An optical lens and an imaging device

Abstract

Embodiments of the present invention disclose an optical lens and an imaging device, including a lens support cylinder. An optical lens group, a distance adjustment structure, a common filter lens, a first accommodation cavity, an infrared filter lens, a second accommodation cavity, an infrared filter lens, and a lens mode replacement structure are provided inside the lens support cylinder. The lens mode replacement structure can extract the common filter lens into the first accommodation cavity, and at the same time, extract the infrared filter lens from the second accommodation cavity and combine it with the optical lens group. The lens mode replacement structure can also extract the infrared filter lens into the second accommodation cavity, and at the same time, extract the common filter lens from the first accommodation cavity and combine it with the optical lens group, so as to realize common optical imaging and infrared imaging, and change the distance between each optical lens through the distance adjustment structure to achieve high-quality imaging under all weather conditions.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of lens devices, and particularly to an optical lens and an imaging device. Background Art

[0002] With the rapid development of science and technology, people have a higher level of understanding of security, and surveillance cameras have emerged accordingly. In recent years, surveillance cameras have become a major force in the security industry, driving the continuous progress and rapid development of the security industry. The types of lenses have become increasingly rich with the continuous expansion of the security market.

[0003] Existing optical lenses are generally divided into ordinary optical lenses and infrared lenses. Ordinary optical lenses can only work during the day and cannot work in the dark without auxiliary light sources. Infrared lenses have better imaging capabilities at night, but their imaging quality is poor during the day. Although some optical lenses combine the two, due to the different wavelengths of light used by ordinary optical lenses and infrared lenses, they often can only focus on the day or the night and cannot achieve all-weather imaging with good quality. Summary of the Invention

[0004] Therefore, embodiments of the present invention provide an optical lens and an imaging device to solve the problem in the prior art that due to the different wavelengths of light used by ordinary optical lenses and infrared lenses, all-weather imaging with good quality cannot be achieved.

[0005] To achieve the above object, the embodiments of the present invention provide the following technical solutions:

[0006] In a first aspect, the present invention provides an optical lens, including a lens support barrel, in which an optical lens group is provided, and a

[0007] distance adjustment structure for adjusting the positions of the optical lenses in the optical lens group and the distances between adjacent optical lenses;

[0008] an ordinary filter lens for filtering light with wavelengths outside the visible light range during the day and in high-brightness environments;

[0009] a first accommodation cavity for accommodating the ordinary filter lens;

[0010] an infrared filter lens for filtering light with wavelengths outside the infrared range at night and in low-brightness environments;

[0011] a second accommodation cavity for accommodating the infrared filter lens;

[0012] The lens mode replacement structure is used to extract the ordinary filter lens into the first accommodation cavity, and at the same time, extract the infrared filter lens from the second accommodation cavity to be combined with the optical lens group; and is used to extract the infrared filter lens into the second accommodation cavity, and at the same time, extract the ordinary filter lens from the first accommodation cavity to be combined with the optical lens group.

[0013] The lens support cylinder includes a lens barrel, a tail seat connected to the rear end of the lens barrel, and a support connected to the lower end of the lens barrel. The inside of the lens barrel and the tail seat is hollow and communicates with each other. The optical lens group is arranged in the lens barrel. The first accommodation cavity and the second accommodation cavity are symmetrically arranged on the left and right side walls of the inner cavity of the tail seat.

[0014] The distance adjustment structure is arranged in the lens barrel. The distance adjustment structure includes a plurality of lens frames for fixing optical lenses. The lens frames are circular rings, and the outer walls of the lens frames are in contact with the inner wall of the lens barrel. A plurality of distance adjustment screws are axially penetrated through the lens frames. The plurality of distance adjustment screws are evenly spaced on the lens frames. The lens frames and the distance adjustment screws correspond one by one, and the corresponding lens frames and the distance adjustment screws are threadedly connected. The two ends of the distance adjustment screw are respectively fixed at the two ends of the lens barrel, and one end of the distance adjustment screw is connected with a fine adjustment motor.

