A U-shaped turning 25.3 times wide-spectrum fog-penetrating high-definition continuous zoom lens

Abstract

The present invention relates to a U-shaped, 25.3x wide-spectrum, fog-penetrating, high-definition, continuous zoom lens. The lens comprises a front fixed lens group consisting of a biconvex lens A, a positive meniscus lens B, a negative meniscus lens C, and a positive meniscus lens D, all bonded together in a first cemented group. The zoom lens group comprises a negative meniscus lens E, a biconcave lens F, and a positive meniscus lens G, all bonded together in a second cemented group, and a negative meniscus lens H. The compensating lens group comprises a biconvex lens I, a negative meniscus lens J, and a biconvex lens K, all bonded together in a third cemented group, and a positive meniscus lens L. The lens comprises a first rear fixed lens group consisting of a biconcave lens M and a positive meniscus lens N, all bonded together in a fourth cemented group. The lens comprises a second rear fixed lens group consisting of a negative meniscus lens O and a biconvex lens P, all bonded together in a fifth cemented group, and a negative meniscus lens Q and a positive meniscus lens R. The lens is capable of tracking and detecting distant targets at long focal lengths and conducting wide-range searches at short focal lengths. It is suitable for applications such as tracking and detecting, early warning, border and coastal defense, forest fire prevention, and imaging guidance. The lens is adaptable to use in harsh environments.

Description

Technical Field

[0001] The invention relates to a U-shaped turn 25.3 times wide spectrum fog-penetrating high-definition continuous zoom lens. Background Art

[0002] In visible light imaging systems, the longer the focal length, the greater the detection and identification distance. At the same time, the greater the zoom ratio, the more application scenarios. Compared with short-focal-length, low-zoom-ratio zoom lenses, they offer greater advantages in practical applications such as tracking and reconnaissance, early warning, border and coastal defense, forest fire prevention, and imaging guidance. Long focal lengths allow for tracking and reconnaissance of distant targets, while short focal lengths allow for wide-area searches. This project was born out of this. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a U-shaped turn 25.3 times wide spectrum fog-penetrating high-definition continuous zoom lens.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a U-shaped turn 25.3 times wide spectrum fog-proof high-definition continuous zoom lens, the optical system of the lens includes a front fixed lens group, a magnification lens group, a compensation lens group, a variable light barrier, a first rear fixed lens group, a first reflector, a second rear fixed lens group, a second reflector and a filter, which are arranged in sequence from left to right along the incident direction of light. The front fixed lens group includes a first cemented group of biconvex lens A, a positive crescent lens B, a negative crescent lens C and a positive crescent lens D, which are arranged in sequence from left to right; the magnification lens group includes The lens group includes, from left to right, a negative meniscus lens E, a second cemented group of biconcave lens F and a positive meniscus lens G in close contact, and a negative meniscus lens H; the compensation lens group includes, from left to right, a biconvex lens I, a third cemented group of negative meniscus lens J and a biconvex lens K in close contact, and a positive meniscus lens L; the first rear fixed lens group includes, from left to right, a fourth cemented group of biconcave lens M and a positive meniscus lens N in close contact; the second rear fixed lens group includes, from left to right, a fifth cemented group of negative meniscus lens O and a biconvex lens P in close contact, a negative meniscus lens Q and a positive meniscus lens R.

[0005] Preferably, the air gap between the front fixed lens group and the zoom lens group is 3.5mm-89.9mm, the air gap between the zoom lens group and the compensation lens group is 133.1mm-2.0mm, and the air gap between the compensation lens group and the first rear fixed lens group is 5.3mm-50.1mm.

[0006] Preferably, the air gap between the biconvex lens A and the positive meniscus lens B is 0.6 mm, and the air gap between the positive meniscus lens B and the first cemented group is 7.3 mm; the air gap between the negative meniscus lens E and the second cemented group is 2.8 mm, and the air gap between the second cemented group and the negative meniscus lens H is 1.5 mm; the air gap between the biconvex lens I and the third cemented group is 0.1 mm, and the air gap between the third cemented group and the positive meniscus lens L is 0.1 mm; the air gap between the fourth cemented group and the fifth cemented group is 47.7 mm, the air gap between the fifth cemented group and the negative meniscus lens Q is 0.1 mm, and the air gap between the negative meniscus lens Q and the positive meniscus lens R is 25.0 mm.

[0007] Preferably, the biconvex lens A, the positive meniscus lens B, the positive meniscus lens D, the biconvex lens K, and the positive meniscus lens L are all made of ultra-low dispersion optical glass.

