Polishing apparatus

Abstract

The application provides a polishing device, belonging to the field of lens preparation, wherein the polishing device comprises a polishing table and a shielding member; the polishing table comprises at least one accommodating groove, each accommodating groove is configured to accommodate one lens to be processed, wherein the view window area of the lens to be processed faces the processing side of the polishing table and is exposed to the opening of the accommodating groove, and the processing side is the side of the polishing table used for polishing; the shielding member is located on the processing side of the polishing table and partially covers the opening of the accommodating groove, so that when the lens to be processed is located in the accommodating groove, the shielding member covers the view window area of the lens to be processed. The polishing device provided by the application can avoid excessive polishing of the view window area of the lens, thereby improving the optical performance of the lens.

Description

Technical Field

[0001] This application relates to the field of lens manufacturing technology, and in particular to a polishing apparatus. Background Technology

[0002] In mobile phones and other electronic devices, excessively long polishing times for camera lenses can degrade their optical performance and reduce lens yield. Therefore, it is necessary to improve the polishing process of camera lenses to enhance their optical performance. Summary of the Invention

[0003] This application provides a polishing apparatus that can avoid over-polishing of the viewing window area in a lens, thereby improving the optical performance of the lens.

[0004] The technical solution is as follows: On the one hand, a polishing apparatus is provided, the polishing apparatus including a polishing table, a shielding member, and a workpiece; The polishing table includes at least one receiving slot, each receiving slot being configured to receive a lens to be processed, wherein the viewing area of ​​the lens to be processed faces the processing side of the polishing table and is exposed through the opening of the receiving slot, the processing side being the side of the polishing table used for polishing; The shielding member is located on the processing side of the polishing table. The shielding member has a cover layer configured to shield the opening of the receiving groove. The cover layer is made of a stretchable material to allow the processing member to apply pressure to the cover layer to adhere it to the lens to be processed, such that when the lens to be processed is located in the receiving groove, the shielding member at least partially covers the viewing area of ​​the lens to be processed. The workpiece is located on the processing side of the polishing table, and the workpiece is configured to polish the lens to be processed after the shielding member at least partially covers the viewing window area of ​​the lens to be processed, and to polish the lens to be processed as a whole after the shielding member is removed.

[0005] In some embodiments, the shielding member further includes a support frame; The support frame is connected to the polishing table, and the support frame is bent to form a shielding space; The covering layer is located within the sheltered space, and the edge of the covering layer is connected to the support frame.

[0006] In some embodiments, the polishing table includes a plurality of the receiving slots; The covering layer includes connecting branches and multiple covering portions to form a perforated pattern, wherein: The plurality of coverings are separated from each other, and each of the coverings is used to cover the opening of one of the receiving slots; The connecting branch connects between two adjacent covers and between the edge of the cover and the support frame.

[0007] In some embodiments, the bottom of the receiving groove is provided with an assembly hole; The polishing apparatus further includes a positioning shaft, which is at least partially located within the mounting hole and is rotatable within the mounting hole, and is configured to fix the lens to be processed.

[0008] In some embodiments, the positioning shaft further includes a negative pressure chamber, which is connected to the receiving groove, and the negative pressure chamber is configured to adsorb the lens to be processed.

[0009] In some embodiments, the bottom wall of the receiving groove protrudes partially toward the opening to form a stepped structure, the stepped structure including a first stepped surface, a connecting side surface, and a second stepped surface; In the height direction of the polishing table, the first step surface is higher than the second step surface, and the connecting side is connected between the first step surface and the second step surface; The first stepped surface is configured to support the window area of ​​the lens to be processed, and the connecting side is configured to support the edge area of ​​the lens to be processed.

[0010] In some embodiments, the sidewall of the receiving groove includes an arcuate surface that slopes further away from the central axis of the receiving groove as it gets closer to the opening of the receiving groove.

[0011] In some embodiments, the polishing device is configured to polish objects with a size of 50 mm. 60mm to 50mm Polish the rectangular 3D lenses within an 80mm range; or, The polishing device is configured to polish circular 3D lenses with a size in the range of 50mm-80mm.

[0012] On the other hand, a method for preparing a 3D lens is provided, which involves polishing using the polishing apparatus described above, and the method includes: The lens to be processed is placed in the receiving groove; The shielding member is fixed to the processing side of the polishing table to at least partially shield the viewing area of ​​the lens to be processed; The lens to be processed is polished.

