Assembly device and lens assembly method

Abstract

The present disclosure provides an assembly device and a lens assembly method for assembling an optical lens into a lens barrel, comprising: a first positioning device, a second positioning device, a visual acquisition device, an assembly device and a driving device. The first positioning device is configured to fix the lens barrel. The second positioning device is configured to fix the optical lens. The visual acquisition device is configured to obtain an image of the optical lens. The assembly device is configured to absorb the optical lens in the second positioning device. The assembly device has a degree of freedom at least in the optical axis direction of the optical lens. The driving device is configured to drive the assembly device to drive the optical lens to be assembled into place with the lens barrel along the optical axis direction of the optical lens. In an embodiment of the present disclosure, the assembly device can slowly increase the force acting on the optical lens, protect the optical lens, and effectively reduce the damage rate of the optical lens.

Description

Technical Field

[0001] The present invention relates to the field of lenses, and in particular to an assembly device and a lens assembly method. Background Art

[0002] The lens includes one or more optical lenses, which are installed in the lens barrel in a preset position. In some application fields, such as LiDAR, the requirements for the accuracy and size of the lens are high. In small-sized lenses, the structure of the optical lens is relatively fragile. When assembling the lens and the optical lens, the optical lens is easily damaged, resulting in a decrease in the lens yield and an increase in production costs. Summary of the invention

[0003] In view of one or more defects in the prior art, the present disclosure provides an assembly device for assembling an optical lens into a lens barrel, the assembly device comprising:

[0004] A first positioning device configured to fix the lens barrel;

[0005] A second positioning device, configured to fix the optical lens;

[0006] A visual acquisition device configured to acquire an image of the optical lens;

[0007] An assembling device is configured to absorb the optical lens in the second positioning device; the assembling device has freedom at least in the optical axis direction of the optical lens; and a driving device is configured to drive the assembling device to drive the optical lens to be assembled into place with the lens barrel along the optical axis direction of the optical lens.

[0008] Optionally, the assembling device comprises:

[0009] At least two elastic members, wherein the at least two elastic members are configured to be able to undergo elastic deformation in the optical axis direction of the optical lens, and the at least two elastic members are not on the same straight line.

[0010] Optionally, the assembling device further comprises:

[0011] The limiting member is configured to limit the elastic deformation of the elastic member, and the elastic deformation of the elastic member is not greater than 0.5 mm.

[0012] Optionally, the assembling device further comprises:

[0013] The sensor is configured to obtain the elastic force or elastic deformation of the elastic member to detect the force exerted by the assembling device and the lens barrel on the optical lens.

[0014] Optionally, the assembling device comprises:

[0015] The adsorption structure is configured to adsorb the optical lens.

[0016] Optionally, the assembling device also has freedom in a plane perpendicular to the optical axis direction of the optical lens.

[0017] Optionally, the assembling device further comprises:

[0018] The first structural layer and the second structural layer are arranged in parallel along the optical axis direction of the optical lens;

[0019] Among them, the first ends of the at least two elastic members abut against the first structural layer, the second ends of the elastic members abut against the second structural layer, the first structural layer is provided with a connecting member, the second structural layer is provided with a matching part, the connecting member is embedded in the matching part, and the connecting member is movable in the matching part, and the connecting member is configured to provide the assembly device with freedom in a plane perpendicular to the optical axis direction of the optical lens.

[0020] Optionally, the matching portion has an inclined surface, and the inclined surface is configured to guide the connector to reset when the first structural layer and the second structural layer are separated from each other.

[0021] Optionally, the visual acquisition device includes: a first camera, when the optical lens is in the second positioning device, or when the optical lens is assembled into the lens barrel, the first camera is configured to obtain a first image of the optical lens in a first direction, the first direction being parallel to the optical axis direction;

[0022] At least one of the second positioning device or the driving device is configured to adjust the posture of the optical lens according to the first image.

[0023] Optionally, the visual acquisition device further includes: a second camera, when the assembling device absorbs the optical lens, the second camera is configured to obtain a second image of the optical lens in a second direction, the second direction being parallel to the optical axis direction and opposite to the first direction;

[0024] The driving device is configured to adjust the posture of the optical lens according to the second image.

[0025] Optionally, the first positioning device includes:

[0026] a first positioning groove, wherein the shape of the first positioning groove matches the shape of the lens barrel;

[0027] The first fixing member is configured to move toward the first positioning groove to fix the lens barrel in the first positioning groove.

[0028] Optionally, the second positioning device includes:

[0029] a second positioning groove, wherein the shape of the second positioning groove matches the shape of the optical lens;

[0030] The second fixing member is configured to move toward the second positioning groove to fix the optical lens in the second positioning groove.

[0031] Optionally, the second positioning device further includes: a first detector configured to detect at least one of the following two items:

[0032] Whether the optical lens is in the second positioning groove;

[0033] The positive and negative directions of the optical lens in the second positioning groove.

[0034] Optionally, the assembly device further comprises:

[0035] The pressing sheet fixing device is configured to fix the pressing sheet and fix the optical lens and the lens barrel together through the pressing sheet when the pressing sheet fixing device is flipped onto the first positioning device.

[0036] Optionally, the tablet fixing device includes: a second detector configured to detect whether the tablet is located on the tablet fixing device.

[0037] Optionally, the present disclosure further includes a lens assembly method, the lens assembly method comprising:

[0038] Fix the lens barrel and optical lenses;

[0039] Determine the position of the optical lens in a first direction, where the first direction is parallel to the optical axis direction of the optical lens;

[0040] Absorbing the optical lens;

[0041] Assembling the lens barrel and the optical lens along the first direction;

[0042] Wherein, the optical lens can float in the direction of the optical axis during the assembly process.

[0043] Optionally, the step of absorbing the optical lens further comprises:

[0044] Taking out the optical lens;

[0045] Determine the position of the optical lens in a second direction, where the second direction is parallel to the optical axis direction of the optical lens and opposite to the first direction.

[0046] Optionally, the lens assembly method further includes:

[0047] Adjust the posture of the optical lens according to the first image of the optical lens in the first direction and the second image of the second direction.

[0048] Optionally, the step of absorbing the optical lens further comprises:

[0049] Suctioning the optical lens and placing it on the lens barrel;

[0050] Determine the position and posture of the optical lens in a first direction, and adjust the position and posture of the optical lens.

[0051] Optionally, the assembling of the lens barrel and the optical lens further comprises:

[0052] The optical lens and the lens barrel are fixed together by a pressing sheet.

[0053] Optionally, the lens assembly method is performed by the aforementioned assembly device.

[0054] The embodiment of the present disclosure provides an assembly device, which uses a first positioning device to fix the lens, uses a second positioning device to fix the optical lens, uses a driving device to drive the assembly device to adsorb the optical lens, and assembles it into place with the lens barrel along the optical axis. The assembly device has a degree of freedom in the direction of the optical axis. The beneficial effect of the present invention is that when assembling the optical lens along the direction of the optical axis, the degree of freedom provided by the assembly device can slowly increase the force acting on the optical lens, protect the optical lens, and effectively reduce the damage rate of the optical lens. The visual acquisition device can obtain an image of the optical lens and is used to guide the assembly process of the optical lens, which is conducive to improving the assembly accuracy of the optical lens.

