Core-adjustable lens structure

Abstract

The invention provides a lens structure with an adjustable core, and belongs to the technical field of optical equipment, the lens structure comprises a first lens group, a second lens group, a main cylinder and an adjusting cylinder, the first lens group and the second lens group are slidably mounted in the main cylinder, a plurality of transmission PINs are mounted on the surfaces of the first lens group and the second lens group, and the adjusting cylinder is mounted in the main cylinder. The main cylinder is sleeved with the adjusting cylinder, the adjusting cylinder is rotationally connected with the main cylinder, a first group curve groove and a second group curve groove which correspond to a plurality of transmission PINs on the first lens group and the second lens group respectively are formed in the surface of the adjusting cylinder, a first connector is detachably connected to one end, close to the second lens group, of the main cylinder, and a second connector is detachably connected to the other end, close to the second lens group, of the main cylinder. The other end of the first connector is detachably connected with a second connector, so that the limitation that a conventional zoom lens can only perform lens core adjustment under a fixed magnification is made up, the lens can perform core adjustment in the whole magnification range, the imaging quality of the lens is improved, and the zoom action can be always kept smooth.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical devices, and specifically relates to a lens structure with an adjustable core. Background Art

[0002] The lens centering technology of lenses is often used in the assembly and adjustment process of high-precision optical lenses. The imaging parameters of the lens are obtained through image processing technology, and the positions of sensitive lenses are adjusted to optimize the imaging quality and make the imaging quality of the lens reach the best state.

[0003] Existing zoom lenses can only perform lens centering at several fixed magnification values, and there are significant limitations in the selection of magnification. Summary of the Invention

[0004] Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the embodiments of the present invention is to provide a lens structure with an adjustable core.

[0005] To solve the above technical problems, the present invention provides the following technical solution: A lens structure with an adjustable core, including a first lens group, a second lens group, a main barrel, and an adjustment barrel. The first lens group and the second lens group are slidably installed inside the main barrel. A number of driving PIN feet are installed on the surfaces of the first lens group and the second lens group. Linear grooves corresponding to the number of driving PIN feet on the first lens group and the second lens group are provided on the surface of the main barrel. The adjustment barrel is sleeved outside the main barrel, and the adjustment barrel is rotatably connected to the main barrel. A group of curve grooves and a second group of curve grooves corresponding to the number of driving PIN feet on the first lens group and the second lens group are provided on the surface of the adjustment barrel. One end of the main barrel close to the second lens group is detachably connected to a first joint. One end of the first joint close to the second lens group is in contact connection with one end of the adjustment barrel. The other end of the first joint is detachably connected to a second joint, and the second joint is used to connect to a camera.

[0006] As a further improvement: Threads are provided at both ends of the main barrel, and one end of the main barrel close to the second lens group is threadedly connected to the first joint.

[0007] As a further improvement: A V-shaped bayonet is provided at one end of the first joint close to the second joint. The first joint and the second joint are snap-connected through the V-shaped bayonet, and a number of screws are provided at the position of the V-shaped bayonet on the second joint.

[0008] As a further improvement: a variable magnification barrel is sleeved on the outer surface of the adjusting barrel. One end of the main barrel close to the first lens group is threadedly connected with a fixing barrel. The variable magnification barrel is located between the fixing barrel and the first joint. A first locking member is installed between the variable magnification barrel and the main barrel. The first locking member penetrates through the adjusting barrel. The first locking member is used to connect and fix the main barrel, the variable magnification barrel and the adjusting barrel.

[0009] As a further improvement: the first lens group includes a first lens barrel and a sensitive lens group. The sensitive lens group is installed in the first lens barrel. A plurality of second locking members are arranged on the first lens barrel. The second locking members are used to align and fix the sensitive lens group. A core alignment clearance straight groove corresponding to the second locking members is formed on the surface of the main barrel. A core alignment clearance curved groove corresponding to the second locking members is formed on the surface of the adjusting barrel. The second locking members and the transmission PIN pins are arranged staggeredly.

