A 20 times wide dynamic high definition zoom lens

Abstract

The present application relates to a kind of 20 times wide dynamic high-definition zoom lens, including the front fixed lens group, zoom lens group, compensation lens group and rear fixed lens group in turn along the incident light path;Front fixed lens group is in turn by negative crescent lens A and bi-convex lens B close first cementing group, positive crescent lens C, positive crescent lens D;Zoom lens group is in turn by double-concave lens F and bi-convex lens G close second cementing group, double-concave lens H;Compensation lens group is in turn by bi-convex lens I, by negative crescent lens J and bi-convex lens K close third cementing group, flat convex lens L;Rear fixed lens group is in turn by double-concave lens M and bi-convex lens N close fourth cementing group, by negative crescent lens O and bi-convex lens P close fifth cementing group, by bi-convex lens Q and double-concave lens R close sixth cementing group, bi-convex lens S. Wide dynamic 20 times continuous zoom is realized, and imaging quality is high, and application range is wide.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optoelectronic technology, in particular to a 20 times wide dynamic high-definition zoom lens. BACKGROUND

[0002] In a visible light imaging system, a long focal length lens with high zoom ratio, which can be used in most light environments and various outdoor environments, has greater advantages in practical application scenarios such as unmanned monitoring, early warning, forest fire prevention, and border and sea defense compared with traditional zoom optical lenses, and can output stable high-definition images by real-time zoom tracking of different targets at different distances. However, few existing continuous zoom optical lenses can simultaneously meet the above functions, limiting their application scenarios. SUMMARY

[0003] Therefore, the purpose of the present application is to provide a 20 times wide dynamic high-definition zoom lens, which realizes wide dynamic 20 times continuous zoom, has high imaging quality, and has a wide range of applications.

[0004] The present application adopts the following scheme: a 20 times wide dynamic high-definition zoom lens, the optical system of the lens includes a front fixed lens group, a variable magnification lens group, a compensation lens group and a rear fixed lens group arranged in sequence along the incident light path; the lenses with optical power of the front fixed lens group along the incident light path are in sequence a first cemented group of negative meniscus lens A and double convex lens B, positive meniscus lens C, and positive meniscus lens D; the lenses with optical power of the variable magnification lens group along the incident light path are in sequence plano-concave lens E, a second cemented group of double concave lens F and double convex lens G, and double concave lens H; the lenses with optical power of the compensation lens group along the incident light path are in sequence double convex lens I, a third cemented group of negative meniscus lens J and double convex lens K, and plano-convex lens L; the lenses with optical power of the rear fixed lens group along the incident light path are in sequence a fourth cemented group of double concave lens M and double convex lens N, a fifth cemented group of negative meniscus lens O and double convex lens P, a sixth cemented group of double convex lens Q and double concave lens R, and double convex lens S.

[0005] Further, the air gap between the front fixed lens group and the variable magnification lens group is 3.4mm-109.4mm, the air gap between the variable magnification lens group and the compensation lens group is 161.1mm-2.0mm, and the air gap between the compensation lens group and the rear fixed lens group is 5.6mm-58.8mm.

[0006] Further, the air gap between the first cemented group and the positive meniscus lens C is 0.2mm, the air gap between the positive meniscus lens C and the positive meniscus lens D is 0.2mm; the air gap between the plano-concave lens E and the second cemented group is 6.8mm, the air gap between the second cemented group and the biconcave lens H is 1.0mm; the air gap between the biconvex lens I and the third cemented group is 2.7mm, the air gap between the third cemented group and the plano-convex lens L is 0.1mm; the air gap between the fourth cemented group and the fifth cemented group is 27.8mm, the air gap between the fifth cemented group and the sixth cemented group is 2.2mm, and the air gap between the sixth cemented group and the biconvex lens S is 28.5mm.

[0007] Further, the mechanical structure of the lens comprises a focusing main lens barrel, a main lens barrel and a rear group lens barrel arranged in sequence along the incident light path, the focusing main lens barrel is internally provided with a front group lens barrel, the main lens barrel is internally provided with a variable magnification slide and a compensation slide, the variable magnification slide and the compensation slide are respectively provided with a variable magnification lens barrel and a compensation lens barrel; the front fixed lens group, the variable magnification lens group, the compensation lens group and the rear fixed lens group are respectively mounted on the front group lens barrel, the variable magnification lens barrel, the compensation lens barrel and the rear group lens barrel.