[0055] The present disclosure also relates to a lens assembly method, in which the optical lens can float in the optical axis direction during the assembly process, thereby protecting the optical lens, reducing the probability of the optical lens being damaged by pressure or shearing, improving the yield of lens assembly, and reducing production costs. The lens assembly method also includes determining the position of the optical lens in a first direction, the first direction being parallel to the optical axis direction of the optical lens, thereby improving the positioning accuracy of the optical lens and facilitating improving the assembly accuracy of the optical lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0057] Figure 1 A schematic structural diagram of an exemplary first assembly device consistent with some embodiments of the present disclosure is shown;

[0058] Figure 2A schematic structural diagram of an exemplary first positioning device consistent with some embodiments of the present disclosure is shown;

[0059] Figure 3 A schematic structural diagram of an exemplary second positioning device consistent with some embodiments of the present disclosure is shown;

[0060] Figure 4 A schematic diagram showing an exemplary visual acquisition device consistent with some embodiments of the present disclosure is shown;

[0061] Figure 5 A schematic diagram of an exemplary assembly device consistent with some embodiments of the present disclosure is shown;

[0062] Figure 6 shows a cross-sectional view of an exemplary first structural layer and a second structural layer away from each other consistent with some embodiments of the present disclosure;

[0063] Figure 7 shows a cross-sectional view of an exemplary first structural layer and a second structural layer in proximity to each other consistent with some embodiments of the present disclosure;

[0064] Figure 8 A schematic structural diagram of an exemplary tablet fixing device consistent with some embodiments of the present disclosure is shown;

[0065] Fig. 9 A schematic flow chart showing an exemplary first lens assembly method consistent with some embodiments of the present disclosure is shown;

[0066] Fig.10 A schematic flow chart showing an exemplary second lens assembly method consistent with some embodiments of the present disclosure is shown;

[0067] Fig.11 A schematic flowchart of an exemplary third lens assembly method consistent with some embodiments of the present disclosure is shown.

[0068] Explanation of reference numerals: 100-assembly device; 102-first positioning device 1; 104-second positioning device 1; 106-visual acquisition device 1; 108-assembly device 1; 110-driving device; 112-pressing and fixing device 1; 114-lens barrel 1; 116-optical lens 1; 118-pressing and fixing device 1; 202-first positioning device 2; 214-lens barrel 2; 222-first positioning groove; 224-first fixing member; 304-second positioning device 2; 316-optical lens 2; 322-second positioning groove; 324-second fixing member; 406-visual acquisition device 2; 416-optical lens Piece three; 422-first camera; 424-second camera; 508-assembly device two; 522-elastic piece one; 524-limiting piece; 526-sensor; 528-adsorption structure; 530-baffle; 622-elastic piece two; 632-first structural layer one; 634-second structural layer one; 636-connecting piece one; 638-matching part one; 640-inclined surface one; 722-elastic piece three; 732-first structural layer two; 734-second structural layer two; 736-connecting piece two; 738-matching part two; 740-inclined surface two; 812-pressing piece fixing device two; 818-pressing piece two; O-optical axis. DETAILED DESCRIPTION

[0069] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present disclosure. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0070] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0071] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0072] In the present disclosure, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0073] The disclosure below provides many different embodiments or examples to realize different structures of the present disclosure. In order to simplify the disclosure of the present disclosure, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present disclosure. In addition, the present disclosure can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present disclosure provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0074] The embodiments of the present disclosure are described below in conjunction with the accompanying drawings. It should be understood that the embodiments described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.

[0075] The present disclosure provides some assembly devices, which are used to assemble optical lenses into lens barrels. For example, Figure 1The assembly device 100 is shown. The assembly device includes a first positioning device, a second positioning device, a visual acquisition device, an assembly device and a driving device. In different embodiments, the first positioning device includes a first positioning device 1 and a first positioning device 2; the second positioning device includes a second positioning device 1 and a second positioning device 2; the visual acquisition device includes a visual acquisition device 1 and a visual acquisition device 2; the assembly device includes an assembly device 1 and an assembly device 2. In different embodiments, the lens barrel is represented by a lens barrel 1 and a lens barrel 2; and the optical lens is represented by an optical lens 1, an optical lens 2 and an optical lens 3.

[0076] The first positioning device is configured to fix the lens barrel. The second positioning device is configured to fix the optical lens. The visual acquisition device is configured to obtain an image of the optical lens. The assembly device is configured to absorb the optical lens in the second positioning device, and the assembly device has a degree of freedom in the optical axis direction of the optical lens. The driving device is configured to drive the assembly device to drive the optical lens to be assembled with the lens barrel along the optical axis direction of the optical lens.

[0077] In some embodiments, the first positioning device can keep the position of the lens barrel fixed. The second positioning device can keep the position of the optical lens fixed. After the assembly device absorbs the optical lens from the second positioning device, it installs the optical lens in the lens barrel along the optical axis direction of the optical lens. The assembly device has a degree of freedom in the optical axis direction of the optical lens. When the optical lens is assembled using the assembly device, the assembly device can perform a certain deformation or displacement along the optical axis direction so that the force acting on the optical lens increases slowly. Reduce the probability or degree of rigid extrusion between the optical lens and the lens barrel, reduce the peak value of pressure or shear force, protect the optical lens, and improve the yield of the lens assembly process. The visual acquisition device can obtain an image of the optical lens. By analyzing the image or comparing it with standard parameters, the optical lens can be positioned, which is conducive to improving the assembly accuracy of the lens.

[0078] Figure 1 A schematic diagram of an exemplary assembly device consistent with some embodiments of the present disclosure is shown. Figure 1, the assembly device 100 is used to assemble the optical lens 116 in the lens barrel 114. The assembly device 100 includes a first positioning device 102, a second positioning device 104, a visual acquisition device 106, an assembly device 108 and a driving device 110. Among them, the first positioning device 102 can fix the lens barrel 114. For example, the first positioning device 102 can clamp or press the lens barrel 114 through a mechanical structure. For another example, the first positioning device 102 can fix the lens barrel 114 using positioning members such as positioning bolts. The second positioning device 104 can fix the optical lens 116. For example, the second positioning device 104 can be clamped at the edge position of the optical lens 116 through a mechanical structure. For another example, the second positioning device 104 can be adsorbed on the optical surface of the optical lens 116 through an adsorption structure.

[0079] The first positioning device 102 keeps the lens barrel 114 fixed, and the second positioning device 104 keeps the optical lens 116 fixed. During the lens assembly process, the first positioning device 102 and the second positioning device 104 reduce the probability of uncontrolled movement or rotation of the lens barrel 114 and the optical lens 116, which affects the assembly accuracy of the lens, or generates excessive force between the lens barrel 114 and the optical lens 116, resulting in damage to the optical lens 116.

[0080] The visual acquisition device 106 can acquire an image of the optical lens 116. For example, the visual acquisition device 106 is an image sensor, such as a linear camera or a line array camera. The visual acquisition device 106 can photograph the optical lens 116 through industrial cameras such as linear cameras and line array cameras. In some embodiments, the visual acquisition device 106 can also use a variety of different industrial cameras, or cooperate with different light sources to acquire one or more images of the optical lens 116.

[0081] In some embodiments, when the second positioning device 104 fixes the optical lens 116, the visual acquisition device 106 obtains an image of the optical lens 116. The image of the optical lens 116 can be used to adjust the position or posture of the optical lens 116 in the second positioning device 104. For example, the image of the optical lens 116 can be used to adjust the angle of the optical lens 116 in the second positioning device 104.

[0082] In some embodiments, during the process of assembling the optical lens 116 in the lens barrel 114 , the visual acquisition device 106 can obtain an image of the optical lens 116 , which can be used to improve the assembly accuracy of the optical lens 116 .

[0083] In some embodiments, after the lens barrel 114 and the optical lens 116 are assembled, the visual acquisition device 106 can obtain an image of the optical lens 116 , which can be used to detect the assembly accuracy of the optical lens 116 .

[0084] In some embodiments, the visual acquisition device 106 can be moved. For example, the lens barrel 114 and the optical lens 116 can change positions, and the visual acquisition device 106 can move or adjust the angle according to the positions of the lens barrel 114 and the optical lens 116. The visual acquisition device 106 is movable relative to the first positioning device 102 and the second positioning device 104 to reduce the probability of mutual interference between the visual acquisition device 106 and other devices, for example, to reduce the probability of mutual interference between the visual acquisition device 106 and the assembly device 108. In some embodiments, the visual acquisition device 106 is driven by a motor or manually controlled by an operator to move to the top of the optical lens 116 to obtain an image of the optical lens 116. A limit structure can be set at a preset position, which is conducive to improving the positioning accuracy of the visual acquisition device 106 and improving the accuracy of the image of the optical lens 116 obtained.