[0015] The lens mode replacement structure is arranged in the tail seat. The lens mode replacement structure includes a circumferential chute and a radial chute arranged at the top of the inner cavity of the tail seat. The circumferential chute is perpendicular to the axis of the lens barrel. The radial chute is located between the lens barrel and the circumferential chute, and the radial chute is vertically connected to the circumferential chute. The two ends of the circumferential chute respectively extend into the first accommodation cavity and the second accommodation cavity. Two sliding seats are arranged in the circumferential chute. A steering motor is arranged on the sliding seat. The output shaft of the steering motor is vertically downward and connected with a rectangular fixed frame. The ordinary filter lens and the infrared filter lens are respectively installed in the two fixed frames.

[0016] A limit seat is arranged at the midpoint of the circumferential chute. The left sliding seat is in an "L" shape. When the sliding seat contacts the limit seat, the left fixed frame is exactly located at the vertical center of the tail seat. The right sliding seat is in a shape. When the sliding seat contacts the limit seat, the right fixed frame is exactly located at the vertical center of the tail seat.

[0017] A pressing cylinder is provided at the end of the tailstock. The output end of the pressing cylinder is connected to a fixing ring. A plurality of pressing rods are provided on the surface of the fixing ring facing the lens barrel. Pressing groove holes corresponding to the ends of the pressing rods are provided on the fixing frame. The pressing groove holes are non-through holes and are provided with magnetic attractions for attracting the pressing rods.

[0018] Sliding fixing strips are provided on the pressing rods. The edges of the sliding fixing strips are wavy. Sliding card slots corresponding to the sliding fixing strips are provided on the fronts of the two cross bars of the fixing frame.

[0019] The present invention also provides an imaging device, including any one of the optical lenses in the first aspect and an imaging element for converting the optical image formed by the optical lens into an electrical signal.

[0020] As a preferred solution of the present invention,

[0021] The embodiments of the present invention have the following advantages:

[0022] 1. With minor improvements to the existing optical lens group, the present invention realizes ordinary optical imaging and infrared imaging. Ordinary optical imaging can be used in daytime and high-brightness environments, and infrared imaging can be used in nighttime and low-brightness environments. Each has its own target, thus achieving high-quality imaging all day long.

[0023] 2. In the present invention, the distance adjustment structure and the lens mode replacement structure are combined. The lens mode replacement structure can achieve different imaging modes by replacing optical lenses with different properties. And when the distance adjustment structure meets the different wavelengths of light adopted by the optical lens under different imaging modes, it can also provide sufficient space for the operation of the lens mode replacement structure by reducing the distance between each optical lens, enabling the mode adjustment of this optical lens without significantly increasing the space. Description of the Drawings

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, other implementation drawings can be obtained by extending according to the provided drawings without creative efforts.

[0025] The structures, ratios, sizes, etc. illustrated in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the ratio relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention.

[0026] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of the structure of the distance adjustment structure in an embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of the structure of the lens mode replacement structure in an embodiment of the present invention;

[0029] Figure 4 is a schematic diagram of the upward view structure of the inner cavity of the tailstock in an embodiment of the present invention;

[0030] Figure 5 is a schematic diagram of the structure of the fixed frame in an embodiment of the present invention;

[0031] Figure 6 is a schematic diagram of the structure of the fixed ring in an embodiment of the present invention.

[0032] In the figure:

[0033] 1. Lens support cylinder; 2. Optical lens group; 3. Distance adjustment structure; 4. Ordinary filter lens; 5. First accommodation cavity; 6. Infrared filter lens; 7. Second accommodation cavity; 8. Lens mode replacement structure;

[0034] 101. Lens barrel; 102. Tailstock; 103. Bracket;

[0035] 301. Lens frame; 302. Distance adjustment screw;

[0036] 801. Circumferential sliding groove; 802. Radial sliding groove; 803. Sliding seat; 804. Steering motor; 805. Fixed frame; 806. Limit seat; 807. Pressing cylinder; 808. Fixed ring; 809. Pressing rod; 810. Pressing slot hole; 811. Magnetic attraction; 812. Sliding fixed strip; 813. Sliding card slot. Specific embodiments

