Optical lens and adjusting method thereof
By introducing telescopic components and lens sets into optical lenses, adjusting the distance between the lens set and the imaging surface, the problem of difficulty in imaging in traditional lenses at different object positions is solved, and a wider range of application scenarios and efficient imaging is achieved.
Patent Information
- Application Number
- CN202411883262.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-02-28
AI Technical Summary
When the object position deviates from the design point, it is difficult for traditional optical lenses to meet the object imaging detection needs at different positions, resulting in the impact of focusing ability, aberration correction and light collection efficiency.
An optical lens is designed, including a telescopic assembly and a lens set, through which the distance between the lens set and the imaging surface is adjusted, thereby realizing object imaging detection at different positions.
This design improves the application scenarios of optical lenses and can achieve clear imaging at different objects positions, with simple structure and low cost.
Smart Images
Figure CN119535709A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of optics and imaging technology, and in particular, to an optical lens and an adjustment method thereof. Background Art
[0002] In the current field of optics and imaging technology, the performance of the lens, as a key component for capturing and recording images, is directly related to the image quality and accuracy of information acquisition. However, the optical design of traditional lenses is often optimized based on a specific object distance and viewing angle. When the object position deviates from this design point, such as at close or long distances, the lens's focusing ability, aberration correction, and light collection efficiency may all be affected, making it difficult to meet the imaging detection needs of objects at different positions. Summary of the invention
[0003] In view of this, an object of an embodiment of the present application is to provide an optical lens and an adjustment method thereof, which can enable the optical lens to meet the imaging detection of objects in different positions and increase the application scenarios of the optical lens.
[0004] In a first aspect, an embodiment of the present application provides an optical lens, comprising: a telescopic component and a lens group; the telescopic component comprises: a fixed part and a telescopic part; the fixed part is connected to the telescopic part; the lens group is arranged inside the fixed part; wherein the telescopic component is configured to telescope along the direction of light beam transmission; the telescopic component is also configured to adjust the distance between the lens group and the imaging surface by telescoping.
[0005] In the above implementation process, by setting a telescopic part in the optical lens, the telescopic part can be used to adjust the distance between the lens group and the imaging surface, so that the optical lens can meet the imaging detection of objects in different positions, and increase the application scenarios of the optical lens. In addition, by setting the lens group inside the fixed part, during the adjustment process of the optical lens, the lens group can always remain fixed inside the fixed part, and the imaging detection of objects in different positions can be achieved by only adjusting the telescopic component, which has a simple structure and low cost.
[0006] In one embodiment, the telescopic part includes: a first moving part, a second moving part and an elastic part; the first moving part includes a first inclined plane, and the second moving part includes a second inclined plane; the first moving part and the second moving part are in contact through the first inclined plane and the second inclined plane, and the first inclined plane and the second inclined plane are arranged in parallel; one end of the elastic part is connected to the second moving part, and the other end of the elastic part is connected to the fixed part; the side of the first moving part away from the second moving part is in contact with the fixed part; the first moving part is configured to move on a plane of the fixed part perpendicular to the direction of light beam transmission; wherein, the second moving part is configured to move along the direction of light beam transmission during the movement of the first moving part.
[0007] In the above implementation process, by arranging the first moving part, the second moving part and the elastic part to cooperate, the first moving part and the second moving part are moved, thereby adjusting the light beam transmission path, and increasing the application scenarios of the optical lens. In addition, the entire telescopic part only includes the first moving part, the second moving part and the elastic part, which can simplify the structure of the optical lens and reduce the cost of the optical lens.
[0008] In one embodiment, the telescopic assembly further includes: an adjusting member; one end of the adjusting member contacts one side of the first movable member along the moving direction of the first movable member; the other end of the adjusting member extends through the fixed part to the outside of the fixed part; wherein the adjusting member is configured to move in a direction perpendicular to the light beam transmission, and the first movable member is configured to move along with the adjusting member during contact with the adjusting member.
[0009] In the above implementation process, by setting an adjustment member, and one end of the adjustment member is set outside the fixed part, the adjustment member can be directly controlled outside the optical lens, thereby realizing the control of the first moving member and the second moving member, which can improve the control flexibility of the first moving member and the second moving member.
[0010] In one embodiment, a buffer member is provided at one end of the adjusting member facing the first moving member.
[0011] In the above implementation process, a buffer member is arranged at one end of the adjusting member facing the first moving member. During the process of the adjusting member adjusting the first moving member, the buffer member can alleviate the vibration and impact between the first moving member and the adjusting member, thereby reducing the impact of the adjusting member on the first moving member and extending the service life of the first moving member.
[0012] In one embodiment, a first thread is provided on the outer surface of the adjusting member contacting the fixed part; a second thread is provided on the inner surface of the fixed part contacting the adjusting member; wherein the first thread is adapted to the second thread, and the adjusting member moves on a plane of the fixed part perpendicular to the light beam transmission direction through the first thread and the second thread.
[0013] In the above implementation process, by providing the first thread and the second thread, the adjusting member can be rotated so that the adjusting member moves on a plane of the fixed part perpendicular to the light beam transmission direction, thereby realizing flexible adjustment of the adjusting member. In addition, the position of the adjusting member can be fixed by the first thread and the second thread, so that after the adjustment of the adjusting member, the position of the adjusting member remains unchanged, thereby improving the adjustment stability.
