316 results about "Low distortion" patented technology

The invention provides an optical lens, which comprises nine lenses from an object side to an imaging surface along an optical axis: 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, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power; the seventh lens has positive focal power; the eighth lens has negative focal power; and the ninth lens has positive focal power. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the lens has one or more advantages of short focus, miniaturization, large field angle, large aperture, large target surface, low distortion and low sensitivity.

The invention provides an optical lens, which comprises nine lenses from an object side to an imaging surface along an optical axis: 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, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power; the seventh lens has positive focal power; the eighth lens has negative focal power; and the ninth lens has positive focal power. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the lens has one or more advantages of short focus, miniaturization, large field angle, large aperture, large target surface, low distortion and low sensitivity.

The invention provides an optical lens, which comprises nine lenses from an object side to an imaging surface along an optical axis: 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, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the fourth lens has negative focal power, and the object side surface of the fourth lens is a concave surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power, and the image side surface of the sixth lens is a concave surface; the seventh lens has positive focal power; the eighth lens has negative focal power; and the ninth lens has positive focal power. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the lens has one or more advantages of short focus, miniaturization, large field angle, large aperture, large target surface, low distortion and low sensitivity.

The invention provides an optical lens, which comprises nine lenses from an object side to an imaging surface along an optical axis: 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, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power; the seventh lens has positive focal power; the eighth lens has positive focal power; and the ninth lens has positive focal power. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the lens has one or more advantages of short focus, miniaturization, large field angle, large aperture, large target surface, low distortion and low sensitivity.

The utility model provides a low-distortion vehicle-mounted optical imaging system and a camera module applying the same, which mainly comprise seven lenses, the first lens has focal power, the second lens has focal power, the object side surface of the second lens is a convex surface, the third lens has negative focal power, the object side surface of the third lens is a concave surface, the image side surface of the third lens is a concave surface, the fourth lens has positive focal power, and the fifth lens has negative focal power. The fifth lens has positive focal power, the object side face of the fifth lens is a convex face, the sixth lens has focal power, the seventh lens has negative focal power, through reasonable matching of the lens shapes and the focal power, the advantages of low distortion, high pixel and high resolution design are achieved, the temperature characteristic is excellent, and the image resolution ratio is high. The object identification capability of the optical system is further improved, and the design requirements of low distortion and high resolution of the optical system are effectively met.

The utility model discloses a deformable lens, which comprises a first spherical lens group, a second spherical lens group, a first cylindrical lens group, a third spherical lens group, a second cylindrical lens group, a fourth spherical lens group and a twentieth lens which are sequentially arranged from an object space to an image space, the focal lengths of all the lens groups meet the following conditions: 1.4 lt; f (G1-G7) Y / f (G1-G7) Xlt; 1.6); 1lt; 1lt; f (G2) X / f (G1-G4) Xlt; -0.7,-0.7; -2lt;-2lt; f (G3) X / f (G1-G4) Xlt; -1.3,-1.3; 361t; 361t; f (G5) Y / f (G5-G7) Ylt; 24); 0.8 lt; f (G1-G4) X / f (G5-G7) Xlt; 1.2; 1.1 lt; 1.1 lt; f (G1-G4) Y / f (G5-G7) Ylt; and 1.7. The integrated design is adopted, so that the lens is small in size, and meanwhile, the optical performance of high resolution, low respiration, low distortion, 1.5 X high magnification and the like is obtained.

The invention provides an optical lens, which comprises nine lenses from an object side to an imaging surface along an optical axis: 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, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power, and the image side surface of the sixth lens is a concave surface; the seventh lens has positive focal power; the eighth lens has positive focal power; and the ninth lens has negative focal power. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the lens has one or more advantages of short focus, miniaturization, large field angle, large aperture, large target surface, low distortion and low sensitivity.

The utility model relates to an optical lens, which sequentially comprises a first lens, a second lens, a third lens and a fourth lens along the optical axis from the object side to the image side, a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power, a seventh lens with negative focal power and an eighth lens with negative focal power are included. The combined effective focal length of the first lens and the second lens is F12, and the Abbe number Vd1 of the first lens and the Abbe number Vd2 of the second lens meet the following relation: F12 / (Vd1-Vd2) is greater than or equal to 1 and less than or equal to 4.85. The optical lens at least has one of the characteristics of large field of view, miniaturization, large target surface, high resolution, low distortion and the like.