[0008] Further, the mechanical structure of the lens further comprises an electric cover opening mechanism, an electric focusing mechanism, an electric zooming mechanism, an electric dimming mechanism, an electric attenuation plate switching mechanism, a detector camera and a sealing cover.

[0009] Further, the electric cover opening mechanism comprises a cover and a cover base located above the cover, the cover base is provided with a worm shaft and a cover motor, the two ends of the worm shaft are rotatably installed on the cover base through a bearing B and a worm bearing seat; the worm shaft is provided with a worm, and the cover base is rotatably installed with a worm gear meshing with the worm through a bearing A; the motor shaft of the cover motor is installed with a driving wheel meshing with a driven wheel on the worm, and a pair of mechanical arms are arranged at the two ends of the worm shaft, and the mechanical arms are connected with the cover.

[0010] Compared with the prior art, the present application has the following beneficial effects:

[0011] (1) The design is reasonable, 20 times continuous zooming with wide dynamic range is realized, the imaging quality is high, long-distance and high-speed moving targets can be searched, tracked and photographed in a large range, and the application range is wide;

[0012] (2) The fog wave band attenuation plate is arranged at the rear end of the lens, so that the lens can meet the use requirements in harsh environments, and the application scenarios are widened;

[0013] (3) Set the electric cover opening mechanism, the whole machine sealing, so that the lens can also be applied to forest, border, ship and other outdoor work platform.

[0014] In order to make the purpose, technical scheme and advantages of the present application more clear, the following will be further described in detail through specific examples and related drawings. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the optical structure schematic diagram of the lens in the embodiment of the present application;

[0016] Figure 2 is the whole schematic diagram of the lens in the embodiment of the present application;

[0017] Figure 3 is the short focus MTF diagram of the lens in the embodiment of the present application;

[0018] Figure 4 is the long focus MTF diagram of the lens in the embodiment of the present application;

[0019] Figure 5 is the electric focusing mechanism sectional view in the embodiment of the present application;

[0020] Figure 6 is the electric focusing mechanism front view in the embodiment of the present application;

[0021] Figure 7 is the electric zoom mechanism sectional view in the embodiment of the present application;

[0022] Figure 8 is the electric zoom mechanism rear view in the embodiment of the present application;

[0023] Figure 9 is the electric dimming mechanism sectional view in the embodiment of the present application;

[0024] Figure 10 is the electric dimming mechanism rear view in the embodiment of the present application;

[0025] Figure 11 is the electric attenuator switching mechanism rear view in the embodiment of the present application;

[0026] Figure 12 is the electric cover opening mechanism sectional view in the embodiment of the present application;

[0027] Figure 13 is the electric cover opening mechanism front view in the embodiment of the present application;

[0028] EXPLANATION OF REFERENCE NUMERALS IN DRAWINGS:

[0029] 11 - front fixed lens group; 111 - negative meniscus lens A; 112 - lenticular lens B; 113 - positive meniscus lens C; 114 - positive meniscus lens D; 12 - zoom lens group; 121 - biconcave lens E; 122 - biconcave lens F; 123 - biconcave lens G; 124 - biconcave lens H; 13 - compensation lens group; 131 - lenticular lens I; 132 - negative meniscus lens J; 133 - lenticular lens K; 134 - plano-convex lens L; 14 - rear fixed lens group; 141 - biconcave lens M; 142 - lenticular lens N; 143 - negative meniscus lens O; 144 - lenticular lens P; 145 - lenticular lens Q; 146 - biconcave lens R; 147 - lenticular lens S; 15 - attenuation sheet.