[0008] Preferably, the mechanical structure of the lens includes a focusing main lens barrel, a main lens barrel, a light barrier seat and a rear lens barrel arranged 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, the first rear fixed lens group and the second rear fixed lens group are respectively installed on the front lens barrel, the magnification lens barrel, the compensation lens barrel, the light barrier seat and the rear lens barrel.

[0009] Preferably, the lens first passes through a first reflector to fold the light path of the second rear fixed lens group 90°, and then passes through a second reflector to fold the rear end light 90° in the opposite direction, finally realizing a U-shaped turn of the light path.

[0010] Preferably, the mechanical structure of the lens also includes an electric focusing mechanism, an electric zoom mechanism, an electric light barrier mechanism, an electric mist-penetrating switching mechanism and a high-definition CMOS detector assembly. The electric focusing mechanism selects a front fixed lens group as a focusing moving 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 the continuous zoom switching of the lens; the electric light barrier mechanism is connected to the main lens barrel, and the electric light barrier mechanism controls the rotation of the light barrier piece; the electric mist-penetrating switching mechanism is connected to the rear lens barrel, and the electric mist-penetrating switching mechanism controls the rotation of the filter turntable; the high-definition CMOS detector assembly is installed on the electric mist-penetrating switching mechanism.

[0011] Compared with the existing technology, the present invention has the following beneficial effects: the present invention has a reasonable design and realizes continuous zoom of focal length 21.8mm-552mm. It can track and detect distant targets in the long focal length and conduct large-scale search in the short focal length. It can be applied to tracking and detection, early warning, border and coastal defense, forest fire prevention, imaging guidance and other demand scenarios; a fog-proof and laser filter is provided at the rear end of the lens, so that the lens can adapt to the use requirements in harsh environments, while broadening the application scenarios.

[0012] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the optical structure of the lens in an embodiment of the present invention;

[0014] Figure 2 is a schematic diagram of the mechanical structure of a lens in an embodiment of the present invention;

[0015] Figure 3 1 is a schematic diagram of the appearance structure of a lens in an embodiment of the present invention;

[0016] Figure 4 The structure of the electric focusing mechanism in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0017] Figure 5 The structure of the electric focusing mechanism in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0018] Figure 6 The structure of the electric zoom mechanism in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0019] Figure 7 The structure of the electric zoom mechanism in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0020] Figure 8 This is a schematic diagram of the structure of the electric light barrier mechanism in the embodiment of the present invention. Figure 1 ;

[0021] Figure 9 This is a schematic diagram of the structure of the electric light barrier mechanism in the embodiment of the present invention. Figure 2 ;

[0022] Figure 10 This is a schematic diagram of the structure of the electric mist-penetrating switching mechanism in an embodiment of the present invention. Figure 1 ;

[0023] Figure 11 This is a schematic diagram of the structure of the electric mist-penetrating switching mechanism in an embodiment of the present invention. Figure 2 .

[0024] exist Figure 1 middle:

[0025] 11-Front fixed lens group; 111-Biconvex lens A; 112-Positive meniscus lens B; 113-Negative meniscus lens C; 114-Positive meniscus lens D; 12-Zoom lens group; 121-Negative meniscus lens E; 122-Biconcave lens F; 123-Positive meniscus lens G; 124-Negative meniscus lens H; 13-Compensating lens group; 131-Biconvex lens I; 132-Negative meniscus lens J; 133-Biconvex lens K; 134-Positive meniscus lens L; 14-Variable aperture; 15-First rear fixed lens group; 151-Biconcave lens M; 152-Positive meniscus lens N; 153-First reflecting mirror; 16-Second rear fixed lens group; 161-Negative meniscus lens O; 162-Biconvex lens P; 163-Negative meniscus lens Q; 164-Positive meniscus lens R; 165-Second reflecting mirror; 17-Filter;

[0026] exist Figure 2-3 middle:

[0027] 18-electric focusing mechanism; 19-electric zoom mechanism; 20-electric light barrier mechanism; 201-electric mist-penetrating switching mechanism; 202-high-definition CMOS detector assembly;

[0028] exist Figure 6-11 middle:

[0029] 21-focusing lens group; 22-focusing cam pressure ring; 23-focusing front steel balls; 24-focusing main lens barrel; 25-focusing guide pin assembly; 26-focusing cam; 27-focusing rear steel balls; 28-focusing motor; 29-focusing limit switch; 210-focusing motor gear; 211-focusing limit pin; 212-focusing potentiometer gear; 213-focusing potentiometer; 31-zooming lens group; 32-zooming slide; 33-zooming front steel balls; 34-zooming guide pin assembly; 35-zooming cam; 36-main lens barrel; 37-rear steel balls; 38-zooming cam pressure ring; 39-compensating lens group; 310-compensating slide; 311-compensating guide pin assembly; 312-zoom limit switch; 313-zooming limit Pin; 314-zoom potentiometer; 315-zoom motor; 316-zoom potentiometer gear; 317-zoom motor gear; 41-light barrier seat; 42-light barrier dynamic ring pressure ring; 43-light barrier dynamic ring; 44-light barrier guide pin; 45-light barrier assembly; 46-light barrier potentiometer; 47-light barrier motor; 48-light barrier potentiometer gear; 49-light barrier motor gear; 410 light barrier limit switch; 51-rear group connecting plate; 52-visible light filter; 53-filter turntable shaft; 54-filter Hall switch; 55-near-infrared filter; 56-filter turntable; 57-filter motor gear; 58-filter pulley; 59-filter motor; 510-filter magnet; 511-laser filter. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] 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 meaning as commonly understood by those skilled in the art to which the present application belongs.

[0032] 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, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] like Figures 1 to 11As shown, this embodiment provides a U-shaped turn 25.3x wide spectrum fog-penetrating high-definition continuous zoom lens. The optical system of the lens includes a front fixed lens group, a zoom lens group, a compensating lens group, a variable light barrier, a first rear fixed lens group, a first reflector, a second rear fixed lens group, a second reflector, and a filter, which are arranged in sequence from left to right along the incident direction of light. The front fixed lens group includes a first cemented group of biconvex lens A, a positive crescent lens B, a negative crescent lens C, and a positive crescent lens D, which are arranged in sequence from left to right; the zoom lens group includes a first cemented group of biconvex lens A, a positive crescent lens B, a negative crescent lens C, and a positive crescent lens D, which are arranged in sequence from left to right. The second cemented group, consisting of a negative meniscus lens E, a biconcave lens F, and a positive meniscus lens G, is arranged in sequence, and is bonded to each other; the compensating lens group includes, from left to right, a biconvex lens I, a negative meniscus lens J, and a biconvex lens K, which are bonded to each other; and a positive meniscus lens L. The first rear fixed lens group includes, from left to right, a biconcave lens M and a positive meniscus lens N, which are bonded to each other; and the second rear fixed lens group includes, from left to right, a negative meniscus lens O and a biconvex lens P, which are bonded to each other; a negative meniscus lens Q; and a positive meniscus lens R. The technical problem to be solved by the present invention is to provide a U-shaped, 25.3x wide-spectrum, fog-penetrating, high-definition, continuous zoom lens with a rational design that achieves 25.3x wide-spectrum, fog-penetrating, high-definition, continuous zoom, broadening its application scenarios.

[0034] In an embodiment of the present invention, the air gap between the front fixed lens group and the zoom lens group is 3.5mm-89.9mm, the air gap between the zoom lens group and the compensation lens group is 133.1mm-2.0mm, and the air gap between the compensation lens group and the first rear fixed lens group is 5.3mm-50.1mm.

[0035] In an embodiment of the present invention, the air gap between the biconvex lens A and the positive meniscus lens B is 0.6 mm, and the air gap between the positive meniscus lens B and the first cemented group is 7.3 mm; the air gap between the negative meniscus lens E and the second cemented group is 2.8 mm, and the air gap between the second cemented group and the negative meniscus lens H is 1.5 mm; the air gap between the biconvex lens I and the third cemented group is 0.1 mm, and the air gap between the third cemented group and the positive meniscus lens L is 0.1 mm; the air gap between the fourth cemented group and the fifth cemented group is 47.7 mm, the air gap between the fifth cemented group and the negative meniscus lens Q is 0.1 mm, and the air gap between the negative meniscus lens Q and the positive meniscus lens R is 25.0 mm.

[0036] In this embodiment of the present invention, the biconvex lens A, positive meniscus lens B, positive meniscus lens D, biconvex lens K, and positive meniscus lens L are all made of ultra-low dispersion optical glass. By selecting ultra-low dispersion optical glass as the positive lens material, the system's chromatic aberration is reduced and the system resolution is improved.