[0013] In some embodiments, after polishing the lens to be processed, the method further includes: Remove the shielding component and polish the entire lens to be processed.

[0014] The beneficial effects of the technical solution provided in this application include at least the following: The polishing apparatus provided in this application includes a shielding member that can shield the opening of a receiving groove for accommodating a lens to be processed. When the lens to be processed is placed in the receiving groove, the shielding member can block the viewing area of ​​the lens. Therefore, when polishing the lens using this apparatus, since the viewing area of ​​the lens cannot be polished because it is blocked by the shielding member, the unblocked edge areas can be polished normally. Thus, compared to the edge areas, the polishing time for the viewing area of ​​the lens is shorter, thereby avoiding over-polishing of the viewing area and improving the optical performance of the lens. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of a 3D lens structure is shown; Figure 2 This illustration shows a first structural schematic diagram of a polishing apparatus provided in an embodiment of this application; Figure 3 This illustration shows a first structural diagram of a polishing apparatus and a lens to be processed, according to an embodiment of this application. Figure 4 This illustration shows a second structural schematic diagram of a polishing apparatus provided in an embodiment of this application; Figure 5 This illustration shows a schematic diagram of the structure of a shielding component in a polishing apparatus according to an embodiment of this application; Figure 6 This illustration shows a second structural diagram of a polishing apparatus and a lens to be processed, according to an embodiment of this application. Figure 7 This paper shows a schematic diagram illustrating the projection relationship between the cover and the lens to be processed in a polishing apparatus according to an embodiment of this application. Figure 8 This illustration shows a schematic diagram of the assembly structure of a polishing table and a lens to be processed in a polishing apparatus provided in an embodiment of this application; Figure 9It shows Figure 8 Enlarged view of section A; Figure 10 A flowchart illustrating a method for fabricating a 3D lens according to an embodiment of this application is shown.

[0017] The reference numerals in the figure are respectively: 100. Polishing equipment; 1. Polishing table; 11. Receiving groove; 12. Assembly hole; 13. Step structure; 131. First step surface; 132. Connecting side; 133. Second step surface; 14. Curved surface; 2. Shielding component; 21. Support frame; 211. Shielding space; 22. Covering layer; 221. Connecting branch; 222. Covering part; 3. Positioning shaft; 31. Negative pressure chamber; 4. Machined parts; 41. Loading parts; 42. Polished parts; 200. Lens to be processed; 201. Viewing window area; 2011. Light-receiving area; 202. Edge area. Detailed Implementation

[0018] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0019] For camera lenses, the surface flatness parameter (such as the PV value) has a crucial impact on image quality. The PV value refers to the difference between the peaks and troughs on the lens surface; a higher PV value indicates a more uneven surface. Excessive polishing time can increase the PV value and cause scratches on the lens surface. When the camera captures an image, ambient light passing through the lens is refracted at these scratches, altering the direction of light transmission and thus affecting image quality.

[0020] To address this issue, this application provides a polishing apparatus for polishing camera lenses. By using a shielding component to block the viewing area of ​​the lens to be processed, over-polishing of the viewing area can be avoided, thereby improving the optical performance of the camera lens. For ease of understanding, the structure of the polishing apparatus will be described using the polishing of a 3D lens as an example.

[0021] Figure 1 A schematic diagram of a 3D lens structure is shown. Figure 1As shown, the 3D lens to be processed 200 may include a viewing area 201 and an edge area 202. In some embodiments, the 3D lens is formed by hot bending the circumferential edge of a planar substrate (e.g., planar glass), such that the circumferential edge bends downward relative to the middle portion while the middle portion arches slightly upward, thereby forming a structure in which both the middle and the edge are arc-shaped.

[0022] Compared to 2D glass, which is flat overall, and 2.5D glass, which is flat in the middle and curved at the edges, the polishing method for 3D glass, which has a curved design in both the middle and the edges, is more complex.

[0023] Figure 1 The example shown is a circular 3D lens. In other embodiments, the 3D lens can also be a rectangular lens or a lens of other shapes.