[0030] 16 - electric cover opening mechanism; 17 - electric focusing mechanism; 18 - electric zoom mechanism; 19 - electric dimming mechanism; 20 - electric attenuation sheet switching mechanism; 21 - front lens barrel; 22 - focusing cam pressure ring; 23 - front precision steel ball; 24 - focusing main lens barrel; 25 - focusing guide pin; 26 - focusing cam; 27 - rear precision steel ball; 28 - focusing motor gear; 29 - focusing motor; 210 - focusing potentiometer gear; 211 - focusing potentiometer; 31 - zoom lens barrel; 32 - zoom slide; 33 - front row of steel balls; 34 - zoom guide pin; 35 - zoom cam; 36 - main lens barrel; 37 - rear row of steel balls; 38 - zoom cam pressure ring; 39 - compensation lens barrel; 310 - compensation slide; 311 - compensation guide pin; 312 - zoom micro switch; 313 - zoom limit pin; 314 - zoom potentiometer; 315 - zoom motor; 316 - zoom potentiometer gear; 317 - zoom motor gear; 41 - diaphragm seat; 42 - diaphragm movable ring pressure ring; 43 - diaphragm movable ring; 44 - diaphragm motor gear; 45 - diaphragm dial pin; 46 - diaphragm adjusting ring pressure ring; 47 - diaphragm adjusting ring; 48 - diaphragm sheet assembly; 49 - diaphragm micro switch; 410 - diaphragm stop pin; 411 - diaphragm motor; 51 - rear group connecting plate; 52 - 100% attenuation sheet; 53 - attenuation sheet turntable shaft; 54 - Hall element; 55 - 50% attenuation sheet; 56 - attenuation sheet turntable; 57 - attenuation sheet motor gear; 58 - attenuation sheet gear wheel; 59 - attenuation sheet motor; 510 - 25% attenuation sheet; 511 - 10% attenuation sheet; 512 - magnetic steel; 61 - lens cover; 62 - mechanical arm; 63 - worm; 64 - worm gear; 65 - cover opening motor; 66 - bearing A; 67 - hand wheel; 68 - bearing B; 69 - worm shaft; 610 - worm wheel;

[0031] 70 - detector camera; 71 - sealing cover. DETAILED DESCRIPTION

[0032] It should be noted that the following detailed description is merely exemplary in nature and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0033] It is also important to note that the terms "or" and "and" as used herein, can be interchanged under appropriate circumstances. Moreover, the use of the term "including" as well as other forms for example, "comprising", "having", "containing", "including", "carrying", "having", "including", "carrying" or words of similar meaning, are intended to be open-ended terms that specify the presence of the stated elements or components, but do not preclude the presence or addition of one or more other elements or components.

[0034] As shown in Figures 1-3 A 20 times wide dynamic high-definition zoom lens, the optical system of the lens comprises a front fixed lens group 11, a variable magnification lens group 12, a compensation lens group 13 and a rear fixed lens group 14 arranged in turn along the incident light path; the front fixed lens group has lenses with optical power along the incident light path in turn: the first cemented group of negative meniscus lens A111 and biconvex lens B112, positive meniscus lens C113, positive meniscus lens D114; the variable magnification lens group has lenses with optical power along the incident light path in turn: biconcave lens E121, the second cemented group of biconcave lens F122 and biconvex lens G123, biconcave lens H124; the compensation lens group has lenses with optical power along the incident light path in turn: biconvex lens I131, the third cemented group of negative meniscus lens J132 and biconvex lens K133, biconvex lens L134; the rear fixed lens group has lenses with optical power along the incident light path in turn: the fourth cemented group of biconcave lens M141 and biconvex lens N142, the fifth cemented group of negative meniscus lens O143 and biconvex lens P144, the sixth cemented group of biconvex lens Q145 and biconcave lens R146, biconvex lens S147.

[0035] In this embodiment, an attenuation sheet 15 is further provided behind the rear fixed lens group 14.

[0036] In this embodiment, biconvex lens B112, positive meniscus lens C113, positive meniscus lens D114, biconvex lens K133, biconvex lens L134, biconvex lens P144 are made of ultra-low dispersion optical glass. By selecting ultra-low dispersion optical glass material, the chromatic aberration of the system is reduced, and the system resolution is improved.

[0037] In the embodiment, the air gap between the front fixed lens group and the variable lens group is 3.4mm-109.4mm, the air gap between the variable lens group and the compensation lens group is 161.1mm-2.0mm, and the air gap between the compensation lens group and the rear fixed lens group is 5.6mm-58.8mm.

