121 results about "Fixed-focus lens" patented technology

The prime lens comprises a first lens with negative focal power, a second lens with positive focal power, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens with positive focal power and a sixth lens with negative focal power which are sequentially arranged from an object space to an image space along an optical axis, a diaphragm of the prime lens is located between the second lens and the third lens. By adopting the technical scheme, the focal power of each lens can be reasonably distributed, so that the transmission process of light rays in the prime lens is more stable, and the light rays are prevented from being excessively deflected on a certain lens surface, thereby effectively correcting high-order aberration, avoiding introducing larger aberration, ensuring small aperture and low chromatic aberration, and simultaneously improving the imaging quality of the prime lens. Advanced aberration is further corrected, and higher imaging quality is achieved.

The embodiment of the utility model discloses a prime lens, which comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged from an object space to an image space along an optical axis, the first lens has negative focal power, the second lens has positive focal power, the third lens has positive focal power, and the fourth lens has negative focal power; the object space surfaces and the image space surfaces of the first lens, the third lens and the fourth lens are aspheric surfaces; the object-side surface of the second lens is an aspheric surface, and the image-side surface is a binary diffraction surface. In the embodiment of the utility model, the four optical lenses are adopted, and the focal power of each lens element and the relative position of each lens element are optimized, so that the design of the prime lens which is large in aperture, compact in structure and capable of meeting the imaging requirement is finally realized; the aperture of the prime lens is 1.4, the total optical length is not larger than 22.5 mm, the prime lens can be matched with a 1 / 2.7 ''sensor chip, and the comprehensive performance of the prime lens can meet the use requirement of a general sensor for security and protection monitoring.

The invention discloses a prime lens and a camera, and relates to the technical field of prime lenses, the prime lens is provided with an object side and an image side which are oppositely arranged along the optical axis direction, the prime lens comprises a first lens group, a second lens group, a third lens group and a fourth lens group which are sequentially arranged from the object side to the image side, and the four lens groups comprise eleven lenses, the first lens, the fourth lens, the seventh lens, the eighth lens and the tenth lens have positive focal power; the second lens, the third lens, the fifth lens, the sixth lens, the ninth lens and the eleventh lens have negative focal power; wherein the third lens group is movably arranged along the extension direction of the optical axis and is used for focusing, so that the aperture number of the prime lens is adjustable in a range of 1.6-2.0, the variation range of a field angle is less than 5%, and the distortion degree of the prime lens is less than 3%. According to the technical scheme provided by the invention, the technical effects of large aperture and stable imaging are achieved through the arrangement and combination of the eleven lenses and the design of the lenses.

The utility model discloses a prime lens comprising 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 which are arranged from an object plane to an image plane along an optical axis. The first lens is a negative focal power lens, the second lens is a negative focal power lens, the third lens is a positive focal power lens, the fourth lens is a positive focal power lens, the fifth lens is a negative focal power lens, the sixth lens is a positive focal power lens, and the seventh lens is a negative focal power lens. The eighth lens is a positive focal power lens; and the third lens or the fourth lens is a glass aspheric lens. According to the technical scheme, the number of the lenses, the focal power matching mode and the surface type matching mode are reasonably set, and the design of the fixed-focus lens which is large in aperture, small in size and capable of being confocal day and night can be achieved.

The utility model discloses a machine vision prime lens with an improved structure and a focal length of 35mm, which comprises a first lens, a second lens arranged on the right side of the first lens, a third lens arranged on the right side of the second lens, a fourth lens arranged on the right side of the third lens, and a diaphragm arranged between the fourth lens and the third lens. A fifth lens is arranged on the right side of the fourth lens, an imaging surface is arranged on the right side of the fifth lens, the focal length of the first lens is G1, the focal length of the fourth lens is G4, the focal length of the lens is f, and the optical system meets the relational expression 0.8 lt; g1 / flt; 1.3, 0.6 lt, 1.3, 0.6 lt; g4 / flt; and 0.8. The utility model has the advantages of novel design, simple structure, simple and convenient assembly, low cost, good optical performance, clear imaging and high resolution, and can realize the change of the object distance from 0.1 m to infinity.

The utility model discloses an ultra-wide-angle prime lens with large light transmission and high resolution and electronic equipment. The lens is sequentially provided with a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object plane to an image plane along an optical axis. The first lens has negative diopter, the object side surface of the lens is a convex surface, and the image side surface of the lens is a concave surface; the second lens has negative diopter, the object side surface of the lens is a concave surface, and the image side surface of the lens is a convex surface; the third lens has positive diopter, the object side surface of the lens is a convex surface, and the image side surface of the lens is a plane or a convex surface; the fourth lens has positive diopter, the object side surface of the lens is a convex surface, and the image side surface of the lens is a convex surface. According to the utility model, the effective focal length is 2.53 mm, the F is 1.6, and the distortion result is 1t; the ultra-wide-angle imaging lens is small in size, large in clear aperture, confocal in day and night, high in resolution and excellent in performance in high and low temperature environments.

