Dynamic high-definition zoom lens with width of 20 times

Abstract

The 20-time wide dynamic high-definition zoom lens comprises a front fixed lens group, a zoom lens group, a compensating lens group and a rear fixed lens group which are sequentially arranged along an incident light path, the front fixed lens group sequentially comprises a first gluing group, a positive meniscus lens C and a positive meniscus lens D, wherein the first gluing group is formed by tightly connecting a negative meniscus lens A and a biconvex lens B; the zoom lens group sequentially comprises a plano-concave lens E, a second gluing group formed by tightly connecting a biconcave lens F and a biconvex lens G, and a biconcave lens H; the compensating lens group sequentially comprises a biconvex lens I, a third gluing group formed by closely connecting a negative meniscus lens J and a biconvex lens K, and a plano-convex lens L; and the rear fixed lens group sequentially comprises a fourth gluing group formed by tightly connecting a biconcave lens M and a biconvex lens N, a fifth gluing group formed by tightly connecting a negative meniscus lens O and a biconvex lens P, a sixth gluing group formed by tightly connecting a biconvex lens Q and a biconcave lens R, and a biconvex lens S. Wide dynamic 20-time continuous zooming is realized, the imaging quality is high, and the application range is wide.

Description

Technical Field

[0001] The invention relates to the field of optoelectronic technology, in particular to a 20-fold wide dynamic high-definition zoom lens. Background Art

[0002] In visible light imaging systems, telephoto lenses with high zoom, which can be used in most lighting environments and various outdoor environments, have greater advantages than traditional zoom optical lenses in practical application scenarios such as unmanned monitoring, early warning, forest fire prevention, border and coastal defense. They can perform real-time zoom tracking and video recording of targets at different distances and output stable and high-definition images. However, existing continuous zoom optical lenses are rarely compatible with the above functions at the same time, which limits their application scenarios. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a 20x wide dynamic high-definition zoom lens to achieve 20x wide dynamic continuous zoom, high imaging quality and a wide range of applications.

[0004] The present invention is implemented by the following scheme: a 20x wide dynamic high-definition zoom lens, wherein the optical system of the lens comprises a front fixed lens group, a variable magnification lens group, a compensation lens group and a rear fixed lens group arranged in sequence along an incident light path; the lenses having optical power along the incident light path of the front fixed lens group are in sequence a first cemented group consisting of a negative crescent lens A and a double convex lens B in close contact, a positive crescent lens C, and a positive crescent lens D; the lenses having optical power along the incident light path of the variable magnification lens group are in sequence a plano-concave lens E, a first cemented group consisting of a double concave lens F and a double convex lens D, and a plano-concave lens E, a first cemented group consisting of a double concave lens F and a double convex lens D. The second cemented group consisting of a convex lens G in close contact, and a biconcave lens H; the lenses having optical focal power along the incident light path of the compensation lens group are sequentially a biconvex lens I, a third cemented group consisting of a negative meniscus lens J and a biconvex lens K in close contact, and a plano-convex lens L; the lenses having optical focal power along the incident light path of the rear fixed lens group are sequentially a fourth cemented group consisting of a biconcave lens M and a biconvex lens N in close contact, a fifth cemented group consisting of a negative meniscus lens O and a biconvex lens P in close contact, a sixth cemented group consisting of a biconvex lens Q and a biconcave lens R in close contact, and a biconvex lens S.

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

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

[0007] Furthermore, the mechanical structure of the lens includes a focusing main lens barrel, a main lens barrel and a rear lens barrel arranged in sequence along the incident light path, a front lens barrel is arranged inside the focusing main lens barrel, a magnification slide and a compensation slide are arranged inside the main lens barrel, and a magnification lens barrel and a compensation lens barrel are respectively arranged on the magnification slide and the compensation slide; the front fixed lens group, the magnification lens group, the compensation lens group and the rear fixed lens group are respectively installed on the front lens barrel, the magnification lens barrel, the compensation lens barrel and the rear lens barrel.

[0008] Furthermore, the mechanical structure of the lens also includes an electric cover opening mechanism, an electric focusing mechanism, an electric zoom mechanism, an electric dimming mechanism, an electric attenuation plate switching mechanism, a detector camera and a sealing cover.