[0038] In the embodiment, the air gap between the first cemented lens group and the positive meniscus lens C is 0.2mm, the air gap between the positive meniscus lens C and the positive meniscus lens D is 0.2mm; the air gap between the plano-concave lens E and the second cemented lens group is 6.8mm, the air gap between the second cemented lens group and the double-concave lens H is 1.0mm; the air gap between the double-convex lens I and the third cemented lens group is 2.7mm, the air gap between the third cemented lens group and the plano-convex lens L is 0.1mm; the air gap between the fourth cemented lens group and the fifth cemented lens group is 27.8mm, the air gap between the fifth cemented lens group and the sixth cemented lens group is 2.2mm, and the air gap between the sixth cemented lens group and the double-convex lens S is 28.5mm.

[0039] The optical system composed of the above lens groups achieves the following optical indexes:

[0040] Focal length: f'min=24.2mm, f'max=518mm;

[0041] Field of view: 2.2°x1.2°-44°x24°;

[0042] Optical total length ∑L: 364.8mm;

[0043] Variable stroke: 106mm;

[0044] Spectral range: 470nm-656nm.

[0045] In the selection, the initial structure of positive compensation is selected, which is beneficial to reduce the secondary spectrum aberration of the system and improve the imaging quality at long focus; the super low dispersion material (such as FCD100 material) is used in the front fixed lens group to further reduce the secondary spectrum aberration of the system and improve the resolution level; the high refractive index and low dispersion glass is selected as the material of the positive lens to reduce the curvature of the refractive surface, which is beneficial to correct the high-order spherical aberration of the on-axis point and off-axis point; the variable lens group and the rear fixed lens group are appropriately complicated to reduce the image distortion at long focus and short focus, and to reduce the lead of the moving group.

[0046] During imaging: Light passes from front to back sequentially through the first cemented group, the meniscus lens C113, the meniscus lens D114, the plano-concave lens E121, the second cemented group, the biconcave lens H124, the biconvex lens I131, the third cemented group, the plano-convex lens L134, the fourth cemented group, the fifth cemented group, the sixth cemented group, the biconvex lens S147, and the attenuator 15 before forming an image.

[0047] This invention features a rationally designed 20x wide dynamic range high-definition zoom lens, achieving continuous zoom across a large target area from 24.2-518mm. It enables wide-range searching, tracking, and ultra-high-definition photography of targets at close and long distances, as well as high-speed moving targets, making it suitable for applications such as unmanned monitoring, early warning, reconnaissance and strike, and imaging guidance. A fog-penetrating attenuator is incorporated at the rear of the lens, allowing it to withstand harsh environments and broadening its application scenarios. Furthermore, an electrically operated cover opening mechanism and a fully sealed design enable the lens to be used in field operations such as forests, border defense, and ships.

[0048] In this embodiment, the lens parameters of the front fixed lens group 11, the zoom lens group 12, the compensating lens group 13, and the rear fixed lens group 14 are shown in the table below:

[0049]

[0050] like Figure 4 As shown, in this embodiment, the mechanical structure of the lens includes a focusing main lens barrel 24, a main lens barrel, and a rear lens barrel arranged sequentially along the incident light path. The focusing main lens barrel 24 has a front lens barrel 21 inside. The main lens barrel has a zoom slide and a compensation slide. The zoom slide and the compensation slide are respectively equipped with zoom lens barrels and compensation lens barrels. The front fixed lens group, zoom lens group, compensation lens group, and rear fixed lens group are respectively mounted on the front lens barrel, zoom lens barrel, compensation lens barrel, and rear lens barrel.

[0051] In this embodiment, the mechanical structure of the lens also includes an electric cover opening mechanism 16, an electric focusing mechanism 17, an electric zoom mechanism 18, an electric dimming mechanism 19, an electric attenuator switching mechanism 20, a detector camera 70, and a sealing cover 71. The detector camera is mounted on the rear connecting tube, and the sealing cover 71 ensures the overall watertightness of the lens. The rear connecting tube is connected to the rear connecting plate 51.

