35results about How to "No vignetting" patented technology

The present invention relates to a telecentric F-theta optical lens and an optical system; the optical lens comprises a first lens, a second lens, a third lens and a four lens, which are arranged in sequence along an incidence direction; the first lens is a double concave negative lens; the second lens is meniscus positive lens with a curved surface toward the incidence side; the third lens is a plane convex positive lens or a double convex positive lens; the fourth lens is a convex plate positive lens or a double convex positive lens. Besides, preferably the optical power of each lens and the system optical power of the optical lens satisfy that: f1 / fw is more than -0.65 and less than -0.55, f2 / fw is more than 1.6 and less than 2.5, f3 / fw is more than 0.8 and less than 1.2, f4 / fw is more than 2.2 and less than2.5, wherein, f1, f2, f3 and f4 are the optical powers of the first lens, the second lens, the third lens and the fourth lens respectively; fw is the system optical power of the optical lens; by arranging the four lenses to be a 'negative-positive-positive-positive' separated optical power system, the exit pupil position of the F-theta optical lens is positioned at an afocal position, and the image main light in the field of view is parallel mutually and perpendicular to the imaging surface. Besides, the astigmatism and the field curvature of the system are regulated perfectly, the imaging on the whole field of view is uniform, and no vignetting exists.

The invention discloses a seamless splicing imaging photoelectric system based on double lenses and nine surface array detectors. The seamless splicing imaging photoelectric system has two imaging system structure and adopts a prism beam splitting mode; imaging of eight surface array detectors is realized on a first lens, wherein four surface array detectors are arranged on a main image surface and four surface array detectors are arranged on four side image surfaces respectively; imaging of the last surface array detector is realized on a second lens; and the two imaging systems and the surface array detectors are combined together to realize image surface seamless splicing formed by the nine surface array detectors in a 3*3 mode. A beam splitting prism is a combination of a rectangular pyramid and four half rectangular pyramid mirrors; and a beam splitting surface realizes beam splitting in a semi-transparency and semi-reflection manner, so that equivalent beam splitting is realized, and spliced vignetting of the surface array detectors can be eliminated. The seamless splicing imaging photoelectric system can be applied to aviation and aerospace optical imaging devices and optical detectors as well as equipment, in particular to aviation and aerospace mapping cameras of large-view-field ultra-large surface array detectors.

The invention discloses a seamlessly spliced photoelectronic imaging system with double lens using 25 area-array detectors. The photoelectronic imaging system is characterized in that a structure of two imaging systems and a prism beam splitting way are adopted; on a first lens, imaging of 17 area-array detectors is realized, wherein 9 area-array detectors are disposed on a main image surface, and 8 area-array detectors are disposed on four lateral image surfaces, specifically, 2 area-array detectors are disposed on each of the four lateral image surfaces respectively; on a second lens, imaging of 8 area-array detectors is realized, wherein 4 area-array detectors are disposed on a main image surface, and 4 area-array detectors are disposed on four lateral image surfaces, specifically, 1 area-array detector is disposed on each of the four lateral image surfaces respectively; the two imaging systems and the area-array detectors are combined to realize seamless splicing of the image surfaces which are formed by 25 area-array detectors in a 5*5 mode; a beam splitting prism is realized through combination of one rectangular pyramid mirror and four semi-rectangular pyramid mirrors; beam splitting on a beam splitting surface is realized by adopting half-transmission and half-reflection, so that equal-energy beam splitting is realized, and splicing vignetting of the area-array detectors is eliminated. The system disclosed by the invention can be applied to aeronautic and astronautic optical imaging and optical detection instruments and equipment, and is particularly suitable for aeronautic and astronautic surveying and mapping cameras with large fields of view and using ultra-large area-array detectors.

