Large-target-surface shooting and ultra-high-definition continuous zoom lens

Abstract

The invention relates to a large-target-surface shooting dual-purpose ultra-high-definition continuous zoom lens, which comprises a front fixed lens group, a zoom lens group, a compensation lens group and a rear fixed lens group, and is characterized in that the front fixed lens group comprises a first gluing group, a positive meniscus lens C and a positive meniscus lens D which are sequentially arranged from left to right, wherein the first gluing group is formed by tightly connecting a negative meniscus lens A and a biconvex lens B; the zoom lens group comprises a negative meniscus lens E, a second gluing group formed by tightly connecting a biconcave lens F and a biconvex lens G, and a biconcave lens H which are sequentially arranged from left to right; the compensating lens group comprises a biconvex lens I, a third gluing group formed by tightly connecting a crescent lens J and a biconvex lens K, and a biconvex lens L which are sequentially arranged from left to right; and the rear fixed lens group comprises a plano-concave lens M, a positive meniscus lens N, a fourth gluing group formed by tightly connecting a negative meniscus lens O and a biconvex lens P, a negative meniscus lens Q, a negative meniscus lens R, and a fifth gluing group formed by tightly connecting a biconvex lens S and a negative meniscus lens T which are sequentially arranged from left to right. The lens realizes the dual purposes of continuous zooming and shooting, and is beneficial to widening the application scene.

Description

Technical Field

[0001] The invention relates to an ultra-high-definition continuous zoom lens for large-target-surface dual-purpose photography. Background Art

[0002] Compared with traditional visible light zoom optical lenses, optical lenses that can be used for both large-scale photography and large-scale shooting have greater advantages in practical application scenarios such as unmanned monitoring, early warning, reconnaissance and strike, and imaging guidance. They can perform real-time zoom tracking and video recording of targets and output large-scale ultra-high-definition photographic images. However, existing visible light zoom optical lenses limit their application scenarios. Summary of the invention

[0003] The purpose of the present invention is to provide an ultra-high-definition continuous zoom lens for large-target area dual-purpose photography, which realizes continuous zoom and photography, and helps to broaden the application scenarios.

[0004] The technical solution of the present invention is: an ultra-high-definition continuous zoom lens for dual-purpose use in large-target surface photography, the optical structure 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 from left to right along the incident direction of light, the front fixed lens group comprises a negative crescent lens A, a biconvex lens B, a positive crescent lens C, and a positive crescent lens D arranged in sequence from left to right, the negative crescent lens A and the biconvex lens B are closely connected to form a first cemented group; the zoom lens group comprises a negative crescent lens E, a biconcave lens F, a biconvex lens G, and a biconcave lens H arranged in sequence from left to right, the biconcave lens F and the biconvex lens G are arranged in sequence from left to right, The convex lens G is closely connected to form a second cemented group; the compensation lens group includes a double convex lens I, a negative meniscus lens J, a double convex lens K, and a double convex lens L, which are arranged in sequence from left to right, and the meniscus lens J and the double convex lens K are closely connected to form a third cemented group; the rear fixed lens group includes a plano-concave lens M, a positive meniscus lens N, a negative meniscus lens O, a double convex lens P, a negative meniscus lens Q, a negative meniscus lens R, a double convex lens S and a negative meniscus lens T, which are arranged in sequence from left to right, the negative meniscus lens O and the double convex lens P are closely connected to form a fourth cemented group, and the double convex lens S and the negative meniscus lens T are closely connected to form a fifth cemented group.

[0005] Furthermore, the air space between the front fixed lens group and the variable power lens group is 2.8mm-39.7mm, the air space between the variable power lens group and the compensation lens group is 69.5mm-2.1mm, and the air space between the compensation lens group and the rear fixed lens group is 4.2mm-34.7mm.

[0006] Furthermore, the air gap between the first bonding group and the positive meniscus lens C is 0.1 mm, and the air gap between the positive meniscus lens C and the positive meniscus lens D is 0.1 mm; the air gap between the negative meniscus lens E and the second bonding group is 7.4 mm, and the air gap between the second bonding group and the biconcave lens H is 1.4 mm.