[0037] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0038] As Figures 1 to 6 shown, an embodiment of the present invention provides an optical lens, including a lens support barrel 1. An optical lens group 2, a distance adjustment structure 3, a common filter lens 4, a first accommodation cavity 5, an infrared filter lens 6, a second accommodation cavity 7, and a lens mode switching structure 8 are arranged in the lens support barrel 1. The distance adjustment structure 3 can adjust the positions of the optical lenses in the optical lens group 2 and the distance between adjacent optical lenses. The common filter lens 4 can filter light with wavelengths outside the visible light range. It is combined with the optical lens group 2 in the daytime and high-brightness environments. The first accommodation cavity 5 is used to accommodate the common filter lens 4. The infrared filter lens 6 can filter light with wavelengths outside the infrared range. It is combined with the optical lens group 2 in the night and low-brightness environments. The second accommodation cavity 7 is used to accommodate the infrared filter lens 6.

[0039] As for the lens mode switching structure 8, it can select and control the composition structure of the optical lens. It can extract the common filter lens 4 into the first accommodation cavity 5, and at the same time extract the infrared filter lens 6 from the second accommodation cavity 7 to be combined with the optical lens group 2; it can also extract the infrared filter lens 6 into the second accommodation cavity 7, and at the same time extract the common filter lens 4 from the first accommodation cavity 5 to be combined with the optical lens group 2, that is, change the optical lens group 2 + common filter lens 4 into the optical lens group 2 + infrared filter lens 6 or change the optical lens group 2 + infrared filter lens 6 into the optical lens group 2 + common filter lens 4. In the composition structure of the optical lens group 2 + common filter lens 4, the optical lens can filter out the interference of invisible light such as infrared rays and ultraviolet rays, making the imaging clearer. This mode can be used in the daytime. In the composition structure of the optical lens group 2 + infrared filter lens 6, the optical lens can filter out light with wavelengths outside the infrared range, so that the optical lens only receives infrared light, and the image formed is an infrared image, which can be used in the night and low-brightness environments. In this state, the surrounding environment of the lens can be clearly viewed using the infrared image.

[0040] Through the above settings, in this embodiment, with a small improvement on the existing optical lens group 2, ordinary optical imaging and infrared imaging are realized. Ordinary optical imaging can be used in the daytime and high-brightness environments, and infrared imaging can be used in the night and low-brightness environments. Each has its own target, so as to achieve high-quality imaging all day long.

[0041] Since the wavelengths of the light adopted by the optical lens are different in the above two modes, when switching modes, the distances between the optical lenses in the optical lens group 2 need to be adjusted, and the distances between the optical lenses in the optical lens group 2 can be adjusted through the distance adjustment structure 3. The distance adjustment structure 3 is arranged in the lens support cylinder 1. The lens support cylinder 1 includes a lens barrel 101, a tailstock 102 connected to the rear end of the lens barrel 101, and a support 103 connected to the lower end of the lens barrel 101. The lens barrel 101 and the tailstock 102 are hollow inside and communicate with each other. The optical lens group 2 is arranged in the lens barrel 101. The first accommodation cavity 5 and the second accommodation cavity 7 are symmetrically arranged on the left and right side walls of the inner cavity of the tailstock 102.

[0042] The distance adjustment structure 3 is specifically arranged in the lens barrel 101 and includes a plurality of lens frames 301 for fixing the optical lenses. The lens frames 301 are circular rings, and the outer walls of the lens frames 301 are in contact with the inner wall of the lens barrel 101. A plurality of distance adjustment screws 302 are axially penetrated through the lens frames 301. The plurality of distance adjustment screws 302 are evenly spaced on the lens frames 301. The lens frames 301 and the distance adjustment screws 302 are in one-to-one correspondence, and the corresponding lens frames 301 and distance adjustment screws 302 are threadedly connected. The two ends of the distance adjustment screw 302 are respectively fixed at the two ends of the lens barrel 101, and one end of the distance adjustment screw 302 is connected with a fine adjustment motor.

[0043] In the distance adjustment structure 3, the number of the distance adjustment screws 302 and the lens frames 301 is equal and in one-to-one correspondence. Among them, the corresponding lens frames 301 and distance adjustment screws 302 are threadedly connected. The relationship between the distance adjustment screw 302 and the non-corresponding lens frames 301 is only passing through. That is, there are a plurality of through holes provided on the lens frames 301, and only one through hole is a threaded hole, and this threaded hole is the hole corresponding to the threaded connection of the distance adjustment screw 302. Among them, the thread on the surface of the distance adjustment screw 302 is an external thread, and the diameter of the part without thread on the surface of the distance adjustment screw 302 is equal to the outer diameter of the external thread and also equal to the inner diameter of the through hole.