The invention relates to a wide-aperture optical lens for laser, comprising a lens group and a diaphragm positioned in front of the lens group, wherein the lens group includes four lenses which are afirst lens, a second lens, a third lens and a fourth lens and are sequentially distributed into a negative-positive-positive-positive separation focal power system, and the ratio of the focal power ofthe lenses to the focal power of the focal power system accords with the following requirements: -0.8<f1 / fw<-0.6, 4.0<f2 / fw<4.6, 0.8<f3 / fw<1.1 and 1.5<f4 / fw<1.8. Compared with a common f(theta) lensfor the laser with same focal length, the relative aperture and the light pass diameter of the wide-aperture optical lens are 2-3 times longer than those of the common f(theta) lens for the laser, andthe longest light pass diameter of the wide-aperture optical lens can reach 30 mm; and in addition, the wide-aperture optical lens can ensure that the astigmatism and the field curvature of the focalpower system are well rectified and achieve uniform imaging on a full view field without vignetting.

A projection screen characterized by comprising a film layer (A) containing a thermoplastic resin having a total light transmittance of 30-80% and a total light reflectance of 20-70%. Regardless of reflected light or transmitted light, the projection screen can display images.

The invention discloses a camera module, a camera anti-shake system, a camera anti-shake method and a mobile terminal. The camera module comprises a camera module body, a stator, a rotor, a translation anti-shake circuit board and a bottom board circuit board, the camera module body is placed on the translation anti-shake circuit board; the rotor is fixedly sleeved outside the camera module body,and at least two adjacent frames of the rotor are respectively and fixedly provided with a first rotary driving piece; the lower end of the stator is fixedly arranged on the translation anti-shake circuit board, and the rotor is sleeved with the stator; a second rotary driving piece is arranged on the inner side of the stator; two or four first translation driving pieces are arranged in the middleof the bottom plate circuit board; the translation anti-shake circuit board is located right above the bottom board circuit board, and the translation anti-shake circuit board is connected with the bottom board circuit board through a connecting column; and a second translation driving piece is arranged on the translation anti-shake circuit board. The camera module, the camera anti-shake system,the camera anti-shake method and the mobile terminal have a photographing anti-shake function.

The invention provides a long-focus multipurpose photographic lens. The lens comprises a main lens barrel, a telescopic barrel and a camera adapter which are connected in turn, wherein a main object lens group is arranged in the main lens barrel close to an observed object end and comprises a first object lens, a second object lens and a third object lens which are arranged along the light propagation direction; the first object lens and the second object lens are combined into a cemented object lens; a correction lens group is arranged in the telescopic barrel far away from the observed object end and comprises a first correction lens and a second correction lens which are arranged along the light propagation direction; and at least one of the lenses is an extra-low dispersion (ED) glass lens. The lens is realized in a novel four-group five-piece mode, and the optical quality of the lens is superior to that of a bird-watching telescope of the same specification and the long-focus lens of a single lens reflex camera; and the lens can be used as the long-focus lens of various single lens reflex cameras for photographing, can be used for the bird-watching telescope, a target-watching telescope, a telescope and the like for watching landscapes and birds, and can realize a full frame function to have multiple functions.

The invention relates to a wide-aperture optical lens for laser, comprising a lens group and a diaphragm positioned in front of the lens group, wherein the lens group includes three lenses which are afirst lens, a second lens and a third lens and are sequentially distributed into a negative-positive-positive separation focal power system, wherein the first lens is a negative lens in a curved moonshape, and the curved surface of the first lens is curved towards the direction of the diaphragm; the second lens and the third lens are both positive lenses in the curved moon shape, and the curvedsurfaces of the second lens and the third lens are also curved towards the direction of the diaphragm; and the ratio of the focal power of the lenses to the focal power of the focal power system accords with the following requirements: -0.5<f1 / fw<-0.4, 0.55<f2 / fw<0.65 and 0.8<f3 / fw<1. Compared with a common f(theta) lens for the laser with same focal length, the relative aperture and the light pass diameter of the wide-aperture optical lens are 2-3 times longer than those of the common f(theta) lens for the laser, and the longest light pass diameter of the wide-aperture optical lens can reach30 mm; and in addition, the wide-aperture optical lens has large required view field and long focal length.