[0010] As a further improvement: a dispensing hole penetrating through the first lens barrel is arranged on one side of the second locking member.

[0011] As a further improvement: gaskets are arranged on both sides of the sensitive lens group.

[0012] As a further improvement: the gasket is made of stainless steel.

[0013] As a further improvement: a thread is arranged at one end of the second joint away from the first joint.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: it makes up for the limitation that the variable magnification lens in the past could only perform lens core alignment at a fixed magnification, enables the lens to perform core alignment in the entire magnification range, improves the imaging quality of the lens, and always keeps the variable magnification operation smooth. Description of the Drawings

[0015] Figure 1 is an exploded view of the lens components of an adjustable core lens structure;

[0016] Figure 2 is an assembled view of the lens variable magnification structure of an adjustable core lens structure;

[0017] Figure 3 is a sectional view of a group of an adjustable core lens structure;

[0018] Figure 4 is an assembled view of the group and the main barrel of an adjustable core lens structure;

[0019] Figure 5 is a lens variable magnification process diagram of an adjustable core lens structure;

[0020] Figure 6 Assembly diagram of the first joint and the second joint of a lens structure with an adjustable core

[0021] Figure 7 Overall assembly diagram of a lens structure with an adjustable core

[0022] In the figure: 1. Fixed cylinder; 2. Zoom cylinder; 3. First locking member; 4. First lens group; 41. First lens barrel; 42. Sensitive lens group; 43. Core adjustment gap; 44. Spacer; 45. Second locking member; 46. Glue dispensing hole; 5. Driving PIN foot; 6. Main cylinder; 61. Core adjustment clearance straight groove; 62. Straight groove; 7. Second lens group; 8. Adjusting cylinder; 81. Core adjustment clearance curve groove; 82. First group curve groove; 83. Second group curve groove; 9. First joint; 90. V-shaped bayonet; 10. Second joint; 11. Screw; 100. Lens assembly Specific embodiments

[0023] The technical solutions of the present application will be further described in detail below in conjunction with specific embodiments

[0024] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application

[0025] Please refer to Figures 1 to 7 , in one embodiment, a lens structure with an adjustable core includes a first lens group 4, a second lens group 7, a main cylinder 6 and an adjusting cylinder 8. The first lens group 4 and the second lens group 7 are slidably installed inside the main cylinder 6. A plurality of driving PIN feet 5 are installed on the surfaces of the first lens group 4 and the second lens group 7. Straight grooves 62 corresponding to the plurality of driving PIN feet 5 on the first lens group 4 and the second lens group 7 are formed on the surface of the main cylinder 6. The adjusting cylinder 8 is sleeved outside the main cylinder 6, and the adjusting cylinder 8 is rotatably connected to the main cylinder 6. A first group curve groove 82 and a second group curve groove 83 corresponding to the plurality of driving PIN feet 5 on the first lens group 4 and the second lens group 7 are formed on the surface of the adjusting cylinder 8. One end of the main cylinder 6 close to the second lens group 7 is detachably connected to a first joint 9. One end of the first joint 9 close to the second lens group 7 is in contact connection with one end of the adjusting cylinder 8. The other end of the first joint 9 is detachably connected to a second joint 10, and the second joint 10 is used for connecting to a camera

[0026] In this embodiment, there are 4 straight slots 62, a group of curved slots 82 and a second group of curved slots 83, which are evenly distributed at 90°. The driving PIN foot 5 is located in the straight slot 62, the first group of curved slots 82 and the second group of curved slots 83. The driving PIN foot 5 can drive the first lens group 4 and the second lens group 7 to move along their respective curved slots, so that the lens accurately changes the magnification. The straight slot 62 is used for guiding and limiting the driving PIN foot 5 during movement.

[0027] In this embodiment, it makes up for the limitation that the conventional zoom lens can only adjust the lens centering at a fixed magnification, so that the lens can perform centering adjustment within the entire magnification range.

