53results about How to "Well corrected for aberrations" patented technology

A folded telephoto lens system may include multiple lenses with refractive power and a light path folding element. Light entering the camera through lens(es) on a first path is refracted to the folding element, which changes direction of the light on to a second path with lens(es) that refract the light to form an image plane at a photosensor. At least one of the object side and image side surfaces of at least one of the lens elements may be aspheric. Total track length (TTL) of the lens system may be 14.0 mm or less. The lens system may be configured so that the telephoto ration (TTL / f) is less than or equal to 1.0. Materials, radii of curvature, shapes, sizes, spacing, and aspheric coefficients of the optical elements may be selected to achieve quality optical performance and high image resolution in a small form factor camera.

A compact telephoto lens system that may be used in a small form factor cameras. The lens system may include five lens elements with refractive power. Alternatively, the lens system may include four lens elements with refractive power. At least one of the object side and image side surfaces of at least one of the lens elements is aspheric. Total track length (TTL) of the lens system may be 6.0 mm or less. Focal length f of the lens system may be at or about 7.0 mm (for example, within a range of 6.5-7.5 mm). Lens elements are selected and configured so that the telephoto ratio (TTL / f) satisfies the relation 0.74<TTL / f<1.0. Materials, radii of curvature, shapes, sizes, spacing, and aspheric coefficients of the lens elements may be selected to achieve quality optical performance and high image resolution in a small form factor telephoto camera.

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens. The lens sequentially comprises an aperture, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with refractive power, a sixth lens with positive refractivepower and a seventh lens with negative refractive power from the object side to the image side. The focal length of the first lens is f1, the focal length of the second lens is f2, the axial thickness of the fourth lens is d7, the axial distance between the image side surface of the third lens and the object side surface of the fourth lens is d6, and the following relational expressions are met:-11.00<=f2 / f1<=-6.00; and 5.00<=d7 / d6<=10.00. The camera shooting optical lens can meet the design requirements of large aperture, ultra-thinness and wide angle while having the good optical performance.

An image capturing optical lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element with negative refractive power has a concave object-side surface. The third lens element has refractive power. The fourth lens element with refractive power has a concave object-side surface and a convex image-side surface. The fifth lens element with refractive power has a concave image-side surface, wherein an object-side surface and the image-side surface of the fifth lens element are aspheric, and the fifth lens element has at least one inflection point on the image-side surface thereof.

The invention relates to the field of optical lenses, and discloses an optical lens for camera shooting. The optical lens for camera shooting comprises an aperture, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power and a fifth lens with negative refractive power from the object side to the image side in sequence; the focal length of the optical lens for camera shooting is f, the focal length of the first lens is f1, the focal length of the third lens is f3, the curvature radius of the object-side surface of the third lens is R5, the curvature radius of the image-side surface of the third lens is R6, and the following relational expressions are satisfied: 0.80<=f1 / f<=0.90, 70.00<=f3 / f<=120.00, and -450.00<=(R5+R6) / (R5-R6)<=-430.00. The camera optical lens can meet the design requirements of large aperture, ultra-thinning and wide angle while having good optical performance.

The invention discloses a main-mirror and three-mirror integrated coaxial three-reflector infrared optical imaging device, and belongs to the technical field of infrared optical imaging. The device solves technical problems that a conventional spatial infrared reflecting-type optical device is large in size and weight. A reflecting main mirror and three reflectors of the device are of an integrated structure, and are installed in a main mirror seat through a main mirror core shaft. A secondary mirror seat is fixedly connected with the main mirror seat through a truss assembly, and a reflectingsecondary mirror is fixed on the secondary mirror seat through a secondary mirror core shaft. A secondary mirror shading cover is embedded in the truss assembly. A lens cone is connected with the main mirror seat, and a detector support is connected to an outer side of the main mirror seat. The image plane of a detector is installed on the detector support. The device employs a main-mirror and three-mirror integrated optical integrated imaging system design, and forms a super-compact coaxial three-reflector infrared optical imaging device. The device reduces the size, weight and cost of a spatial infrared optical system under the same focal length, increases the optimization variables of the system, and can achieve the better correction of aberration.

