73 results about "Fixed-focus lens" patented technology

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 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 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 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.

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 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 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 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, an eighth lens, a ninth lens, a tenth lens and an eleventh lens arranged in sequence along an optical axis from an object plane to an image plane; the first lens, the second lens, the third lens, the fifth lens, the eighth lens and the eleventh lens are negative-power lenses; the fourth lens, the sixth lens, the seventh lens, the ninth lens and the tenth lens are positive-power lenses; the third lens comprises a third object-side surface close to the object plane and a third image-side surface close to the image plane, the third object-side surface is a concave surface, and the third image-side surface is a convex surface; and the fourth lens comprises a fourth object-side surface close to the object plane, and the fourth object-side surface is a convex surface. The above technical scheme can realize at least one beneficial effect, such as excellent imaging, large light incidence, large target surface, wide angle and the like.

The present application relates to a kind of fixed focus lens, in the direction of optical axis from object side to image side, it includes successively: the first lens (L1) of negative power, the second lens (L2) of positive power, the third lens (L3) of positive power, diaphragm (STO), the fourth lens (L4) of positive power, the fifth lens (L5) of negative power, the sixth lens (L6) of positive power, the seventh lens (L7) of positive power and the eighth lens (L8) of negative power, the shape of object side of the fifth lens (L5) is concave, the sixth lens (L6) is convex convex lens, the eighth lens (L8) is near-axis area concave convex lens.This fixed focus lens has the characteristics of large target surface, super large aperture, large light quantity, low cost, miniaturization and high imaging performance, and the image is clear in the temperature range of-40 ℃~+80 ℃.

The prime lens 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, a tenth lens and an eleventh lens which are sequentially arranged from an object plane to an image plane along an optical axis, the first lens, the second lens, the third lens, the fifth lens, the eighth lens and the eleventh lens are all negative focal power lenses, and the fourth lens, the sixth lens, the seventh lens, the ninth lens and the tenth lens are all positive focal power lenses. The third lens comprises a third object side surface close to one side of the object plane and a third image side surface close to one side of the image plane, the third object side surface is a concave surface, and the third image side surface is a convex surface; the fourth lens comprises a fourth object side surface close to one side of the object surface, and the fourth object side surface is a convex surface. By adopting the technical scheme, at least one beneficial effect of excellent imaging, large light transmission, large target surface, wide angle and the like can be realized.

The application relates to the field of lens assisting, and discloses a focal length adjustable fixed focus lens assisting structure. In the application, a fixed outer frame is arranged, a focusing shell is rotatably connected to the inner surface of the fixed outer frame, a supporting groove is welded to the outer surface of the fixed outer frame, a reference plate is movably connected to the inner surface of the supporting groove, an adjusting shaft is rotatably connected to the inner surface of the reference plate, the outer surface of the adjusting shaft is meshedly connected with the focusing shell, a knob is fixedly connected to the outer surface of the end of the adjusting shaft away from the reference plate, the structure is clamped on a fixed focus lens focusing knob through the fixed outer frame, the focusing shell is clamped on the outer edge of the focusing knob through corresponding clamps, the corresponding clamping and fixing adjusting ring is rotated to drive the clamping plate to be extruded and fixed, so that the focusing shell and the focusing knob are integrated, the reference plate and the fixed plate are telescoped, the corresponding adjusting shafts of different diameters are meshed with the external clamping teeth of the focusing shell, when the knob is manually screwed, the corresponding speed reduction accurately drives the focusing shell to rotate, and further angle adjustment of the corresponding focusing knob is completed.

This application discloses an athermalized long-wavelength fixed-focus lens with an effective focal length of 4.5mm and an f-number of 1.0. The athermalized long-wavelength fixed-focus lens includes a first lens, a second lens, and a third lens arranged sequentially along the optical axis. The first lens is a meniscus negative lens with its convex surface facing the object side, the second lens is a meniscus positive lens with its convex surface facing the image side, and the third lens is a biconvex lens. All three lenses are made of chalcogenide glass. When the temperature of the athermalized long-wavelength fixed-focus lens is 20°C, the air gap between the first and second lenses is 6.45mm, and the air gap between the second and third lenses is 8.6mm. This athermalized long-wavelength fixed-focus lens has a small number of lenses, a simple and compact structure, and all lenses are made of chalcogenide glass, thus reducing costs while achieving passive athermalization. This application also discloses an imaging device.

The utility model discloses a wide-angle prime lens, which is suitable for a single electric camera and comprises three lens groups. The first lens group with the positive focal power comprises two meniscus negative lenses, a biconvex spherical positive lens, a first doublet lens and a biconvex spherical positive lens. And the second lens group with negative focal power comprises a biconcave spherical negative lens and a biconvex spherical positive lens, and can move during focusing. And the third lens group with positive focal power comprises a biconvex spherical positive lens, a second doublet lens, a third doublet lens, a biconcave spherical negative lens and a biconvex aspheric positive lens. The first doublet lens and the third doublet lens are basically symmetrical optically. The highest order of an even term of an aspheric expression of the wide-angle prime lens is 10.

The invention relates to an optical lens, in particular to a large-target-surface and wide-temperature self-adaptive long-wave infrared athermalization prime lens, and aims to solve the problems that an existing long-wave infrared prime lens is difficult to consider wide-temperature athermalization and large-target-surface imaging requirements, has obvious thermal defocus and is difficult to process. The optical system comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged in the propagation direction of incident light and all have positive refractive power. The first lens is a front-convex and rear-concave lens; the second lens is a front-convex and rear-concave lens; the third lens is a front-concave rear-convex lens and participates in thermal difference compensation; the fourth lens is a biconvex lens; the object side surface of the first lens, the object side surface of the second lens, the object side surface of the third lens and the image side surface of the fourth lens are even aspheric surfaces; the image side surface of the first lens, the image side surface of the second lens, the image side surface of the third lens and the object side surface of the fourth lens are spherical surfaces.