[0009] Furthermore, the electric cover opening mechanism includes a mirror cover and a cover opening base located above the mirror cover, the cover opening base is provided with a turbine shaft and a cover opening motor, and both ends of the turbine shaft are rotatably mounted on the cover opening base through bearings B and turbine bearing seats: a worm gear is provided on the turbine shaft, and a worm engaged with the worm gear is rotatably mounted on the cover opening base through bearing A; a driving wheel is installed on the motor shaft of the cover opening motor to mesh with a driven wheel on the worm gear, and a pair of mechanical arms are provided at both ends of the turbine shaft, and the mechanical arms are connected to the mirror cover.

[0010] Compared with the prior art, the present invention has the following beneficial effects: (1) The design is reasonable, achieving 20x wide dynamic range continuous zoom and high-quality imaging. It can perform large-scale search, tracking video and ultra-high-definition photography of targets at long and short distances and in high-speed motion. It is widely used in scenarios requiring unmanned monitoring, early warning, reconnaissance and strike, imaging guidance, etc. (2) A fog-penetrating band attenuation plate is provided at the rear end of the lens, so that the lens can adapt to the use requirements in harsh environments and broaden the application scenarios; (3) An electric cover opening mechanism is provided and the whole machine is sealed, so that the lens can also be used in field operation platforms such as forests, border defense, and ships.

[0011] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through specific embodiments and related drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of the optical structure of a lens in an embodiment of the present invention; Figure 2 is an overall schematic diagram of a lens in an embodiment of the present invention; Figure 3 is a short-focus MTF diagram of the lens in the embodiment of the present invention; Figure 4 is a telephoto MTF diagram of the lens in the embodiment of the present invention; Figure 5 is a cross-sectional view of an electric focusing mechanism in an embodiment of the present invention; Figure 6 is a front view of the electric focusing mechanism in an embodiment of the present invention; Figure 7 is a cross-sectional view of an electric zoom mechanism in an embodiment of the present invention; Figure 8 is a rear view of the electric zoom mechanism in an embodiment of the present invention; Fig. 9 is a cross-sectional view of an electric dimming mechanism in an embodiment of the present invention; Fig.10 is a rear view of the electric dimming mechanism in an embodiment of the present invention; Fig.11 1 is a rear view of the electric attenuation plate switching mechanism in an embodiment of the present invention; Fig.12 is a cross-sectional view of the electric cover opening mechanism in an embodiment of the present invention; Fig.13 1 is a front view of the electric cover opening mechanism in the embodiment of the present invention; Description of the numbers in the figure: 11-front fixed lens group; 111-negative meniscus lens A; 112-double convex lens B; 113-positive meniscus lens C; 114-positive meniscus lens D; 12-variable lens group; 121-double concave lens E; 122-double concave lens F; 123-double concave lens G; 124-double concave lens H; 13-compensating lens group; 131-double convex lens I; 132-negative meniscus lens J; 133-double convex lens K; 134-plano-convex lens L; 14-rear fixed lens group; 141-double concave lens M; 142-double convex lens N; 143-negative meniscus lens O; 144-double convex lens P; 145-double convex lens Q; 146-double concave lens R; 147-double convex lens S; 15-attenuation plate.

[0013] 16-electric cover opening mechanism; 17-electric focusing mechanism; 18-electric zoom mechanism; 19-electric dimming mechanism; 20-electric attenuation plate 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- Focus potentiometer; 31-zoom lens barrel; 32-zoom slide; 33-front steel balls; 34-zoom guide pins; 35-zoom cam; 36-main lens barrel; 37-rear steel balls; 38-zoom cam pressure ring; 39-compensation lens barrel; 310-compensation slide; 311-compensation guide pins; 312-zoom micro switch; 313-zoom limit pins; 314-zoom potentiometer; 315-zoom motor; 316-zoom potentiometer gear ;317-zoom motor gear;41-light bar seat;42-light bar moving ring pressure ring;43-light bar moving ring;44-light bar motor gear;45-light bar push pin;46-light bar adjustment ring pressure ring;47-light bar adjustment ring;48-light bar assembly;49-light bar micro switch;410-light bar stop pin;411-light bar motor;51-rear group connecting plate;52-100% attenuation plate;53-attenuation plate turntable shaft;54-Hall element Parts; 55-50% attenuation plate; 56-attenuation plate turntable; 57-attenuation plate motor gear; 58-attenuation plate pulley; 59-attenuation plate motor; 510-25% attenuation plate; 511-10% attenuation plate; 512-magnetic steel; 61-mirror cover; 62-mechanical arm; 63-worm; 64-worm gear; 65-cover opening motor; 66-bearing A; 67-handwheel; 68-bearing B; 69-turbine shaft; 610-turbine; 70-detector camera; 71-sealing cover. DETAILED DESCRIPTION