The application discloses a fixed-focus lens, which comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence along an optical axis from an object plane to an image plane; the first lens has negative optical power, the second lens has positive optical power, the third lens has positive optical power, the fourth lens has positive optical power, and the fifth lens has negative optical power; wherein the optical aperture D of the first lens and the total length TTL of the optical system of the fixed-focus lens satisfy 0.1<=D / TTL<=0.5. The technical scheme of the application can realize a large field angle range and meet the requirements of miniaturization and small aperture.

The application provides a wide-angle fixed focus lens, and relates to the technical field of optical lenses. The wide-angle fixed focus lens provided by the application comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens arranged in sequence along an optical axis from an object side to an image side; the fourth lens, the fifth lens and the eighth lens have positive refractive powers, and the seventh lens has a negative refractive power; the wide-angle fixed focus lens further comprises a diaphragm, and the diaphragm is located between the fourth lens and the fifth lens. The wide-angle fixed focus lens provided by the application can realize a wide-angle fixed focus lens with a small aperture and high image quality.

The utility model provides an infrared prime lens for an unmanned aerial vehicle. The infrared prime lens comprises a first lens, a diaphragm, a second lens, a window and a detector which are sequentially arranged from an object side to an image side, the first lens has negative focal power, the second lens has positive focal power, the object side surface and the image side surface of the first lens are a convex surface and a concave surface in sequence, and the object side surface and the image side surface of the second positive lens are convex surfaces. The infrared prime lens provided by the utility model meets the requirement of infrared thermal imaging, effectively controls the cost and weight of the lens, and is suitable for being carried by an unmanned aerial vehicle.

The invention discloses an inner wall defect panoramic imaging detection microscope and a detection method thereof.The microscope comprises an imaging mechanism, a light transmission mechanism and a 30-degree annular illumination light source, and illumination light beams of the 30-degree annular illumination light source irradiate a local annular area of the inner wall of a cavity to be detected; a reflected light beam or a scattered light beam in the area is reflected by a right-angle conical reflecting mirror in the light transmission mechanism, enters a hollow light tube in the light transmission mechanism, is transmitted to a prime lens and is received by an area-array camera; the microscope is controlled by an external system to move along the central axis of the inner wall of the to-be-detected cavity, and images are acquired by using the area-array camera, so that panoramic images of all areas of the inner wall of the to-be-detected cavity are scanned, and the detection of the defects of the inner wall of the to-be-detected cavity is completed. When the diameter of the inner wall of the to-be-detected cavity is changed, an external driving controller is used for controlling an imaging module in the imaging mechanism to move, so that the initial object distance is recovered, and panoramic imaging detection of the inner wall defect of the to-be-detected cavity with the changed inner wall diameter is realized.

The embodiment of the invention provides a zooming method and device, electronic equipment and a storage medium, and relates to the technical field of image processing, and the specific scheme is as follows: if an adjusted first zooming magnification is within a first zooming magnification range corresponding to a first fixed-focus lens, according to a preset corresponding relation between the zooming magnification and an exposure area, the exposure area of the first fixed-focus lens is within a first zooming magnification range corresponding to the first fixed-focus lens; determining a first exposure area corresponding to the first zoom magnification, wherein the first prime lens is a lens in a working state in prime lenses integrated by the image acquisition equipment; and controlling the first fixed-focus lens to expose a first exposure area in the view field range of the first fixed-focus lens to obtain a zoomed image corresponding to the first zoom ratio. By applying the scheme provided by the embodiment of the invention, the zooming function can be realized based on fixed focus, and the accuracy of the brightness of the acquired image is improved.

The utility model discloses a projector lens module with an interchangeable lens optical structure, which comprises a fixed cylinder, a mounting plate is arranged on the fixed cylinder, and the fixed cylinder is fixedly mounted; the movable lens barrel is movably installed in the fixed barrel, and the movable lens barrel and the fixed barrel are in spiral connection through a spiral structure. According to the projector lens module with the interchangeable lens optical structure provided by the utility model, the telescopic focusing of the lens is realized through the spiral structure, the requirements of different projection distances and scenes can be met, the focusing range is wide, and the focusing precision is high. Meanwhile, due to the design of the lens module, the optical structure can be conveniently and rapidly disassembled and replaced, the cheap prime lens can also adapt to different application scenes, and the use flexibility and economic applicability of equipment are greatly improved.