[0052] like Figure 5 , 6As shown, the electric focusing mechanism realizes focusing on near and far targets, including focusing cam 26, focusing motor 29, focusing motor gear 28, focusing cam 26 is installed outside focusing main lens barrel 24 through front precision ball 23 and rear precision ball 27, and is pressed tightly by focusing cam pressing ring 22, focusing lens barrel 21 is loaded into focusing main lens barrel 24 through grinding cooperation with focusing main lens barrel 24. Focusing cam 26 is milled with linear inclined groove according to optical focusing stroke requirement, focusing main lens barrel 24 is milled with 3 equal division straight grooves; front group lens barrel 21 is coupled with focusing cam 26 and focusing main lens barrel 24 by 3 focusing guide nails 25 which are uniformly distributed by 120°, focusing motor gear 28 is engaged with gear on focusing cam 26. When focusing motor 29 is powered to rotate, rotating focusing cam 26, through straight groove limitation on focusing main lens barrel 24, rotating movement of focusing cam 26 is converted into linear movement of focusing lens barrel 21, thereby realizing focusing on near and far targets. When focusing on near and far targets, focusing potentiometer gear 210 drives focusing potentiometer 211 shaft to rotate through engagement with focusing cam 26, so that resistance value of focusing potentiometer 211 changes, change value of focusing potentiometer 211 can be read through appropriate sampling circuit, and is transmitted to control center, thereby realizing display of focusing distance value; conversely, through command given by control center, real-time control of focusing distance value can be realized.

[0053] As Figure 7 , 8As shown, the electric zoom mechanism realizes the continuous variable function of the system focal length, including zoom cam 35 and zoom motor 315, zoom lens barrel 31 is mounted on zoom carriage 32 by screw to form zoom assembly; compensation lens group 39 is mounted on compensation carriage 310 by screw to form compensation assembly. Zoom carriage 32 and compensation carriage 310 are respectively loaded into main lens barrel 36 after grinding fit with main lens barrel 36, zoom cam 35 is mounted on main lens barrel 36 through front precision steel ball 33 and rear precision steel ball 37, and is pressed tightly by zoom cam pressing ring 38 to form rolling bearing structure, so as to convert the sliding friction of zoom cam 35 rotation into rolling friction to reduce the friction of zoom cam 35 movement. Zoom cam 35 is respectively milled with zoom and compensation curve grooves according to the requirement of optical zoom motion equation, and then zoom guide pin 34 and compensation guide pin 311 are used to connect zoom cam 35 with zoom carriage 32 and compensation carriage 310. Zoom motor gear 317 and zoom potentiometer gear 316 are respectively engaged with zoom cam 35 gear. When the rotor of zoom motor 315 rotates positively or negatively, zoom potentiometer 314 rotates synchronously with zoom cam 35. Zoom carriage 32 and compensation carriage 310 are driven to move according to the zoom and compensation curve grooves through zoom and compensation curve grooves and zoom guide pin 34 and compensation guide pin 311. Two straight grooves on main lens barrel 36 support zoom guide pin 34 and compensation guide pin 311, and make the rotational movement of zoom cam 35 become the linear movement of zoom carriage 32 and compensation carriage 310. The matching gap between zoom guide pin 34 and compensation guide pin 311, curve groove of zoom cam 35 and straight groove of main lens barrel 36 is strictly controlled to ensure that the zoom and compensation assemblies slide smoothly and comfortably without jamming. In this way, zoom assembly and compensation assembly move forward and backward linearly according to the requirement of zoom motion equation by the rotation of zoom motor 315, so as to realize the continuous variable function of the system focal length. When the focal length of the system changes, zoom potentiometer gear 316 engages with zoom cam 35 gear to make zoom potentiometer 314 rotate, and the resistance value of zoom potentiometer 314 changes. The change value of zoom potentiometer 314 can be taken out through appropriate sampling circuit and transmitted to the control center, so as to realize the display of focal length value; conversely, the real-time control of focal length can be realized by giving command from the control center.