[0014] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0015] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0016] like Figures 1 to 3As shown, a 20x 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 sequence along an incident light path; the lenses of the front fixed lens group having optical power along the incident light path are in sequence a first cemented group consisting of a negative meniscus lens A111 and a biconvex lens B112 in close contact, a positive meniscus lens C113, and a positive meniscus lens D114; the lenses of the variable magnification lens group having optical power along the incident light path are in sequence a plano-concave lens E121, a first cemented group consisting of a biconcave lens F122 and a biconvex lens G123 in close contact, and a second cemented group consisting of a plano-concave lens E122 and a second cemented group consisting of a biconcave lens F122 and a biconvex lens G123 in close contact. The second cemented group and the biconcave lens H124; the lenses with optical focal power along the incident light path of the compensation lens group are sequentially a biconvex lens I131, a third cemented group consisting of a negative meniscus lens J132 and a biconvex lens K133 in close contact, and a plano-convex lens L134; the lenses with optical focal power along the incident light path of the rear fixed lens group are sequentially a fourth cemented group consisting of a biconcave lens M141 and a biconvex lens N142 in close contact, a fifth cemented group consisting of a negative meniscus lens O143 and a biconvex lens P144 in close contact, a sixth cemented group consisting of a biconvex lens Q145 and a biconcave lens R146 in close contact, and a biconvex lens S147.

[0017] In this embodiment, a damping plate 15 is further disposed behind the rear fixed mirror assembly 14 .

[0018] In this embodiment, the biconvex lens B112, the positive crescent lens C113, the positive crescent lens D114, the biconvex lens K133, the plano-convex lens L134, and the biconvex lens P144 are all made of ultra-low dispersion optical glass. By selecting ultra-low dispersion optical glass materials, the chromatic aberration of the system is reduced and the system resolution is improved.

[0019] In this embodiment, 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.

[0020] In this embodiment, the air gap between the first bonding group and the positive meniscus lens C is 0.2 mm, and the air gap between the positive meniscus lens C and the positive meniscus lens D is 0.2 mm; the air gap between the plano-concave lens E and the second bonding group is 6.8 mm, and the air gap between the second bonding group and the biconcave lens H is 1.0 mm; the air gap between the biconvex lens I and the third bonding group is 2.7 mm, and the air gap between the third bonding group and the plano-convex lens L is 0.1 mm; the air gap between the fourth bonding group and the fifth bonding group is 27.8 mm, the air gap between the fifth bonding group and the sixth bonding group is 2.2 mm, and the air gap between the sixth bonding group and the biconvex lens S is 28.5 mm.

[0021] The optical system composed of the above lens group achieves the following optical indicators: Focal length: f′min=24.2mm, f′max=518mm; Field of view: 2.2°×1.2°~44°×24°; Total optical length ∑L: 364.8mm; Zoom stroke: 106mm; Spectral range: 470nm~656nm.

[0022] When selecting the model, the initial structure of positive group compensation is selected. This structure is beneficial to reducing the system's secondary spectral aberrations and improving the imaging quality at long focus; ultra-low dispersion materials (such as FCD100 and other materials) are used in the front fixed lens group to further reduce the system's secondary spectral aberrations and improve the resolution level; by selecting high refractive index and low dispersion glass as the material of the positive lens, the curvature of the refractive surface is reduced, which is beneficial to correcting the high-order spherical aberration of the on-axis and off-axis points; the zoom lens group and the rear fixed lens group are appropriately complicated to reduce the image distortion of long and short focus, and reduce the lead of the moving component.

[0023] When imaging: the light passes through the first cemented group, positive crescent lens C113, positive crescent lens D114, plano-concave lens E121, the second cemented group, biconcave lens H124, biconvex lens I131, the third cemented group, plano-convex lens L134, the fourth cemented group, the fifth cemented group, the sixth cemented group, biconvex lens S147, and attenuation plate 15 from front to back to form an image.

[0024] The 20x wide dynamic high-definition zoom lens of the present invention is reasonably designed, realizing continuous zoom of a large target surface with a focal length of 24.2-518mm throughout the entire process, and can perform large-scale search, tracking video and ultra-high-definition photography of targets at long and short distances and high-speed movements, and is applied to scenes requiring unmanned monitoring, early warning, reconnaissance and strike, imaging guidance, etc.; a fog-penetrating band attenuation plate is provided at the rear end of the lens, so that the lens can adapt to the use requirements in harsh environments and broaden the application scenarios. At the same time, an electric cover opening mechanism is provided, and the whole machine is sealed, so that the lens can also be applied to field operation platforms such as forests, border defenses, and ships.