[0014] In one embodiment, the second moving part includes: an inclined portion and a cavity portion; the inclined portion and the cavity portion are connected; a first light-transmitting element is provided in both the inclined portion and the cavity portion, and the first light-transmitting elements of the inclined portion and the cavity portion are aligned; the first moving part is provided with a second light-transmitting element; wherein the length of the second light-transmitting element in the direction perpendicular to the light beam transmission is greater than that of the first light-transmitting element; when the first moving part and the second moving part are in contact, the first light-transmitting element is always aligned with the second light-transmitting element.
[0015] In the above implementation process, by setting the length of the second light-transmitting element in the direction perpendicular to the light beam transmission to be greater than that of the first light-transmitting element, the first light-transmitting element and the second light-transmitting element can be always aligned during the movement of the first moving part and the second moving part, thereby making the light beam transmission path always remain unchanged along the direction perpendicular to the light beam transmission, thereby reducing the difficulty of adjusting the optical lens.
[0016] In one embodiment, the slope portion and the cavity portion are in contact with the fixed portion; the fixed portion is configured to fix the position of the second moving part along a direction perpendicular to the light beam transmission; wherein the second moving part moves along the direction of the light beam transmission.
[0017] In the above implementation process, by setting the inclined surface and the cavity portion of the second movable part to fit with the fixed part, the position of the second movable part in the direction of vertical light beam transmission can be limited by the fixed part, so that during the adjustment of the optical lens, the first movable part, the second movable part and the lens group are always coaxial, thereby improving the stability of the optical path in the optical lens.
[0018] In one embodiment, the fixed part includes: a fixing seat and a cavity; the fixing seat is fixedly connected to the cavity; the lens group is arranged inside the fixing seat; the first moving part is arranged inside the cavity; the first moving part is in contact with the fixing seat at a side away from the second moving part; the second moving part is arranged inside the cavity at one end close to the first moving part, and the second moving part is arranged outside the cavity at one end away from the first moving part.
[0019] In the above implementation process, by setting the lens group inside the fixed seat, the position of the lens in the lens group remains unchanged during the adjustment of the telescopic component in the cavity, and then the imaging detection of objects in different positions is achieved by adjusting the telescopic component. The whole device has a simple structure and low cost.
[0020] In one embodiment, the lens group includes: a focusing lens and an achromatic module, the focusing lens is made of quartz material; wherein the achromatic module is configured to supplement the achromatic ability of the focusing lens; the achromatic module includes: a first achromatic cemented lens group, a second achromatic cemented lens group and a positive focus lens; the first achromatic cemented lens group, the second achromatic cemented lens group and the positive focus lens are coaxially arranged; the second achromatic cemented lens group is arranged between the first achromatic cemented lens group and the positive focus lens; the first achromatic cemented lens group is arranged on a side close to the focusing lens, and the positive focus lens is arranged on a side away from the focusing lens; wherein the light beam is imaged on the imaging surface through the focusing lens, the first achromatic cemented lens group, the second achromatic cemented lens group and the positive focus lens in sequence.
[0021] In the above implementation process, since the focusing lens is made of quartz material, the quartz material has a weak achromatic ability. By setting a first achromatic cemented lens group, a second achromatic cemented lens group and a positive focus lens to form an achromatic module, the achromatic ability of the focusing lens can be optimized. Compared with an ordinary industrial lens, the clarity of the optical lens can be improved.
[0022] In a second aspect, an embodiment of the present application further provides an optical lens adjustment method, comprising: an optical lens applied to the first aspect, or any one of the first aspects, the method comprising: determining a movement distance of a lens group relative to an imaging surface according to a position change of an object to be detected, a focal length of a focusing lens in the optical lens, and a focal length of an achromatic module in the optical lens; controlling an adjustment member in the optical lens to move along a direction perpendicular to the transmission direction of a light beam according to the movement distance; wherein, during the movement of the adjustment member, the first moving member drives the first moving member to move along a direction perpendicular to the transmission direction of the light beam; during the movement of the first moving member, the second moving member drives the second moving member to move along the light beam transmission direction; the first moving member and the second moving member are configured to extend or shorten the distance between the lens group in the optical lens and the imaging surface by cooperation.
[0023] In the above implementation process, by setting the movement distance of the lens group relative to the imaging plane according to the position change of the object to be detected, the focal length of the focusing lens and the focal length of the achromatic module, a small telescopic amount in the optical lens can be adjusted to meet the imaging detection of a longer distance before and after the focus of the focusing lens, thereby increasing the application scenarios of the optical lens.
[0024] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, embodiments are given below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0026] Figure 1 A cross-sectional view of an optical lens provided in an embodiment of the present application;
[0027] Figure 2 A three-dimensional diagram of a first moving part provided in an embodiment of the present application;
[0028] Figure 3 A front view of a first moving member provided in an embodiment of the present application;
[0029] Figure 4 A three-dimensional diagram of a second moving member provided in an embodiment of the present application;
[0030] Figure 5 A schematic diagram of the relative position relationship between the first moving member and the cavity provided in an embodiment of the present application;
[0031] Figure 6A schematic diagram of the relative position relationship between the second moving member and the cavity provided in an embodiment of the present application;
[0032] Figure 7 A schematic diagram of the arrangement of each lens in the lens set provided in an embodiment of the present application;
[0033] Figure 8 A flowchart of an optical lens adjustment method provided in an embodiment of the present application.
[0034] Description of the drawings: 100-fixed part, 110-fixed seat, 120-cavity, 121-first guide surface, 122-second guide surface, 200-telescopic part, 210-first moving part, 211-first inclined surface, 212-second light-transmitting element, 220-second moving part, 221-second inclined surface, 222-first light-transmitting element, 230-elastic part, 240-adjusting part, 300-lens group, 310-focusing lens, 320-first achromatic cemented lens group, 330-second achromatic cemented lens group, 340-positive focus lens. DETAILED DESCRIPTION
[0035] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings in the embodiments of the present application.