[0054] As Figure 9 , 10As shown, the electric light adjusting mechanism includes a diaphragm piece assembly 48 composed of diaphragm pins and diaphragm pieces. The movable pin ends of the diaphragm piece assembly 48 are evenly installed in the holes of the diaphragm seat 41, the diaphragm movable ring 43 is installed on the diaphragm seat 41, and the fixed pin ends of the diaphragm piece assembly 48 are evenly installed in the straight slots on the diaphragm movable ring 43. The diaphragm movable ring pressing ring 42 is screwed on the diaphragm seat 41. The diaphragm seat 41 is milled according to the movable rotating angle of the diaphragm piece, the diaphragm movable ring 43 is matched with the diaphragm adjusting ring 47 through the diaphragm push pin 45, and the diaphragm adjusting ring is locked by the diaphragm adjusting ring pressing ring 46 to ensure smooth rotation of the diaphragm adjusting ring 47 without jamming. The diaphragm motor gear 44 is engaged with the gear on the diaphragm adjusting ring 47. When the diaphragm motor 411 is powered on, the diaphragm adjusting ring 47 rotates, and the diaphragm piece assembly 48 rotates to change the size of the diaphragm opening, realizing the variable function of the diaphragm.

[0055] As shown in Figure 11 , the electric attenuation piece switching mechanism includes an attenuation piece 15 and an attenuation piece turntable 56. Four attenuation pieces of different specifications are installed in the attenuation piece turntable 56, which are 100% attenuation piece 52, 50% attenuation piece 55, 25% attenuation piece 510, and 10% attenuation piece 511. The attenuation piece turntable 56 is fixed on the rear group connecting plate 51 through the attenuation piece turntable shaft 53 to ensure smooth rotation of the attenuation piece turntable 56 without jamming. The attenuation piece motor gear 58 is engaged with the attenuation piece turntable 56 through the attenuation piece over wheel 57. When the attenuation piece motor 59 is powered on, the attenuation piece turntable 56 rotates, and the attenuation piece Hall element plate 512 serves as a limiting position to realize the cyclic switching requirement between attenuation pieces of different specifications.

[0056] As shown in Figure 12 , 13 , the electric cover opening mechanism includes a mirror cover 61 and a cover base above the mirror cover 61. The cover base is provided with a worm shaft 69 and a cover motor 65. The two ends of the worm shaft 69 are rotatably installed on the cover base through the bearing B 68 and the worm bearing seat. The worm shaft 69 is provided with a worm wheel 610, and the cover base is rotatably installed with a worm gear 63 engaged with the worm wheel 610 through the bearing A 66. The motor shaft of the cover motor 65 is installed with a driving wheel engaged with a driven wheel on the worm gear 63. The worm gear 63 moves in the worm shaft system composed of the cover base and the bearing A 66, and the worm wheel 610 moves in the worm shaft system composed of the worm shaft 69, the bearing B 68, and the worm bearing seat. A pair of mechanical arms 62 are provided at both ends of the worm shaft 69, and the mechanical arms 62 are connected with the mirror cover 61. The bearings are designed with dustproof to prevent dust from falling and improve the transmission performance of the bearings to ensure smooth opening and closing of the mirror cover.

[0057] When the opening cover motor 65 rotates, the driving wheel 64 on the motor shaft drives the driven wheel on the worm 63 to rotate, so that the worm 63 rotates, the worm 63 meshes with the worm wheel 610, drives the worm wheel 610, the worm wheel shaft 69 rotates and changes the rotation direction of the worm wheel shaft 69 by 105°, that is, the rotation direction of the worm wheel shaft 69 is perpendicular to the optical axis of the lens, and the rotation of the worm wheel shaft 69 drives the mechanical arm 62 to open and close the lens cover 61, so that the positive and negative rotation of the opening cover motor drives the lens cover to open and close.

[0058] Any of the technical solutions disclosed in the above application, unless otherwise stated, if it discloses a numerical range, the disclosed numerical range is a preferred numerical range, any person skilled in the art should understand that the preferred numerical range is only one of the many implementable values with more obvious technical effects or representative values. Because there are too many values, it is impossible to enumerate, therefore, the application discloses part of the values to illustrate the technical solutions of the application, and the above enumerated values should not constitute a limitation on the protection scope of the application.

[0059] If the application discloses or involves mutually fixed connecting parts or structural parts, unless otherwise stated, the fixed connection can be understood as: detachable fixed connection (for example, using bolt or screw connection), and can also be understood as: non-detachable fixed connection (for example, riveting, welding), of course, the mutual fixed connection can also be replaced by an integral structure (for example, manufactured by integral forming process) (obviously, except for integral forming process).

[0060] In addition, the terms used to represent the position relationship or shape in any of the technical solutions disclosed in the above application, unless otherwise stated, its meaning includes the approximate, similar or close state or shape.