The invention provides a compact hyperspectral imager optical system and an imaging method thereof, which are used for solving the technical problems that the overall size of a front telescopic assembly in a traditional hyperspectral imager optical system is difficult to compress, the installation and adjustment difficulty is relatively large, or the incident energy is lost and the space coverage capability is insufficient. And the technical problems of low energy utilization rate and difficulty in improving the sensitivity and the signal-to-noise ratio of the hyperspectral imager of the traditional Dyson type dispersion light splitting assembly are solved. The invention provides a compact hyperspectral imager optical system, which comprises an off-axis two-image-reflection telecentric optical path system based on a free-form surface and a Dyson light splitting system based on a curved surface prism, and realizes high regulation and control capability on light through multiple degrees of freedom of a curved surface shape. Compared with the prior art, the high-spectral imaging device has the advantages that the high-spectral imaging device is simple in structure, high image quality, small distortion and good telecentricity are achieved, meanwhile, the curved prism serves as a dispersion light splitting element, the whole spectrum has high light splitting efficiency, and the signal-to-noise ratio and sensitivity of the high-spectral imaging device can be improved.

The invention provides an imaging optical system for industrial visual inspection, which is characterized in that a first lens is mainly composed of nine lenses and has focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has focal power; the third lens has focal power; the fourth lens has focal power; the fifth lens has positive focal power; the sixth lens has focal power, and the object side surface of the sixth lens is a convex surface; the seventh lens has focal power, and the object side surface of the seventh lens is a concave surface; the eighth lens has focal power; and the ninth lens has positive focal power, the image side surface of the ninth lens is a convex surface, and through the combination design of nine lenses and the reasonable configuration of the refractive power and the surface type of each lens, high-resolution imaging under a compact structure and a large aperture is realized, the aberration correction capability is particularly enhanced, and a relatively high MTF value is ensured in the whole zoom range. Accuracy and reliability of industrial detection are remarkably improved, and the system has the advantages of zooming, low distortion and low cost.

An information handling system camera provides a 117 degree field of view with low distortion by capturing visual images through a lens having eight lens elements. The first lens element closest to the object, the third lens element and the sixth lens element each have a glass material, the remaining lens elements have a plastic material. The first two lens elements and the last lens element each have a negative refractive power and the remaining lens elements have a positive refractive power. Lens elements two and four through eight each have aspherical surfaces.

The invention discloses an intelligent audio scene adaptation method based on an MEMS loudspeaker, and relates to the technical field of audio scene adaptation. Audio is collected through a microphone array, and features such as frequency domain entropy are fused to construct vectors; a scene is identified by using BiLSTM and a self-attention model, and rapid adaptation is carried out in combination with transfer learning; optimizing loudspeaker parameters based on a coupling model and a genetic algorithm, and compensating temperature influence; the equal-sound curve is dynamically adjusted according to the scene, the audio is enhanced, and cross-scene adaptation, parameter pre-adjustment and multi-loudspeaker collaborative optimization are realized through the technologies of adversarial training, model prediction control and the like. According to the invention, through multi-modal feature fusion and deep learning, the scene recognition accuracy is improved, the loudspeaker parameters are optimized by using the coupling model, and distortion and power consumption are reduced; the audio enhancement parameters are dynamically adjusted, multi-scene adaptation is achieved, the tone quality and the user experience are improved, and the application bottleneck of a traditional MEMS loudspeaker is solved.

The invention discloses a method and a system for optimizing a metering front end of an intelligent electric meter. The method comprises the following steps of: setting an anti-aliasing network with a near-linear phase at the front end of a metering channel and synchronously sampling; determining a range switching window based on zero crossing or a preset voltage change rate, executing automatic range switching in the window, and performing overlapping sampling and digital splicing on samples before and after switching; determining a rectification conduction empty window based on the rectification conduction prediction, suspending sampling in the empty window, and compensating a missing sample; injecting a reference signal into the channel at the calibration injection window, obtaining a correction coefficient according to response, and performing online correction; the three types of windows are not overlapped and are uniformly scheduled by a synchronous time sequence; and completing power and energy calculation according to the corrected voltage and current sequence. The system comprises an anti-aliasing network unit, a range control unit, a rectification conduction detection unit, an air window door control unit, an injection and online correction unit, a time sequence synchronization unit, a metering calculation unit and the like. According to the invention, low-distortion, wide-range and consistent metering output can be realized in practical application.