[0036] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0037] At present, the application of fiber-optic output laser processing has become very popular. With the increasing demand of customers for laser processing heads, mechanical vision imaging has become a common feature in applications such as laser welding and cladding.
[0038] At present, the design of typical machine vision lenses (such as industrial fixed-focus lenses) is not specifically targeted at the laser processing industry. In laser processing applications, imaging lenses and focusing lenses in laser processing heads are often required to be used together. However, due to the aberration elimination of the focusing lens itself (especially the weak achromatic performance), conventional industrial lenses on the market usually have insufficient clarity.
[0039] In addition, in the field of optical imaging, clear imaging of objects in different positions has always been a technical challenge. Traditional imaging systems often rely on complex lens combinations and precise mechanical adjustments to achieve focus, which not only increases the complexity and cost of the system, but also limits its flexibility and reliability in certain applications.
[0040] In view of this, the present application proposes an optical lens, which provides a telescopic part in the optical lens, and the telescopic part can be used to adjust the distance between the lens group and the imaging surface, so that the optical lens can meet the imaging detection of objects in different positions, and increase the application scenarios of the optical lens. In addition, by providing the lens group inside the fixed part, during the adjustment process of the optical lens, the lens group can always remain fixed inside the fixed part, and the imaging detection of objects in different positions can be achieved by only adjusting the telescopic component, which has a simple structure and low cost.
[0041] To facilitate understanding of this embodiment, an optical lens disclosed in an embodiment of the present application is first introduced in detail.
[0042] See also Figure 1 , is a schematic diagram of an optical lens provided in an embodiment of the present application, including: a telescopic component and a lens group 300.
[0043] The telescopic assembly includes: a fixed part 100 and a telescopic part 200 ; the fixed part 100 is connected to the telescopic part 200 ; and the lens group 300 is arranged inside the fixed part 100 .
[0044] The fixed part 100 here refers to the part of the optical lens that always remains stationary.
[0045] It is understandable that, since the fixed part 100 remains stationary in the optical lens, the lens group 300 disposed inside the fixed part 100 should also remain stationary. During the use of the optical lens, if the optical lens needs to be adjusted, the lens group 300 is not affected by the adjustment of the optical lens and is fixed inside the fixed part 100.
[0046] Optionally, the lens group 300 may include one or more lenses. The lenses in the lens group 300 may include one or more lenses such as a focusing lens 310, an achromatic lens, a protective lens, etc. The number and type of lenses in the lens group 300 may be selected according to actual conditions.
[0047] The telescopic component mentioned above refers to a component that can be extended or shortened. The telescopic component can be arranged on the light beam transmission path, and the telescopic component can be configured to be telescopic along the light beam transmission direction.
[0048] The telescopic assembly is further configured to adjust the distance between the lens group 300 and the imaging surface by telescoping.
[0049] It should be understood that by arranging the telescopic assembly on the light beam transmission path, when adjusting the telescopic assembly, the light beam transmission path can be extended or shortened by the telescopic assembly. Since the imaging surface and the lens group 300 are arranged at both ends of the light beam transmission path, when the telescopic assembly extends or shortens the light beam transmission path, the distance between the imaging surface and the lens group 300 is also extended or shortened accordingly.
[0050] In the above implementation process, by setting the telescopic part 200 in the optical lens, the telescopic part 200 can be used to adjust the distance between the lens group 300 and the imaging surface, so that the optical lens can meet the imaging detection of objects at different positions, and increase the application scenarios of the optical lens. In addition, by setting the lens group 300 inside the fixed part 100, during the adjustment process of the optical lens, the lens group 300 can always remain fixed inside the fixed part 100, and the imaging detection of objects at different positions can be achieved by only adjusting the telescopic component, which has a simple structure and low cost.
[0051] In a possible implementation, the telescopic portion 200 includes: a first moving member 210 , a second moving member 220 and an elastic member 230 .
[0052] Among them, the first moving part 210 includes a first inclined surface 211, and the second moving part 220 includes a second inclined surface 221; the first moving part 210 and the second moving part 220 are in contact with each other through the first inclined surface 211 and the second inclined surface 221; one end of the elastic part 230 is connected to the second moving part 220, and the other end of the elastic part 230 is connected to the fixed part 100; the side of the first moving part 210 away from the second moving part 220 is in contact with the fixed part 100.
[0053] The first inclined surface 211 and the second inclined surface 221 are arranged in parallel. The first moving member 210 is configured to move on a plane of the fixed part 100 perpendicular to the light beam transmission direction.
[0054] It can be understood that, since the first moving member 210 includes the first inclined surface 211, that is, one side of the first moving member 210 is an inclined surface. Therefore, the thickness of the first moving member 210 along the vertical light beam transmission direction gradually increases or decreases. Based on the thickness change of the first moving member 210 along the vertical light beam transmission direction, the distance between the imaging surface and the lens group 300 can be adjusted by controlling the first moving member 210 to move along the vertical light beam transmission direction.
[0055] In one embodiment, the first moving member 210 is provided with a second light-transmitting element 212 , and the second light-transmitting element 212 penetrates the first moving member 210 along the light beam transmission direction, and the second light-transmitting element 212 is configured to allow the light beam to pass through.
[0056] Optionally, the second light transmitting element 212 may be in the shape of a semi-enclosed groove or a closed through hole. The structure of the second light transmitting element 212 may be selected according to actual conditions.