[0085] The assembly device 108 can absorb the optical lens 116 in the second positioning device 104. For example, the assembly device 108 moves relative to the second positioning device 104, approaches the optical lens 116 in the second positioning device 104, and then uses vacuum adsorption or electrostatic adsorption to adsorb on the optical surface of the optical lens 116. In addition, the second positioning device 104 can also reduce or remove the force that fixes the optical lens 116, so that the assembly device 108 can smoothly absorb the optical lens 116.

[0086] The assembly device 108 is at least in the optical axis direction of the optical lens 116 (for example, Figure 4 For example, the assembly device 108 can be deformed in the optical axis direction of the optical lens 116, or the assembly device 108 can be displaced in the optical axis direction of the optical lens 116 and drive the adsorbed optical lens 116 to displace.

[0087] In some embodiments, the assembly device 108 can provide a degree of freedom in the direction of the optical axis O of the optical lens 1 116 through a structure such as an elastic member or a damping track. The elastic member can include one or more of a spring, an air bag, a rubber ring, etc. In different embodiments, the elastic member includes an elastic member 1, an elastic member 2, and an elastic member 3.

[0088] The driving device 110 can drive the assembly device 108 to move, so that the assembly device 108 drives the optical lens 116 to be assembled with the lens barrel 114 along the optical axis O direction of the optical lens 116. For example, the driving device 110 includes a motor. The driving device 110 can drive the assembly device 108 to rotate, translate or telescope, so that the assembly device 108 absorbs the optical lens 116 from the second positioning device 104. The driving device 110 can also drive the assembly device 108 to drive the optical lens 116 to move to a position close to the lens barrel 114, and assemble the optical lens 116 in the lens barrel 114 along the optical axis direction of the optical lens 116.

[0089] During the assembly of the optical lens 116, the risk of damage to the optical lens 116 may occur during the process of assembling the optical lens 116 at the installation position in the lens barrel 114. For example, the lens barrel 114 or the optical lens 116 has a processing error, or the assembly device 108 controls the lens barrel 114 and the optical lens 116 to approach each other with poor accuracy, resulting in excessive pressure or shear force between the lens barrel 114 and the optical lens 116, which can easily damage the optical lens 116. In particular, at the edge of the optical lens 116, or at a location where the thickness is relatively thin, the structural strength is relatively poor and the force that can be withstood is relatively small.

[0090] In some embodiments, the optical lens 116 is adsorbed by the assembly device 108 and then assembled in the lens barrel 114. The assembly device 108 has a degree of freedom in the direction of the optical axis O of the optical lens 116. In the process of the assembly device 108 driving the optical lens 116 to be installed in the lens barrel 114 along the direction of the optical axis O, the assembly device 108 can make the force acting on the optical lens 116 change slowly, reduce the probability or time of generating an excessively large force peak on the optical lens 116, and protect the optical lens 116. In addition, the degree of freedom of the assembly device 108 in the direction of the optical axis O of the optical lens 116 can also absorb certain processing errors and slight mechanical vibrations.

[0091] In some embodiments, the image of the optical lens 116 acquired by the visual acquisition device 106 can be used to accurately position the optical lens 116, which is beneficial to improving the positioning accuracy of the optical lens 116 in the second positioning device 104 and the assembly accuracy of the optical lens 116 in the lens barrel 114.

[0092] Figure 2 FIG. 1 is a schematic diagram showing a structure of an exemplary first positioning device consistent with some embodiments of the present disclosure. Figure 2 The first positioning device 202 may be Figure 1The first positioning device 102 is shown in FIG. The first positioning device 202 includes a first positioning groove 222 and a first fixing member 224, and the first positioning groove 222 and the first fixing member 224 can move relative to each other. The shape of the first positioning groove 222 matches the shape of the lens barrel 214. For example, the lens barrel 214 can be Figure 1 The lens barrel 1 114 shown in FIG. The lens barrel 214 can be placed in the first positioning groove 222, and the first positioning groove 222 can limit the movement of the lens barrel 214 in at least one direction. The first positioning groove 222 cooperates with the first fixing member 224 to position the lens barrel 214.

[0093] In some embodiments, please refer to Figure 2 The second lens barrel 214 is roughly rectangular in shape, with an arc-shaped notch in the center for mounting optical lenses. The inner surface of the first positioning groove 222 and the outer surface of the second lens barrel 214 are close to or fit each other, and the first positioning groove 222 can be processed into a frame shape with one side open.

[0094] In some embodiments, the inner surface of the first positioning groove 222 at least partially corresponds to the outer surface of the second lens barrel 214. For example, the first positioning groove 222 has a notch or hollow on some sides, and the remaining sides can fit with the outer surface of the second lens barrel 214 and provide support.

[0095] In some embodiments, the first fixing member 224 is movable relative to the first positioning groove 222. When the first fixing member 224 is close to the first positioning groove 222, the first fixing member 224 can be pressed against the side of the lens barrel 214. The interaction force between the first positioning groove 222 and the first fixing member 224 can clamp the lens barrel 214 in the first positioning groove 222, thereby positioning and fixing the lens barrel 214.

[0096] The first fixing member 224 can be driven by a motor or a hydraulic cylinder, or can be manually operated by a staff member, and the first fixing member 224 can be controlled to move closer to or farther from the first positioning groove 222 through a lever structure, a screw structure, etc.

[0097] In some embodiments, the first positioning device 202 can use other structures to fix the lens barrel 214. For example, the first positioning device 202 includes a hoop structure, which applies pressure to the side of the lens barrel 214 to keep the position and posture of the lens barrel 214 fixed. For example, the lens barrel 214 is provided with a threaded hole, and the first positioning device 202 is also provided with a threaded hole at a corresponding position. The threaded hole can be used to combine with a bolt to fix the position and posture of the lens barrel 214.

[0098] Figure 3 FIG. 1 is a schematic diagram showing a structure of an exemplary second positioning device consistent with some embodiments of the present disclosure. Figure 3 The second positioning device 304 may be Figure 1 The second positioning device 104 is shown. The second positioning device 304 includes a second positioning groove 322 and a second fixing member 324. The shape of the second positioning groove 322 matches the shape of the optical lens 316. The optical lens 316 can be Figure 1 The second fixing member 324 is movable relative to the second positioning groove 322, can move toward the second positioning groove 322, and cooperate with the second positioning groove 322 to fix the optical lens 316 in the second positioning groove 322.

[0099] In some embodiments, the shape of the optical lens 2 316 is roughly a semicircular sheet, and the inner surface of the second positioning groove 322 is partially fitted with the outer periphery of the optical lens 2 316. The side of the second positioning groove 322 close to the second fixing member 324 is open, so that the second fixing member 324 can be against the outer periphery of the optical lens 2 316. The side of the second fixing member 324 close to the second positioning groove 322 can be processed into an arc shape close to the outer periphery of the optical lens 2 316. When the second fixing member 324 moves toward the second positioning groove 322, the contact area between the second fixing member 324 and the outer periphery of the optical lens 2 316 is increased, which can reduce the pressure of the second fixing member 324 on the optical lens 2 316, thereby protecting the optical lens 2 316.

[0100] In some embodiments, the inner surface of the second positioning groove 322 and the second fixing member 324 has a flexible structure. When the second fixing member 324 is close to the second positioning groove 322, the flexible structure is pressed against the outer periphery of the second optical lens 316 to reduce the probability of stress concentration in the outer peripheral area of ​​the second optical lens 316. The flexible structure can provide a smaller deformation range, and has a relatively small impact on the positioning accuracy of the second optical lens 316.

[0101] In some embodiments, the second fixing member 324 can be driven by a motor or a hydraulic cylinder. A pressure sensor is provided on the second positioning groove 322 or the second fixing member 324 to prevent excessive pressure from being applied to the second optical lens 316, thereby preventing the second optical lens 316 from being damaged.