The application discloses a fixed focus lens, comprising: a first lens with negative refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a diaphragm, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, a seventh lens with positive refractive power, and an eighth lens with negative refractive power arranged in sequence along an optical axis from an object side to an image side; wherein the fifth lens and the sixth lens are cemented; the first lens, the fourth lens, the fifth lens, and the sixth lens are all glass spherical lenses, and the second lens, the third lens, the seventh lens, and the eighth lens are all plastic aspherical lenses. The 4G4P combination can well correct aberration, reduce distortion, ensure good image quality, improve resolution, and the total optical length is less than or equal to 15 mm.

Device for estimating the three-dimensional structure of teeth inside a mouth, comprising : - a central control unit, - a tray insertable inside the mouth, - a plurality of independent cameras arranged on the tray, each camera being equipped with a corresponding fixed focus lens, having a corresponding field of view and being designed to capture a corresponding image of the teeth within the field of view and to transmit the image to the central control unit, each image being composed by a plurality of pixels, and - illumination means arranged on the tray and designed to illuminate the fields of view of the cameras, wherein the central control unit is programmed to estimate the three-dimensional structure of the teeth by estimating independently for each image a depth value for each pixel thereof.

The utility model relates to the technical field of camera shooting, in particular to a variable image distance lens and an irradiation-resistant camera, and the variable image distance lens mechanism comprises an outer ring; the lens group is movably arranged in the outer ring; and the adjusting assembly is used for driving the lens group to do linear motion so as to adjust the distance between the lens group and the image sensor. According to the camera, an existing prime lens is improved and can move, the distance between the lens piece and the light receiving COMS sensor is changed, namely, the image distance of the lens is changed, so that clear observation of objects at different distance levels is achieved, and then the camera can have the advantages of being resistant to vibration, large in observation range and the like at the same time.

The prime lens comprises a first lens group and a second lens group which are sequentially arranged from an object plane to an image plane along an optical axis, the first lens group is used for focusing; the first lens group 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 plane to the image plane along the optical axis; the second lens group comprises an eighth lens and a ninth lens which are sequentially arranged from the object plane to the image plane along the optical axis; the first lens is a negative-focal-power lens, the second lens is a positive-focal-power lens, the third lens is a negative-focal-power lens, the fourth lens is a negative-focal-power lens, the fifth lens is a positive-focal-power lens, the sixth lens is a positive-focal-power lens, the seventh lens is a positive-focal-power lens, the eighth lens is a negative-focal-power lens, and the ninth lens is a positive-focal-power lens. According to the technical scheme of the invention, a prime lens with large aperture, wide object distance, low distortion and high resolution can be realized, and the use requirements of industrial lenses can be met.

The utility model discloses an ultra-large aperture prime lens, and relates to the technical field of prime lenses. Comprising a lens cone and a prime lens body, a fixed sleeve is fixedly arranged outside the prime lens body, a movable sleeve is movably arranged outside the prime lens body and located on the right side of the fixed sleeve, a rack is fixedly arranged on one side of the movable sleeve, and mounting blocks are fixedly arranged at the top and the bottom of the prime lens body. A gear is fixedly arranged on the surface of the mounting block, the gear is fixedly connected with a connecting rod, two protection plates are fixedly arranged at one end of the connecting rod, fixing plates are fixedly arranged on one sides of the two protection plates, a pull rod is movably arranged in one fixing plate, and a pull rod is movably arranged in the other fixing plate. The pull rod is sleeved with a second spring, one end of the pull rod is fixedly provided with a clamping block, and the clamping block is movably connected with the other fixing plate.

The embodiment of the application discloses a fixed focus lens, which comprises 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 arranged in sequence along an optical axis from an object plane to an image plane; the first lens is a negative focal length lens, the second lens is a negative focal length plastic aspheric lens, the third lens is a positive focal length plastic aspheric lens, the fourth lens is a positive focal length glass lens, the fifth lens is a positive focal length plastic aspheric lens, the sixth lens is a negative focal length plastic aspheric lens, the seventh lens is a positive focal length plastic aspheric lens, and the eighth lens is a positive focal length plastic aspheric lens. By adopting the technical scheme, the fixed focus lens comprises eight lenses, the focal lengths and surface shapes of the lenses are reasonably distributed, the design of the fixed focus lens with excellent comprehensive performance which takes into account imaging requirements and compact structure is finally realized, and the comprehensive performance meets the use requirements of a general sensor of security monitoring.