[0057] In one embodiment, if the second light-transmitting element 212 is in the shape of a semi-closed groove, the groove depth of the second light-transmitting element 212 is the distance from the bottom of the groove to the inner surface where the fixed part 100 contacts the top of the groove, so as to provide a light hole as large as possible through the second light-transmitting element 212, so that during the adjustment of the optical lens, the light beam is not affected by the second light-transmitting element 212.
[0058] The second moving member 220 is provided with a first light-transmitting element 222, which penetrates the second moving member 220 along the light beam transmission direction and is configured to allow the light beam to pass through. The second moving member 220 is configured to move along the light beam transmission direction when the first moving member 210 moves.
[0059] It should be understood that since the first moving member 210 includes a first inclined surface 211 and the thickness of the first moving member 210 along the direction perpendicular to the light beam transmission is different, during the movement of the first moving member 210 along the direction perpendicular to the light beam transmission, different thickness areas of the first moving member 210 contact the second moving member 220, thereby extending or shortening the length of the optical path formed by the first moving member 210 and the second moving member 220 along the direction of light beam transmission, thereby adjusting the distance between the imaging surface and the lens group 300.
[0060] Here, the second light-transmitting element 212 is larger than the first light-transmitting element 222 , so that when the first moving member 210 moves along the direction perpendicular to the light beam transmission, the first light-transmitting element 222 is always aligned with the second light-transmitting element 212 , thereby preventing the movement of the first moving member 210 from affecting the light beam path.
[0061] Optionally, the first light transmitting element 222 may be in the shape of a semi-enclosed groove or a closed through hole. The structure of the first light transmitting element 222 may be selected according to actual conditions.
[0062] For example, Figure 2 , Figure 3 As shown, the first moving member 210 may be a wedge-shaped member having a U-shaped groove thereon.
[0063] like Figure 4 As shown, the second moving member 220 may be wedge-shaped at a portion close to the first moving member 210 .
[0064] Please refer to further Figure 1 The elastic member 230 mentioned above refers to a structure that will deform under external forces, but can return to its original shape when the external force is removed.
[0065] Optionally, the elastic member 230 may include one or more elastic members 230 . The elastic member 230 may be a spring, a sponge, a rubber pad or other element. The number and type of the elastic member 230 may be selected according to actual conditions.
[0066] The elastic member 230 is configured to connect the second moving member 220 and the fixed part 100 , and the second moving member 220 is configured to compress or stretch the elastic member 230 along the light beam transmission direction. The elastic member 230 is configured to provide a movement space for the second moving member 220 .
[0067] For example, if the elastic member 230 is a spring, and the optical lens includes two springs, the two springs are arranged outside the second moving member 220 and located on both sides along the light beam transmission direction. One end of the two springs is connected to the second moving member 220, and the other end of the spring is connected to the fixed part 100.
[0068] If the elastic member 230 is a spring, and the optical lens includes four springs, the spring can be disposed around the outer surface of the second moving member 220. One end of the spring is connected to the second moving member 220, and the other end of the spring is connected to the fixed part 100.
[0069] The above-mentioned arrangement of the elastic member 230 is only exemplary, and the arrangement of the elastic member 230 can be selected according to actual conditions.
[0070] It can be understood that since one end of the elastic member 230 is connected to the second moving member 220, the elastic member 230 can provide a movable space for the second moving member 220 during the movement of the second moving member 220. The second moving member 220 moves in the movable space by compressing or stretching the elastic member 230, and then moves along the light beam transmission direction.
[0071] In one embodiment, lubricants are provided on the surfaces of the components in contact with each other in the telescopic part 200. For example, lubricants are provided between the first inclined surface 211 and the second inclined surface 221, lubricants are provided between the second moving part 220 and the fixed part 100, and lubricants are also provided between the first moving part 210 and the fixed part 100.
[0072] It should be understood that by providing lubricants on the surfaces of the components in contact with each other, the resistance of the components during movement can be reduced, thereby improving the flexibility of movement of the components in the telescopic part 200. Optionally, the optical lens further includes a first stopper, such as a convex pin (not shown). The first stopper can be provided on the surface of the fixed part 100 in contact with the first moving part 210.
[0073] It can be understood that the first limit member is configured to fix the relative position of the first moving member 210 and the fixed part 100 after the first moving member 210 and the second moving member 220 are adjusted to appropriate positions to maintain the first moving member 210 and the second moving member 220 in the current position.
[0074] In the above implementation process, by setting the first moving member 210, the second moving member 220 and the elastic member 230 to cooperate, the first moving member 210 and the second moving member 220 are moved, thereby adjusting the light beam transmission path, and increasing the application scenarios of the optical lens. In addition, the entire telescopic part 200 only includes the first moving member 210, the second moving member 220 and the elastic member 230, which can simplify the structure of the optical lens and reduce the cost of the optical lens.
[0075] In a possible implementation, the telescopic assembly further includes: an adjusting member 240 .
[0076] One end of the adjusting member 240 contacts one side of the first moving member 210 along the moving direction of the first moving member 210 ; the other end of the adjusting member 240 penetrates the fixing portion 100 and extends to the outside of the fixing portion 100 .
[0077] The adjusting member 240 here refers to a component used to adjust the moving direction of the first moving member 210. For example, components such as screws, bolts, pull rods, cylinders, etc., and the adjusting member 240 can be selected according to actual conditions.
[0078] The adjusting member 240 is configured to move in a direction perpendicular to the light beam transmission, and the first moving member 210 is configured to move along with the adjusting member 240 during the process of contacting the adjusting member 240 .
[0079] In one embodiment, the end of the adjusting member 240 that contacts the first moving member 210 is arc-shaped.