[0102] In some embodiments, the second positioning device 304 may use other methods to fix the second optical lens 316. For example, the second positioning device 304 includes a groove that matches the shape of the second optical lens 316. The second optical lens 316 may be placed in the groove, and a vacuum adsorption device is provided on the bottom surface of the groove to fix the second optical lens 316 in the second positioning device 304.

[0103] In some embodiments, the second positioning device 304 further includes a first detector ( Figure 3 ). The first detector can detect whether the optical lens 2 316 is in the second positioning groove 322. For example, the first detector includes a pressure sensor. When the optical lens 2 316 is placed in the second positioning groove 322, the optical lens 2 316 generates pressure on the pressure sensor. The pressure sensor can output a corresponding pressure signal. For example, the first detector includes a vacuum detector. The vacuum detector can continuously extract air for a period of time. When the optical lens 2 316 is placed in the second positioning groove 322, the air extraction hole of the vacuum detector is blocked, which can be used to determine whether the optical lens 2 316 is placed in the second positioning groove 322. In addition, the vacuum detector can also adsorb the optical lens 2 316 to fix the optical lens 2 316.

[0104] In some embodiments, the first detector can be used to detect the positive and negative directions of the optical lens 2 316 in the second positioning groove 322. During the assembly process, the optical lens 2 316 can be fixed in the second positioning groove 322 in a preset direction. For example, the optical lens 2 316 has an anti-fool structure (such as a protrusion, a groove or a notch, etc.) for distinguishing the positive and negative directions at a position close to the periphery. The first detector includes a pressure sensor corresponding to the position of the protrusion or groove in the optical lens 2 316, and the positive and negative directions of the optical lens 2 316 in the second positioning groove 322 are determined by the data output by the pressure sensor. Alternatively, the first detector includes a vacuum detector. When the optical lens 2 316 is placed in the second positioning groove 322 in different positive and negative directions, the notch blocks the vacuum detector or exposes the vacuum detector, and the vacuum detector can determine the positive and negative directions of the optical lens 2 316.

[0105] When the first detector determines that the forward and reverse directions of the optical lens 2 316 in the second positioning groove 322 meet the preset direction, the assembly can continue so that the optical lens 2 316 is assembled in the lens barrel according to the preset direction; alternatively, when the first detector determines that the forward and reverse directions of the optical lens 2 316 in the second positioning groove 322 do not meet the preset direction, the position or angle of the optical lens 2 316 can be adjusted so that the forward and reverse directions of the optical lens 2 316 in the second positioning groove 322 meet the preset direction, thereby allowing the optical lens 2 316 to be assembled in the lens barrel according to the preset direction.

[0106] In some embodiments, the first detector includes an optical detector, such as a structured light detector and a camera. The first detector can perform structured light detection on the surface of the optical lens 2 316 to obtain the surface shape of the optical lens 2 316 to determine the positive and negative directions of the optical lens 2 316 in the second positioning groove 322. In some implementations, the first detector can be implemented by a visual acquisition device. For example, the visual acquisition device includes a structured light detector, which can project line structured light stripes onto the surface of the optical lens 2 316. After the image of the optical lens 2 316 is acquired by the camera, the concave-convex shape or curvature of the optical surface of the optical lens 2 316 can be determined according to the degree of deformation of the line structured light, and compared with the design shape of the optical lens 2 316 to determine the positive and negative directions of the optical lens 2 316.

[0107] Figure 4 A schematic diagram of an exemplary visual acquisition device consistent with some embodiments of the present disclosure is shown. Figure 4 , the second visual acquisition device 406 may be Figure 1 The visual acquisition device 106 shown in FIG. 406 includes a first camera 422, and the first camera 422 can obtain a first image of the optical lens 3 416 in the first direction. For example, the optical lens 3 416 can be Figure 1 The optical lens shown in 116 or Figure 3 The optical lens 2 316 shown in FIG. 4 is a perspective view of an optical lens 3 416. The first direction is parallel to the optical axis O of the optical lens 3 416. For example, the optical axis O of the optical lens 3 416 is along the vertical direction, and the first direction is the vertical direction. The first camera 422 can obtain a first image of the optical lens 3 416 on one side in the vertical direction. For example, the first camera 422 obtains the first image of the optical lens 3 416 from top to bottom.

[0108] During the process of assembling the optical lens three 416 in the lens barrel, the assembly device drives the optical lens three 416 to move, and the visual acquisition device two 406 is movably arranged so that the first camera 422 acquires the first image of the optical lens three 416 in the first direction. In some embodiments, when the optical lens three 416 is located in the second positioning device, the first camera 422 moves to the top of the second positioning device to acquire the first image of the optical lens three 416. The first camera 422 can be driven to move by a motor, or it can be manually controlled to move.

[0109] In some embodiments, after the first camera 422 acquires the first image of the optical lens three 416 in the first direction, the optical lens three 416 is positioned according to the first image. For example, when the optical lens three 416 is in the second positioning device, the first image of the optical lens three 416 is acquired by the first camera 422. The first image is compared with the standard position image of the optical lens three 416 in the second positioning device, or the optical lens three 416 is coordinateized according to the first image to obtain the deviation between the optical lens three 416 and the standard position. The second positioning device can be used to adjust at least one of the position or posture of the optical lens three 416. For example, the second positioning device can translate or rotate while holding the optical lens three 416 to drive the optical lens three 416 to move.

[0110] In some embodiments, the optical lens 3 416 is in the second positioning device. After obtaining the deviation between the optical lens 3 416 and the standard position according to the first image, the driving device drives the assembly device to absorb the optical lens 3 416 from the second positioning device. The assembly device adjusts at least one of the position or posture of the optical lens 3 416.

[0111] In some embodiments, during the process of the assembly device driving the optical lens three 416 to be assembled in the lens barrel, the driving device can drive the assembly device to adjust at least one of the position or posture of the optical lens three 416. For example, after the assembly device absorbs the optical lens three 416 from the second positioning device, it moves to the position of the first positioning device and places the optical lens three 416 in the lens barrel. The first image of the optical lens three 416 is obtained by the first camera 422, and the deviation between the preset assembly positions of the optical lens three 416 in the lens barrel is determined according to the first image. After the driving device drives the assembly device to adjust at least one of the position or posture of the optical lens three 416, the optical lens three 416 and the lens barrel are assembled in place.

[0112] In some embodiments, the second positioning device and the driving device can jointly adjust at least one of the position or posture of the optical lens three 416.

[0113] In some embodiments, the first image is processed by a processor. For example, the processor communicates with the second visual acquisition device 406, and the processor also communicates with the second positioning device or the driving device. The processor obtains the first image from the second visual acquisition device 406, and controls the second positioning device or the driving device according to the control instructions corresponding to the first image output, and adjusts at least one of the position or posture of the optical lens three 416. The processor can be integrated in the assembly device, for example, integrated in the second visual acquisition device 406, the driving device or the assembly device. The processor can also be independently set relative to the assembly device, for example, the processor is integrated in an industrial computer, and the assembly device is controlled by the industrial computer.

[0114] In some embodiments, the second visual acquisition device 406 further includes a second camera 424. The second camera 424 can obtain a second image of the optical lens 3 416 in a second direction. The second direction is parallel to the optical axis O direction of the optical lens 3 416, and the second direction is opposite to the first direction. For example, please refer to Figure 4 , the optical axis O of the optical lens 3 416 is along the vertical direction, and the first direction and the second direction are both vertical directions. Among them, the first direction is from top to bottom, and the second direction is from bottom to top.

[0115] In some embodiments, when the assembly device absorbs the optical lens three 416, the position of the assembly device and the position of the visual acquisition device two 406 may interfere, and the assembly device may block the visual range of the first camera 422. After the assembly device absorbs the optical lens three 416 from the second positioning device, the second camera 424 is used to obtain a second image of the optical lens three 416 from a second direction opposite to the first direction. The optical lens three 416 can be positioned according to the second image, and the assembly device can be driven by the driving device according to the second image to adjust at least one of the position or posture of the optical lens three 416.