The utility model provides a large-aperture short-focus infrared prime lens. The large-aperture short-focus infrared prime lens comprises a first lens, a diaphragm, a second lens, a third lens, a window and a detector which are sequentially arranged from an object side to an image side, the first positive lens is a biconvex surface, the object side surface and the image side surface of the second positive lens are a concave surface and a convex surface in sequence, and the object side surface and the image side surface of the third positive lens are a concave surface and a convex surface in sequence; the first lens is a spherical lens with positive focal power, the second lens is an aspherical lens with positive focal power, and the third lens is a spherical lens with positive focal power. The infrared prime lens provided by the utility model has a large aperture and a compact structure, meets the infrared imaging requirement, and effectively controls the weight and cost of the lens.

The application discloses a glass-plastic hybrid lens, which comprises a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a protective glass sheet and an imaging surface in sequence from an object side to an image side along an optical axis, wherein the first lens is a double-concave lens, the second lens is a double-convex lens, the third lens is a double-convex lens, and the fourth lens is a double-concave lens; the optical interval between the first lens and the second lens is 6.88 mm, the optical interval between the second lens and the third lens is 2.58 mm, the optical interval between the third lens and the fourth lens is 0.13 mm, and the optical interval between the fourth lens and the imaging surface is 5.68 mm; the focal length f of the lens is 3.70 mm, the focal length f1 of the first lens is -5.65 mm, the focal length f2 of the second lens is 9.20 mm, the focal length f3 of the third lens is 3.92 mm, and the focal length f4 of the fourth lens is -5.23 mm; and the technical scheme of the application improves the light throughput and temperature bearing capacity of the fixed-focus lens, so that the fixed-focus lens can shoot clear images in a relatively dark environment and in a high-low temperature environment.

This invention discloses a fixed-focus lens. The fixed-focus lens includes, arranged sequentially along the optical axis from object to image, a first lens with negative optical power, a second lens with negative optical power, a third lens with positive optical power, a fourth lens with positive optical power, an aperture stop, a fifth lens with positive optical power, a sixth lens with positive optical power, a seventh lens with negative optical power, an eighth lens with positive optical power, and a ninth lens with negative optical power. The first, third, and seventh lenses are all spherical glass lenses, the sixth lens is a glass aspherical lens, and the second, fourth, fifth, eighth, and ninth lenses are all plastic aspherical lenses. This invention achieves a low-cost fixed-focus lens design that balances imaging requirements and a compact structure. This fixed-focus lens can be matched with a 1 / 2.7″ imaging chip, meeting the requirements of small size, large field of view, and good center-to-edge resolution. Its overall performance meets the requirements for use in general-purpose security monitoring chips.

The invention relates to a small-sized low-cost CCTV wide-angle prime lens and an imaging method thereof, the small-sized low-cost CCTV wide-angle prime lens comprises an optical system, and the optical system is composed of a first lens, a second lens, a diaphragm, a third lens and a fourth lens which are sequentially arranged from left to right along a light incident light path; the first lens is a meniscus concave negative lens, the second lens is a biconvex positive lens, the third lens is a biconvex positive lens, and the fourth lens is a biconcave negative lens. The optical lens is simple in structure and reasonable in design, the optical structure that one glass lens is matched with three plastic lenses is adopted, the advantage of aberration correction of the aspherical lens is fully played, high-definition imaging is met, meanwhile, the optical lens has the smaller outer diameter of the lens and the shorter optical total length, miniaturization of the lens is guaranteed, and higher optical performance stability is achieved; and meanwhile, the cost is reduced while the system adapts to the environment, and the system has the advantages of relatively high imaging definition, large clear aperture, relatively low tolerance sensitivity, relatively good high and low temperature stability and the like, and can monitor a target more comprehensively.

This invention relates to a wide-angle fixed-focus lens, which, along the optical axis from the object side to the image side, sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens, wherein the first lens, the third lens, and the eighth lens have negative optical power, the second lens, the fourth lens, the fifth lens, and the ninth lens have positive optical power, and the sixth lens and the seventh lens have opposite optical powers.

The invention provides an internal focusing type micro-single prime lens, which comprises a first lens group with positive focal power, a second lens group with positive focal power, a third lens group with negative focal power and a fourth lens group with positive focal power which are sequentially arranged from an object space to an image space along an optical axis, and is characterized in that the third lens group is a focusing lens group; the first lens group 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 space to the image space along the optical axis; the second lens group comprises an eighth lens, a ninth lens, a tenth lens and an eleventh lens which are sequentially arranged from the object space to the image space along the optical axis; the third lens group comprises a twelfth lens and a thirteenth lens which are sequentially arranged from the object space to the image space along the optical axis; the fourth lens group includes a fourteenth lens. According to the embodiment of the invention, a large-aperture, high-resolution and full-frame micro-single short-focus lens with a focal length of 14 mm is realized, and the cost of a focusing micro-single fixed-focus lens is reduced.