[0080] It can be understood that since the arc shape is relatively soft, setting the end of the adjusting member 240 that contacts the first moving member 210 to an arc shape can reduce the excessive impact of the adjusting member 240 on the first moving member 210 during the process of adjusting the first moving member 210, thereby improving the safety of the first moving member 210 and extending the service life of the first moving member 210.
[0081] It should be understood that since the end of the adjustment member 240 away from the first moving member 210 extends to the outside of the fixed part 100, the first moving member 210 and the second moving member 220 can be controlled outside the optical lens, thereby adjusting the distance between the lens group 300 and the imaging surface.
[0082] The distance between the lens group 300 and the imaging surface can adjust the clarity of the optical lens imaging.
[0083] Optionally, a second position-limiting member may be provided on the adjusting member 240 , and the second position-limiting member may be provided on the adjusting member.
[0084] It can be understood that after the adjusting member 240 adjusts the first moving member 210 and the second moving member 220 to appropriate positions, the second limiting member is configured to limit the current position of the adjusting member 240, thereby keeping the first moving member 210 and the second moving member 220 at the current position.
[0085] The first and second limiters can be provided at the same time, or only one can be provided. The first and second limiters can be of the same structure, or of different structures. The first and second limiters can be selected according to actual conditions.
[0086] In the above implementation process, by setting an adjustment member 240, and one end of the adjustment member 240 is set outside the fixed part 100, the adjustment member 240 can be directly controlled outside the optical lens, thereby realizing the control of the first moving member 210 and the second moving member 220, which can improve the control flexibility of the first moving member 210 and the second moving member 220.
[0087] In a possible implementation, a buffer member is disposed at one end of the adjusting member 240 facing the first moving member 210 .
[0088] The buffer here refers to the component used to alleviate the vibration and impact generated by the equipment during movement.
[0089] Optionally, the buffer may be rubber, spring, sponge, plastic, etc. The buffer may be selected according to actual conditions.
[0090] It can be understood that by providing a buffer member at one end of the adjusting member 240 facing the first moving member 210, when the adjusting member 240 adjusts the first moving member 210, the buffer member can alleviate the vibration and impact between the first moving member 210 and the adjusting member 240, thereby reducing the impact of the adjusting member 240 on the first moving member 210 and extending the service life of the first moving member 210.
[0091] In the above implementation process, a buffer member is provided at one end of the adjusting member 240 toward the first moving member 210. During the process of the adjusting member 240 adjusting the first moving member 210, the buffer member can alleviate the vibration and impact between the first moving member 210 and the adjusting member 240, thereby reducing the impact of the adjusting member 240 on the first moving member 210 and extending the service life of the first moving member 210.
[0092] In a possible implementation, the outer surface of the adjusting member 240 contacting the fixing portion 100 is provided with a first thread; and the inner surface of the fixing portion 100 contacting the adjusting member 240 is provided with a second thread.
[0093] The first thread is matched with the second thread, and the adjusting member 240 moves on a plane of the fixing part 100 perpendicular to the light beam transmission direction through the first thread and the second thread.
[0094] Optionally, the first thread may be an internal thread, and the second thread may be an external thread. The first thread may also be an external thread, and the second thread may be an internal thread. The specific structures of the first thread and the second thread may be selected according to actual conditions.
[0095] It should be understood that since the first thread is adapted to the second thread, by rotating the adjusting member 240 to extend to the outside of the fixed part 100, the adjusting member 240 can be moved along the direction perpendicular to the light beam transmission, thereby driving the first moving member to move along the direction perpendicular to the light beam transmission, thereby realizing the movement adjustment of the first moving member 210.
[0096] The optical lens can be adjusted in such a way that the tension adjusting member 240 can push the first moving member 210, and the second moving member 220 can be pushed to move along the light beam transmission direction by the inclined surfaces of the first moving member 210 and the second moving member 220, thereby completing the telescopic movement.
[0097] It should be understood that since the first thread is adapted to the second thread, after the adjusting member 240 is adjusted to an appropriate position, the position of the adjusting member 240 is fixed at the current position and does not change due to the interaction between the first thread and the second thread, thereby achieving fixation of the adjusting member 240.
[0098] In the above implementation process, by providing the first thread and the second thread, the adjusting member 240 can be rotated so that the adjusting member 240 moves on a plane of the fixed part 100 perpendicular to the light beam transmission direction, thereby realizing flexible adjustment of the adjusting member 240. In addition, the position of the adjusting member 240 can be fixed by the first thread and the second thread, so that after the adjustment of the adjusting member 240 is completed, the position of the adjusting member 240 remains unchanged, thereby improving the adjustment stability.
[0099] In one possible implementation, Figure 4 As shown, the second moving member 220 includes an inclined portion and a cavity portion.
[0100] The inclined portion and the cavity portion are connected; the first light-transmitting element 222 is disposed in both the inclined portion and the cavity portion, and the first light-transmitting elements 222 of the inclined portion and the cavity portion are aligned; and the first moving part 210 is provided with a second light-transmitting element 212 .
[0101] The second light-transmitting element 212 is longer than the first light-transmitting element 222 in the direction perpendicular to the light beam transmission; wherein, when the first moving member 210 and the second moving member 220 are in contact, the first light-transmitting element 222 is always aligned with the second light-transmitting element 212 .
[0102] In one embodiment, the cavity portion may be a long straight cylindrical structure, and the inclined portion may be a trapezoidal structure.
[0103] During the adjustment process, the position of the second moving member 220 in the direction perpendicular to the light beam transmission does not change, thereby making the light beam transmission path always remain unchanged in the direction perpendicular to the light beam transmission.