The invention relates to a refrigeration type medium wave infrared light and laser double-mode common-caliber camera lens. An optical system of the camera lens comprises a front infrared light and laser common-caliber set A, a rear infrared light set B and a rear laser set C. A positive lens A-1, a negative lens A-2, a positive lens A-3 and a light splitter A-4 are sequentially arranged on the front infrared light and laser common-caliber set A in the light incident direction. After light passes through the front infrared light and laser common-caliber set A, one path of the light is reflected to the rear infrared light set B, and the other path of the light is transmitted to the rear laser set C. A positive lens B-1, a negative lens B-2 and a reflector B-3 are sequentially arranged on the rear infrared light set B in the light incident direction. A positive lens C-1, a positive lens C-2, a reflector C-3, a positive lens C-4, a positive lens C-5, a light filter C-6 and a positive lens C-7 are sequentially arranged on the rear laser set C in the light incident direction. The camera lens has the advantages that medium wave infrared light and lasers are received in a common-caliber mode, and imaging quality, resolution, anti-jamming capability, operational flexibility and operational effectiveness are high.

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens. The camera shooting optical lens sequentially comprises an aperture, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power and asixth lens with negative refractive power from an object side to an image side. The focal length of the camera shooting optical lens is f, the focal length of the second lens is f2, the curvature radius of the object side face of the third lens is R5, and the curvature radius of the image side face of the third lens is R6; and the following relational expressions are met: -2.50<=(R5+R6) / (R5-R6)<=-1.00; -7.00<=f2 / f<=-3.50. The camera shooting optical lens can meet the design requirements of large aperture, ultra-thinness and wide angle while having the good optical performance.

A zoom lens includes, in order from object side, a positive first lens unit which does not move for varying magnification, a negative second lens unit which moves for varying magnification, a negative third lens unit which moves for varying magnification, and a positive fourth lens unit which does not move for varying magnification, wherein the first lens unit includes a positive lens which satisfies the following conditions: 70<νp<85; 2.31<Np+0.01×νp<2.58; and 1.6<Np<1.85, where Np is refractive index of the positive lens, and νp is Abbe constant of the positive lens, and 1.25<|fp / fna|<1.7 is satisfied, where fp is focal length of the positive lens, and fna is combined focal length of negative lenses in the first lens unit defined by the equation:fna=1∑i=1n1fni,where n is a number of the negative lenses in the first lens unit, and fni is focal length of the i-th negative lens.

A photographing optical lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element has an object-side surface being convex in a paraxial region thereof. The second lens element has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The third lens element has an object-side surface being convex in a paraxial region thereof. The fourth lens element has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The fifth lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof.

An imaging lens assembly includes six lens elements, the six lens elements being, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element has negative refractive power. The second lens element has positive refractive power. The fifth lens element has positive refractive power.

A curved surface image-conversion optical system is configured to take an image of a hemispherically curved object or project it as a curved surface image, which optical system includes a front unit formed of a transparent medium rotationally symmetric about a center axis and having at least two internal reflecting surfaces and two transmitting surfaces, a rear unit that is rotationally symmetric about the center axis and has positive power, and an aperture located coaxially with the center axis. The front unit includes the first transmitting surface through which a light beam from an object point is incident on the front unit, the first reflecting surface for reflecting the transmitted light beam, the second reflecting surface for reflecting the reflected light beam and the second transmitting surface through which the reflected light leaves the transparent medium.

The embodiment of the invention discloses an optical system, a lens module and terminal equipment. 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 arranged from the object side to the image side, wherein the first lens and the fifth lens have negative refractive power, the other lenses havepositive refractive power, and the optical system satisfies the following conditional expressions: 40 < (HFOV * f) / Imgh < 60, wherein HFOV is the field angle of the optical system in the horizontal direction, f is the effective focal length of the optical system, and Imgh is the image height corresponding to the field angle of the optical system in the horizontal direction. Through reasonable configuration of refractive power of the first lens to the seventh lens in the optical system and limitation of (HFOV * f) / Imgh, the optical system is enabled to meet the characteristics of long focal length and high pixel, a long-distance object can be clearly shot, the image quality is better, and the image has more details.

A lens assembly includes a first lens including a first convex surface facing the object side, a first concave surface with an aperture stop facing the image side; a second lens including a second convex surface facing the object side and a second concave surface facing the image side; a first lens further including. Defining that f, f1, f2 are a focal length of the lens assembly, the first lens, and the second lens; D is a distance between the first lens and the second lens; TTL is a total track length; R1 is a radius of the first convex surface; R2 is a radius of the first concave surface; R3 and R4 are respectively radius of the second convex surface and the second concave surface; and Φ is the image circle; the following conditions are satisfied: 0.01<|f / f2|<0.2; 0.1<R1 / f1<0.5; 0.8<f1 / TTL<1.1; 0.2<D / f<0.5; 0.3<R2 / Φ<0.7; and 0.03<(R3−R4) / (R3+R4)<0.3.