The invention discloses an endoscope comprising a head end structure, a bending part connected with the head end structure, an insert tube connected with the bending part, a handle connected with the insert tube and a display screen installed on the handle; the head end structure is provided with a shooting assembly and light guide fiber therein; the shooting assembly comprises a high definition object lens and a camera; a section of an inner hole of the head end structure has a four-leaf clover shape structure, wherein four waist-shaped holes of the four-leaf clover shape structure are filled with the light guide fiber. The diameter [phi] of the insert part of the endoscope is 3mm and the periphery of the endoscope can be illuminated; clear determination images can be obtained in a small diameter pipeline (chamber channel) through a stable illumination environment and can be transmitted to a host display screen; shooting angles can be conveniently adjusted for observation.

From an object side to an imaging surface along an optical axis, the lens comprises: a first lens with negative focal power, the object side surface of which is a convex surface and the image side surface of which is a concave surface; a second lens, wherein the object side surface is a concave surface, and the image side surface is a convex surface; a diaphragm; a third lens, wherein the object side surface and the image side surface are convex surfaces; a fourth lens, wherein the object side surface and the image side surface are concave surfaces; a fifth lens, whichhas positive focal power, wherein the object side surface and the image side surface are convex surfaces; a sixth lens, which has negative focal power, wherein the object side surface is a convex surface near the optical axis, and the image side surface is a concave surface near the optical axis. The infrared confocal wide-angle lens meets the conditional expressions that FOV is larger than or equal to 160 degrees and smaller than or equal to 180 degrees, and f / TTL is larger than 0.2 and smaller than 0.3, wherein FOV represents the maximum field angle of the infrared confocal wide-angle lens, f represents the effective focal length of the infrared confocal wide-angle lens, and TTL represents the distance from the object side face of the first lens to the imaging face on the optical axis.

The present invention relates to a telecentric F-theta optical lens and an optical system; the optical lens comprises a first lens, a second lens, a third lens and a four lens, which are arranged in sequence along an incidence direction; the first lens is a double concave negative lens; the second lens is meniscus positive lens with a curved surface toward the incidence side; the third lens is a plane convex positive lens or a double convex positive lens; the fourth lens is a convex plate positive lens or a double convex positive lens. Besides, preferably the optical power of each lens and the system optical power of the optical lens satisfy that: f1 / fw is more than -0.65 and less than -0.55, f2 / fw is more than 1.6 and less than 2.5, f3 / fw is more than 0.8 and less than 1.2, f4 / fw is more than 2.2 and less than2.5, wherein, f1, f2, f3 and f4 are the optical powers of the first lens, the second lens, the third lens and the fourth lens respectively; fw is the system optical power of the optical lens; by arranging the four lenses to be a 'negative-positive-positive-positive' separated optical power system, the exit pupil position of the F-theta optical lens is positioned at an afocal position, and the image main light in the field of view is parallel mutually and perpendicular to the imaging surface. Besides, the astigmatism and the field curvature of the system are regulated perfectly, the imaging on the whole field of view is uniform, and no vignetting exists.

This invention discloses a kind of projection object lens, concretely relates to a kind of projection object lens that projects the object which is composed of image element to the screen to image, it is applicable for the thin large screen back projection TV such as DMD,LCOS image element plate. Its object front group [U1] is negative power; it is composed of a meniscus negative PMMA single-side non-spherical surface lens [L1] and the glass lens [L2,L3] whose focal power are positive and negative; its object back group [U2] is positive power; it is composed of a group of lens [L4-L9]whose focal power are positive, positive, negative, negative, positive, positive; the first positive lens [L4] is double convex thick lens; the last positive lens [L9] is PMMA material single-side non-spherical surface lens, the other are all glass lens. This object lens make TV realize that the machine is light and thin, large screen, high definition, and more close structure, and the material of the lens are common optical materials; it can reduce the produce cost, and has wide market foreground.

The invention relates to an ultra-low distortion large viewing field telecentric optical system. The ultra-low distortion large viewing field telecentric optical system comprises a first negative lens, a first positive lens, a second negative lens, a diaphragm, a third negative lens, a second positive lens and a third positive lens which are sequentially arranged on the same optical path. The ultra-low distortion large viewing field telecentric optical system can meet the requirements of a positioning system on high precision and illumination uniformity in different viewing fields, has uniform dispersion in various viewing fields and can ensure that the lenses do not have vignetting.