[0104] In the above implementation process, by setting the length of the second light-transmitting element 212 in the direction perpendicular to the light beam transmission to be greater than the first light-transmitting element 222, the first light-transmitting element 222 can be always aligned with the second light-transmitting element 212 during the movement of the first moving member 210 and the second moving member 220, thereby making the light beam transmission path always remain unchanged along the direction perpendicular to the light beam transmission, thereby reducing the difficulty of adjusting the optical lens.
[0105] In a possible implementation, the slope portion and the cavity portion fit the fixing portion 100 .
[0106] The fixing portion 100 here is configured to fix the position of the second moving member 220 along a direction perpendicular to the transmission direction of the light beam.
[0107] It can be understood that since the inclined portion and the cavity portion are in contact with the fixed portion 100, the fixed portion 100 can fix the position of the second movable member 220 along the direction perpendicular to the light beam transmission, thereby preventing the position of the second movable member 220 along the direction perpendicular to the light beam transmission from changing, thereby ensuring that the second movable member 220 is coaxial with the lens group 300.
[0108] The second moving member 220 moves along the direction of light beam transmission.
[0109] In the above implementation process, by setting the inclined surface and the cavity portion of the second movable part 220 to fit with the fixed part 100, the position of the second movable part 220 in the direction of vertical light beam transmission can be limited by the fixed part 100, so that during the adjustment of the optical lens, the first movable part 210, the second movable part 220 and the lens group 300 are always coaxial, thereby improving the stability of the optical path in the optical lens.
[0110] In one possible implementation, the fixed part 100 includes: a fixed seat 110 and a cavity 120; the fixed seat 110 is fixedly connected to the cavity 120; the lens group 300 is arranged inside the fixed seat 110; the first moving part 210 is arranged inside the cavity 120; the side of the first moving part 210 away from the second moving part 220 is in contact with the fixed seat 110; the end of the second moving part 220 close to the first moving part 210 is arranged inside the cavity 120, and the end of the second moving part 220 away from the first moving part 210 is arranged outside the cavity 120.
[0111] The fixing seat 110 is provided with a light-through hole, and the light-through hole is configured to allow a light beam to pass through.
[0112] Optionally, the fixing base 110 and the cavity 120 can be connected by welding, bonding, or integrated. The connection method between the fixing base 110 and the cavity 120 can be selected according to actual conditions.
[0113] In one embodiment, the first moving member 210 , the elastic member 230 , and an end close to the first moving member 210 are all disposed inside the cavity 120 .
[0114] Wherein, gaps are provided between the two ends of the first moving member 210 along the vertical light beam transmission direction and the cavity 120 , and the gaps are used to provide movement space for the first moving member 210 .
[0115] like Figure 5 As shown, one or more first guide surfaces 121 are provided on the cavity 120 , and the first guide surfaces 121 are arranged in a direction perpendicular to the light beam transmission direction.
[0116] The first moving member 210 contacts the first guide surface 121 , and the first guide surface 121 is configured to constrain the first moving member 210 to move along the guide direction.
[0117] like Figure 6 As shown, the cavity 120 is provided with one or more second guide surfaces 122 , and the second guide surfaces 122 are arranged in multiple directions surrounding the light beam transmission direction.
[0118] The surface of the portion of the second moving member 220 disposed inside the cavity 120 is in contact with the second guide surface 122 , and the second guide surface 122 is configured to constrain the second moving member 220 from rotating during movement.
[0119] In the above implementation process, by setting the lens group 300 inside the fixing seat 110, during the adjustment of the telescopic component in the cavity 120, the position of the lens in the lens group 300 remains unchanged, and then the imaging detection of objects in different positions is achieved by adjusting the telescopic component. The whole device has a simple structure and low cost.
[0120] In a possible implementation, the lens assembly 300 includes: a focusing lens 310 and an achromatic module, and the focusing lens 310 is made of quartz material.
[0121] The achromatic module here is configured to supplement the achromatic capability of the focusing lens 310 .
[0122] It should be understood that the focusing lens 310 in the laser head is used without considering the achromatic ability of the focusing lens 310. Therefore, the achromatic ability of these focusing lenses 310 is relatively weak. By providing an achromatic module, the achromatic module can be used in conjunction with the focusing lens 310, thereby optimizing the achromatic ability of the focusing lens 310.
[0123] In one embodiment, if Figure 7 As shown, the achromatic module may include: a first achromatic cemented lens group 320 , a second achromatic cemented lens group 330 and a positive focus lens 340 .
[0124] Among them, the first achromatic cemented lens group 320, the second achromatic cemented lens group 330 and the positive focus lens 340 are coaxially arranged; the second achromatic cemented lens group 330 is arranged between the first achromatic cemented lens group 320 and the positive focus lens 340; the first achromatic cemented lens group 320 is arranged on the side close to the focusing lens 310, and the positive focus lens 340 is arranged on the side away from the focusing lens 310.
[0125] It should be understood that the light beam is imaged on the imaging surface through the focusing lens 310, the first achromatic cemented lens group 320, the second achromatic cemented lens group 330 and the positive focusing lens 340 in sequence.
[0126] The light beam may be a visible light beam, which is emitted or reflected by the imaging object and then passes through the protective lens, focusing lens, etc. of the laser processing head in sequence to finally reach the imaging surface.
[0127] Here, the first achromatic cemented lens group 320 may include a biconvex spherical mirror, the second achromatic cemented lens group 330 may include a biconcave spherical mirror, and the positive focus lens 340 may include a biconvex spherical mirror or a positive curved moon mirror.