[0037] In an embodiment of the present invention, the mechanical structure of the lens includes a focusing main lens barrel, a main lens barrel, a light barrier seat and a rear lens barrel, which are arranged 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, the first rear fixed lens group and the second rear fixed lens group are respectively installed on the front lens barrel, the magnification lens barrel, the compensation lens barrel, the light barrier seat and the rear lens barrel,

[0038] In an embodiment of the present invention, the lens first passes through a first reflector to fold the light path of the second rear fixed lens group 90°, and then passes through a second reflector to fold the rear end light 90° in the opposite direction, finally realizing a U-shaped turn of the light path.

[0039] In an embodiment of the present invention, the mechanical structure of the lens also includes an electric focusing mechanism 18, an electric zoom mechanism 19, an electric light barrier mechanism 20, an electric mist-penetrating switching mechanism 201 and a high-definition CMOS detector assembly 202. The electric focusing mechanism 18 selects a front fixed lens group as a focusing movable group; the electric zoom mechanism 19 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 electric light barrier mechanism is connected to the main lens barrel, and the electric light barrier mechanism controls the rotation of the light barrier plate; the electric mist-penetrating switching mechanism is connected to the rear lens barrel, and the electric mist-penetrating switching mechanism controls the rotation of the filter turntable; the high-definition CMOS detector assembly is installed on the electric mist-penetrating switching mechanism.

[0040] like Figure 4 、 5As shown, the electric focusing mechanism utilizes a fixed front lens group of the optical system to form the focusing lens assembly 21. The focusing lens assembly 21 is assembled into the main focusing lens barrel 24 after being ground and fitted. A focusing cam 26 is mounted on the main focusing lens barrel 24 via a front row of focusing steel balls 23 and a rear row of focusing steel balls 27. The focusing cam is then compressed by a focusing cam pressure ring 22, forming a rolling bearing structure. The focusing cam 26 is milled with linear bevel grooves according to optical requirements, while the main focusing lens barrel 24 is milled with straight grooves. Three focusing guide pin assemblies 25, evenly spaced 120° apart, connect the focusing lens assembly 21, the focusing cam 26, and the main focusing lens barrel 24. A focusing motor gear 210 meshes with a gear on the focusing cam 26. When the focusing motor 28 is powered on and rotates, driving the focusing cam 26, the straight grooves on the main focusing lens barrel 24 constrain the rotational motion of the focusing lens assembly 21 to linear motion, thereby achieving focus on both near and far objects. When focusing on near or far targets, the focus potentiometer gear 212 drives the focus potentiometer 213 shaft to rotate by meshing with the gear on the focus cam 26, causing the resistance value of the focus potentiometer 213 to change. The changed value of the focus potentiometer 213 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 commands through the control center, real-time control of the focus distance value can be realized.

[0041] like Figure 6 、 7As shown, in the electric zoom mechanism, the zoom lens assembly 31 is screwed onto the zoom carriage 32, forming the zoom assembly; the compensating lens assembly 39 is screwed onto the compensating carriage 310, forming the compensating assembly. The zoom carriage 32 and the compensating carriage 310 are each ground to fit within the main barrel 36 and then installed within it. The zoom cam 35 is mounted on the main barrel 36 using front and rear precision steel balls 33 and 37, respectively. The zoom cam pressure ring 38 compresses the cam, forming a rolling bearing structure that converts sliding friction during rotation into rolling friction, reducing friction during the movement of the zoom cam 35. The zoom cam 35 is milled with zoom and compensation curve grooves, respectively, as required by the optical zoom motion equation. The zoom guide pin assembly 34 and the compensation guide pin assembly 311 connect the zoom cam 35 to the zoom carriage 32 and the compensating carriage 310. The zoom motor gear 317 and the zoom potentiometer gear 316 mesh with the zoom cam 35. When the rotor of the zoom motor 315 rotates positively and negatively, the precision potentiometer 314 and the zoom cam 35 rotate synchronously. The zoom and compensation curved grooves, along with the zoom guide pin assemblies 34 and 311, drive the zoom slide 32 and 310 to move along the zoom and compensation curved grooves. Two straight grooves in the main lens barrel 36 support the zoom guide pin assemblies 34 and 311 and convert the rotational motion of the zoom slide 32 and 310 into linear motion. Strictly controlled clearances between the zoom guide pin assemblies 34 and 311, the curved grooves of the zoom cam 35, and the linear grooves of the main lens barrel 36 ensure smooth, comfortable movement of the zoom and compensation assemblies without binding. This rotation of the zoom motor 315 ensures the forward and backward linear motion of the zoom and compensation assemblies according to the zoom motion equations, thereby achieving continuous focal length adjustment. When the focal length of the system changes, the zoom potentiometer gear 316 engages with the zoom cam 35 gear to rotate the precision potentiometer 314, and the resistance value of the precision potentiometer 314 changes. The changed 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, real-time control of the focal length can be realized.