[0044] Actually, the distance adjustment structure 3 adjusts the distances between the optical lenses by an indirect method. The distance adjustment structure 3 can only adjust the positions of the optical lenses. After adjusting the positions of the optical lenses, the distances between adjacent optical lenses are naturally adjusted. When adjusting the position of the optical lens, find the distance adjustment screw 302 corresponding to the optical lens, and then start the fine adjustment motor connected to the distance adjustment screw 302, and drive the distance adjustment screw 302 to rotate by using the fine adjustment motor. The relationship between the distance adjustment screw 302 and the lens frame 301 is equivalent to a lead screw-nut pair. The distance adjustment screw 302 is the lead screw, and the lens frame 301 is the nut seat. The rotation of the distance adjustment screw 302 can make the lens frame 301 translate along the axial direction of the distance adjustment screw 302, change the position of the optical lens, and adjust the distances between the optical lenses.

[0045] It should be noted that in the above-mentioned distance adjustment structure 3, since a plurality of distance adjustment screws 302 are provided, the distance adjustment screws 302 can provide a guiding function for the movement of the lens frame 301, and can also provide a supporting and restricting function for the lens frame 301, so that the lens frame 301 always maintains a state perpendicular to the axis of the lens barrel 101. The more the number of distance adjustment screws 302, the more stable the state of the lens frame 301, thereby preventing the problem of defective imaging quality caused by the shaking of the lens frame 301.

[0046] In this embodiment, the lens mode changing structure 8 is arranged in the tailstock 102. The lens mode changing structure 8 includes a circumferential chute 801 and a radial chute 802 arranged at the top of the inner cavity of the tailstock 102. The circumferential chute 801 is perpendicular to the axial direction of the lens barrel 101. The radial chute 802 is located between the lens barrel 101 and the circumferential chute 801, and the radial chute 802 is vertically connected to the circumferential chute 801. Both ends of the circumferential chute 801 extend into the first accommodating cavity 5 and the second accommodating cavity 7 respectively. Two sliding seats 803 are arranged in the circumferential chute 801. A steering motor 804 is arranged on the sliding seat 803. The output shaft of the steering motor 804 is vertically downward and connected with a rectangular fixed frame 805. The ordinary filter lens 4 and the infrared filter lens 6 are respectively installed in the two fixed frames 805. A limiting seat 806 is arranged at the midpoint of the circumferential chute 801. The left sliding seat 803 is in an "L" shape. When the sliding seat 803 contacts the limiting seat 806, the left fixed frame 805 is exactly located at the vertical center of the tailstock 102. The right sliding seat 803 is in a shape. When the sliding seat 803 contacts the limiting seat 806, the right fixed frame 805 is exactly located at the vertical center of the tailstock 102.

[0047] A pressing cylinder 807 is arranged at the end of the tailstock 102. The output end of the pressing cylinder 807 is connected with a fixing ring 808. A plurality of pressing rods 809 are arranged on the surface of the fixing ring 808 facing the lens barrel 101. Pressing slot holes 810 corresponding to the ends of the pressing rods 809 are arranged on the fixed frame 805. The pressing slot holes 810 are non-through holes and a magnetic attraction 811 for attracting the pressing rods 809 is arranged therein. After the output end of the pressing cylinder 807 extends out, it can be inserted into the pressing slot holes 810 on the fixed frame 805. As the pressing cylinder 807 continues to extend, it can push the fixed frame 805 forward, so that the sliding seat 803 enters the radial chute 802 and slides along the radial chute 802 until the pressing rods 809 press the fixed frame 805 against the front end of the tailstock 102. At this time, the fixed frame 805 cannot move and has good stability.