The invention relates to a refractive and super hybrid visible light pick-up lens and electronic equipment, and belongs to the field of optical lenses, the refractive and super hybrid visible light pick-up 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, and the other lenses are aspheric lenses. According to the invention, the large aperture and low distortion are realized through the eight-piece design, the total optical length is effectively compressed, the system is more miniaturized, lighter and thinner, and the surface type complexity of the aspherical lenses is reduced.

The invention relates to a 12M large-wide-angle security monitoring lens which sequentially comprises a diaphragm and first to ninth lenses from an object side to an image side, the first and second lenses have negative diopters, the third, fourth, sixth to ninth lenses have positive diopters, and the fifth lens has negative diopter. The aspheric lens is matched to correct aberration and suppress distortion. The working wave band of the lens covers 435-1000 nm, the F number is about 1.3, the maximum imaging circle diameter is about 16.8 mm, the TTL does not exceed about 22 mm, the relative illumination can reach about 39%, the main light angle is about 23 degrees, the lens is adaptive to a 12M large-size sensor, full-view-field high resolution, low distortion and clear imaging under weak light / infrared supplementary light are achieved, and the lens is suitable for security and protection monitoring equipment.

The invention discloses a miniaturized large-target-surface low-distortion aerial photographing lens and module. The aerial photographing lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a diaphragm, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens, a thirteenth lens, a fourteenth lens and a fifteenth lens which are sequentially arranged from the object side to the image side along the optical axis. Through reasonable lens structure design and curvature radius control, excellent low distortion performance is realized, and the geometric accuracy of an image is ensured. The design of fifteen lenses is adopted, sufficient design freedom is provided, various aberrations such as spherical aberration are effectively corrected, high resolution is achieved, and a large-target-surface photosensitive element is matched; through focal power distribution and aberration correction, the imaging effect of an edge field of view is remarkably improved, and the definition consistency of the center and the edge of a picture is ensured.

The present invention relates to a large-aperture and large-image-surface space debris monitoring optical system. The optical system is provided with a front fixed group A with negative optical power, an aperture, and a rear fixed group B with positive optical power in sequence along the incident light path. The front fixed group A is composed of a meniscus positive lens A1, a first cemented group formed by closely bonding a biconvex positive lens A2 and a biconcave negative lens A3, and a second cemented group formed by closely bonding a meniscus positive lens A4 and a meniscus negative lens A5. The rear fixed group B is composed of a biconvex positive lens B1, a biconcave negative lens B2 and a biconvex positive lens B1. The optical system consists of a third cemented group formed by closely bonding lenses B3, a biconvex positive lens B4, a fourth cemented group formed by closely bonding biconvex positive lens B5 and biconcave negative lens B6, a meniscus positive lens B7, a meniscus negative lens B8 and flat glass B9; the optical system has high resolution, low distortion, small chromatic aberration, strong monitoring capability, large aperture and large image surface, which are conducive to enhancing the energy entering the optical system, monitoring smaller space debris, and increasing the monitoring range of space debris; a weight-reduction design is adopted to effectively control the weight of the lenses, which is conducive to the carrying of aircraft.

The invention discloses a small low-distortion vehicle-mounted lens, and belongs to the technical field of optical lenses. Comprising a first lens with positive focal power, a second lens with positive focal power, a diaphragm, a third lens with negative focal power, a fourth lens with positive focal power, a fifth lens with positive focal power and a sixth lens with positive focal power which are sequentially arranged from an object plane to an image plane along an optical axis, and the following conditions are met: 0.3 lt; f / TTLlt; 0.4, 4.95 < = TTL / D < = 5.55; wherein f is the focal length of the small low-distortion vehicle-mounted lens, TTL is the total length of the small low-distortion vehicle-mounted lens, D is the entrance pupil diameter, and the unit is mm. The vehicle-mounted lens has the advantages of small size, low distortion, large aperture, high imaging quality and low cost, and is good in working stability in high and low temperature environments.

The present invention provides a low-distortion vehicle-mounted forward-looking optical system and a camera module used therein. The optical system is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens in sequence along the optical axis from the object plane to the image plane. By rationally allocating the surface shape and optical focal length of each lens and using a hybrid optical system of spherical and aspherical surfaces, the optical system's recognition of distant objects in front is improved, while taking into account the advantages of low distortion, high-definition resolution, excellent temperature characteristics, and ultra-high pixels. Therefore, the system has great potential in the field of vehicle-mounted forward-looking vision.

