Large-target-surface long-focal-length two-variable high-definition zoom lens and imaging method thereof

Abstract

The invention relates to a large-target-surface long-focal-length two-variable high-definition zoom lens and an imaging method thereof. The large-target-surface long-focal-length two-variable high-definition zoom lens comprises a lens body, and an optical system of the lens body is composed of a front fixed lens set, a zoom lens set, a compensation lens set and a rear fixed lens set which are sequentially arranged from left to right in the light incidence direction. The system is reasonable in design, realizes a continuous zoom closed-loop control function, a focusing closed-loop control function, a focal length feedback function and an image output function, can perform large-range search and tracking camera shooting on targets with far and near distances and high-speed movement, and is applied to requirements of unmanned monitoring, early warning, marginal and coast defense and the like.

Description

Technical Field

[0001] The invention relates to a large-target-surface, long-focal-length, dual-variable high-definition zoom lens and an imaging method thereof. Background Art

[0002] In the visible light imaging system, an optical lens with precise long focal length zoom, high precision, and stable image during operation is required. It can also be applied to a wide temperature range. Compared with traditional zoom optical lenses, it has greater advantages in practical application scenarios such as unmanned monitoring, early warning, border and coastal defense. It can perform real-time zoom tracking and video recording of the target and output a stable and clear image. However, when the existing long focal length optical lenses are working, the focal length is not long enough, the target surface is not large enough, and it is impossible to zoom in real time, which limits its application scenarios. In view of this, this case was born. Summary of the invention

[0003] The present invention improves the above-mentioned problem, that is, the technical problem to be solved by the present invention is to provide a large-target-area long-focal-length dual-variable high-definition zoom lens and an imaging method thereof, which has a reasonable design and can realize continuous zooming of a large target area from 300mm to 1100mm, thus broadening the application scenarios.

[0004] The present invention is constructed as follows. It includes a lens. 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 from left to right along the incident direction of light; the front fixed lens group is composed of a double convex lens A, a positive crescent lens B and a first cemented group arranged in sequence from left to right, and the first cemented group is formed by a negative crescent lens C and a positive crescent lens D in close contact; the zoom lens group is composed of a second cemented group and a negative crescent lens H arranged in sequence from left to right, and the second cemented group is composed of a negative crescent lens E, a double convex lens B and a positive crescent lens D in close contact; F is formed by closely bonding the biconcave lens G; the compensating lens group is composed of a biconvex lens I, a third cemented group and a positive meniscus lens L arranged in sequence from left to right, and the third cemented group is formed by closely bonding the negative meniscus lens J and the biconvex lens K; the rear fixed lens group is composed of a biconcave lens M, a plano-convex lens N, a fourth cemented group, a negative meniscus lens Q, a fifth cemented group and a filter T arranged in sequence from left to right, the fourth cemented group is formed by closely bonding the biconcave lens O and the biconvex lens P, and the fifth cemented group is formed by closely bonding the negative meniscus lens R and the biconvex lens S.

[0005] Furthermore, the air space between the front fixed lens group and the variable magnification lens group is 55.7mm-93.3mm, the air space between the variable magnification lens group and the compensation lens group is 73mm-1.7mm, and the air space between the compensation lens group and the rear fixed lens group is 25.4mm-61.1mm.

[0006] Furthermore, the air gap between the biconvex lens A and the positive meniscus lens B is 0.7 mm, and the air gap between the positive meniscus lens B and the first bonding group is 2.1 mm; the air gap between the second bonding group and the negative meniscus lens H is 5.0 mm, and the air gap between the biconvex lens I and the third bonding group is 0.2 mm; the air gap between the third bonding group and the positive meniscus lens L is 0.1 mm, and the air gap between the biconcave lens M and the plano-convex lens N is 0.1 mm; the air gap between the plano-convex lens N and the fourth bonding group is 78.1 mm, the air gap between the fourth bonding group and the negative meniscus lens Q is 3.1 mm, and the air gap between the negative meniscus lens Q and the fifth bonding group is 14.9 mm.