[0116] In some embodiments, the second positioning device passes through along the optical axis O direction of the optical lens three 416. When the optical lens three 416 is fixed in the second positioning device, the second image of the optical lens three 416 can be acquired from the second direction by using the second camera 424. At least one of the position or posture of the optical lens three 416 can be adjusted according to the second image by using at least one of the second positioning device or the driving device.

[0117] In some embodiments, the first camera 422 may acquire a first image, and the second camera 424 may acquire a second image. The posture deviation of the optical lens three 416 is acquired according to the first image and the second image, and the posture of the optical lens three 416 is adjusted using at least one of the second positioning device or the driving device.

[0118] In some embodiments, the first image and the second image are both processed by a processor. The processor obtains the first image and the second image through the second visual acquisition device 406, and outputs corresponding control instructions according to the first image and the second image to control the second positioning device or the driving device to adjust at least one of the position or posture of the optical lens 3 416.

[0119] Figure 5 Schematic diagram of an exemplary assembly device consistent with some embodiments of the present disclosure is shown. Figure 5 , wherein the assembly device 508 may be Figure 1 The assembly device 108 is shown in FIG. Figure 6A schematic diagram showing an exemplary first structural layer and a second structural layer being separated, consistent with some embodiments of the present disclosure. Figure 7 A schematic diagram showing an exemplary first structural layer and a second structural layer in proximity consistent with some embodiments of the present disclosure is shown. Figure 5 The assembly device 2 508 includes at least two elastic members 1 522. The elastic member 1 522 can be elastically deformed in the direction of the optical axis O of the optical lens. The elastic member 1 522 can be a coil spring, an air spring, a rubber spring, a hydraulic spring, etc.

[0120] During the assembly process of the lens barrel and the optical lens, a certain pressure needs to be applied to the optical lens so that the optical lens is assembled at the installation position on the lens barrel. When the second assembly device 508 drives the optical lens along the optical axis O direction and is assembled in the lens barrel, the optical lens is subjected to pressure in opposite directions applied by the second assembly device 508 and the lens barrel. When the two pressures are not in the same line, a shear force is formed, which can easily cause damage to the optical lens. When the second assembly device 508 drives the optical lens to be assembled in the lens barrel, the pressure or shear force on the optical lens is parallel to the direction of the optical axis O. When the optical lens is subjected to a force parallel to the direction of the optical axis O, the elastic member 1 522 undergoes elastic deformation, so that the force on the optical lens is slowly increased, so as to reduce the probability of an instantaneous force peak and protect the optical lens.

[0121] In some embodiments, the elastic member 1 522 can be elastically deformed in directions other than the optical axis O. For example, a coil spring can be stretched or compressed along the axial direction, or deviate from the axial direction to be elastically deformed at a certain angle. The elastic member 1 522 can allow the assembly device 2 508 to have degrees of freedom in other directions, and protect the optical lens when the optical lens is subjected to forces in other directions.

[0122] At least two elastic members 522 in the second assembly device 508 are not on the same straight line, where the same straight line refers to a straight line in the direction of the optical axis O of the optical lens. For example, Figure 5 The assembly device 2 508 includes four elastic members 1 522, which are parallelly distributed at four positions in the same plane. The deformation amounts of the four elastic members 1 522 when elastically deformed are independent of each other. When the force applied to the optical lens deviates from the optical axis O of the optical lens, the deformation amounts of the four elastic members 1 522 are different, and the optical lens adsorbed on the assembly device 2 508 can be tilted at a certain angle.

[0123] In some embodiments, the second assembly device 508 further includes a stopper 524. The stopper 524 can limit the elastic deformation of the elastic member 1 522. In some embodiments, the elastic deformation of the elastic member 1 522 is not greater than 0.5 mm, for example, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, or 0.5 mm. By limiting the deformation of the elastic member 1 522 by the stopper 524, it is prevented that the deformation of the elastic member 1 522 is too large, resulting in a large offset of at least one of the position or posture of the optical lens, which affects the assembly accuracy of the lens.

[0124] In some embodiments, the stopper 524 includes a push rod arranged parallel to the optical axis O of the optical lens and a baffle 530 corresponding to the push rod. When the elastic member 1 522 is compressed along the optical axis O of the optical lens, the distance between the push rod and the baffle is close. When the push rod and the baffle 530 abut against each other, the elastic member 1 522 cannot be further compressed. The maximum deformation of the elastic member 1 522 can be the distance between the push rod and the baffle 530.

[0125] In some embodiments, the limiting member 524 may be other structures. For example, the elastic member 522 includes a coil spring, and the limiting member 524 includes a washer sleeved on the outer periphery of the coil spring, and the height of the washer is used to limit the deformation of the coil spring.

[0126] In some embodiments, the second assembly device 508 further includes a sensor 526. The sensor 526 can obtain the elastic force of the first elastic member 522, or obtain the elastic deformation of the first elastic member 522, so as to detect the force exerted by the second assembly device 508 and the lens barrel on the optical lens.

[0127] During the assembly process of the lens barrel and the optical lens, the force acting on the optical lens mainly includes the extrusion caused by the relative movement of the lens barrel and the second assembly device 508. The elastic force of the elastic member 522 or the elastic deformation of the elastic member 522 can represent the force acting on the optical lens to a certain extent. The force acting on the optical lens can be detected by obtaining the elastic force of the elastic member 522 or the elastic deformation of the elastic member 522 using the sensor 526. When the force acting on the optical lens exceeds the threshold, the second assembly device 508 and the driving device are controlled to stop to reduce the probability of damaging the optical lens.

[0128] In some embodiments, the sensor 526 includes a pressure sensor. The pressure sensor is disposed on the baffle, and the position of the pressure sensor corresponds to the position of the stopper 524. When the push rod abuts against the baffle 530 and continues to approach the baffle, the pressure sensor can detect the pressure of the push rod on the pressure sensor. According to the detection result of the pressure sensor, it can be converted into the elastic force of the elastic member 1 522, or the elastic deformation of the elastic member 1 522.

[0129] In some embodiments, the sensor 526 includes a position sensor. For example, when the elastic member 1 522 undergoes elastic deformation, the position sensor can detect the change in distance between the two ends of the elastic member 1 522. For another example, the sensor 526 can match the type of the elastic member 1 522. For example, the elastic member 1 522 is an air spring or a hydraulic spring, and the sensor 526 includes an air pressure sensor or a hydraulic pressure sensor.

[0130] In some embodiments, the second assembly device 508 further includes an adsorption structure 528. The adsorption structure 528 can adsorb the optical lens. The adsorption structure 528 can include a press-type suction cup, or a suction cup connected to an air pump, which can be adsorbed on the optical surface of the optical lens. The adsorption structure 528 is made of a flexible material and protects the optical surface of the optical lens to reduce the probability of scratching the optical lens.

[0131] In some embodiments, the adsorption structure 528 may include an electrostatic chuck, which can precisely control the adsorption force by adjusting the voltage, and can be used to adsorb optical lenses made of glass or plastic, and is suitable for adsorbing light-weight and small-sized optical lenses.

[0132] In some embodiments, the second assembly device 508 has a degree of freedom in a plane perpendicular to the optical axis O of the optical lens. For example, the optical axis O of the optical lens is a vertical direction, and the second assembly device 508 has a degree of freedom to translate in a horizontal plane (a plane perpendicular to the vertical direction).