The invention relates to a prime lens. The prime lens comprises a first lens group with positive focal power, a diaphragm and a second lens group with positive focal power sequentially from an objectsurface side to an image surface side, wherein the fist lens group comprises a first lens with negative focal power, a second lens with positive focal power, a third lens with negative focal power anda fourth lens with positive focal power; and the second lens group comprises a fifth lens with negative focal power, a sixth lens with positive focal power, a seventh lens with positive focal power and an eighth lens with positive focal power. The prime lens has imaging capability up to 8M pixel, can be applied to near ultraviolet imaging, can be applied to imaging in the visible light waveband range, does not have obvious purple boundary and chromatic dispersion and has clear and bright image quality. The integral relative illumination of the camera lens reaches more than 90 percent, the imaging uniformity is achieved, dark corners do not exist at the periphery, and the optical distortion of the camera lens is controlled to be within 1 percent.

The invention relates to the technical field of lenses, and discloses an optical lens for projecting light rays to a measured object from a light source. The direction facing the light source is an image side, and the direction facing the measured object is an object side. The optical lens sequentially comprises a first lens, a second lens and a third lens along an optical axis from the object side to the image side. Each of the first lens, the second lens and the third lens comprises an object side surface and an image side surface, wherein the object side surface facing the object side allows imaging light rays to pass through, and the image side surface facing the image side also allows the imaging light rays to pass through. The first lens made of a glass material is a convex-concave lens with a positive refractive index. The second lens is a concave-concave lens with a negative refractive index. The third lens is a convex-convex lens with a positive refractive index. The second lens and the third lens are aspherical lenses made of plastic materials. The optical lens has the advantages of small temperature-dependent variation in focal length and image quality, high system stability, small distortion, high relative illumination and small system size.

The invention relates to an infrared array type camera which comprises a camera, a video coding / decoding module, a control module, a communication module, a power management module, a temperature control module, an infrared night vision lighting module, a power supply and the like. The camera is connected with an input end of the video coding / decoding module, an output end of the video coding / decoding module is connected with an input end of the control module, an output end of the control module is connected with the communication module, and the power supply is used for supplying power to all other modules through the power management module. The infrared array type camera is capable of achieving automatic temperature adjustment.

The invention discloses a tubular lens of an image recognition system. The tubular lens is used for cooperating with an object lens; the focal distance of the tubular lens is f; the tubular lens comprises a first lens group, a second lens group and a third lens group; a diaphragm can be flexibly arranged; the focal distance of the first lens group f1 is greater than 0.7f, but smaller than 1.2f, and the effective clear aperture of the first lens group is greater than 0.1f; the focal distance of the second lens group f2 is greater than 0, but smaller than 0.2f; the focal distance of the third lens group f3 is greater than -5f, but smaller than -2f; an interval between the first lens group and the second lens group on an optical axis is smaller than 0.05f; an interval between the second lens group and the third lens group on the optical axis is greater than 0.25f. According to the tubular lens, the first lens group adopts a lens made of a material with large clear aperture and high refractivity as a light beam constraining lens, so that a large-visual field light beam under a large interval can be effectively constrained; furthermore, the second lens group and the third lens group can compensate and optimize light rays, so that aberration is corrected and an image space visual field is controlled, and thus the requirement of high-quality imaging, in which the interval can be increased and the lens can be varied, is ultimately met.

The invention discloses a visual endoscope for veterinary use. The visual endoscope comprises an inserting pipeline, a front-end component, a sampling pipeline, a handle, a memory display device and arear-end component, wherein the inserting pipeline is a hard pipeline, and a hollow channel, which is provided with the sampling pipeline therein, is formed in the inserting pipeline, and both the inserting pipeline and the sampling pipeline are connected to the front-end component and the rear-end component; a shooting suite is arranged in the front-end component; a camera and LED lamps are arranged in the shooting suit; and the memory display device is arranged at the upper side of the rear end of the inserting pipeline via a bracket. Meanwhile, the invention discloses a making method of the visual endoscope for veterinary use. The visual endoscope provided by the invention that the front-end component is 2.2cm in diameter, can easily enter such parts as vagina, cervical orifice and thelike of an animal, without causing injuries in the body of the animal; via the LED lamps in the front-end component, optimum light for conducting shooting within an effective shooting distance can beoffered, so that real and clear images are guaranteed; and secretions can be conveniently and precisely collected via the sampling pipeline when the parts such as the vagina, the cervical orifice andthe like of the animal accept examination.