[0042] like Figure 8 、 9As shown, in the electric light barrier mechanism, the light barrier pins and light barrier pieces form a light barrier piece assembly 45. The fixed pin ends of the light barrier piece assembly 45 are evenly installed in the holes of the light barrier seat 41. The light barrier ring 43 is installed on the light barrier seat 41. At the same time, the movable pin ends of the light barrier piece assembly 45 are evenly installed in the straight grooves of the light barrier ring 43. The light barrier ring pressure ring 42 is threadedly mounted on the light barrier seat 41. The light barrier seat 41 is milled with a clearance groove corresponding to the movable angle of the light barrier piece. The light barrier ring 43 is equipped with a light barrier guide pin 44. The light barrier motor gear 49 meshes with the gear on the light barrier ring 43 through a pulley. When the light barrier motor 47 is powered, it drives the light barrier ring 43 to rotate, and the light barrier piece assembly rotates accordingly, thereby changing the light barrier opening size and realizing the continuous light barrier size adjustment function. When the size of the light bar changes, the light bar potentiometer gear 48 engages with the light bar motor gear 49 to rotate the shaft of the light bar potentiometer 46, and the resistance value of the light bar potentiometer 46 changes. The changed value of the light bar potentiometer 46 can be taken out through an appropriate sampling circuit and transmitted to the control center, thereby realizing real-time control of the light bar size.

[0043] like Figure 10 、 11 As shown, the electric mist-penetrating switching mechanism: the visible light filter 52, the infrared filter 55 and the laser filter 511 are respectively Figure 11 The filter disc 56 is installed in the position shown. The disc is fixed to the rear assembly connecting plate 51 via the disc shaft 53, ensuring smooth and non-binding rotation. The gears of the filter motor 59 mesh with the gears of the filter disc 56 via the filter pulley 58. When the filter motor 59 is powered, it drives the disc 56 to rotate. The filter Hall switch 54 acts as a limiter, enabling cyclic switching between the visible light filter 52, infrared filter 55, and laser filter 511, ultimately achieving fog and laser light transmission requirements. A slot in the rear assembly barrel connects to the CMOS detector assembly, controlling the positional accuracy of the CMOS detector target surface during adjustment. This limits the freedom of the lens during overall debugging, ensuring efficient lens debugging.

[0044] In the embodiment of the present invention, the optical system composed of the above lens group achieves the following optical indicators:

[0045] Focal length: f′min=21.8mm, f′max=552mm;

[0046] Relative aperture D / f′: 1 / 4.7~1 / 6;

[0047] Field of view: 22.42°×12.72°~0.89°×0.50°;

[0048] Total optical length ∑L≤357.5mm;

[0049] Zoom stroke ≤86.4mm;

[0050] Working band: 400nm~1064nm.

[0051] In an embodiment of the present invention, the optical design of the front fixed lens group is complicated and ED (extra-low dispersion) optical glass is selected. This improves the optical power carrying capacity of the front fixed lens group, which has the highest on-axis light height, and effectively reduces aberrations such as secondary spectrum of the optical lens. This enables the lens to image over a wide spectral range and significantly improves resolution, making it compatible with ultra-high-definition CMOS detectors.

[0052] In the embodiment of the present invention, when forming an image: the light passes through the biconvex lens A111, the positive meniscus lens B112, the first cemented group, the negative meniscus lens E121, the second cemented group, the negative meniscus lens H124 from left to right; the biconvex lens I131, the third cemented group, the positive meniscus lens L134; the fourth cemented group, the first reflecting mirror 153; the fifth cemented group, the negative meniscus lens Q163, the positive meniscus lens R164, and the second reflecting mirror 165 to form an image.

[0053] In the embodiment of the present invention, the lens parameters of the front fixed lens group 11, the variable magnification lens group 12, the compensating lens group 13, the first rear fixed lens group 15 and the second rear fixed lens group 16 are shown in the following table.

[0054]

[0055]

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other manner. Any person skilled in the art may utilize the above-disclosed technical content to modify or modify the present invention into equivalent embodiments. However, any simple modifications, equivalent variations, and modifications to the above embodiments that do not depart from the technical content of the present invention and are based on the technical essence of the present invention remain within the scope of protection of the present invention.