[0025] In this embodiment, lens parameters of the front fixed lens group 11, the variable power lens group 12, the compensation lens group 13 and the rear fixed lens group 14 are shown in the following table.

[0026]

[0027] like Figure 4As 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 in sequence along the incident light path, a front lens barrel 21 is provided inside the focusing main lens barrel 24, a zoom slide and a compensation slide are provided inside the main lens barrel, and a zoom lens barrel and a compensation lens barrel are provided on the zoom slide and the compensation slide, respectively; 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 lens barrel, the zoom lens barrel, the compensation lens barrel and the rear lens barrel.

[0028] In this embodiment, the mechanical structure of the lens further includes an electric cover opening mechanism 16, an electric focus adjustment mechanism 17, an electric zoom mechanism 18, an electric dimming mechanism 19, an electric attenuation plate switching mechanism 20, a detector camera 70 and a sealing cover 71. The detector camera is mounted on the rear group connecting tube, and the sealing cover 71 realizes the overall watertight function of the lens, and the rear group connecting tube is connected to the rear group connecting plate 51.

[0029] like Figure 5 , 6 As shown, the electric focusing mechanism realizes the focusing of the near and far targets, including the adjusting cam 24, the focusing motor 29, and the focusing motor gear 28. The focusing cam 24 is installed on the outside of the focusing main lens barrel 25 through the front precision steel ball 23 and the rear precision steel ball 27, and is pressed by the focusing cam pressing ring 22. The focusing lens barrel 21 is installed in the focusing main lens barrel 25 after grinding and matching with the focusing main lens barrel 25. The focusing cam 24 is milled with a linear inclined groove according to the requirements of the optical focusing stroke, and the focusing main lens barrel 25 is milled with a straight groove divided into three equal parts; the front lens barrel 21 is connected with the focusing cam 24 and the focusing main lens barrel 25 by three 120° evenly distributed focusing guide pins 25, and the focusing motor gear 28 is meshed with the gear on the focusing cam 24. When the focus motor 29 is powered on and rotates, driving the focus cam 24 to rotate, the rotational motion of the focus cam 24 is converted into the linear motion of the focus barrel 21 through the restriction of the straight groove on the focus main barrel 25, thereby realizing the focusing of the far and near targets. When focusing on the far and near targets, the focus potentiometer gear 210 drives the focus potentiometer 211 shaft to rotate by meshing with the focus cam 24, so that the resistance value of the focus potentiometer 211 changes. The change value of the focus potentiometer 211 can be read out through an appropriate sampling circuit and transmitted to the control center, thereby realizing the display of the focus distance value; conversely, by giving a command through the control center, the real-time control of the focus distance value can be realized.

[0030] like Figure 7 , 8As shown, the electric zoom mechanism realizes the continuous variable function of the system focal length, including a zoom cam 35 and a zoom motor 315. The zoom lens barrel 31 is installed on the zoom slide 32 by screws to form a zoom assembly; the compensation lens group 39 is installed on the compensation slide 310 by screws to form a compensation assembly. The zoom slide 32 and the compensation slide 310 are respectively installed in the main lens barrel 36 after grinding and matching with the main lens barrel 36. The zoom cam 35 is installed on the main lens barrel 36 through the front precision steel ball 33 and the rear precision steel ball 37, and is pressed by the zoom cam pressing ring 38 to form a rolling bearing structure, which converts the sliding friction when the zoom cam 35 rotates into rolling friction to reduce the friction force when the zoom cam 35 moves. The zoom cam 35 is milled with zoom and compensation curve grooves according to the requirements of the optical zoom motion equation, and then the zoom cam 35 is connected with the zoom slide 32 and the compensation slide 310 by the zoom guide pin 34 and the compensation guide pin 311. The gear 317 of the variable power motor and the gear 316 of the zoom potentiometer are meshed with the gears of the zoom cam 35 respectively. When the rotor of the variable power motor 315 performs positive and negative rotational motion, the precision potentiometer 314 and the zoom cam 35 rotate synchronously. The variable power slide 32 and the compensation slide 310 are driven to move according to the variable power and compensation curve grooves through the variable power and compensation curve grooves and the variable power guide pins 34 and the compensation guide pins 311. The two straight grooves on the main lens barrel 36 play the role of supporting the variable power guide pins 34 and the compensation guide pins 311, and convert the rotational motion of the zoom cam 35 into the linear motion of the variable power slide 32 and the compensation slide 310. The matching clearance between the variable power guide pins 34 and the compensation guide pins 311 and the curved grooves of the zoom cam 35 and the linear grooves of the main lens barrel 36 is strictly controlled to ensure that the variable power and compensation components slide smoothly and comfortably without jamming. In this way, the zoom motor 315 rotates to realize the zoom component and the compensation component to move forward and backward in a straight line according to the zoom motion equation, thereby realizing the continuous variable function of the system focal length. When the focal length of the system changes, the zoom potentiometer gear 316 meshes with the zoom cam 35 gear to rotate the zoom potentiometer 314, and the resistance value of the zoom potentiometer 314 changes. The change value of the zoom potentiometer 314 can be taken out through an appropriate sampling circuit and transmitted to the control center, thereby realizing the display of the focal length value; conversely, the control center gives a command to realize real-time control of the focal length.