[0128] The first achromatic cemented lens group 320 may be made of crown glass material, the second achromatic cemented lens may be made of flint glass material, and the positive focus lens 340 may be made of flint glass material.
[0129] The focusing lens 310 , the first achromatic cemented lens group 320 , the second achromatic cemented lens group 330 and the positive focusing lens 340 are coaxially arranged.
[0130] It can be understood that during the adjustment of the optical lens, the lenses in the achromatic module are fixed, and the distance between the imaging plane and the positive focus lens 340 is adjusted by the telescopic component to achieve imaging detection of objects at different positions.
[0131] In one embodiment, an adjustable aperture diaphragm may be further provided in the optical lens, and the adjustable aperture diaphragm is configured to adjust the amount of light entering the optical lens.
[0132] Optionally, the adjustable aperture diaphragm can be arranged on a side of the first achromatic cemented lens group 320 away from the second achromatic cemented lens group 330, the adjustable aperture diaphragm can also be arranged between the first achromatic cemented lens group 320 and the second achromatic cemented lens group 330, the adjustable aperture diaphragm can also be arranged between the second achromatic cemented lens group 330 and the positive focus lens 340, and the adjustable aperture diaphragm can also be arranged on a side of the positive focus lens 340 away from the second achromatic cemented lens group 330. The setting position of the adjustable aperture diaphragm can be selected according to actual conditions.
[0133] Wherein, the adjustable aperture diaphragm is configured to adjust the brightness of the optical lens.
[0134] In the above implementation process, since the focusing lens 310 is made of quartz material, the achromatic ability of the quartz material is relatively weak. By setting the first achromatic cemented lens group 320, the second achromatic cemented lens group 330 and the positive focus lens 340 to form an achromatic module, the achromatic ability of the focusing lens 310 can be optimized. Compared with ordinary industrial lenses, the clarity of the optical lens can be improved.
[0135] See also Figure 8 , is a flow chart of an optical lens adjustment method provided in an embodiment of the present application, which is applied to the optical lens in the above embodiment or an optical lens with a similar functional structure. The optical lens adjustment method includes:
[0136] Step S201 , determining the moving distance of the lens assembly 300 relative to the imaging plane according to the position change of the object to be detected, the focal length of the focusing lens 310 and the focal length of the achromatic module.
[0137] In one embodiment, the moving distance can be determined by the following formula:
[0138] Wherein, d is the moving distance, L is the position change of the object to be detected, F1 is the focal length of the focusing lens 310, and F2 is the focal length of the achromatic module.
[0139] It can be understood that by setting the movement distance of the lens group 300 relative to the imaging plane according to the position change of the object to be detected, the focal length of the focusing lens 310 and the focal length of the achromatic module, a small telescopic amount in the optical lens can be adjusted to meet the imaging detection of a longer distance before and after the focus of the focusing lens 310, thereby increasing the application scenarios of the optical lens.
[0140] For example, Figure 7 As shown, if the focal length of the focusing lens 310 is 200mm, the focal length of the achromatic module is 75mm, and the distance between the focusing lens 310 and the achromatic module is about 200mm, then when adjusting the distance between the imaging surface and the achromatic module, the adjustment amount is ±3mm, and a clear observation range of about ±20mm before and after the focus of the focusing lens 310 can be achieved.
[0141] Step S202 , controlling the adjustment member 240 in the optical lens to move along a direction perpendicular to the light beam transmission direction according to the moving distance.
[0142] The adjusting member 240 drives the first moving member 210 to move along a direction perpendicular to the light beam transmission during the movement; the first moving member 210 drives the second moving member 220 to move along the light beam transmission direction during the movement.
[0143] The first moving member 210 and the second moving member 220 are configured to extend or shorten the distance between the lens group 300 in the optical lens and the imaging surface through cooperation.
[0144] In one embodiment, when the moving distance is determined, the adjustment amount of the adjusting member 240 can be further determined according to the moving distance.
[0145] Optionally, the moving distance may be set in a corresponding relationship with the adjustment amount of the adjustment member 240, or a relationship formula between the moving distance and the adjustment amount of the adjustment member 240 may be set. The specific method of determining the adjustment amount according to the moving distance may be selected according to actual conditions.
[0146] Optionally, if the optical lens is further provided with an adjustable aperture diaphragm, the brightness of the optical lens can be adjusted by adjusting the adjustable aperture diaphragm.
[0147] It is understandable that when using the optical lens, if the image clarity of the target imaging object in the optical imaging lens is poor, the current positions of the first moving member 210 and the second moving member 220 can be adjusted by the adjusting member 240 so that the distance between the lens group 300 and the imaging surface is maintained at a better imaging distance, thereby making the image clarity of the target imaging object in the optical imaging lens meet the imaging requirements. In addition, if the brightness of the target imaging object in the optical imaging lens is also poor, the size of the light hole through which the light beam passes can be adjusted by adjusting the adjustable aperture diaphragm, thereby achieving brightness adjustment, so that the image brightness of the target imaging object in the optical imaging lens meets the imaging requirements.
[0148] For example, when the target imaging object is located far away, the distance between the lens group 300 and the imaging surface can be extended by adjusting the first moving member 210 and the second moving member 220, thereby obtaining a clear image of the target imaging object. In this case, the adjusting member 240 can be adjusted to move upward, thereby driving the thicker side of the first moving member 210 to contact the second moving member 220, extending the light beam path formed by the first moving member 210 and the second moving member 220, and further extending the distance between the lens group 300 and the imaging surface, thereby achieving clarity adjustment of the optical lens.