[0024] Figure 2 A schematic diagram of a polishing apparatus provided in an embodiment of this application is shown; Figure 3 This diagram illustrates a structural schematic of a polishing apparatus and a lens to be processed, according to an embodiment of this application. Figure 2 and Figure 3 As shown, the polishing apparatus provided in this embodiment includes a polishing table 1 and a shielding member 2. The polishing table 1 includes at least one receiving groove 11, each receiving groove 11 being configured to receive a lens 200 to be processed. Furthermore, the viewing area of ​​the lens 200 to be processed faces the processing side of the polishing table 1 and is exposed through the opening of the receiving groove 11, which is the side of the polishing table 1 used for polishing.

[0025] The shielding member 2 is located on the processing side of the polishing table 1 and partially covers the opening of the receiving groove 11, so that when the lens to be processed 200 is located in the receiving groove 11, the shielding member 2 at least partially covers the viewing area 201 of the lens to be processed 200.

[0026] The polishing apparatus provided in this application embodiment can shield the opening of the receiving groove 11 used to accommodate the lens 200 to be processed by the shielding member 2. Thus, when the lens 200 to be processed is placed in the receiving groove 11, the shielding member 2 can shield the viewing area 201 of the lens 200. Therefore, when polishing the lens to be processed using this polishing apparatus, since the viewing area 201 of the lens 200 cannot be polished because it is shielded by the shielding member 2, the edge areas 202, etc., which are not shielded by the shielding member 2, can be polished normally. Therefore, compared to the edge areas 202, the polishing time of the viewing area 201 in the lens 200 is shorter, thereby avoiding over-polishing of the viewing area 201 in the lens 200 and improving the optical performance of the lens 200.

[0027] In some embodiments, the shape of the lens to be processed 200 may be similar to or identical to the shape of the receiving groove 11. For example, the lens to be processed 200 may be a circular lens, and correspondingly, the receiving groove 11 may be a circular groove. Alternatively, the shape of the lens to be processed 200 may differ from the shape of the receiving groove 11. For example, the lens to be processed 200 may be a rectangular lens. In this case, the receiving groove 11 may be a rectangular groove similar in shape to the lens to be processed 200, or it may be a circular groove. Furthermore, when the lens to be processed 200 is assembled into the receiving groove 11, the orthographic projection of the center of the lens to be processed 200 onto a setting plane may substantially coincide with the orthographic projection of the center of the receiving groove 11 onto a setting plane, which is perpendicular to the height direction of the polishing table 1 (or perpendicular to the depth direction of the receiving groove 11). In other words, the lens to be processed 200 may be received in the receiving groove 11 with its center aligned with the center of the receiving groove 11. In this case, the shielding member 2 can be used to shield the central region of the receiving groove 11.

[0028] In some embodiments, such as Figure 4 As shown, the polishing apparatus 100 may further include a processing component 4, which may be located on the processing side of the polishing table 1 for polishing the lens 200 to be processed that is fixed on the polishing table 1.

[0029] Exemplarily, the processing component 4 may include a loading component 41 and a polishing component 42 connected to the loading component 41 on the side facing the polishing table 1. The loading component 41 can move up and down and rotate relative to the polishing table 1, thereby causing the polishing component 42 to rotate relative to the polishing table 1; the polishing component 42 may be, for example, a polishing brush, which can polish the lens 200 to be processed using a polishing medium. In the unprocessed state, the processing component 4 may be suspended above the polishing table 1. When it is necessary to polish the lens 200 to be processed to switch to the processing state, the loading component 41 can drive the polishing component 4 to move towards the polishing table 1, so that the polishing component 4 can directly abut against the lens 200 to be processed, or abut against the lens 200 to be processed through the shielding component 2. Then the loading component 41 can drive the polishing component 4 to rotate relative to the polishing table 1 to polish the lens 200 to be processed.

[0030] In some embodiments, either the shielding member 2 or the processing member 4 can be connected to the polishing table 1 via a connecting mechanism (e.g., a connecting rod or a connecting arm). In other embodiments, either the shielding member 2 or the processing member 4 can also be detached from the polishing table 1, for example, suspended above the polishing table 1 by a support member not connected to the polishing table 1. In other embodiments, the shielding member 2 can also be directly fixed to the polishing table 1.

[0031] like Figure 3 and Figure 5As shown, the shielding member 2 may include a support frame 21 and a cover layer 22. The support frame 21 may be connected to the polishing table 1 and is bent to form a shielding space 211. The cover layer 22 may be located within the shielding space 211 and its edge is connected to the support frame 21. The cover layer 22 is configured to shield the opening of the receiving groove 11.

