system focal length of the optical image-taking lens is f, a vertical distance between the optical axis and an intersection point projected on the imaging surface by a light ray which passes through the center of the diaphragm at an incident angle relative to the optical axis from an object side direction is Y1, and the optical image-taking lens meets a relational expression: 1.3<TTL/f<1.8, and 0.8<Y1/f<0.98. The optical image-taking lens has the good resolving power, can reduce the total length, and then can be applied to a camera, a mobile phone camera and the like which have good photographing purpose use demand.

The invention provides a zoom lens, wherein the zoom lens realizes miniaturization of diameter of a front lens and shortens total length of the lens system in light axis direction apart from maintaining high optical performance. The zoom lens comprises four lens assemblies from a first lens assembly (G1) to a forth lens assembly (G4). The first lens assembly (G1) and the third lens assembly (G3) are fixed, and the second lens assembly (G2) is moved when zooms in or out, and the forth lens assembly (G4) is moved to correct image plane position of the zoom and focus. The first lens assembly (G1)comprises a negative lens and two positive lens. The second lens assembly (G2) comprises four lens with one negative lens having a aspheric surface. The following conditional expression (1), (2) aresatisfied: 6.0<f1/fw<8.0 (1), 0.10<H2f/fw<0.20 (2). Further more, f1 means focal distance of the first lens assembly, fw means focal distance of the entire system on a wide-angle end, H2f means distance from object side of a lens that nearest to the object side of the second lens assembly to an light axis of a principal point on an object side of the second lens assembly.