[0028] Please refer to Figure 6 , in one embodiment, both ends of the main cylinder 6 are provided with threads, and one end of the main cylinder 6 close to the second lens group 7 is threadedly connected to the first joint 9.

[0029] In this embodiment, the connection and fixation between the second lens group 7 and the first joint 9 can be realized by providing threads.

[0030] Please refer to Figure 6 , in one embodiment, one end of the first joint 9 close to the second joint 10 is provided with a V-shaped bayonet 90. The first joint 9 and the second joint 10 are snap-connected through the V-shaped bayonet 90, and a plurality of screws 11 are provided at the position of the V-shaped bayonet 90 on the second joint 10.

[0031] In this embodiment, the lens assembly 100 includes a fixed cylinder 1, a zoom cylinder 2, a first lens group 4, a group of lens barrels, a main cylinder 6, a second lens group 7, an adjustment cylinder 8 and a first joint 9. The V-shaped bayonet 90 can connect the entire lens assembly 100 to the camera to achieve 360° angle adjustment. Before centering adjustment, the appropriate working angle between the camera and the lens can be found first, fixed with the set screws 11, and then the centering adjustment operation can be carried out.

[0032] Please refer to Figure 1 , Figure 2 , in one embodiment, the outer surface of the adjustment cylinder 8 is sleeved with a zoom cylinder 2. One end of the main cylinder 6 close to the first lens group 4 is threadedly connected to the fixed cylinder 1. The zoom cylinder 2 is located between the fixed cylinder 1 and the first joint 9. A first locking member 3 is installed between the zoom cylinder 2 and the adjustment cylinder 8. The first locking member 3 penetrates the adjustment cylinder 8, and the first locking member 3 is used to connect and fix the main cylinder 6, the zoom cylinder 2 and the adjustment cylinder 8.

[0033] In this embodiment, by providing a zoom barrel 2, the appearance can be kept beautiful after assembly. When adjusting the magnification, due to the locking effect of the first locking member 3, only by rotating the zoom barrel 2 can the adjustment barrel 8 be directly driven to rotate, thereby changing the lens magnification. The first locking member 3 can be a knurled locking screw. By loosening the knurled locking screw, rotating the zoom barrel 2 will drive the adjustment barrel 8 to rotate, so that the magnification can be adjusted. After the magnification adjustment is completed, tightening the knurled locking screw can fix the magnification. Through the first locking member 3, the force acting on the zoom barrel 2 can be transmitted to the adjustment barrel 8, and at the same time, the zoom barrel 2 and the adjustment barrel 8 can be locked and fixed.

[0034] Please refer to Figure 1 、 Figure 2 and Figure 3 , in one embodiment, the first lens group 4 includes a first lens barrel 41 and a sensitive lens group 42. The sensitive lens group 42 is installed in the first lens barrel 41. A plurality of second locking members 45 are provided on the first lens barrel 41. The second locking members 45 are used to align and fix the sensitive lens group 42. A core alignment clearance straight groove 61 corresponding to the second locking member 45 is formed on the surface of the main barrel 6, and a core alignment clearance curved groove 81 corresponding to the second locking member 45 is formed on the surface of the adjustment barrel 8. The second locking members 45 and the transmission PIN feet 5 are arranged alternately. A dispensing hole 46 penetrating the first lens barrel 41 is provided on one side of the second locking member 45.

[0035] In this embodiment, core alignment gaps 43 are provided at both ends of the sensitive lens group 42. There are 4 core alignment clearance straight grooves 61 and 4 core alignment clearance curved grooves 81, and they are evenly distributed at 90°. The second locking members 45 and the dispensing holes 46 are located in the core alignment clearance straight grooves 61 and the core alignment clearance curved grooves 81. During the zooming process, the relative positions of the core alignment clearance curved groove 81 and a group of curved grooves 82 remain unchanged, ensuring that the core alignment operation can always be performed during the zooming process and avoiding interference.