[0133] For example, see Figure 6 and Figure 7, the assembly device also includes a first structural layer and a second structural layer. In different embodiments, the first structural layer includes a first structural layer one and a first structural layer two; the second structural layer includes a second structural layer one and a second structural layer two. The first structural layer one 632 (or the first structural layer two 732) and the second structural layer one 634 (or the second structural layer two 734) are arranged in parallel along the optical axis O direction of the optical lens. The optical axis O of the optical lens is along the vertical direction, and the first structural layer one 632 (or the first structural layer two 732) and the second structural layer one 634 (or the second structural layer two 734) are parallel to each other in the vertical direction and are arranged horizontally. The first structural layer one 632 (or the first structural layer two 732) and the second structural layer one 634 (or the second structural layer two 734) can move relative to each other. For example, the first structural layer one 632 (or the first structural layer two 732) can translate in a horizontal plane, and the first structural layer one 632 (or the first structural layer two 732) is connected to the adsorption structure. When the first structural layer 1 632 (or the first structural layer 2 732) translates in the horizontal plane, the optical lens is driven to translate in the horizontal plane, so that the position of the optical lens in the horizontal plane can be adjusted, which has higher flexibility.

[0134] In some embodiments, the first structural layer 1 632 (or the first structural layer 2 732) and the second structural layer 1 634 (or the second structural layer 2 734) can cooperate with the elastic member 2 622 (or the elastic member 3 722). Figure 6 and Figure 7 , the elastic member 2 622 (or the elastic member 3 722) includes a coil spring. The first end of the elastic member 2 622 (or the elastic member 3 722) abuts against the first structural layer 1 632 (or the first structural layer 2 732), and the second end of the elastic member 2 622 (or the elastic member 3 722) abuts against the second structural layer 1 634 (or the second structural layer 2 734). In some embodiments, a blind hole may be provided on the first structural layer 1 632 (or the first structural layer 2 732) and the second structural layer 1 634 (or the second structural layer 2 734), and the first end and the second end of the elastic member 2 622 (or the elastic member 3 722) abut against the blind hole respectively, so as to reduce the probability of the elastic member 2 622 (or the elastic member 3 722) detaching from the first structural layer 1 632 (or the first structural layer 2 732) and the second structural layer 1 634 (or the second structural layer 2 734). The coil spring can tilt in a non-axial direction. When relative sliding occurs between the first structural layer 1 632 (or the first structural layer 2 732) and the second structural layer 1 634 (or the second structural layer 2 734) in a horizontal plane, the coil spring tilts.

[0135] The first structural layer is provided with a connector, and in different embodiments, the connector includes a connector 1 and a connector 2. The second structural layer is provided with a matching portion, and in different embodiments, the matching portion includes a matching portion 1 and a matching portion 2. The connector 1 636 (or the connector 2 736) is embedded in the matching portion 1 638 (or the matching portion 2 738), and the connector 1 636 (or the connector 2 736) is movable in the matching portion 1 638 (or the matching portion 2 738), for example, there is a gap between the connector 1 636 (or the connector 2 736) and the matching portion 1 638 (or the matching portion 2 738). The connector 1 636 (or the connector 2 736) can provide the assembly device with a degree of freedom in a plane perpendicular to the optical axis O direction of the optical lens.

[0136] When the first structure layer 1 632 (or the first structure layer 2 732) translates in the horizontal plane relative to the second structure layer 1 634 (or the second structure layer 2 734), the connector 1 636 (or the connector 2 736) moves in the matching portion 1 638 (or the matching portion 2 738). The range of movement of the connector 1 636 (or the connector 2 736) in the matching portion 1 638 (or the matching portion 2 738) can limit the range of translation of the first structure layer 1 632 (or the first structure layer 2 732) relative to the second structure layer 1 634 (or the second structure layer 2 734) in the horizontal plane.

[0137] For example, see Figure 6 and Figure 7 .exist Figure 6 In the structure where the first structure layer 632 is not translated relative to the second structure layer 634, the first structure layer 632 and the second structure layer 634 are aligned. At this time, the assembly device and the lens barrel do not exert force on the optical lens. Figure 7 In the structure when the first structure layer 2 732 is translated relative to the second structure layer 2 734 in the horizontal plane, the first structure layer 2 732 and the second structure layer 2 734 are displaced in the vertical direction. At this time, the elastic member 3 722 is compressed, the first structure layer 2 732 and the second structure layer 2 734 are close to each other, and the assembly device drives the optical lens to realize the vertical direction (for example, Figure 3 and Figure 4 The assembly device provides three-axis freedom, including displacement in the optical axis (direction O) and horizontal plane.

[0138] In some embodiments, the first structural layer 1 632 (or the first structural layer 2 732) and the second structural layer 1 634 (or the second structural layer 2 734) cooperate with the elastic member 2 622 (or the elastic member 3 722), which is conducive to simplifying the structure of the assembly device. By utilizing the feature that the spiral spring can be non-axially tilted, the first structural layer 1 632 (or the first structural layer 2 732) and the second structural layer 1 634 (or the second structural layer 2 734) can move relative to each other in the horizontal plane. At the same time, the first structural layer 1 632 (or the first structural layer 2 732) and the second structural layer 1 634 (or the second structural layer 2 734) can play a limiting role. When the first structural layer 1 632 (or the first structural layer 2 732) and the second structural layer 1 634 (or the second structural layer 2 734) are in contact, the compression amount of the elastic member 2 622 (or the elastic member 3 722) reaches the maximum value.

[0139] Among them, at least two elastic members 2 622 (or elastic members 3 722) are arranged between the first structural layer 1 632 (or the first structural layer 2 732) and the second structural layer 1 634 (or the second structural layer 2 734), and at least two elastic members 2 622 (or elastic members 3 722) are not parallel. When the elastic deformation amounts of at least two elastic members 2 622 (or elastic members 3 722) are different, the first structural layer 1 632 (or the first structural layer 2 732) and the second structural layer 1 634 (or the second structural layer 2 734) can be relatively tilted, so that the assembly device has a certain degree of angular freedom.

[0140] In some embodiments, the matching portion has an inclined surface. In different embodiments, the inclined surface includes inclined surface 1 and inclined surface 2. When the first structural layer 1 632 (or the first structural layer 2 732) and the second structural layer 1 634 (or the second structural layer 2 734) are separated, inclined surface 1 640 (or inclined surface 2 740) can guide the connector 1 636 (or the connector 2 736) to reset. When the first structural layer 1 632 (or the first structural layer 2 732) and the second structural layer 1 634 (or the second structural layer 2 734) are separated, for example, after the optical lens is assembled in the lens barrel, the assembly device such as Figure 7 The status shown is Figure 6 During the state transition shown, the elastic member 2 622 (or the elastic member 3 722) releases its elastic deformation. Under the action of the elastic force, the first structural layer 1 632 (or the first structural layer 2 732) and the second structural layer 1 634 (or the second structural layer 2 734) move away from each other. At the same time, the inclined plane 1 640 (or the inclined plane 2 740) guides the connecting member 1 636 (or the connecting member 2 736) to reset, so that the first structural layer 1 632 (or the first structural layer 2 732) and the second structural layer 1 634 (or the second structural layer 2 734) are aligned in the vertical direction.

[0141] In some embodiments, the elastic member 2 622 (or the elastic member 3 722) can be separated from the first structural layer 1 632 (or the first structural layer 2 732) and the second structural layer 1 634 (or the second structural layer 2 734). This is to avoid the mutual influence between the degrees of freedom parallel to the optical axis O and the degrees of freedom in the plane perpendicular to the optical axis O when assembling the optical lens, thereby reducing the maximum allowable value of the degrees of freedom in different directions.

[0142] In some embodiments, the assembly device further comprises a tablet fixing device. In different embodiments, the tablet fixing device comprises a tablet fixing device 1 and a tablet fixing device 2; the tablet comprises a tablet 1 and a tablet 2. Figure 8 A schematic diagram of an exemplary tablet fixing device consistent with some embodiments of the present disclosure is shown. Figure 8 The second tablet fixing device 812 can be Figure 1 The pressing piece fixing device 112 shown in FIG. The pressing piece fixing device 2 812 and the pressing piece 2 818 can be used in conjunction with each other. For example, the pressing piece 2 818 can be Figure 1 The pressing piece 1 118 shown in FIG. The pressing piece 2 818 can be used to fix the optical lens in the lens barrel. After the optical lens is assembled in the lens barrel, in order to prevent the optical lens from falling off or shifting due to deformation or vibration, the pressing piece 2 818 is used to fix the optical lens in the lens barrel. For example, the pressing piece 2 818 is fixedly connected to the lens barrel, and the edge of the pressing piece 2 818 overlaps the edge of the optical lens, so that the optical lens and the lens barrel remain fixed.