The application provides a kind of super wide angle fixed focus lens, relating to optical lens technical field.Super wide angle fixed focus lens includes negative power first lens, negative power second lens, positive power third lens, positive power fourth lens, negative power fifth lens, positive power sixth lens and positive power seventh lens arranged in order along optical axis from object side to image side;It also includes diaphragm, and the diaphragm is located between the third lens and the fourth lens.The embodiment of the application provides a kind of super wide angle fixed focus lens, in the case of having large field angle, miniaturization is still adapted to large target chip, more chip types can be compatible, and day and night can be focused, can meet the use demand in more situations.

The utility model relates to medical instrument technical field especially, more particularly to a kind of automatic focusing lens mount and endoscope equipment, the automatic focusing lens mount includes: lens barrel, fixed focus lens group and focusing lens group are separately provided in lens barrel inside along the axial direction of lens barrel;Drive module, drive module includes motor and drive circuit, motor is used to drive focusing lens group and move along the axial direction of lens barrel, to make focusing lens group close or away from fixed focus lens group;Drive circuit is connected with camera mainframe and motor respectively, drive circuit is used to receive focusing signal sent by camera mainframe, and focusing signal is converted into drive signal transmission to motor and drives.Compared with the existing need user manual adjustment focusing lens mount to complete focusing, the utility model can be focused by motor, and user experience is improved.

The present invention provides a wide-angle fixed-focus lens, which relates to the technical field of optical lenses. The wide-angle fixed-focus lens provided in an embodiment of the present invention includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens, arranged in sequence along the optical axis from the object side to the image side; the first lens and the second lens have negative optical power; the third lens and the fourth lens have positive optical power; the wide-angle fixed-focus lens also includes an aperture, which is located between the third lens and the fourth lens. The embodiment of the present invention provides a wide-angle fixed-focus lens to achieve a small aperture and high image quality wide-angle fixed-focus lens.

The prime lens comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens which are sequentially arranged from an object space to an image space along an optical axis, the first lens is a glass spherical lens with negative focal power, the second lens is a plastic aspheric lens, the third lens is a plastic aspheric lens with positive focal power, the fourth lens is a plastic aspheric lens with positive focal power, the fifth lens is a plastic aspheric lens with negative focal power, and the sixth lens is a plastic aspheric lens with negative focal power. The sixth lens is a plastic aspheric lens with positive focal power, the seventh lens is a plastic aspheric lens with negative focal power, the eighth lens is a plastic aspheric lens with positive focal power, and the ninth lens is a plastic aspheric lens. According to the invention, a 1G8P lens combination is adopted, the low-cost and large-view-field-range lens design which gives consideration to the imaging requirement and the compact structure is realized, and the security and protection monitoring universality requirement can be met.

The present invention relates to a fixed-focus lens, comprising: a first lens (L1) with negative optical power, a second lens (L2), a stop (STOP), a third lens (L3), a fourth lens (L4) with positive optical power, a fifth lens (L5) with negative optical power, a sixth lens (L6) with positive optical power, and a protective plate glass (CG), arranged in sequence along an optical axis from the object side to the image side. The optical power of the second lens (L2) is negative or positive, and the optical power of the third lens (L3) is positive or negative. The effective focal length (f3) of the third lens (L3) and the effective focal length (f4) of the fourth lens (L4) satisfy the relationship: 50≤f3 / f4≤13.3. The lens combines high pixel count, small size, and low cost. It does not experience defocusing within a temperature range of 40°C to 80°C and can be used both day and night. It has a resolution of 8 million pixels and can capture images with a maximum field of view of 136°.

The invention relates to the field of optics, in particular to a prime lens and an imaging device, and the prime lens is sequentially composed of a first lens group with negative focal power and a second lens group with positive focal power from an object plane side to an image plane side; each of the first lens group and the second lens group at least comprises two groups of bonding lenses; the prime lens satisfies the following conditional expressions: f is more than 10mm and less than 20mm; fno is less than 1.2; wherein f is the focal length of the prime lens, and fno is the aperture number of the prime lens. Through the limitation of the parameters and the structure, on the basis of realizing the large aperture of the medium-magnification prime lens, the spherical aberration and the chromatic aberration of the prime lens can be reduced through the arrangement of the bonding lens, and the resolving power of the prime lens is increased.