[0036] The second locking member 45 can be a set screw 11. There are 4 second locking members 45, and they are evenly distributed at 90°. The sensitive lens group 42 is aligned by 4 set screws 11 on the side of the first lens barrel 41. When adjusted to the best position, tighten the set screws 11, and inject glue through the dispensing holes 46 to fix the sensitive lens group 42.

[0037] Please refer to Figure 3 , in one embodiment, gaskets 44 are provided on both sides of the sensitive lens group 42. The material of the gaskets 44 is stainless steel.

[0038] In this embodiment, when the sensitive lens group 42 is assembled, gaskets 44 made of stainless steel are respectively placed on the left and right sides. The gaskets 44 are available in various thickness specifications and are used to adjust the air gap between the sensitive lens group 42 and the left and right lenses. The gaskets 44 have low roughness, which can reduce the resistance during the core adjustment operation and facilitate the core adjustment.

[0039] Please refer to Figure 1 , Figure 6 , in one embodiment, the end of the second joint 10 away from the first joint 9 is provided with a thread.

[0040] In this embodiment, the provision of the thread facilitates the connection of the second joint 10 to the camera.

[0041] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0042] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A lens structure with an adjustable core, characterized in that: The invention comprises a first lens group, a second lens group, a main barrel and an adjustment barrel, wherein the first lens group and the second lens group are slidably mounted inside the main barrel, a plurality of transmission PIN pins are mounted on the surfaces of the first lens group and the second lens group, a linear groove corresponding to the plurality of transmission PIN pins on the first lens group and the second lens group is provided on the surface of the main barrel, the adjustment barrel is sleeved outside the main barrel, the adjustment barrel is rotatably connected to the main barrel, a first group of curved grooves and a second group of curved grooves corresponding to the plurality of transmission PIN pins on the first lens group and the second lens group are provided on the surface of the adjustment barrel, an end of the main barrel close to the second lens group is detachably connected to a first joint, an end of the first joint close to the second lens group is in contact with and connected to one end of the adjustment barrel, the other end of the first joint is detachably connected to a second joint, and the second joint is used to connect to a camera.

2. The lens structure with an adjustable core according to claim 1, characterized in that: Both ends of the main tube are provided with threads, and one end of the main tube close to the second lens group is threadedly connected to the first joint.

3. The lens structure with an adjustable core according to claim 1, characterized in that: A V-shaped bayonet is provided at one end of the first joint close to the second joint, the first joint and the second joint are connected by the V-shaped bayonet, and a plurality of screws are provided on the second joint at the position of the V-shaped bayonet.

4. The lens structure with an adjustable core according to claim 2, characterized in that: A zoom barrel is sleeved on the outer surface of the adjusting barrel, and one end of the main barrel close to the first lens group is connected to a fixed barrel by a thread. The zoom barrel is located between the fixed barrel and the first joint. A first locking piece is installed between the zoom barrel and the main barrel, and the first locking piece passes through the adjusting barrel. The first locking piece is used to connect and fix the main barrel, the zoom barrel and the adjusting barrel.

5. The lens structure with an adjustable core according to claim 1, characterized in that: The first lens group includes a first lens barrel and a sensitive lens group. The sensitive lens group is installed in the first lens barrel. The first lens barrel is provided with a plurality of second locking members. The second locking members are used to adjust and fix the sensitive lens group. The surface of the main barrel is provided with a center-adjusting air-avoiding straight groove corresponding to the second locking members. The surface of the adjustment barrel is provided with a center-adjusting air-avoiding curved groove corresponding to the second locking members. The second locking members are staggered with the transmission PIN feet.

6. The lens structure with an adjustable core according to claim 5, characterized in that: A glue dispensing hole penetrating through the first lens barrel is arranged on one side of the second locking member.

7. The lens structure with an adjustable core according to claim 5, characterized in that: Gaskets are arranged on both sides of the sensitive lens group.

8. The lens structure with an adjustable core according to claim 7, characterized in that: The gasket is made of stainless steel.

9. The lens structure with an adjustable core according to claim 1, characterized in that: One end of the second joint away from the first joint is provided with a thread.

Images