[0048] A roller drive assembly for driving the sliding seat 803 to slide within the radial chute 802 is provided within the radial chute 802. The roller drive assembly includes rollers and a motor. When replacing the lens, taking the replacement of the ordinary filter lens 4 with the infrared filter lens 6 as an example; initially, the ordinary filter lens 4 is combined with the optical lens group 2, and the infrared filter lens 6 is located in the second receiving cavity 7. The ordinary filter lens 4 is perpendicular to the axis of the lens barrel 101, and the infrared filter lens 6 is perpendicular to the axis of the ordinary filter lens 4. The output end of the pressing cylinder 807 is in the extended state, and the pressing rod 809 is inserted into the pressing slot hole 810 on the fixed frame 805 of the ordinary filter lens 4, pressing the fixed frame 805 against the foremost end of the tailstock 102. After the lens mode replacement structure 8 is activated, the output end of the pressing cylinder 807 retracts, using the magnetic attraction 811 to adsorb the pressing slot hole 810, causing the fixed frame 805 and the pressing rod 809 to withdraw together with the output end of the pressing cylinder 807. After the sliding seat 803 withdraws into the circumferential chute 801, the fixed frame 805 cannot move backward and stays within the circumferential chute 801, and the pressing cylinder 807 retracts with the pressing rod 809. Thereafter, the steering motor 804 drives the left fixed frame 805 to rotate 90°, and then the roller drive assembly drives the sliding seat 803 to move towards the first receiving cavity 5 until the fixed frame 805 is received within the first receiving cavity 5. Then the roller drive assembly drives the right sliding seat 803 to move out of the second receiving cavity 7 until it contacts the limit seat 806, and then the steering motor 804 on the sliding seat 803 rotates the fixed frame 805 by 90° so that the axis of the infrared filter lens 6 coincides with the axis of the lens barrel 101. Finally, after the output end of the pressing cylinder 807 extends, it can be inserted into the pressing slot hole 810 on the fixed frame 805. As the pressing cylinder 807 continues to extend, it can push the fixed frame 805 forward, causing the sliding seat 803 to enter the radial chute 802 and slide along the radial chute 802 until the pressing rod 809 presses the fixed frame 805 against the foremost end of the tailstock 102. At this time, the fixed frame 805 cannot move, having good stability.

[0049] In this embodiment, the setting of the pressing cylinder 807 can keep the fixed frame 805 of the lens combined with the optical lens group 2 stable, so that the entire optical lens combination is in a stable state and will not shake, in order to ensure the imaging quality of the lens. Further, in order to keep the other idle lens stable and prevent it from shaking within the tailstock 102, a sliding fixed strip 812 is provided on the pressing rod 809. The edge of the sliding fixed strip 812 is wavy, and sliding card slots 813 corresponding to the sliding fixed strip 812 are provided on the front surfaces of the two cross bars of the fixed frame 805. During the process of the output end of the pressing cylinder 807 extending, the sliding fixed strip 812 is inserted into the sliding card slots 813 of the side fixed frame 805, thereby fixing the fixed frame 805.

[0050] Moreover, in the present invention, the focus adjustment structure 3 and the lens mode replacement structure 8 are combined. The lens mode replacement structure 8 can achieve different imaging modes by replacing optical lenses with different properties. When the focus adjustment structure 3 meets the condition that the wavelengths of the light adopted by the optical lens under different imaging modes are different, it can also provide sufficient space for the operation of the lens mode replacement structure 8 by reducing the distance between each optical lens, so that the optical lens can also achieve mode adjustment without significantly increasing the space.

[0051] Based on the same inventive concept, an embodiment of the present invention further provides an imaging device, including the optical lens provided in any one of the above embodiments, and an imaging element for converting the optical image formed by the optical lens into an electrical signal. The imaging element may be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor element (CMOS). The imaging device may be an independent imaging device such as a camera, a monitor, or a detection distance camera, or may be an imaging module integrated in an imaging or monitoring device such as a camera or a monitor.

[0052] Although the present invention has been described in detail with general descriptions and specific embodiments above, on the basis of the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of the present invention claimed.