[0007] Furthermore, the lens is provided with a focusing main lens barrel, a main lens barrel and a rear lens barrel in sequence from left to right, a front lens barrel is provided inside the focusing main lens barrel, a magnification slide and a compensation slide are provided inside the main lens barrel, and a magnification lens barrel and a compensation lens barrel are provided on the magnification slide and the compensation slide, respectively; 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 lens also includes an electric focusing mechanism, an electric zoom mechanism, a rear fixed component and a detector camera component. The electric focusing mechanism selects a front fixed lens group as a focusing movable group; the electric zoom mechanism drives the magnification lens group and the compensation lens group to perform linear reciprocating motion through the magnification slide and the compensation slide respectively to complete continuous zoom switching of the lens; the detector camera component is installed on the rear fixed lens group.

[0009] Furthermore, the electric focusing mechanism includes a focusing lens group, a focusing cam and a plurality of focusing guide pin assemblies arranged in the focusing main lens barrel. The focusing cam is installed on the focusing main lens barrel using a focusing cam pressure ring. The focusing cam has a linear bevel groove, and the focusing main lens barrel is provided with a straight groove. The focusing guide pin assembly is used to connect the focusing lens group, the focusing cam and the focusing main lens barrel together. A focusing motor gear meshing with the focusing cam is arranged on the outside of the focusing cam. The focusing motor gear is driven to rotate by the focusing motor. A potentiometer and a potentiometer gear are also arranged on the outside of the focusing cam.

[0010] Furthermore, the electric zoom mechanism includes a zoom cam, a magnification guide pin assembly and a compensation guide pin assembly arranged on the main lens barrel, the zoom cam rotates in coordination with the main lens barrel, the magnification lens group is installed on the magnification slide by screws to form a magnification assembly, and the compensation lens group is installed on the compensation slide by screws to form a compensation assembly. The main lens barrel is provided with a magnification straight groove and a compensation straight groove, and the zoom cam is respectively provided with a magnification curve groove and a compensation curve groove. The magnification guide pin assembly and the compensation guide pin assembly connect the zoom cam with the magnification slide and the compensation slide through the magnification curve groove and the compensation curve groove, respectively. A magnification motor gear and a zoom potentiometer gear are respectively provided on the outside of the zoom cam, and the magnification motor gear and the zoom potentiometer gear are respectively meshed with the zoom cam. The magnification motor gear is driven to rotate by the magnification motor, and the zoom potentiometer gear is connected to the zoom potentiometer, and the zoom potentiometer rotates synchronously with the zoom cam.

[0011] Furthermore, the positive meniscus lens B and the biconvex lens K are made of ultra-low dispersion optical glass.

[0012] Furthermore, an imaging method of two variable high-definition zoom lenses with a large target surface and a long focal length is provided, characterized in that light passes through a biconvex lens A, a positive crescent lens B, a first cemented group, a second cemented group, a negative crescent lens H, a biconvex lens I, a third cemented group, a positive crescent lens L, a biconcave lens M, a plano-convex lens N, a fourth cemented group, a negative crescent lens Q, a fifth cemented group, and a filter T from left to right to form an image.

[0013] Compared with the prior art, the present invention has the following beneficial effects: the present invention has a reasonable design and realizes continuous zoom of a large target surface with a focal length of 291-1119mm. It can perform large-scale search, tracking and video recording of targets at long and short distances and in high-speed motion, and is applicable to scenes requiring unmanned monitoring, early warning, border and coastal defense, etc. The lens has a wide temperature adaptability range, which broadens the application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the optical structure of the lens of the embodiment of the present invention; Figure 2 is a schematic diagram of the mechanical structure of a lens according to an embodiment of the present invention; Figure 3 is a telephoto MTF diagram of the lens of the embodiment of the present invention; Figure 4 is a short-focus MTF diagram of the lens of the embodiment of the present invention; Figure 5 Schematic diagram of the electric focusing mechanism of the lens of the embodiment of the present invention Figure 1 ; Figure 6 Schematic diagram of the electric focusing mechanism of the lens of the embodiment of the present invention Figure 2 ; Figure 7 Schematic diagram of the electric zoom mechanism of the lens of the embodiment of the present invention Figure 1 ; Figure 8 Schematic diagram of the electric zoom mechanism of the lens of the embodiment of the present invention Figure 2 .