The invention discloses an optical engine for a barcode recognition device. The optical engine comprises a lens module, a light supplementing module and a sensor circuit module, wherein the light supplementing module and the sensor circuit module are arranged on the two sides of the lens module respectively. First positive lens bodies are installed at the positions corresponding to light sources in the light supplementing module, and the light sources adopted to the light supplementing module are one kind or the combination of more than one kind of white light sources, red light sources and near-infrared light sources. The optical engine for the barcode recognition device further comprises an outer cover which covers the light supplementing module and is connected with a lens module base, and the first positive lens bodies are installed at the positions, corresponding to the light sources, of the outer cover. The lens module comprises the lens module base, a lens base and an imaging lens, wherein the lens base is arranged on the lens module base, the imaging lens is installed on the lens base, the number of optical lens bodies installed inside the imaging lens is five, and the optical lens bodies are sequentially the second positive lens body, the first negative lens body, the third positive lens body, the fourth positive lens body and the second negative lens body from the position far away from the front end of the lens of the lens module base to the position close to the rear end of the lens of the lens module base. According to the optical engine for the barcode recognition device, the recognition success rate of the barcode recognition device is improved.

Provided is an imaging lens, and also provided are an image pickup apparatus and a portable terminal both equipped with the imaging lens. The imaging lens includes in order: a positive first lens having a convex object-side surface; a negative second lens having a concave image-side surface; a negative meniscus-shaped third lens having a convex object-side surface; a positive fourth lens having a convex image-side surface; and a negative fifth lens having a concave image-side surface. The image-side surface of the fifth lens is aspherical and has an inflection point at a position of the optical axis. The third and the fourth lenses are integrally moved to focus, and the following conditional relation is satisfied: 0.75<f34 / f<1.30, where f34 is the combined focal length of the third lens and the fourth lens, and f is the focal length of the entire system of the imaging lens.

The invention relates to the technical field of optical imaging devices, and particularly discloses a camera lens, a camera module, electronic equipment and an automobile. The camera lens comprises afirst lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object side to an image side, wherein the first lens element has negativerefractive power, the second lens element has negative refractive power, the third lens element has positive refractive power. the fourth lens element has positive refractive power, the fifth lens element has negative refractive power, The sixth lens element has positive refractive power. The camera lens can directly keep small size and light weight without increasing the number of lens pieces, can keep good optical performance, and can well capture details of a shot object.

The invention relates to a transmitting optical element that is capable of taking images having a wide angle-of-view in general, and an image coming primarily from a vertical direction to a center axis in particular in simplified construction, is of small-format size and well corrected for aberrations, and an optical system using the same. The optical system is an imaging system that is adapted to form an object (6) around the center axis (1) on an image plane (7) orthogonal to the center axis (1). That imaging system comprises a front unit (3) rotationally symmetric about the center axis (1) and a rear unit (4) that is rotationally symmetric about the center axis (1) and has positive power. The front unit (3) comprises at least one transmitting optical element (2) formed of a transparent medium comprising two transmitting surfaces (21, 22) rotationally symmetric about the center axis (1) and having a refractive index of greater than 1. At least one transmitting surface (21, 22) of the transmitting optical element (2) is configured such that a normal thereto makes an angle with the center axis (1) near where the center axis (1) intersects the transmitting surface (21, 22).

The invention relates to a high-resolution aspheric photoetching object lens which belongs to the technical field of a high-resolution projection photoetching object lens. The high-resolution aspheric photoetching object lens comprises a front lens set and a rear lens set. The numerical aperture is 0.75, and 29 lenses are used in total, 3 surfaces of the 29 lenses use aspheric surfaces for 10 times; and the lenses are made of fused quartz and calcium fluoride used for correcting chromatic aberration. The invention further improves the resolution of the existing projection photoetching object lens, and greatly improves the imaging quality by using a small quantity of low order aspheric surfaces; and the radius and the thickness space of each lens element are changed in the optimizing process to fit with the aspheric surface so as to carry out aberration correction better. When the central optical line is used as a reference, the wave aberration of homochromy mean square root is less than nm, and the aberrance is less than 0.7nm.