Claims

1. A U-turn 25.3x wide-spectrum, fog-penetrating, high-definition, continuous zoom lens, featuring: The optical system of the lens is composed of a front fixed lens group, a zoom lens group, a compensating lens group, a variable light barrier, a first rear fixed lens group, a first reflector, a second rear fixed lens group, a second reflector and a filter, which are arranged in sequence from left to right along the incident direction of light. The front fixed lens group is composed of a first cemented group of a biconvex lens A, a positive meniscus lens B, a negative meniscus lens C and a positive meniscus lens D, which are arranged in sequence from left to right; the zoom lens group is composed of a second cemented group of a negative meniscus lens E, a biconcave lens F and a positive meniscus lens G, which are arranged in sequence from left to right, and a negative meniscus lens H; the compensating lens group is composed of a first cemented group of a negative meniscus lens E, a positive meniscus lens G and a negative meniscus lens H, which are arranged in sequence from left to right; The lens group consists of a third cemented group consisting of a biconvex lens I, a negative meniscus lens J, and a biconvex lens K, which are arranged in sequence from left to right, and a positive meniscus lens L; the first rear fixed lens group consists of a fourth cemented group consisting of a biconcave lens M and a positive meniscus lens N, which are arranged in sequence from left to right, and a negative meniscus lens Q and a positive meniscus lens R. The biconvex lens A, the positive meniscus lens B, the positive meniscus lens D, the biconvex lens K, and the positive meniscus lens L are all made of ultra-low dispersion optical glass.

2. The U-turn 25.3x wide-spectrum, fog-penetrating, high-definition, continuous zoom lens according to claim 1, characterized by: The air gap between the front fixed lens group and the zoom lens group is 3.5mm-89.9mm, the air gap between the zoom lens group and the compensation lens group is 133.1mm-2.0mm, and the air gap between the compensation lens group and the first rear fixed lens group is 5.3mm-50.1mm.

3. The U-turn 25.3x wide spectrum fog-penetrating high-definition continuous zoom lens according to claim 1, characterized by: The air gap between the biconvex lens A and the positive meniscus lens B is 0.6 mm, and the air gap between the positive meniscus lens B and the first cemented group is 7.3 mm; the air gap between the negative meniscus lens E and the second cemented group is 2.8 mm, and the air gap between the second cemented group and the negative meniscus lens H is 1.5 mm; the air gap between the biconvex lens I and the third cemented group is 0.1 mm, and the air gap between the third cemented group and the positive meniscus lens L is 0.1 mm; the air gap between the fourth cemented group and the fifth cemented group is 47.7 mm, the air gap between the fifth cemented group and the negative meniscus lens Q is 0.1 mm, and the air gap between the negative meniscus lens Q and the positive meniscus lens R is 25.0 mm.

4. The U-turn 25.3x wide-spectrum, fog-penetrating, high-definition, continuous zoom lens according to claim 1, characterized by: The mechanical structure of the lens includes a focusing main lens barrel, a main lens barrel, a light barrier seat and a rear lens barrel, which are arranged in sequence from left to right. A front lens barrel is provided inside the focusing main lens barrel, 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, the first rear fixed lens group and the second rear fixed lens group are respectively installed on the front lens barrel, the zoom lens barrel, the compensation lens barrel, the light barrier seat and the rear lens barrel.

5. The U-turn 25.3x wide spectrum fog-penetrating high-definition continuous zoom lens according to claim 1, characterized by: The lens first passes through the first reflector to fold the light path of the second rear fixed lens group 90 degrees, and then passes through the second reflector to fold the rear end light 90 degrees in the opposite direction, finally realizing a U-shaped turn of the light path.

6. The U-turn 25.3x wide spectrum fog-penetrating high-definition continuous zoom lens according to claim 4, characterized in that: The mechanical structure of the lens also includes an electric focusing mechanism, an electric zoom mechanism, an electric light barrier mechanism, an electric mist-penetrating switching mechanism and a high-definition CMOS detector assembly. The electric focusing mechanism uses 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 electric light barrier mechanism is connected to the main lens barrel, and the electric light barrier mechanism controls the rotation of the light barrier piece; the electric mist-penetrating switching mechanism is connected to the rear lens barrel, and the electric mist-penetrating switching mechanism controls the rotation of the filter turntable; the high-definition CMOS detector assembly is installed on the electric mist-penetrating switching mechanism.

Images