[0007] Furthermore, the air gap between the biconvex lens I and the third bonding group is 0.1 mm, the air gap between the third bonding group and the biconvex lens L is 0.2 mm; the air gap between the plano-concave lens M and the positive meniscus lens N is 0.1 mm, the air gap between the positive meniscus lens N and the fourth bonding group is 9.2 mm, the air gap between the fourth bonding group and the negative meniscus lens Q is 9.2 mm, the air gap between the negative meniscus lens Q and the negative meniscus lens R is 8.4 mm, and the air gap between the negative meniscus lens R and the fifth bonding group is 4 mm.

[0008] Furthermore, the biconvex lens B, the positive meniscus lens C, the positive meniscus lens D, the biconvex lens K, and the biconvex lens S are all made of ultra-low dispersion optical glass.

[0009] Furthermore, a filter is arranged on the right side of the rear fixed lens group.

[0010] Furthermore, the mechanical structure of the lens includes a focusing barrel, a main barrel, a rear barrel and a filter connecting plate which are arranged in sequence from left to right; a front barrel is arranged inside the focusing barrel, a zoom slide and a compensation slide are arranged inside the main barrel, a zoom slide and a compensation slide are respectively provided on the zoom slide and the compensation slide, and a filter turntable is provided on the filter connecting plate; the front fixed lens group, the zoom lens group, the compensation lens group, the rear fixed lens group and the filter are correspondingly installed on the front barrel, the zoom lens group, the compensation lens group, the rear barrel and the filter connecting plate.

[0011] Furthermore, the lens also includes an electric focusing mechanism, an electric zoom mechanism, an electric filter switching mechanism and a detector camera assembly. The electric focusing mechanism selects 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 the zoom slide and the compensation slide to complete continuous zoom switching of the lens; the electric filter switching mechanism controls the rotation of the filter turntable; and the detector camera assembly is installed on the electric filter switching mechanism.

[0012] Furthermore, the electric focusing mechanism includes a focusing cam installed on the focusing barrel, and a focusing cam pressure ring for pressing the focusing cam is installed on the focusing barrel; a linear inclined groove is provided on the focusing cam, and a straight groove is provided on the focusing barrel; the focusing barrel is provided with three focusing guide pin assemblies that are evenly distributed at 120° and connect the front fixed lens group with the focusing cam and the focusing barrel, and a focusing motor is provided on the focusing barrel, and the focusing motor gear of the focusing motor is meshed with the gear on the focusing cam.

[0013] Furthermore, the electric filter switching mechanism includes two filters of different specifications arranged in a filter turntable, the filter turntable is fixed to the rear group connecting plate via the filter turntable shaft, a filter motor is installed on the rear group connecting plate, and the gear of the filter motor is meshed with the gear of the filter turntable via the filter wheel.

[0014] Compared with the prior art, the present invention has the following advantages: The lens is an ultra-high-definition continuous zoom lens with a focal length of 26.1-235mm for large-target photography. It can perform large-scale search, tracking video and ultra-high-definition photography of targets at both near and far distances, and is used in scenarios requiring unmanned monitoring, early warning, reconnaissance and strike, imaging guidance, and other applications. A fog-penetrating band filter is provided at the rear end of the lens, so that the lens can adapt to the requirements of use in harsh environments, while broadening the application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the optical structure of the present invention; Figure 2 It is a schematic diagram of the mechanical structure of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the electric focusing mechanism of the present invention; Figure 4 It is a side schematic diagram of the electric focusing mechanism of the present invention; Figure 5 It is a side schematic diagram of the electric zoom mechanism of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the electric zoom mechanism of the present invention; Figure 7 It is a schematic diagram of the structure of the electric filter switching mechanism of the present invention; In the figure: 11-front fixed lens group; 111-negative crescent lens A; 112-biconvex lens B; 113-positive crescent lens C; 114-positive crescent lens D; 12-variable lens group; 121-negative crescent lens E; 122-biconcave lens F; 123-biconvex lens G; 124-biconcave lens H; 13-compensating lens group; 131-biconvex lens I; 132-negative crescent lens J; 133-biconvex lens K; 134-biconvex lens L; 14-rear fixed lens group; 141-biconcave lens M; 142-biconvex lens N; 143-negative crescent lens O; 144-biconvex lens P; 145-biconvex lens Q; 146-biconcave lens R; 147-biconvex lens S; 15-filter; 151-first filter; 152-second filter; 16-electric cover opening mechanism; 17-electric focusing mechanism; 18-electric filter switching mechanism; 19-detector camera assembly; 21-focusing lens group; 22-focusing cam pressure ring; 23-focusing guide pin assembly; 24-focusing cam; 25-focusing lens barrel; 26-focusing micro switch; 27-focusing limit pin; 28-focusing motor gear; 29-focusing motor; 210-focusing potentiometer gear; 211-focusing potentiometer; 32-zoom slide; 33-front steel balls; 34-zoom guide pin assembly; 35-zoom cam; 36-main lens barrel; 37-rear steel balls; 38-zoom cam pressure ring; 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; 41-light barrier seat; 43-filter turntable shaft; 44-Hall element; 46-filter turntable; 47-filter motor gear; 48-filter wheel; 49-filter motor; 410-magnetic steel. DETAILED DESCRIPTION