The invention discloses a tubular lens of an image recognition system. The tubular lens is used for cooperating with an object lens; the focal distance of the tubular lens is f; the tubular lens comprises a first lens group, a second lens group and a third lens group; a diaphragm can be flexibly arranged; the focal distance of the first lens group f1 is greater than 0.7f, but smaller than 1.2f, and the effective clear aperture of the first lens group is greater than 0.1f; the focal distance of the second lens group f2 is greater than 0, but smaller than 0.2f; the focal distance of the third lens group f3 is greater than -5f, but smaller than -2f; an interval between the first lens group and the second lens group on an optical axis is smaller than 0.05f; an interval between the second lens group and the third lens group on the optical axis is greater than 0.25f. According to the tubular lens, the first lens group adopts a lens made of a material with large clear aperture and high refractivity as a light beam constraining lens, so that a large-visual field light beam under a large interval can be effectively constrained; furthermore, the second lens group and the third lens group can compensate and optimize light rays, so that aberration is corrected and an image space visual field is controlled, and thus the requirement of high-quality imaging, in which the interval can be increased and the lens can be varied, is ultimately met.

The invention discloses a seamless splicing imaging photoelectric system based on double lenses and nine surface array detectors. The seamless splicing imaging photoelectric system has two imaging system structure and adopts a prism beam splitting mode; imaging of eight surface array detectors is realized on a first lens, wherein four surface array detectors are arranged on a main image surface and four surface array detectors are arranged on four side image surfaces respectively; imaging of the last surface array detector is realized on a second lens; and the two imaging systems and the surface array detectors are combined together to realize image surface seamless splicing formed by the nine surface array detectors in a 3*3 mode. A beam splitting prism is a combination of a rectangular pyramid and four half rectangular pyramid mirrors; and a beam splitting surface realizes beam splitting in a semi-transparency and semi-reflection manner, so that equivalent beam splitting is realized, and spliced vignetting of the surface array detectors can be eliminated. The seamless splicing imaging photoelectric system can be applied to aviation and aerospace optical imaging devices and optical detectors as well as equipment, in particular to aviation and aerospace mapping cameras of large-view-field ultra-large surface array detectors.

The invention discloses an optical imaging lens, and the lens 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 the object side to the image side along the optical axis, the object side surface and the image side surface of the second lens are convex surfaces; a diaphragm; the object side surface and the image side surface of the third lens are convex surfaces; the fourth lens has negative focal power, the object side surface of the fourth lens is a concave surface, and the third lens and the fourth lens form a balsaming lens; the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface; and the sixth lens has positive focal power, and the object side surface of the sixth lens is a convex surface. The optical imaging lens has the advantages of low dispersion, high relative illumination and low production cost.

The invention provides an infrared confocal wide-angle lens, comprising six lenses in total, which sequentially comprise from the object side to the imaging surface along the optical axis: a first lens with negative refractive power, the object side is convex, and the image side is concave; A second lens with a power that is concave on the object side and convex on the image side; a stop; a third lens with positive power that is convex on both the object and image sides; a fourth lens with negative power , its object side and image side are both concave; the fifth lens with positive power, its object side and image side are both convex; the sixth lens with negative power, its object side is convex at the near optical axis , the image side is concave at the near optical axis; the infrared confocal wide-angle lens satisfies the conditional formula: 160°≤FOV≤180°, 0.2<f / TTL<0.3, where: FOV represents the maximum field of view of the infrared confocal wide-angle lens, f Indicates the effective focal length of the infrared confocal wide-angle lens, and TTL indicates the distance from the object side of the first lens to the imaging plane on the optical axis.