[0015] In the figure: 11-front fixed lens group; 111-biconvex lens A; 112-positive crescent lens B; 113-negative crescent lens C; 114-positive crescent lens D; 12-variable lens group; 121-negative crescent lens E; 122-biconvex lens F; 123-biconcave lens G; 124-negative crescent lens H; 13-compensating lens group; 131-biconvex lens I; 132-negative crescent lens J; 133-biconvex lens K; 134-positive crescent lens L; 14-rear fixed lens group; 141-biconcave lens M; 142-plano-convex lens N; 143-biconcave lens O; 144-biconvex lens P; 145-negative crescent lens Q; 146-negative crescent lens R; 147-biconvex lens S; 148-filter T; 16-electric focusing mechanism; 17-electric zoom mechanism; 18-rear fixing group; 19-detector camera assembly; 21-focus lens group; 22-focus cam pressure ring; 23-front row of steel balls; 24-focus cam; 25-focus guide pin assembly; 26-rear row of steel balls; 27-focus main lens barrel; 28-focus motor; 29-focus micro switch; 210-focus motor gear; 211-limit bracket; 212-focus potentiometer; 213-focus potentiometer gear; 31-zoom lens group; 32-zoom slide; 33-front precision steel ball; 34-zoom guide pin assembly; 35-zoom cam; 36-main lens barrel; 37-rear precision steel ball; 38-zoom cam pressure ring; 39-compensation lens group; 310-compensation slide; 311-compensation guide pin assembly; 312-zoom micro switch; 313-zoom limit pin; 314-zoom potentiometer; 315-zoom motor; 316-zoom potentiometer gear; 317-zoom motor gear. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Example 1: Figure 1-8 As shown, in this embodiment, a large target surface long focal length dual variable high-definition zoom lens is provided, including a lens, the optical system of the lens is composed of 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 from left to right along the incident direction of light; The front fixed lens group 11 is composed of a biconvex lens A111, a positive meniscus lens B112 and a first cemented group arranged in sequence from left to right, wherein the first cemented group is formed by a negative meniscus lens C113 and a positive meniscus lens D114 being closely bonded; The zoom lens group 12 is composed of a second cemented group and a negative meniscus lens H124 arranged in sequence from left to right, wherein the second cemented group is formed by a negative meniscus lens E121, a biconvex lens F122 and a biconcave lens G123 being closely bonded; The compensation lens group 13 is composed of a biconvex lens I131, a third cemented group and a positive meniscus lens L134 arranged in sequence from left to right, and the third cemented group is formed by a negative meniscus lens J132 and a biconvex lens 133K being closely connected; The rear fixed mirror group 14 is composed of a biconcave lens M141, a plano-convex lens N142, a fourth cemented group, a negative meniscus lens Q145, a fifth cemented group and a filter T148, which are arranged in sequence from left to right. The fourth cemented group is formed by a biconcave lens O143 and a biconvex lens P144 in close contact, and the fifth cemented group is formed by a negative meniscus lens R146 and a biconvex lens S147 in close contact.

[0018] In the embodiment of the present invention, the air gap between the front fixed lens group 11 and the zoom lens group 12 is 55.7mm-93.3mm, the air gap between the zoom lens group 12 and the compensation lens group 13 is 73mm-1.7mm, and the air gap between the compensation lens group 13 and the rear fixed lens group 14 is 25.4mm-61.1mm.

[0019] In the embodiment of the present invention, the air gap between the biconvex lens A and the positive meniscus lens B is 0.7 mm, and the air gap between the positive meniscus lens B and the first bonding group is 2.1 mm; the air gap between the second bonding group and the negative meniscus lens H is 5.0 mm, and the air gap between the biconvex lens I and the third bonding group is 0.2 mm; the air gap between the third bonding group and the positive meniscus lens L is 0.1 mm, and the air gap between the biconcave lens M and the plano-convex lens N is 0.1 mm; the air gap between the plano-convex lens N and the fourth bonding group is 78.1 mm, the air gap between the fourth bonding group and the negative meniscus lens Q is 3.1 mm, and the air gap between the negative meniscus lens Q and the fifth bonding group is 14.9 mm.

[0020] In the embodiment of the present invention, the positive meniscus lens B and the biconvex lens K are made of ultra-low dispersion optical glass. By selecting the ultra-low dispersion optical glass material, the chromatic aberration of the system is reduced and the system resolution is improved.

[0021] In the embodiment of the present invention, when imaging: light passes through the biconvex lens A, the positive meniscus lens B, the first cemented group, the second cemented group, the negative meniscus lens H, the biconvex lens I, the third cemented group, the positive meniscus lens L, the biconcave lens M, the plano-convex lens N, the fourth cemented group, the negative meniscus lens Q, the fifth cemented group, and the filter T from left to right to form an image.