[0031] like Fig. 9 , 10As shown, the electric dimming mechanism includes a light bar assembly 48 composed of a light bar pin and a light bar sheet. The movable pin end of the light bar assembly 48 is evenly installed in the hole of the light bar seat 41, and the light bar moving ring 43 is installed on the light bar seat 41. At the same time, the fixed pin end of the light bar assembly 48 needs to be evenly installed in the straight groove on the light bar moving ring 43, and the light bar moving ring pressure ring 42 is installed on the light bar seat 41 through a thread; the light bar seat 41 is milled according to the movable angle of the light bar sheet, and the light bar moving ring 43 cooperates with the light bar adjustment ring 47 through the light bar pin 45, and is locked with the light bar adjustment ring pressure ring 46 to ensure that the light bar adjustment ring 47 rotates smoothly without sticking. The light bar motor gear 44 is meshed with the gear on the light bar adjustment ring 47. When the light bar motor 411 is powered on, it drives the light bar adjustment ring 47 to rotate, and the light bar assembly 48 follows the rotation movement, so that the light bar opening size changes, realizing the variable function of the light bar.

[0032] like Fig.11 As shown, the electric attenuation sheet switching mechanism includes an attenuation sheet 15 and an attenuation sheet turntable 56. Four attenuation sheets of different specifications are loaded into the attenuation sheet turntable 56, which are 100% attenuation sheet 52, 50% attenuation sheet 55, 25% attenuation sheet 510, and 10% attenuation sheet 511. The attenuation sheet turntable 56 is fixed to the rear group connecting plate 51 through the attenuation sheet turntable shaft 53 to ensure that the attenuation sheet turntable 51 rotates smoothly without jamming. The attenuation sheet motor gear 58 is meshed with the attenuation sheet turntable 56 through the attenuation sheet passing wheel 57. When the attenuation sheet motor 59 is powered on, it drives the attenuation sheet turntable 51 to rotate, and the attenuation sheet Hall element plate 512 plays a limiting role, thereby realizing the cyclic switching requirements between attenuation sheets of different specifications.

[0033] like Fig.12 , 13 As shown, the electric cover opening mechanism includes a mirror cover 61 and a cover opening base located above the mirror cover 61, a turbine shaft 69 and a cover opening motor 65 are provided on the cover opening base, and both ends of the turbine shaft 69 are rotatably mounted on the cover opening base through bearings B68 and turbine bearing seats: a worm wheel 610 is provided on the turbine shaft 69, and a worm 63 meshing with the worm wheel 610 is rotatably mounted on the cover opening base through bearings A66. A driving wheel is installed on the motor shaft of the cover opening motor 65 to mesh with a driven wheel on the worm 63, and the worm 63 moves in a worm shaft system composed of the cover opening base and bearings A66, and the worm wheel 610 moves on a worm shaft system composed of the turbine shaft 69, bearings B68, and turbine bearing seats, and a pair of mechanical arms 62 are provided at both ends of the turbine shaft 69, and the mechanical arms 62 are connected to the mirror cover 61. The bearings are all dustproof to prevent dust from falling, improve the transmission performance of the bearings, and ensure smooth opening and closing of the mirror cover.

[0034] When the cover opening motor 65 rotates, the driving wheel 64 on the motor shaft drives the driven wheel on the worm 63 to rotate, thereby causing the worm 63 to rotate. The worm 63 meshes with the worm wheel 610, driving the worm wheel 610, and the turbine shaft 69 rotates and changes the rotation direction of the turbine shaft 69 by 105°, that is, the rotation direction of the worm wheel shaft 69 is perpendicular to the optical axis of the lens. The rotation of the turbine shaft 69 drives the mechanical arm 62 and the mirror cover 61 to open and close. Therefore, the positive and negative rotation of the cover opening motor drives the mirror cover to make an opening and closing movement.