[0016] In order to make the above features and advantages of the present invention more easily understood, embodiments are given below with reference to the accompanying drawings for detailed description, but the present invention is not limited thereto.

[0017] Example 1 Reference Figure 1 A large-target-surface dual-purpose ultra-high-definition continuous zoom lens, the optical structure of the lens comprises a front fixed lens group 11, a zoom lens group 12, a compensation lens group 13, and a rear fixed lens group 14 which are arranged in sequence from left to right along the incident direction of light, the front fixed lens group 11 comprises a negative crescent lens A111, a biconvex lens B112, a positive crescent lens C113, and a positive crescent lens D114 which are arranged in sequence from left to right, the negative crescent lens A111 and the biconvex lens B112 are closely connected to form a first cemented group; the zoom lens group 12 comprises a negative crescent lens E121, a biconcave lens F122, a biconvex lens G123, and a biconcave lens H124 which are arranged in sequence from left to right, the biconcave lens F122 and the biconvex lens G123 are closely connected to form a second bonding group; the compensation lens group 13 includes a biconvex lens I131, a negative meniscus lens J132, a biconvex lens K133, and a biconvex lens L134 which are arranged in sequence from left to right, and the meniscus lens J132 and the biconvex lens K133 are closely connected to form a third bonding group; the rear fixed lens group 14 includes a plano-concave lens M141, a positive meniscus lens N142, a negative meniscus lens O143, a biconvex lens P144, a negative meniscus lens Q145, a negative meniscus lens R146, a biconvex lens S147 and a negative meniscus lens T148 which are arranged in sequence from left to right, and the negative meniscus lens O143 and the biconvex lens P144 are closely connected to form a fourth bonding group, and the biconvex lens S147 and the negative meniscus lens T148 are closely connected to form a fifth bonding group.

[0018] In this embodiment, the air gap between the front fixed lens group 11 and the zoom lens group 12 is 2.8mm-39.7mm, the air gap between the zoom lens group 12 and the compensation lens group 13 is 69.5mm-2.1mm, and the air gap between the compensation lens group 13 and the rear fixed lens group 14 is 4.2mm-34.7mm.

[0019] In this embodiment, the air gap between the first bonding group and the positive meniscus lens C113 is 0.1 mm, and the air gap between the positive meniscus lens C113 and the positive meniscus lens D114 is 0.1 mm; the air gap between the negative meniscus lens E121 and the second bonding group is 7.4 mm, and the air gap between the second bonding group and the biconcave lens H124 is 1.4 mm.

[0020] In this embodiment, the air gap between the biconvex lens I131 and the third bonding group is 0.1 mm, and the air gap between the third bonding group and the biconvex lens L134 is 0.2 mm; the air gap between the plano-concave lens M141 and the positive meniscus lens N142 is 0.1 mm, the air gap between the positive meniscus lens N142 and the fourth bonding group is 9.2 mm, the air gap between the fourth bonding group and the negative meniscus lens Q145 is 9.2 mm, the air gap between the negative meniscus lens Q145 and the negative meniscus lens R146 is 8.4 mm, and the air gap between the negative meniscus lens R146 and the fifth bonding group is 4 mm.