[0143] The second pressing piece fixing device 812 can fix the second pressing piece 818 and can also be flipped relative to the first positioning device. After the assembling device assembles the optical lens in the lens barrel, the second pressing piece fixing device 812 is flipped onto the first positioning device so that the second pressing piece 818 fixed in the second pressing piece fixing device 812 is pressed on the lens barrel and the optical lens.

[0144] In some embodiments, Figure 8 As shown, a through hole is provided on the second pressing piece 818. The second pressing piece 818 can be fixedly connected to the lens barrel at the position of the through hole. A positioning pin is provided at the corresponding position of the second pressing piece fixing device 812, and the positioning pin can position the second pressing piece 818 so that when the second pressing piece fixing device 812 is turned over to the first positioning device, the position of the second pressing piece 818 corresponds to the lens barrel.

[0145] In some embodiments, the second pressing piece fixing device 812 is provided with a through hole, which corresponds to the position of the through hole provided on the second pressing piece 818. The second pressing piece 818 can be fixed to the second pressing piece fixing device 812 by bolts. When the second pressing piece fixing device 812 is controlled to flip onto the first positioning device, the bolts can be installed between the second pressing piece 818 and the lens barrel, which can simplify the assembly process while achieving accurate positioning. In some embodiments, the second pressing piece 818 can also be fixedly connected to the lens barrel by bonding, hot melting, welding, riveting, etc.

[0146] In some embodiments, the second tablet fixing device 812 includes a second detector ( Figure 8 ). The second detector can detect whether the second pressing piece 818 is located in the second pressing piece fixing device 812. For example, the second detector includes a vacuum detector. When the second pressing piece 818 is located in the second pressing piece fixing device 812, the second pressing piece 818 blocks the air inlet of the vacuum detector. According to the output signal of the vacuum detector, it can be detected whether the second pressing piece 818 exists, and the vacuum detector can also fix the second pressing piece 818. For example, the exhaust hole of the vacuum detector can continue to exhaust air for a period of time to form a negative pressure. If the second pressing piece 818 blocks the exhaust hole of the vacuum detector or exposes the exhaust hole of the vacuum detector, the output signal of the vacuum detector is different. According to the output signal of the vacuum detector, it can be determined whether the second pressing piece 818 exists.

[0147] The present disclosure also provides some lens barrel assembly methods. Fig. 9 A schematic diagram of an exemplary first lens assembly method consistent with some embodiments of the present disclosure is shown. Fig. 9 The first lens assembly method includes a lens assembly method 900. The lens assembly method 900 can be performed by an assembly device, for example, with Figures 1 to 8 The lens assembly method 900 includes 902 to 908. In some embodiments, the first lens assembly method may include more or fewer steps, and the order of the steps in the first lens assembly method is not limited. In step 902, the lens barrel and the optical lens are fixed. Wherein, the lens barrel and the optical lens are fixed at different positions, and the lens barrel and the optical lens can be adjusted in position with the installation posture of the optical lens in the lens barrel. For example, the optical axis of the optical lens is fixed in the lens barrel in the vertical direction, and when the lens barrel and the optical lens are fixed, the lens barrel and the optical lens both maintain a vertically placed posture. In the implementation process, the placement position and direction of the lens barrel and the optical lens can have a certain redundancy. In addition, the device for fixing the lens barrel and the optical lens can adjust at least one of the position or posture of the lens barrel and the optical lens, which is conducive to improving the accuracy of lens assembly.

[0148] In step 904, the posture of the optical lens in a first direction is determined. The first direction is parallel to the direction of the optical axis of the optical lens. For example, after the optical lens is fixed in step 902, the optical axis of the optical lens is along the vertical direction. For example, the first direction may be from top to bottom along the vertical direction. In some possible embodiments, the optical lens is fixed in an assembly device, and a first image of the optical lens can be captured by a visual acquisition device. For example, the visual acquisition device is moved directly above the optical lens, and the posture of the optical lens is determined based on the first image. The posture of the optical lens in the first direction includes at least one of the position or posture of the optical lens. For example, the visual acquisition device includes a depth camera, and the distance between the optical lens and the depth camera in the first direction can be determined based on the first image acquired by the depth camera.

[0149] In step 906, the optical lens is sucked. For example, a vacuum chuck or an electrostatic chuck is used to adsorb on the optical surface of the optical lens. After the optical lens is released, the vacuum chuck or the electrostatic chuck can drive the optical lens to move and be assembled in the lens barrel.

[0150] In step 908, the lens barrel and the optical lens are assembled along a first direction. The first direction is parallel to the optical axis direction of the optical lens. For example, the first direction is from top to bottom along the vertical direction. After the optical lens is sucked, the optical lens is driven to be assembled in the lens barrel along the direction from top to bottom.

[0151] During the process of assembling the optical lens in the lens barrel, the optical lens can float along the optical axis. Floating means that the distance the optical lens moves along the optical axis and the preset distance of controlling the movement of the optical lens can produce a certain degree of freedom. For example, when assembling the optical lens in the lens barrel, the preset control optical lens moves 10 mm along the first direction. In the actual assembly process, the distance the optical lens moves is 9.5 mm, and the optical lens floats 0.5 mm along the optical axis. The allowable value of the optical lens floating can be determined according to the processing accuracy of the lens, and does not affect the lens to meet the use requirements.

[0152] Fig.10 A schematic diagram of an exemplary second lens assembly method consistent with some embodiments of the present disclosure is shown. Fig.10 , the second lens assembly method includes lens assembly method 1000. Lens assembly method 1000 includes 1002 to 1012. Among them, steps 1002, 1004 and 1012 can refer to steps 902, 904 and 908 in lens assembly method 900, and will not be repeated. In some embodiments, the second lens assembly method may include more or fewer steps, and the order of the steps in the second lens assembly method is not limited.

[0153] In some embodiments, sucking the optical lens includes taking out the optical lens and determining the position of the optical lens in the second direction. In step 1006, the optical lens is taken out. In step 1002, the optical lens remains fixed. Wherein, the fixed optical lens device, for example, includes an opening facing the first direction, and a first image of the optical lens can be obtained from the first direction. In this step, the optical lens is taken out to facilitate obtaining the position of the optical lens in the second direction. Wherein the second direction is opposite to the first direction.

[0154] In step 1008, the position of the optical lens in a second direction is determined. The second direction is parallel to the optical axis direction of the optical lens and opposite to the first direction. For example, if the optical axis direction of the optical lens is a vertical direction, the first direction is from top to bottom along the vertical direction, and the second direction is from bottom to top along the vertical direction.

[0155] In some embodiments, the upper surface of the optical lens is adsorbed and the optical lens is taken out upward. The visual acquisition device can move to the bottom of the optical lens to obtain a second image of the optical lens in a second direction (from bottom to top).

[0156] In step 1010, the position and posture of the optical lens are adjusted according to the first image of the optical lens in the first direction and the second image of the optical lens in the second direction. The deviation between the optical lens and the standard position and posture (for example, the position and posture when placed horizontally) can be determined through the first image and the second image. At least one of the position or posture of the optical lens is adjusted. In step 1012, the adjusted optical lens is assembled in the lens barrel along the first direction, which can improve the assembly accuracy of the lens.

[0157] In some embodiments, it is also possible to identify whether the front and back directions of the optical lens are correct based on the first image and the second image. For example, the curvatures of two opposite optical surfaces of the optical lens are different. Based on the first image and the second image, the curvatures of the optical surfaces in the corresponding directions of the optical lens can be identified, thereby determining whether the front and back directions of the optical lens are correct.