Claims

1. An optical lens, comprising a lens support cylinder (1), wherein an optical lens group (2) is disposed within the lens support cylinder (1), characterized in that, Inside the lens support cylinder (1), there is also provided a distance adjustment structure (3) for adjusting the positions of the optical lenses in the optical lens group (2) and the distances between adjacent optical lenses; a common filter lens (4) for filtering light with wavelengths outside the visible light range during the day and in high-brightness environments; a first accommodation cavity (5) for accommodating the common filter lens (4); an infrared filter lens (6) for filtering light with wavelengths outside the infrared range at night and in low-brightness environments; a second accommodation cavity (7) for accommodating the infrared filter lens (6); a lens mode replacement structure (8) for extracting the common filter lens (4) into the first accommodation cavity (5), and at the same time, taking out the infrared filter lens (6) from the second accommodation cavity (7) and combining it with the optical lens group (2); and for extracting the infrared filter lens (6) into the second accommodation cavity (7), and at the same time, taking out the common filter lens (4) from the first accommodation cavity (5) and combining it with the optical lens group (2); The distance adjustment structure (3) is arranged inside the lens barrel (101). The distance adjustment structure (3) includes a plurality of lens frames (301) for fixing optical lenses. The lens frames (301) are circular rings, and the outer walls of the lens frames (301) are in contact with the inner wall of the lens barrel (101). A plurality of distance adjustment screws (302) are axially penetrated through the lens frames (301). The plurality of distance adjustment screws (302) are evenly spaced on the lens frames (301). The lens frames (301) correspond to the distance adjustment screws (302) one by one, and the corresponding lens frames (301) and the distance adjustment screws (302) are threadedly connected. Both ends of the distance adjustment screw (302) are fixed at both ends of the lens barrel (101), and one end of the distance adjustment screw (302) is connected with a fine-tuning motor; The lens mode replacement structure (8) is arranged inside the tailstock (102). The lens mode replacement structure (8) includes a circumferential chute (801) and a radial chute (802) arranged at the top of the inner cavity of the tailstock (102). The circumferential chute (801) is perpendicular to the axis of the lens barrel (101). The radial chute (802) is located between the lens barrel (101) and the circumferential chute (801), and the radial chute (802) is perpendicularly connected to the circumferential chute (801). Both ends of the circumferential chute (801) extend into the first accommodation cavity (5) and the second accommodation cavity (7) respectively. Two sliding seats (803) are arranged in the circumferential chute (801). A steering motor (804) is arranged on the sliding seat (803). The output shaft of the steering motor (804) is vertically downward connected with a rectangular fixed frame (805). The common filter lens (4) and the infrared filter lens (6) are respectively installed in the two fixed frames (805).

2. The optical lens according to claim 1, characterized in that, The lens support cylinder (1) includes a lens barrel (101), a tailstock (102) connected to the rear end of the lens barrel (101), and a bracket (103) connected to the lower end of the lens barrel (101). The lens barrel (101) and the tailstock (102) are hollow inside and communicate with each other. The optical lens group (2) is arranged inside the lens barrel (101). The first accommodation cavity (5) and the second accommodation cavity (7) are symmetrically arranged on the left and right side walls of the inner cavity of the tailstock (102).

3. The optical lens according to claim 1, characterized in that, A limit seat (806) is arranged at the midpoint of the circumferential chute (801). The left sliding seat (803) is in an "L" shape. When the sliding seat (803) contacts the limit seat (806), the left fixed frame (805) is exactly located at the vertical center of the tailstock (102). The right sliding seat (803) is in a "ㄣ" shape. When the sliding seat (803) contacts the limit seat (806), the right fixed frame (805) is exactly located at the vertical center of the tailstock (102).

4. The optical lens according to claim 3, characterized in that, A pressing cylinder (807) is arranged at the end of the tailstock (102). The output end of the pressing cylinder (807) is connected with a fixing ring (808). A plurality of pressing rods (809) are arranged on the surface of the fixing ring (808) facing the lens barrel (101). Pressing groove holes (810) corresponding to the ends of the pressing rods (809) are arranged on the fixed frame (805). The pressing groove holes (810) are non-through holes and a magnetic attraction (811) for attracting the pressing rods (809) is arranged inside them.

5. The optical lens according to claim 4, characterized in that, A sliding fixing strip (812) is arranged on the pressing rod (809). The edge of the sliding fixing strip (812) is wavy. Sliding card slots (813) corresponding to the sliding fixing strip (812) are arranged on the front surfaces of the two cross bars of the fixed frame (805).

6. An imaging device, characterized in that, An optical lens according to any one of claims 1-5 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images