[0021] In this embodiment, the biconvex lens B112, positive crescent lens C113, positive crescent lens D114, biconvex lens K133, and biconvex lens S147 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.

[0022] In this embodiment, a filter 15 is further disposed on the right side of the rear fixed lens group 14 .

[0023] In this embodiment, the optical system composed of the above lens group achieves the following optical indicators: Focal length: f′min=26.1mm, f′max=235mm; Relative aperture: D / f′=1 / 4.7; Field of view: 2.2°×1.2°~44°×24°; Total optical length: ∑L≤211.5mm; Variable magnification stroke: ≤37.0mm; The transmission spectrum of the filter: fog penetration 750 ~ 900nm.

[0024] In this embodiment, the initial structure of the positive group compensation is selected during the selection process. This structure is beneficial to reducing the system's secondary spectral aberrations and improving the imaging quality at long focus. The front fixed lens group 11 uses ultra-low dispersion materials (such as FCD100 and other materials) 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 point and the off-axis point; the variable magnification lens group 12 and the rear fixed lens group 14 are appropriately complicated to reduce the image distortion of long focus and short focus, and reduce the lead of the moving element.

[0025] When imaging: the light passes from left to right through the first cemented group, positive crescent lens C113, positive crescent lens D114, negative crescent lens E121, the second cemented group, biconcave lens H124, biconvex lens I131, the third cemented group, biconvex lens L134, plano-concave lens M141, positive crescent lens N142, the fourth cemented group, negative crescent lens Q145, negative crescent lens R146, the fifth cemented group, and filter U15 to form an image.

[0026] 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 Table 1 below.

[0027] Table 1 Example 2 Reference Figures 1 to 7 like Figure 2 As shown, in this embodiment, the mechanical structure of the lens includes a focusing barrel, a main barrel, a rear barrel and a filter connecting plate which are arranged in sequence from left to right, a front barrel is arranged inside the focusing barrel, a zoom slide and a compensation slide are arranged inside the main barrel, a zoom slide and a compensation slide are respectively provided on the zoom slide and the compensation slide, and a filter turntable is provided on the filter connecting plate; the front fixed lens group, the zoom lens group, the compensation lens group, the rear fixed lens group and the filter are correspondingly installed on the front barrel, the zoom lens group, the compensation lens group, the rear barrel and the filter connecting plate.

[0028] In this embodiment, the lens also includes an electric focusing mechanism 16, an electric zoom mechanism 17, an electric filter switching mechanism 18 and a detector camera assembly 19. The electric focusing mechanism selects the front fixed lens group 11 as the focusing movable group; the electric zoom mechanism 26 drives the zoom lens group 12 and the compensation lens group 13 to perform linear reciprocating motion through the zoom slide and the compensation slide to complete the continuous zoom switching of the lens; the electric filter switching mechanism 18 controls the rotation of the filter turntable; and the detector camera assembly 19 is installed on the electric filter switching mechanism 18.

[0029] like Figure 3 and Figure 4As shown, in this embodiment, the front fixed lens group 11 is installed in the focusing lens barrel 25 after being ground and matched with the focusing lens barrel 25. The electric focusing mechanism includes a focusing cam 24 installed on the focusing lens barrel 25, and a focusing cam pressing ring 22 for pressing the focusing cam 24 is installed on the focusing lens barrel 25. The focusing cam 24 is milled with a linear inclined groove according to optical requirements, and the focusing lens barrel 25 is provided with a straight groove. The focusing lens barrel 25 is provided with three focusing guide pin assemblies 23 that are evenly distributed at 120° and connect the front fixed lens group 11 with the focusing cam 24 and the focusing lens barrel 25 together. The focusing lens barrel 25 is provided with a focusing motor 29, and the focusing motor gear 28 of the focusing motor 29 is meshed with the gear on the focusing cam 24.