An optical system of LED variable-focus imaging lamp, comprises a LED light source module, a light-collecting assembly, a shutter assembly and a zoom lens assembly, which are installed in sequence according to the direction of a light path. Geometry centers of the module and assemblies are collinear with a primary optic axis A. A focal point F1 of said light-collecting assembly coincides with a focal point F2 of the zoom lens assembly. Said zoom lens assembly comprises a first zoom lens, a diaphragm and a second zoom lens. Said first zoom lens and the second zoom lens can move forward or backward along the direction of the primary optic axis A so that zoom is realized. Said diaphragm is disposed between the first zoom lens and the second zoom lens, and the clear aperture of which is adjustable.

The invention relates to an optical system, a camera module and electronic equipment. The optical system includes: a first lens element having an object-side surface being convex in a paraxial place and an image-side surface being concave in a paraxial place; a second lens element with positive refractive power which has an object-side surface and an image-side surface being convex in a paraxial place; a third lens element having an object-side surface being convex in a paraxial place; a fourth lens element with positive refractive power having an image-side surface being convex in a paraxial place; a fifth lens element with negative refractive power having an object-side surface being convex in a paraxial place and an image-side surface being concave in a paraxial place; a sixth lens element with positive refractive power, the object-side and image-side surfaces thereof being convex in paraxial place; and a seventh lens element having an object-side surface being convex in a paraxial placeand an image-side surface being concave in a paraxial place. The optical system satisfies the following relation: TTL / d15 is more than 3.8 and less than 4.3, TTL is the total optical length, and d15 is the sum of the thicknesses of all the lenses from the first lens to the fifth lens on the optical axis. The optical system can achieve both miniaturization and good imaging quality.

A relay finder optical system, of a single-lens reflex camera, includes a condenser lens group, a prism, and a relay lens group, in this order from a primary imaging plane.An image, which is formed on the primary imaging plane, and is upside down and inverted from left to right, is re-formed on a secondary imaging plane for viewing by a photographer.The relay lens group includes a positive front lens group, a negative intermediate lens group, and a positive rear lens group, in this order from the object.The most photographer's-eye side lens element of the positive rear lens group comprises a positive lens element having a convex surface facing toward the image, and satisfies the following conditions:1<SF   (1)−6<f / fM<−3   (2)SF: the shaping factor of the most photographer's-eye side positive lens element (SF=(r1+r2) / (r1−r2)); r1: the radius of curvature of the object-side surface of the most photographer's-eye side positive lens element; r2: the radius of curvature of the photographer's eye-side surface of the most photographer's-eye side positive lens element; f: the focal length of the relay finder optical system; and fM: the focal length of the negative intermediate lens group.

The invention relates to a near-infrared large-aperture lens. The lens comprises a first lens,a second lens,a third lens,a diaphragm,a fourth lens,a fifth lens,a sixth lens and a seventh lens which are sequentially arranged from the object side to the imaging side; the first lens,the fourth lens and the fifth lens are negative light focus lenses; the second lens,the third lens,the sixth lens and the seventh lens are positive light focus power lenses; in the direction from the object side to the image side,the first lens is a convex-concave lens; the fifth lens is a concave-convex lens; the sixth lens is a dual-convex lens; the seven lens is a convex-concave lens. The near-infrared large-aperture lens has the advantages of being large in view angle,low in deformation and small in size.

The invention discloses an optical lens, a camera module and electronic equipment. The optical lens comprises first to fifth lenses from an object side to an image side along an optical axis; the first lens has positive focal power, and the object side surface of the first lens is a convex 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 focal power; the fourth lens has focal power, and the object side surface of the fourth lens is a convex surface; and the fifth lens has focal power, and the object side surface and the image side surface of the fifth lens are a convex surface and a concave surface. The optical lens further meets the relational expression that TTL / ImgH is larger than 1.1 and smaller than 1.3. According to the optical lens, the camera module and the electronic equipment provided by the embodiment of the invention, the design requirements of miniaturization, large image surface and high imaging quality of the optical lens can be met.

A lens system has a plurality of lenses, a stop, and a diffractive surface, the entire lens system moves during focusing, and the lens system satisfies the condition of β≧0.5, where β is a maximum photographic magnification.

The invention relates to an optical axis dislocation type helmet monocular and a working method thereof. The optical axis dislocation type helmet monocular is characterized in that an optical lens group is installed in the telescope lens cone, and the first end of the connecting support is movably connected with the telescope lens cone; the second end of the connecting support is rotatably hingedto the helmet mounting base, the connecting support is provided with a mechanism capable of adjusting the up-down swing angle, the left-right swing angle and the front-back distance, the optical assembly is of a prism structure, the length and size of the lens cone are greatly reduced, handholding is not needed in the using process, the overall weight can be reduced, and physical strength is saved.