The invention provides a focusing device of an unmanned aerial vehicle based on a fixed focus lens and a control method and system. A prime lens in the device collects a real-time image; the Alwatt lens is composed of two liquid crystal geometric phase element sub-lenses with different phase distributions, can be transversely and relatively movably arranged, and is sequentially positioned behind the prime lens to adjust the focal length parameter of the prime lens; the light sensing unit is positioned behind the Alwatt lens, receives a light signal of the real-time image passing through the Alwatt lens, and converts the light signal into a video electric signal; and the edge computing device receives the video signal and decodes the video signal into image data, detects image blurring conditions through a YOLO algorithm, classifies the image blurring conditions, determines an adjustment mode according to a classification result, executes PID control according to the adjustment mode, and adjusts the transverse relative displacement of the two sub-lenses, so that an optical signal falling on the light sensing unit is an optical signal of a focused image. According to the invention, through cooperation of the YOLO algorithm and PID control, intelligent dynamic focusing of the prime lens of the unmanned aerial vehicle is realized.

The application discloses a kind of fixed focus lens, front lens group, diaphragm and rear lens group are sequentially arranged from object side to image side;Front lens group is sequentially arranged with the first lens, second lens and third lens with negative, negative, positive focal power from object side to image side;Rear lens group is sequentially arranged with the fourth lens, fifth lens, sixth lens and seventh lens with positive, negative, positive, positive focal power from object side to image side;Wherein, the fourth lens and the fifth lens are glued, form double glued lens.The fixed focus lens is composed of 7 lens elements, the number of lens is reasonable, simple and compact structure, the focal power and position of each lens element are reasonable, and the environmental adaptability is strong, the resolving power is high;The design of large field angle and large image height makes the lens system have greater competitiveness in the market.The fixed focus lens FNO is 2.50, the field angle is 138°, the imaging image height can match 1 / 1.8 inch chip, the optical total length is not more than 24.0mm, and the absolute value of optical distortion is less than 40%, to meet the super high definition imaging requirement.

The application discloses a fixed-focus lens, which comprises, in sequence from the object side to the image side along the optical axis, a first lens with positive refractive power, the object side of which is a convex surface; a second lens with refractive power; a third lens with refractive power; a fourth lens, the object side of which is a convex surface; a fifth lens with refractive power; and a sixth lens with negative refractive power, the object side and the image side of which are both concave surfaces, wherein the second lens and the third lens have opposite positive and negative refractive power; the image side of the first lens and the image side of the fifth lens are both convex or both concave; the effective focal length F6 of the sixth lens, the radius of curvature R61 of the object side of the sixth lens, and the radius of curvature R62 of the image side of the sixth lens satisfy: 1.6 mm <= |(R61+R62)*F6 / (R61-R62)| <= 3.49 mm.

The invention discloses an imaging system. The imaging system sequentially comprises a prime lens, a diaphragm, a pick-up lens and an imaging surface from an object side to an image side along an optical axis, from an object side to an image side along an optical axis, the prime lens sequentially comprises: a first lens having positive focal power; the second lens has positive focal power; the third lens has negative focal power; the fourth lens has positive focal power; the fifth lens has negative focal power; the sixth lens has positive or negative focal power; the seventh lens has positive focal power; the eighth lens has negative focal power; the ninth lens has positive focal power; the tenth lens has negative focal power; an eleventh lens having negative focal power; the twelfth lens has positive focal power; the thirteenth lens has negative focal power; the fourteenth lens has positive focal power; the fifteenth lens has positive focal power; the sixteenth lens has positive focal power; the number of lenses with focal power of the prime lens is sixteen.

The prime lens 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 which are sequentially arranged from an object plane to an image plane along an optical axis, the first lens, the fourth lens, the fifth lens and the seventh lens are all positive focal power lenses, and the second lens, the third lens and the sixth lens are all negative focal power lenses. The eighth lens is a positive focal power lens or a negative focal power lens; the focal power of the first lens is phi 1, the focal power of the second lens is phi 2, the focal power of the third lens is phi 3, and the focal power of the prime lens is phi; wherein, the result is 0.9 lt; phi 1 / phi + phi 2 / phi + phi 3 / phi lt; and 1.3. According to the technical scheme, the number of the lenses included in the prime lens and the focal power matching mode of the multiple lenses are reasonably set, small imaging aberration and high imaging quality are guaranteed, meanwhile, the design of relative miniaturization of the prime lens is achieved, and the design of the prime lens with a large field angle can be achieved.

The utility model provides a prime lens. The prime lens comprises a lens barrel and a spring. The prime lens body is arranged at the top of the lens barrel, a connecting ring is fixedly installed at the bottom of the prime lens body, and the connecting ring is arranged at the top of the inner side face of the lens barrel; the clamping frames are fixedly installed in the two sides of the lens cone respectively, and the inner side faces of the clamping frames are connected with abutting blocks in a sliding mode; and the fixing frames are fixedly installed in the two sides of the connecting ring correspondingly, and clamping blocks are slidably connected to the inner side faces of the fixing frames. According to the prime lens provided by the utility model, through mutual cooperation of the fixing frame, the spring, the clamping block, the clamping frame, the abutting block and other structures, when the prime lens body needs to be disassembled, only the abutting block needs to be pressed to push the clamping block, so that the clamping block moves out from the inner side surface of the clamping frame, and the prime lens body can be disassembled. Therefore, the prime lens body can be disassembled, and the operation is convenient and fast.