[0030] When the focusing motor 29 is powered on and rotates, driving the focusing cam 24 to rotate, the rotational motion of the focusing lens group 21 is converted into linear motion through the restriction of the straight groove on the focusing lens barrel 25, thereby realizing the focusing of the near and far targets. When focusing on the near and far targets, the focusing potentiometer gear 210 drives the focusing potentiometer 211 shaft to rotate by meshing with the focusing motor gear 28, so that the resistance value of the focusing potentiometer 211 changes. The change value of the focusing potentiometer 211 can be read out through an appropriate sampling circuit and transmitted to the control center, thereby realizing the display of the focusing distance value; conversely, by giving a command through the control center, the real-time control of the focusing distance value can be realized.

[0031] like Figure 5 and Figure 6 As shown, in this embodiment, the electric zoom mechanism: the zoom lens group 12 is installed on the zoom slide 32 by screws to form a zoom assembly; the compensation lens group 13 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, and the zoom cam 35 is installed on the main lens barrel 36 through the front and rear precision steel balls 33 and 37, and is pressed by the zoom cam pressure 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 assembly 34 and the compensation guide pin assembly 311. The zoom motor gear 317 and the zoom potentiometer gear 316 are respectively engaged with the zoom cam 35 gear.

[0032] When the rotor of the zoom motor 315 performs positive and negative rotational motion, the precision potentiometer 314 and the zoom cam 35 rotate synchronously. The zoom slide 32 and the compensation slide 310 are driven to move according to the zoom and compensation curve grooves through the zoom and compensation curve grooves and the zoom guide pin assembly 34 and the compensation guide pin assembly 311. The two straight grooves on the main lens barrel 36 play the role of supporting 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. 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 is strictly controlled to ensure that the zoom and compensation components slide smoothly and comfortably without jamming. In this way, the zoom motor 315 rotates to realize the zoom assembly and the compensation assembly to make forward and backward linear motion 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 precision potentiometer 314, and the resistance value of the precision 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 commands through the control center, real-time control of the focal length can be realized.

[0033] like Figure 7 As shown, in this embodiment, the electric filter switching mechanism includes two first filters 151 and second filters 152 of different specifications arranged in the filter turntable 46. The filter turntable 46 is fixed to the rear group connecting plate 41 via the filter turntable shaft 43 to ensure that the filter turntable 46 rotates smoothly without jamming. A filter motor 49 is installed on the rear group connecting plate 41, and the gear of the filter motor 49 is meshed with the gear of the filter turntable 46 via the filter wheel 48. When the filter motor 49 is powered on, it drives the filter turntable 46 to rotate, and the micro switch 44 plays a limiting role, thereby realizing the requirement of switching back and forth between filters of different specifications.

[0034] The above description is only a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, it does not require creative labor to design different forms of large-target dual-purpose ultra-high-definition continuous zoom lenses for photography. Without departing from the principles and spirit of the present invention, all equal changes, modifications, substitutions and variations made within the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A large-area dual-purpose ultra-high-definition continuous zoom lens, characterized in that: The optical structure of the lens comprises a front fixed lens group, a zoom lens group, a compensating lens group, and a rear fixed lens group which are arranged in sequence from left to right along the incident direction of light, wherein the front fixed lens group comprises a negative meniscus lens A, a biconvex lens B, a positive meniscus lens C, and a positive meniscus lens D which are arranged in sequence from left to right, and the negative meniscus lens A and the biconvex lens B are closely connected to form a first cemented group; the zoom lens group comprises a negative meniscus lens E, a biconcave lens F, a biconvex lens G, and a biconcave lens H which are arranged in sequence from left to right, and the biconcave lens F and the biconvex lens G are closely connected to form a second cemented group; The compensation lens group includes a biconvex lens I, a negative meniscus lens J, a biconvex lens K, and a biconvex lens L arranged in sequence from left to right, and the meniscus lens J and the biconvex lens K are closely connected to form a third cemented group; the rear fixed lens group includes a plano-concave lens M, a positive meniscus lens N, a negative meniscus lens O, a biconvex lens P, a negative meniscus lens Q, a negative meniscus lens R, a biconvex lens S and a negative meniscus lens T arranged in sequence from left to right, the negative meniscus lens O and the biconvex lens P are closely connected to form a fourth cemented group, and the biconvex lens S and the negative meniscus lens T are closely connected to form a fifth cemented group.