[0158] Fig.11 A schematic diagram of an exemplary third lens assembly method consistent with some embodiments of the present disclosure is shown. Fig.11 The third lens assembly method includes a lens assembly method 1100. The lens assembly method 1100 includes steps 1102 to 1112. Steps 1102, 1104, and 1110 may refer to steps 902, 904, and 908 in the lens assembly method 900, and will not be described in detail.

[0159] In step 1106, the optical lens is sucked and placed on the lens barrel. In some embodiments, no pressure may be applied to the optical lens first, and no effective connection is formed between the optical lens and the lens barrel, so as to adjust at least one of the position or posture of the optical lens.

[0160] In step 1108, the position and posture of the optical lens in the first direction are determined, and the position and posture of the optical lens are adjusted. After the optical lens is placed on the lens barrel, the position and posture of the optical lens in the first direction can be obtained by using a visual acquisition device, for example, an image of the optical lens is taken from top to bottom by using a visual acquisition device. After the image of the optical lens on the lens barrel is obtained, the image is processed. The deviation between the actual position and posture of the optical lens and the preset installation position and posture of the optical lens in the lens barrel can be determined based on the image. At least one of the position or posture of the optical lens is adjusted according to the deviation. Among them, a vacuum suction cup or an electrostatic suction cup can be used to suck the optical lens from the lens barrel, and the position and posture of the optical lens can be adjusted according to the deviation.

[0161] After adjusting the position of the optical lens, step 1006 and step 1008 may be repeated to further improve the assembly accuracy of the optical lens. When the deviation is small, step 1010 may be performed to assemble the lens barrel and the optical lens along the first direction.

[0162] Please refer to Fig.11 The step of assembling the lens barrel and the optical lens also includes step 1112, fixing the optical lens and the lens barrel together by a pressing sheet. The pressing sheet can be fixedly connected to the lens barrel. The edge of the pressing sheet overlaps the edge of the optical lens, so that the optical lens and the lens barrel remain fixed, thereby improving the stability of the lens.

[0163] In the present disclosure, the term "or" describes the association relationship between related objects and represents a non-exclusive inclusion. For example, "A or B" may include: only "A" exists, only "B" exists, and "A" and "B" exist at the same time, wherein "A" and "B" may be singular or plural. For another example, "A, B or C" may include: only "A" exists, only "B" exists, only "C" exists, "A" and "B" exist at the same time, "A" and "C" exist at the same time, "B" and "C" exist at the same time, and "A", "B" and "C" exist at the same time, wherein "A", "B" and "C" may be singular or plural. In addition, the symbol " / " in the present disclosure indicates that there is an "or" relationship between the related objects before and after the symbol. In the present disclosure, the terms "at least one A or B" and "at least one of A or B" have the same meaning as the above-mentioned "A or B". The terms "at least one of A, B or C" and "at least one of A, B or C" have the same meaning as "A, B or C" described above.

[0164] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. In addition, the above embodiments can be freely combined as needed.

[0165] The above description is only an embodiment of the present disclosure and is not intended to limit the present disclosure. Although the present disclosure is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments, or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. An assembly device for assembling an optical lens into a lens barrel, characterized in that: The assembly device comprises: A first positioning device configured to fix the lens barrel; A second positioning device, configured to fix the optical lens; A visual acquisition device configured to acquire an image of the optical lens; An assembling device configured to absorb the optical lens in the second positioning device; the assembling device has a degree of freedom at least in the optical axis direction of the optical lens; and A driving device, configured to drive the assembling device to drive the optical lens to be assembled with the lens barrel along the optical axis direction of the optical lens; The assembling device comprises: At least two elastic members, wherein the at least two elastic members are configured to be elastically deformable in the direction of the optical axis of the optical lens, and the at least two elastic members are not on the same straight line; A sensor configured to obtain the elastic force or elastic deformation of the elastic member to detect the force exerted by the assembling device and the lens barrel on the optical lens; The assembly device is configured to provide freedom in the optical axis direction of the optical lens through the elastic member; when the optical lens is assembled using the assembly device, the assembly device can be deformed or displaced along the optical axis direction of the optical lens.

2. The assembly device according to claim 1, characterized in that: The assembly device also includes: The limiting member is configured to limit the elastic deformation of the elastic member, and the elastic deformation of the elastic member is not greater than 0.5 mm.

3. The assembly device according to claim 1, characterized in that: The assembling device comprises: The adsorption structure is configured to adsorb the optical lens.

4. The assembly device according to claim 1, characterized in that: The assembly device also has freedom in a plane perpendicular to the optical axis direction of the optical lens.

5. The assembly device according to claim 4, characterized in that: The assembly device also includes: The first structural layer and the second structural layer are arranged in parallel along the optical axis direction of the optical lens; Among them, the first ends of the at least two elastic members abut against the first structural layer, the second ends of the elastic members abut against the second structural layer, the first structural layer is provided with a connecting member, the second structural layer is provided with a matching part, the connecting member is embedded in the matching part, and the connecting member is movable in the matching part, and the connecting member is configured to provide the assembly device with freedom in a plane perpendicular to the optical axis direction of the optical lens.

6. The assembly device according to claim 5, characterized in that: The matching portion has an inclined surface, and the inclined surface is configured to guide the connector to return to its original position when the first structure layer and the second structure layer are separated from each other.

7. The assembly device according to claim 1, characterized in that: The visual acquisition device comprises: A first camera is configured to obtain a first image of the optical lens in a first direction, wherein the first direction is parallel to the optical axis direction; At least one of the second positioning device or the driving device is configured to adjust the posture of the optical lens according to the first image.

8. The assembly device according to claim 7, characterized in that: The visual acquisition device also includes: A second camera is configured to obtain a second image of the optical lens in a second direction, wherein the second direction is parallel to the optical axis direction and opposite to the first direction; The driving device is configured to adjust the posture of the optical lens according to the second image.

9. The assembly device according to claim 1, characterized in that: The first positioning device comprises: a first positioning groove, wherein the shape of the first positioning groove matches the shape of the lens barrel; The first fixing member is configured to move toward the first positioning groove to fix the lens barrel in the first positioning groove.

10. The assembly device according to claim 1, characterized in that: The second positioning device comprises: a second positioning groove, wherein the shape of the second positioning groove matches the shape of the optical lens; The second fixing member is configured to move toward the second positioning groove to fix the optical lens in the second positioning groove.

11. The assembly device according to claim 10, characterized in that The second positioning device further includes: a first detector configured to detect at least one of the following: Whether the optical lens is in the second positioning groove; The positive and negative directions of the optical lens in the second positioning groove.

12. The assembly device according to claim 1, characterized in that Also includes: The pressing sheet fixing device is configured to fix the pressing sheet and fix the optical lens and the lens barrel together through the pressing sheet when the pressing sheet fixing device is flipped onto the first positioning device.

13. The assembly device according to claim 12, characterized in that The tablet fixing device includes: a second detector configured to detect whether the tablet is located on the tablet fixing device.

14. A lens assembly method, characterized in that: include: Fix the lens barrel and optical lenses; Determine the position of the optical lens in a first direction, where the first direction is parallel to the optical axis direction of the optical lens; Absorbing the optical lens; Assembling the lens barrel and the optical lens along the first direction; Wherein, the optical lens can float in the direction of the optical axis during the assembly process.

15. The lens assembly method according to claim 14, characterized in that: The absorbing the optical lens also includes: Taking out the optical lens; Determine the position of the optical lens in a second direction, where the second direction is parallel to the optical axis direction of the optical lens and opposite to the first direction.

16. The lens assembly method according to claim 15, characterized in that: Also includes: Adjust the posture of the optical lens according to the first image of the optical lens in the first direction and the second image of the second direction.

17. The lens assembly method according to claim 14, characterized in that: The absorbing the optical lens also includes: Suctioning the optical lens and placing it on the lens barrel; Determine the position and posture of the optical lens in a first direction, and adjust the position and posture of the optical lens.

18. The lens assembly method according to claim 14, characterized in that: The assembling of the lens barrel and the optical lens further comprises: The optical lens and the lens barrel are fixed together by a pressing sheet.

Images