The invention discloses a lens shadow correction method for imaging a camera into a circular picture, which specifically comprises the following steps of: dividing an imaging circle into a central circle and fan-shaped regions surrounding the central circle, correcting the color and the brightness of each fan-shaped region by taking the color and the brightness of the central circle as references, and enabling the color correction gain to be the color of the central circle / the color of the fan-shaped regions, the brightness correction gain is the brightness of the center circle / the brightness of the fan-shaped region. According to the method, the shadow compensation area is divided for the circular imaging picture by adopting a mode of adding the central circle and the sector area, and color compensation and brightness compensation are adopted for the shadow area, so that the color and the brightness of the circular picture are uniform, no dark corner exists around the image, and the image effect is improved.

The achromatic and distortion-free relay imaging system of a snapshot imaging spectrometer relates to the technical field of snapshot imaging spectroscopy, and solves the problems of severe distortion of the infrared optical system, lack of achromatic ability, and large volume and weight in the existing snapshot imaging spectrometer. From left to right along the propagation direction of the optical path, it includes step microreflectors, light beam splitters, light compensation plates, relay imaging lenses, detector windows, detector cold diaphragms and detector arrays; Central optical path design, the use of germanium and silicon materials and focal power matching together to achieve system achromatism, the edge illumination of the image plane corresponding to the large field of view is close to 90%, the transfer value at 17lp / mm is close to the diffraction limit, and the image plane is distorted Less than -0.025%, the depth of field of the system meets the requirements of the spectrometer system. Design results: when imaging with different step heights, the maximum change of the MTF value of the system does not exceed 0.01. The relay system achieves 100% cold aperture matching, avoiding stray light and cold Reflection effects without vignetting.

The invention discloses a retina imaging optical system with high resolution and coaxial illumination, comprising a first lens group, a second lens group, a third lens group and a photosensitive chip, wherein the first lens group, the second lens group, the third lens group and the photosensitive chip are sequentially arranged from an objective direction to a lens direction by a common optical shaft; a diaphragm is arranged between the second lens group and the third lens group; and a semitransparent reflective mirror, which is used for transmitting part of rays and reflecting part of rays and forms an angle of 45 degrees with the optical shaft, is arranged between a first lens and a second lens in the first lens group, close to the objective direction. An illumination light path is arranged aside an imaging optical shaft, wherein the rays are reflected into the reflective mirror through a 45-degree reflective mirror surface. The invention provides the optical system with the characteristics of high resolution, large drawing angles, automatic focusing, convenient movement and coaxial illumination.

The invention discloses a projection objective lens, in particular to a projection objective lens for projecting an object composed of pixels onto a screen for imaging. Its objective lens front group [U1] is negative refractive power, which is composed of a meniscus-shaped negative film PMMA single-sided aspheric lens [L1] and glass lenses [L2, L3] with positive and negative refractive powers respectively; its objective lens The rear group [U2] is positive refractive power, which is composed of a group of lenses [L4~L9] with positive, positive, negative, negative, positive and positive respectively, among which, the first positive lens [L4] is double Convex thick lens; the last positive lens [L9] is a single-sided aspherical lens made of PMMA material, and the others are all glass lenses. The objective lens has a more compact structure while enabling the TV to achieve light and thin body, large screen, and high definition, and the materials used for the lens are all common optical materials, which can effectively reduce production costs and have broad market prospects .

The invention relates to a wide-aperture optical lens for laser, comprising a lens group and a diaphragm positioned in front of the lens group, wherein the lens group includes three lenses which are a first lens, a second lens and a third lens and are sequentially distributed into a negative-positive-positive separation focal power system, wherein the first lens is a negative lens in a curved moon shape, and the curved surface of the first lens is curved towards the direction of the diaphragm; the second lens and the third lens are both positive lenses in the curved moon shape, and the curvedsurfaces of the second lens and the third lens are also curved towards the direction of the diaphragm; and the ratio of the focal power of the lenses to the focal power of the focal power system accords with the following requirements: -0.5<f1 / fw<-0.4, 0.55<f2 / fw<0.65 and 0.8<f3 / fw<1. Compared with a common f(theta) lens for the laser with same focal length, the relative aperture and the light pass diameter of the wide-aperture optical lens are 2-3 times longer than those of the common f(theta) lens for the laser, and the longest light pass diameter of the wide-aperture optical lens can reach30 mm; and in addition, the wide-aperture optical lens has large required view field and long focal length.