[0149] When the target imaging object is located relatively close, the distance between the lens group 300 and the imaging surface can be shortened by adjusting the first moving member 210 and the second moving member 220, thereby obtaining a clear image of the target imaging object. In this case, the adjusting member 240 can be adjusted to move downward, thereby driving the thinner side of the first moving member 210 to contact the second moving member 220, shortening the light beam path formed by the first moving member 210 and the second moving member 220, and further shortening the distance between the lens group 300 and the imaging surface, thereby achieving clarity adjustment of the optical lens.
[0150] In the above implementation process, by setting the movement distance of the lens group 300 relative to the imaging plane according to the position change of the object to be detected, the focal length of the focusing lens 310 and the focal length of the achromatic module, a small telescopic amount in the optical lens can be adjusted to meet the imaging detection of a longer distance before and after the focus of the focusing lens 310, thereby increasing the application scenarios of the optical lens.
[0151] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0152] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. An optical lens, characterized in that: include: Telescopic assembly and lens group; The telescopic assembly comprises: a fixed part and a telescopic part; The fixed part is connected to the telescopic part; The lens group is arranged inside the fixed part; Wherein, the telescopic component is configured to be telescopic along the light beam transmission direction; the telescopic component is also configured to adjust the distance between the lens group and the imaging surface by telescoping.
2. The optical lens according to claim 1, characterized in that: The telescopic part comprises: a first moving part, a second moving part and an elastic part; The first moving member includes a first inclined surface, and the second moving member includes a second inclined surface; The first moving member and the second moving member are in contact with each other through the first inclined surface and the second inclined surface, and the first inclined surface and the second inclined surface are arranged in parallel; One end of the elastic member is connected to the second moving member, and the other end of the elastic member is connected to the fixed part; The first moving member is in contact with the fixed part at a side away from the second moving member; the first moving member is configured to move on a plane of the fixed part perpendicular to the light beam transmission direction; Wherein, the second moving member is configured to move along the light beam transmission direction during the movement of the first moving member.
3. The optical lens according to claim 2, characterized in that: The telescopic assembly further includes: an adjusting member; One end of the adjusting member contacts one side of the first moving member along the moving direction of the first moving member; The other end of the adjusting member passes through the fixing portion and extends to the outside of the fixing portion; The adjusting member is configured to move in a direction perpendicular to the light beam transmission, and the first moving member is configured to move along with the adjusting member during contact with the adjusting member.
4. The optical lens according to claim 3, characterized in that: A buffer is provided at one end of the adjusting member facing the first moving member.
5. The optical lens according to claim 3, characterized in that: The outer surface of the adjusting member contacting the fixing portion is provided with a first thread; The inner surface of the fixing portion contacting the adjusting member is provided with a second thread; The first thread is matched with the second thread, and the adjusting member moves on a plane of the fixed part perpendicular to the light beam transmission direction through the first thread and the second thread.
6. The optical lens according to claim 2, characterized in that: The second moving member comprises: an inclined portion and a cavity portion; The inclined portion is connected to the cavity portion; The first light-transmitting element is disposed in both the inclined surface portion and the cavity portion, and the first light-transmitting elements of the inclined surface portion and the cavity portion are aligned; The first moving member is provided with a second light-transmitting element; The length of the second light-transmitting element in the direction perpendicular to the light beam transmission is greater than that of the first light-transmitting element; and when the first moving member and the second moving member are in contact, the first light-transmitting element is always aligned with the second light-transmitting element.
7. The optical lens according to claim 6, characterized in that: The inclined surface portion and the cavity portion are in contact with the fixing portion; the fixing portion is configured to fix the position of the second moving part along a direction perpendicular to the light beam transmission direction; Wherein, the second moving member moves along the direction of light beam transmission.
8. The optical lens according to claim 2, characterized in that: The fixing part comprises: a fixing seat and a cavity; The fixing seat is fixedly connected to the cavity; The lens group is arranged inside the fixing seat; The first moving member is arranged inside the cavity; A side of the first moving member away from the second moving member is in contact with the fixing seat; One end of the second moving member close to the first moving member is arranged inside the cavity, and one end of the second moving member away from the first moving member is arranged outside the cavity.
9. The optical lens according to claim 1, characterized in that: The lens group comprises: a focusing lens and an achromatic module, wherein the focusing lens is made of quartz material; wherein the achromatic module is configured to supplement the achromatic ability of the focusing lens; The achromatic module comprises: a first achromatic cemented lens group, a second achromatic cemented lens group and a positive focus lens; The first achromatic cemented lens group, the second achromatic cemented lens group and the positive focus lens are coaxially arranged; The second achromatic cemented lens group is arranged between the first achromatic cemented lens group and the positive focus lens; The first achromatic cemented lens group is arranged on a side close to the focusing lens, and the positive focus lens is arranged on a side away from the focusing lens; The light beam is imaged on the imaging surface through the focusing lens, the first achromatic cemented lens group, the second achromatic cemented lens group and the positive focus lens in sequence.
10. An optical lens adjustment method, characterized in that: Applied to the optical lens according to any one of claims 1 to 9, the method comprising: Determine the moving distance of the lens group relative to the imaging surface according to the position change of the object to be detected, the focal length of the focusing lens in the optical lens, and the focal length of the achromatic module in the optical lens; According to the moving distance, the adjusting member in the optical lens is controlled to move along the direction perpendicular to the light beam transmission; wherein, during the movement of the adjusting member, the first moving member is driven to move along the direction perpendicular to the light beam transmission; during the movement of the first moving member, the second moving member is driven to move along the light beam transmission direction; The first moving member and the second moving member are configured to extend or shorten the distance between the lens group in the optical lens and the imaging surface through cooperation.