[0061] Any of the components provided by the application can be assembled from a plurality of individual components, or can be a single component manufactured by integral forming process.

[0062] The above is only the preferred embodiment of the application, and is not intended to limit the application in other forms. Any person skilled in the art can modify or change the above disclosed technical content to equivalent embodiments. However, any simple modification, equivalent change and modification made on the basis of the technical essence of the application to the above embodiments, without departing from the technical solution content of the application, still belongs to the protection scope of the technical solution of the application.

Claims

1. A 20x wide dynamic high definition zoom lens characterized by: The optical system of the lens is composed of a front fixed lens group, a zoom lens group, a compensation lens group and a rear fixed lens group arranged in sequence along the incident light path; the front fixed lens group has four lenses with optical power along the incident light path, which are in sequence a first cemented group of a negative meniscus lens A and a biconvex lens B, a positive meniscus lens C, a positive meniscus lens D; the zoom lens group has four lenses with optical power along the incident light path, which are in sequence a plano-concave lens E, a second cemented group of a biconcave lens F and a biconvex lens G, a biconcave lens H; the compensation lens group has four lenses with optical power along the incident light path, which are in sequence a biconvex lens I, a third cemented group of a negative meniscus lens J and a biconvex lens K, a plano-convex lens L; the rear fixed lens group has seven lenses with optical power along the incident light path, which are in sequence a fourth cemented group of a biconcave lens M and a biconvex lens N, a fifth cemented group of a negative meniscus lens O and a biconvex lens P, a sixth cemented group of a biconvex lens Q and a biconcave lens R, a biconvex lens S; the air gap between the front fixed lens group and the zoom lens group is 3.4mm-109.4mm, the air gap between the zoom lens group and the compensation lens group is 161.1mm-2.0mm, and the air gap between the compensation lens group and the rear fixed lens group is 5.6mm-58.8mm.

2. The 20x wide dynamic high definition zoom lens of claim 1, wherein: The air gap between the first cemented group and the positive meniscus lens C is 0.2mm, the air gap between the positive meniscus lens C and the positive meniscus lens D is 0.2mm; the air gap between the plano-concave lens E and the second cemented group is 6.8mm, the air gap between the second cemented group and the biconcave lens H is 1.0mm; the air gap between the biconvex lens I and the third cemented group is 2.7mm, the air gap between the third cemented group and the plano-convex lens L is 0.1mm; the air gap between the fourth cemented group and the fifth cemented group is 27.8mm, the air gap between the fifth cemented group and the sixth cemented group is 2.2mm, and the air gap between the sixth cemented group and the biconvex lens S is 28.5mm.

3. The 20x wide dynamic high definition zoom lens of claim 1, wherein: The mechanical structure of the lens includes a focusing main lens barrel, a main lens barrel and a rear group lens barrel arranged in sequence along the incident light path, the focusing main lens barrel is internally provided with a front group lens barrel, the main lens barrel is internally provided with a zoom slide and a compensation slide, the zoom slide and the compensation slide are respectively provided with a zoom lens barrel and a compensation lens barrel; the front fixed lens group, the zoom lens group, the compensation lens group and the rear fixed lens group are respectively mounted on the front group lens barrel, the zoom lens barrel, the compensation lens barrel and the rear group lens barrel.

4. The 20x wide dynamic high definition zoom lens of claim 3, wherein: The mechanical structure of the lens further includes an electric cover opening mechanism, an electric focusing mechanism, an electric zoom mechanism, an electric light adjusting mechanism, an electric attenuation plate switching mechanism, a detector camera and a sealing cover.

5. The 20x wide dynamic high definition zoom lens of claim 4, wherein: The electric cover opening mechanism comprises a mirror cover and a cover base above the mirror cover, the cover base is provided with a worm shaft and a cover opening motor, both ends of the worm shaft are rotatably installed on the cover base through a bearing B and a worm bearing seat, the worm shaft is provided with a worm, the cover base is rotatably installed with a worm gear meshing with the worm through a bearing A, a driving wheel is installed on a motor shaft of the cover opening motor and meshes with a driven wheel on the worm, a pair of mechanical arms are arranged at both ends of the worm shaft, and the mechanical arms are connected with the mirror cover.

Images