This speaker system provides high-quality sound reproduction through a novel configuration that suppresses the air spring effect. [Solution] The speaker device of the present invention comprises a housing 1 having a baffle plate 2 on which a speaker unit 3 that vibrates in response to an input electrical signal and outputs sound waves is mounted, and an opening 4 is provided on the bottom surface. A predetermined amount of granular material 6, placed parallel to the opening end 5, closes the opening 4 of the housing 1. Granular material 6 is interposed in the path from the internal space to the external space of the enclosure 1, creating a structure in which the air inside the enclosure 1 is acoustically connected to the outside atmosphere via the granular material 6. This configuration suppresses the air spring effect, making it possible to provide a speaker device that achieves high-quality sound reproduction with low distortion.

This invention discloses a high-definition lens, comprising a first lens, a first cemented lens group, an aperture stop, a fourth lens, and a fifth lens arranged sequentially from the object plane to the image plane; wherein the first lens and the fourth lens have negative optical power; the first cemented lens group and the fifth lens have positive optical power, and the fifth lens has a biconvex structure; the focal length of the lens is f, and the focal length of the first cemented lens group is f. U1 f U1 The following relationship exists between f and f: 0.35 < |f U1 / f|<0.90. The lens formed by this invention is not only compact and economical, but also ensures high imaging resolution, small aperture and low distortion, which can meet the needs of industrial applications and has great market prospects and economic value.

The utility model provides a digital-to-analog signal conversion circuit, which comprises a digital-to-analog (DA) conversion module, an amplification matching module, a filtering module, an operational amplifier module, a feedback adjustment module, a protection module and a signal output interface, and is characterized in that the DA conversion module comprises more than one group of first output ends and second output ends; the first output end and the second output end are respectively connected with two input ends of the amplification matching module, and two output ends of the amplification matching module are respectively connected with a normal phase input end and an inverted phase input end of the operational amplifier module through the filtering module. The output end of the operational amplifier module is respectively connected with the input end of the feedback adjustment module and the input end of the protection module, the output end of the feedback adjustment module is connected with one input end of the operational amplifier module, and the output end of the protection module outputs a processed single-ended analog signal to a signal output interface. The beneficial effects of the utility model are that the restored signal is low in distortion degree and low in noise.

The application discloses a high-resolution oblique-axis optical lens, comprising, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a protective glass and an image sensor; the first lens is a filter; the second lens is a biconvex spherical lens with positive focal power; the third lens is a spherical lens with negative focal power; the fourth lens is a spherical lens with positive focal power; and the fifth lens is a biconcave spherical lens with negative focal power. The technical scheme balances and corrects optical aberrations of all levels by reasonably distributing the focal power of the lenses, reasonably matching the optical materials and shapes, and utilizes the cylindrical lens to correct astigmatism caused by the optical path of the meridian arc vector plane of the protective glass, so that the advantages of large target surface, low distortion, ultra-short object distance, high resolving power and the like of the lens are achieved.

The present invention makes it possible to obtain low noise and low distortion in both of transistors to which a push-pull operation using a balun is applied.　This amplification device comprises: a first field effect transistor in which an input voltage is applied to the gate; a second field effect transistor connected in series to the first field effect transistor; a first inductor connected to the gate of the second field effect transistor; a second inductor connected in series to the source of the first field effect transistor and step-down inductively coupled to the first inductor; and a third inductor connected in series to the source of the second field effect transistor and step-down inductively coupled to the first inductor.

The application relates to the field of optical imaging technology and discloses a large-target high-resolution industrial lens and an optical system thereof. The optical system comprises, arranged in sequence from an object side to an image side, a first lens group S1 with positive focal power, an aperture A0, a second lens group S2 with positive focal power and a third lens group S3 with positive focal power, and the relative positions of the third lens group S3 and the image plane of the optical system remain unchanged; the first lens group S1, the second lens group S2 and the third lens group S3 are respectively composed of a plurality of spherical lenses, and the optical axes of all the spherical lenses coincide with a predetermined optical axis. The optical system provided by the application has a maximum resolution of 185 lp / mm, can match a 2.74-micron pixel chip, has a maximum target size of 1.2 inches, and has the advantages of low distortion performance and wide working distance.