[0035] Unless otherwise stated, any technical solution disclosed in the present invention disclosed above, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range, and any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many implementable numerical values. Since there are too many numerical values ​​to be exhaustive, the present invention discloses some numerical values ​​to illustrate the technical solution of the present invention, and the numerical values ​​listed above should not constitute a limitation on the scope of protection of the present invention.

[0036] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by integrated molding using a casting process) (except when it is obviously impossible to use an integrated molding process).

[0037] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the present invention include states or shapes that are approximate, similar, or close to them.

[0038] Any component provided by the present invention may be assembled from a plurality of separate components, or may be a separate component manufactured by an integral forming process.

[0039] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A 20x wide dynamic range high definition zoom lens, characterized by: The optical system of the lens comprises 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 lenses with optical power along the incident light path of the front fixed lens group are in sequence a first cemented group formed by closely bonding a negative crescent lens A and a biconvex lens B, a positive crescent lens C and a positive crescent lens D; the lenses with optical power along the incident light path of the zoom lens group are in sequence a plano-concave lens E, a second cemented group formed by closely bonding a biconcave lens F and a biconvex lens G, a biconvex lens C and a plano-concave lens E; concave lens H; the lenses with optical power along the incident light path of the compensation lens group are sequentially a biconvex lens I, a third cemented group consisting of a negative meniscus lens J and a biconvex lens K in close contact, and a plano-convex lens L; the lenses with optical power along the incident light path of the rear fixed lens group are sequentially a fourth cemented group consisting of a biconcave lens M and a biconvex lens N in close contact, a fifth cemented group consisting of a negative meniscus lens O and a biconvex lens P in close contact, a sixth cemented group consisting of a biconvex lens Q and a biconcave lens R in close contact, and a biconvex lens S.

2. The 20x wide dynamic range high definition zoom lens according to claim 1, characterized in that: The air space between the front fixed lens group and the variable magnification lens group is 3.4mm-109.4mm, the air space between the variable magnification lens group and the compensation lens group is 161.1mm-2.0mm, and the air space between the compensation lens group and the rear fixed lens group is 5.6mm-58.8mm.

3. The 20x wide dynamic range high definition zoom lens according to claim 1, characterized in that: The air gap between the first bonding group and the positive meniscus lens C is 0.2mm, and 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 bonding group is 6.8mm, and the air gap between the second bonding group and the biconcave lens H is 1.0mm; the air gap between the biconvex lens I and the third bonding group is 2.7mm, and the air gap between the third bonding group and the plano-convex lens L is 0.1mm; the air gap between the fourth bonding group and the fifth bonding group is 27.8mm, the air gap between the fifth bonding group and the sixth bonding group is 2.2mm, and the air gap between the sixth bonding group and the biconvex lens S is 28.5mm.

4. The 20x wide dynamic range high definition zoom lens according to claim 1, characterized in that: The mechanical structure of the lens comprises a focusing main lens barrel, a main lens barrel and a rear lens barrel which are arranged in sequence along the incident light path; a front lens barrel is arranged inside the focusing main lens barrel, a zoom slide and a compensating slide are arranged inside the main lens barrel, and a zoom lens barrel and a compensating lens barrel are respectively arranged on the zoom slide and the compensating slide; the front fixed lens group, the zoom lens group, the compensating lens group and the rear fixed lens group are respectively mounted on the front lens barrel, the zoom lens barrel, the compensating lens barrel and the rear lens barrel.

5. The 20x wide dynamic range high definition zoom lens according to claim 4, characterized in that: The mechanical structure of the lens also includes 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.

6. The 20x wide dynamic range high definition zoom lens according to claim 5, characterized in that: The electric cover opening mechanism includes a mirror cover and a cover opening base located above the mirror cover, a turbine shaft and a cover opening motor are provided on the cover opening base, and both ends of the turbine shaft are rotatably mounted on the cover opening base through bearings B and turbine bearing seats: a worm gear is provided on the turbine shaft, and a worm engaged with the worm gear is rotatably mounted on the cover opening base through bearings A; a driving wheel is installed on the motor shaft of the cover opening motor to engage with a driven wheel on the worm gear, and a pair of mechanical arms are provided at both ends of the turbine shaft, and the mechanical arms are connected to the mirror cover.

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