[0022] Embodiment 2: Based on Embodiment 1, in this embodiment, the optical technical indicators achieved by the optical system of the lens are as follows: Focal length: f′min=291mm, f′max=1119mm; Relative aperture: 1 / 10.2~1 / 12.2 The horizontal field of view covers 3.16° to 1.3°; Total optical length ∑L≤400mm; Variable magnification stroke ≤35.6mm.

[0023] In the embodiment of the present invention, an initial structure of positive group compensation is selected during model selection, which is beneficial to reducing aberrations such as the secondary spectrum of the system and improving the imaging quality at long focus; ultra-low dispersion materials (such as H-FK61 and other materials) are used in the front fixed group to further reduce the secondary spectral aberrations of the system 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 point and the off-axis point; the zoom group and the rear fixed group are appropriately complicated to reduce the image distortion of long focus and short focus, and reduce the lead of the moving component.

[0024] In this embodiment, specific design parameters of each lens (front fixed lens group 11, variable magnification lens group 12, compensation lens group 13 and rear fixed lens group 14) used in the optical system are shown in Table 1 below:

[0025] Table 1 Example 3: On the basis of Example 1, in the embodiment of the present invention, the lens is provided with a focusing main lens barrel, a main lens barrel and a rear lens barrel from left to right in sequence, a front lens barrel is provided inside the focusing main lens barrel, a magnification slide and a compensation slide are provided inside the main lens barrel, a magnification slide and a compensation slide are provided on the magnification slide and the compensation slide, respectively; 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.

[0026] In an embodiment of the present invention, the lens also includes an electric focusing mechanism 16, an electric zoom mechanism 17, a rear fixed assembly 18 and a detector camera assembly 19. The electric focusing mechanism selects a front fixed lens group as a focusing movable group; the electric zoom mechanism drives the magnification lens group and the compensation lens group to perform linear reciprocating motion through a magnification slide and a compensation slide respectively to complete continuous zoom switching of the lens; the detector camera assembly is installed on the rear fixed lens group.

[0027] In the embodiment of the present invention, Figure 5 , 6 As shown, the electric focusing mechanism includes a focusing lens group, a focusing cam and a plurality of focusing guide pin assemblies arranged in the focusing main lens barrel. The focusing cam is installed on the focusing main lens barrel by using a focusing cam pressure ring. The focusing cam has a linear bevel groove, and the focusing main lens barrel is provided with a straight groove. The focusing guide pin assembly is used to connect the focusing lens group, the focusing cam and the focusing main lens barrel together. A focusing motor gear meshing with the focusing cam is arranged outside the focusing cam, and the focusing motor gear is driven to rotate by the focusing motor. A potentiometer and a potentiometer gear are also arranged outside the focusing cam.

[0028] The electric focusing mechanism uses lenses of the front fixed group of the optical system to form a focusing lens group 21. The focusing lens group 21 is installed in the focusing main lens barrel 27 after being ground and matched with the focusing main lens barrel 27. The focusing cam 24 is installed on the focusing main lens barrel 27 and is pressed by a focusing cam pressing ring 22. The focusing cam 24 is milled with a linear inclined groove according to optical requirements, and the focusing main lens barrel 27 is milled with a straight groove. The focusing lens group 21 is connected to the focusing cam 24 and the focusing main lens barrel 27 by three 120° evenly distributed focusing guide pin assemblies 25, and the focusing motor gear 210 is meshed with the gear on the focusing cam 24.

[0029] When the focus motor 28 is powered on and rotates, driving the focus cam 24 to rotate, the rotational motion of the focus lens group 21 is converted into linear motion through the restriction of the straight groove on the focus main lens barrel 27, thereby realizing the focus of the near and far targets. When focusing on the near and far targets, the focus potentiometer gear 213 drives the axis of the focus potentiometer 212 to rotate by meshing with the gear part on the periphery of the focus cam and the focus motor gear 210, so that the resistance value of the focus potentiometer 212 changes. The change value of the focus potentiometer 212 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] A limit bracket 211 is also provided on the main lens barrel, and a focus micro switch 29 is provided on the limit bracket 211 .