This invention relates to the field of AR device technology, providing an AR optical lens and an AR device. The lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged sequentially along the optical axis from the object side to the image side. The first lens has positive optical power, with a convex surface on the object side and a concave surface on the image side; the second lens has positive optical power, with a convex surface on the object side and a concave surface on the image side; the third lens has negative optical power, with both the object side and the image side being concave; the fourth lens has positive optical power, with a concave surface on the object side and a convex surface on the image side; and the fifth lens has negative optical power, with a concave surface on the object side and a convex surface on the image side. All lenses are aspherical lenses. This invention, through a positive-positive-negative-positive-negative optical power arrangement of lenses, can simultaneously correct various aberrations such as spherical aberration, field curvature, and distortion, effectively achieving a large field of view, low distortion, and high resolution imaging effect, enhancing the immersiveness and clarity of AR displays.

This invention relates to the field of optical imaging technology, and discloses a compact long working distance fixed-magnification lens and its optical system. The optical system includes a front group with positive optical power, a middle group with negative optical power, an aperture stop, and a rear group with positive optical power; the focal length of the optical system is f, the optical rear focal length is BFL, and the focal length of the front group is f0. S1 The focal length of the middle group is f S2 The focal length of the rear element is f. S3 They respectively satisfy the relation: 0.4 < |f S1 / f|<0.75, 1.1<|f S2 / f|<1.7, 1.50<|f S3 / f|<8.00, 0.05<|BFL / f|<0.35. This invention realizes a long working distance fixed-magnification lens with high resolution, a lens magnification of 0.94X, a maximum resolution of 100 lp / mm, can be matched with 5-micron pixel chips, has a maximum target surface size of 1.2″, and also has low distortion performance.

The invention belongs to the technical field of filters, and particularly relates to a reconfigurable electric tuning frequency hopping filter and a multi-target optimization control method thereof.The filter comprises an MCU module, a resonance circuit module, a pre-distortion module and a signal receiving and transmitting module, the MCU module is provided with two main control CPUs and used for radio frequency signal processing, parameter control and communication coordination, address codes are calculated through the main control CPUs, and the signal receiving and transmitting module is used for receiving and transmitting signals. Radio frequency signal processing is set to be straight-through processing or filtering processing, a C-V curve and tuning voltage-frequency response of a variable capacitance diode are measured, a nonlinear model is established, and the non-linear model is used for radio frequency signal preprocessing of the MCU module, sending the radio frequency signal to the pre-distortion module or outputting the radio frequency signal after straight-through processing through parameter control of the MCU module. According to the invention, non-linear compensation can be carried out on signals with different frequencies in advance, and then the signals are distributed to corresponding resonance circuits through a digital chip in an address code calculation mode, so that the out-of-band rejection performance is improved, and distortion is reduced.

The present disclosure provides a low-distortion PAM-4 optical transmitter with a piecewise compensation scheme for VCSEL-based optical communication links. The input half-rate least significant bit (LSB) and most significant bit (MSB) data streams of the transmitter are firstly encoded into half-rate unary-weighted data streams by thermometer encoders. The half-rate unary-weighted data streams are then fed into three data slices with 2-tap feed-forward equalizer (FFE), continuous-time linear equalizer (CTLE), pre-emphasis circuit for serialization and piecewise pre-distortion. Finally, outputs from the three data slices are added in the form of current and fed into VCSEL. A thermal control loop is implemented to monitor the temperature of the VCSEL as well as provide compensation to the bias current of the VCSEL.

The invention provides a long-focus low-distortion imaging optical system and a camera module applying the same, the long-focus low-distortion imaging optical system is composed of eight lenses, the first lens has focal power, the object side surface is a convex surface, the image side surface is a concave surface, the second lens has positive focal power, the object side surface is a convex surface, the image side surface is a concave surface, the third lens has negative focal power, the object side surface is a convex surface, and the image side surface is a concave surface. The fourth lens has negative focal power, the fifth lens has focal power, the sixth lens has positive focal power, the seventh lens has focal power, and the eighth lens has negative focal power. Eight glass lenses are selected, and the refractive power and the surface type of each lens are reasonably configured; therefore, the optical lens has the advantages of being compact in structure, light in weight, low in distortion and large in aperture, meanwhile, detail information of an object can be well captured, the detail capturing capacity of the optical lens for shooting the object is improved, the picture texture of the optical lens is improved, and the resolution ratio and the imaging definition of the optical lens are improved, so that the requirements of various aerial photography applications are met.