2. The large-surface dual-purpose ultra-high-definition continuous 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 2.8mm-39.7mm, the air space between the variable magnification lens group and the compensation lens group is 69.5mm-2.1mm, and the air space between the compensation lens group and the rear fixed lens group is 4.2mm-34.7mm.

3. The large-surface dual-purpose ultra-high-definition continuous zoom lens according to claim 1 or 2, characterized in that: The air gap between the first bonding group and the positive meniscus lens C is 0.1 mm, and the air gap between the positive meniscus lens C and the positive meniscus lens D is 0.1 mm; the air gap between the negative meniscus lens E and the second bonding group is 7.4 mm, and the air gap between the second bonding group and the biconcave lens H is 1.4 mm.

4. The large-area dual-purpose ultra-high-definition continuous zoom lens for photographing according to claim 3, characterized in that: The air gap between the biconvex lens I and the third bonding group is 0.1mm, and the air gap between the third bonding group and the biconvex lens L is 0.2mm; the air gap between the plano-concave lens M and the positive meniscus lens N is 0.1mm, the air gap between the positive meniscus lens N and the fourth bonding group is 9.2mm, the air gap between the fourth bonding group and the negative meniscus lens Q is 9.2mm, the air gap between the negative meniscus lens Q and the negative meniscus lens R is 8.4mm, and the air gap between the negative meniscus lens R and the fifth bonding group is 4mm.

5. The large-surface dual-purpose ultra-high-definition continuous zoom lens according to claim 1, 2 or 4, characterized in that: The biconvex lens B, the positive meniscus lens C, the positive meniscus lens D, the biconvex lens K and the biconvex lens S are all made of optical glass with ultra-low dispersion.

6. The large-surface dual-purpose ultra-high-definition continuous zoom lens according to claim 1, 2 or 4, characterized in that: A filter is also arranged on the right side of the rear fixed lens group.

7. The large-area dual-purpose ultra-high-definition continuous zoom lens according to claim 6, characterized in that: The mechanical structure of the lens includes a focusing barrel, a main barrel, a rear barrel and a filter connecting plate which are arranged in sequence from left to right; a front barrel is arranged inside the focusing barrel, a zoom slide and a compensation slide are arranged inside the main barrel, a zoom slide and a compensation slide are arranged on the zoom slide and the compensation slide respectively, and a filter turntable is arranged on the filter connecting plate; the front fixed lens group, the zoom lens group, the compensation lens group, the rear fixed lens group and the filter are correspondingly installed on the front barrel, the zoom lens group, the compensation lens group, the rear barrel and the filter connecting plate.

8. The large-area dual-purpose ultra-high-definition continuous zoom lens for photographing according to claim 7, characterized in that: The lens also includes an electric focusing mechanism, an electric zoom mechanism, an electric filter switching mechanism and a detector camera assembly. 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 the zoom slide and the compensation slide to complete continuous zoom switching of the lens; the electric filter switching mechanism controls the rotation of the filter turntable; and the detector camera assembly is installed on the electric filter switching mechanism.

9. The large-area dual-purpose ultra-high-definition continuous zoom lens for photographing according to claim 8, characterized in that: The electric focusing mechanism includes a focusing cam installed on the focusing barrel, a focusing cam pressure ring for pressing the focusing cam is installed on the focusing barrel; a linear inclined groove is provided on the focusing cam, and a straight groove is provided on the focusing barrel; three focusing guide pin assemblies are evenly distributed at 120° on the focusing barrel and connect the front fixed lens group with the focusing cam and the focusing barrel; a focusing motor is provided on the focusing barrel, and the focusing motor gear of the focusing motor is meshed with the gear on the focusing cam.

10. The large-surface dual-purpose ultra-high-definition continuous zoom lens according to claim 8 or 9, characterized in that: The electric filter switching mechanism includes two filters of different specifications arranged in a filter turntable, the filter turntable is fixed to a rear group connecting plate via a filter turntable shaft, a filter motor is installed on the rear group connecting plate, and the gear of the filter motor is meshed with the gear of the filter turntable via a filter wheel.

Images