[0031] In the embodiment of the present invention, Figure 7 , 8As shown, the electric zoom mechanism includes a zoom cam, a magnification guide pin assembly and a compensation guide pin assembly arranged on the main lens barrel, the zoom cam rotates in coordination with the main lens barrel, the magnification lens group 31 is installed on the magnification slide 32 by screws to form a magnification assembly, and the compensation lens group 39 is installed on the compensation slide 310 by screws to form a compensation assembly, the main lens barrel is provided with a magnification straight groove and a compensation straight groove, the zoom cam is respectively provided with a magnification curve groove and a compensation curve groove, the magnification guide pin assembly and the compensation guide pin assembly respectively connect the zoom cam with the magnification slide and the compensation slide through the magnification curve groove and the compensation curve groove, the outside of the zoom cam is respectively provided with a magnification motor gear and a zoom potentiometer gear, the magnification motor gear and the zoom potentiometer gear are respectively meshed with the zoom cam, the magnification motor gear is driven to rotate by the magnification motor, the zoom potentiometer gear is connected to the zoom potentiometer, and the zoom potentiometer rotates synchronously with the zoom cam.

[0032] The main lens barrel is provided with a zoom micro switch 312 and a zoom limit pin 313 .

[0033] The above-mentioned zoom slide 32 and compensation slide 310 are respectively installed in the main lens barrel 36 after being ground and matched 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 tightened by the zoom cam pressure ring 38 to form a rolling bearing structure, which converts the sliding friction of the zoom cam 35 during rotation into rolling friction, so as to reduce the friction force of the zoom cam 35 during movement.

[0034] 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 assembly 34 and the compensation guide pin assembly 311.

[0035] The power-changing motor gear 317 and the zoom potentiometer gear 316 are respectively meshed with the gears of the zoom cam 35. When the rotor of the power-changing motor 315 rotates positively and negatively, the zoom potentiometer 314 rotates synchronously with the zoom cam 35. The power-changing slide 32 and the compensation slide 310 are driven to move according to the power-changing and compensation curve grooves through the power-changing and compensation curve grooves and the power-changing guide pin assembly 34 and the compensation guide pin assembly 311.

[0036] The two straight grooves (the zoom straight groove and the compensation straight groove) on the main lens barrel 36 support the zoom guide pin assembly 34 and the compensation guide pin assembly 311, and convert the rotational motion of the zoom slide 32 and the compensation slide 310 into linear motion. By strictly controlling the matching clearance between the zoom guide pin assembly 34 and the compensation guide pin assembly 311 and the curved groove of the zoom cam 35 and the linear groove of the main lens barrel 36, the sliding of the zoom and compensation assemblies is ensured to be smooth, comfortable and without jamming.

[0037] The zoom motor 315 rotates to make the zoom component and the compensation component 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 precision zoom potentiometer 314 changes. The change value of the precision 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, by giving a command through the control center, the real-time control of the focal length can be realized.

[0038] 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.

[0039] At the same time, if the above-mentioned invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by 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 one-piece molding using a casting process) (except when it is obviously impossible to use an integrated molding process).

[0040] If the words "first", "second" and so on are used in this article to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of description to distinguish the components. Unless otherwise stated, the above words have no special meaning.

[0041] 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.

[0042] 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.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A large-surface, long-focal-length, dual-variable high-definition zoom lens, characterized in that: 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 from left to right along the incident direction of light; the front fixed lens group is composed of a biconvex lens A, a positive crescent lens B and a first cemented group arranged in sequence from left to right, the first cemented group is formed by a negative crescent lens C and a positive crescent lens D in close contact; the zoom lens group is composed of a second cemented group and a negative crescent lens H arranged in sequence from left to right, the second cemented group is composed of a negative crescent lens E, a biconvex lens F and a biconcave lens The compensating lens group is composed of a double convex lens I, a third cemented group and a positive meniscus lens L arranged in sequence from left to right, and the third cemented group is composed of a negative meniscus lens J and a double convex lens K in close contact; the rear fixed lens group is composed of a double concave lens M, a plano-convex lens N, a fourth cemented group, a negative meniscus lens Q, a fifth cemented group and a filter T arranged in sequence from left to right, the fourth cemented group is composed of a double concave lens O and a double convex lens P in close contact, and the fifth cemented group is composed of a negative meniscus lens R and a double convex lens S in close contact.

2. The large-surface-size, long-focal-length, dual-variable 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 55.7mm-93.3mm, the air space between the variable magnification lens group and the compensation lens group is 73mm-1.7mm, and the air space between the compensation lens group and the rear fixed lens group is 25.4mm-61.1mm.

3. A large-surface-size, long-focal-length, dual-variable high-definition zoom lens according to claim 1 or 2, characterized in that: The air gap between the biconvex lens A and the positive meniscus lens B is 0.7mm, and the air gap between the positive meniscus lens B and the first bonding group is 2.1mm; the air gap between the second bonding group and the negative meniscus lens H is 5.0mm, and the air gap between the biconvex lens I and the third bonding group is 0.2mm; the air gap between the third bonding group and the positive meniscus lens L is 0.1mm, and the air gap between the biconcave lens M and the plano-convex lens N is 0.1mm; the air gap between the plano-convex lens N and the fourth bonding group is 78.1mm, the air gap between the fourth bonding group and the negative meniscus lens Q is 3.1mm, and the air gap between the negative meniscus lens Q and the fifth bonding group is 14.9mm.

4. The large-surface-size, long-focal-length, dual-variable high-definition zoom lens according to claim 1, characterized in that: The lens is provided with a focusing main lens barrel, a main lens barrel and a rear lens barrel in sequence from left to right; a front lens barrel is provided inside the focusing main lens barrel, a zoom slide and a compensating slide are provided inside the main lens barrel, and a zoom lens barrel and a compensating lens barrel are provided on the zoom slide and the compensating slide respectively; 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 large-surface-size, long-focal-length, dual-variable high-definition zoom lens according to claim 4, characterized in that: The lens also includes an electric focusing mechanism, an electric zoom mechanism, a rear fixed component and a detector camera component. The electric focusing mechanism uses a front fixed lens group as a focusing movable group; the electric zoom mechanism drives the zoom lens group and the compensation lens group to perform linear reciprocating motion through a zoom slide and a compensation slide respectively to complete continuous zoom switching of the lens; the detector camera component is installed on the rear fixed lens group.

6. The large-surface-size, long-focal-length, dual-variable high-definition zoom lens according to claim 5, characterized in that: The electric focusing mechanism includes a focusing lens group, a focusing cam and a plurality of focusing guide pin assemblies arranged in the focusing main lens barrel. The focusing cam is installed on the focusing main lens barrel by using a focusing cam pressure ring. The focusing cam has a linear inclined groove, and the focusing main lens barrel is provided with a straight groove. The focusing guide pin assembly is used to connect the focusing lens group, the focusing cam and the focusing main lens barrel together. A focusing motor gear meshing with the focusing cam is arranged outside the focusing cam, and the focusing motor gear is driven to rotate by the focusing motor. A potentiometer and a potentiometer gear are also arranged outside the focusing cam.

7. The large-surface-size, long-focal-length, dual-variable high-definition zoom lens according to claim 5, characterized in that: The electric zoom mechanism includes a zoom cam, a magnification guide pin assembly and a compensation guide pin assembly arranged on the main lens barrel. The zoom cam rotates in coordination with the main lens barrel. The magnification lens group is installed on the magnification slide by screws to form a magnification assembly. The compensation lens group is installed on the compensation slide by screws to form a compensation assembly. The main lens barrel is provided with a magnification straight groove and a compensation straight groove. The zoom cam is respectively provided with a magnification curve groove and a compensation curve groove. The magnification guide pin assembly and the compensation guide pin assembly connect the zoom cam with the magnification slide and the compensation slide through the magnification curve groove and the compensation curve groove respectively. The outside of the zoom cam is respectively provided with a magnification motor gear and a zoom potentiometer gear, which are respectively meshed with the zoom cam. The magnification motor gear is driven to rotate by the magnification motor. The zoom potentiometer gear is connected to the zoom potentiometer, and the zoom potentiometer rotates synchronously with the zoom cam.

8. The large-surface-size, long-focal-length, dual-variable high-definition zoom lens according to claim 1, characterized in that: The positive meniscus lens B and the biconvex lens K are made of ultra-low dispersion optical glass.

9. An imaging method using a large target surface and long focal length dual variable high-definition zoom lens as claimed in any one of claims 1 to 8, characterized in that: The light passes through the biconvex lens A, positive meniscus lens B, the first cemented group, the second cemented group, the negative meniscus lens H, the biconvex lens I, the third cemented group, the positive meniscus lens L, the biconcave lens M, the plano-convex lens N, the fourth cemented group, the negative meniscus lens Q, the fifth cemented group, and the filter T from left to right to form an image.

Images