[0032] In some embodiments, the support frame 21 may be a closed ring, thereby connecting circumferentially to the edge of the cover layer 22, such that the connection strength of the cover layer 22 in all directions of the support frame 21 is substantially the same.

[0033] In some embodiments, the polishing table 1 may have only one receiving groove 11, so that only one lens 200 to be processed can be polished at a time using the polishing device. In this case, when the shielding member 2 is suspended on the processing side of the polishing table 1 by the connecting mechanism, the covering layer 22 can completely fill the shielding space 211 of the support frame 21, so that the edge of the covering layer 22 can be continuously connected to the support frame 21. At this time, the covering layer 22 can completely or partially cover the viewing area 201 of the lens 200 to be processed as needed.

[0034] Furthermore, the support frame 21 may surround the outside of at least one receiving groove 11. The shape of the support frame 21 may also match the shape of the polishing table 1. For example, the polishing table 1 may be frustum-shaped, in which case the support frame 21 may be annular. Alternatively, the polishing table 1 may be cuboid-shaped, in which case the support frame 21 may be a rectangular ring. The shape and size of the polishing table 1 can be determined based on the size and number of lenses 200 to be processed disposed thereon.

[0035] In some embodiments, the polishing table 1 may be provided with multiple receiving slots 11, so that multiple lenses 200 to be processed can be polished simultaneously using the polishing device, thereby improving the preparation efficiency of the lenses 200 to be processed. In this case, the covering layer in the shielding member 2 may be formed as a hollow pattern, so that multiple receiving slots 11 can be shielded simultaneously by one shielding member 2. Alternatively, the polishing table 1 may cooperate with multiple shielding members 2, with each shielding member 2 shielding one of the receiving slots 11.

[0036] In this embodiment, to ensure the shielding effect of the shielding member 2 on the opening of the receiving groove 11, when the support frame 21 is connected to the polishing table 1, the support frame 21 can be directly attached to the loading surface of the processing side of the polishing table 1, so that the cover layer 22 can fit against the lens 200 to be processed contained in the receiving groove 11, reducing the gap between the cover layer 22 and the lens 200 to be processed, and preventing the polishing medium from entering between the lens 200 to be processed and the cover layer 22 through the gap. The loading surface of the polishing table 1 is the side with the receiving groove 11.

[0037] In some embodiments, the shielding member 2 (support frame 21) is detachably connected to the polishing table 1. Exemplarily, the shielding member 2 can be fixed to the polishing table 1 by means of a pressure claw with a cylinder or a structure with a buckle.

[0038] Alternatively, the polishing apparatus may further include a pressing member connected to the polishing table 1, configured to press the light-shielding member onto the polishing table 1. The height of the pressing member relative to the polishing table 1 is adjustable. Exemplarily, at least two screws may be spaced apart along the edge of the polishing table 1, the pressing member is sleeved on the screws, and the pressing member is threadedly connected to the screws, so that the height of the pressing member relative to the polishing table 1 is adjustable as the pressing member rotates relative to the screws. The pressing member may be, for example, a pressing sheet. The clamping claw, the latching structure, and the screws and pressing member can be considered as the aforementioned connection mechanism.

[0039] In some embodiments, the polishing table 1 may include a limiting groove, the opening direction of which intersects with the opening direction of the receiving groove 11, for example, the opening direction of the limiting groove is perpendicular to the opening direction of the receiving groove 11. The edge of the shielding member 2 can be inserted into the limiting groove so that the shielding member can be arranged substantially parallel to the loading surface of the polishing table 1, or even attached to the loading surface of the polishing table 1. Furthermore, the support frame 21 and the limiting groove may each have one and the other of a limiting protrusion and a limiting recess with complementary shapes, thereby preventing the support frame 21 from rotating relative to the limiting groove through the cooperation of the limiting protrusion and the limiting recess, thus achieving the fixation between the shielding member 2 (support frame 21) and the polishing table 1.

[0040] In the embodiments of this application, such as Figure 5 As shown, when the polishing table 1 includes multiple receiving slots 11, the cover layer 22 may include connecting branches 221 and multiple covering portions 222 to form a perforated pattern. The multiple covering portions 222 are spaced apart from each other, and each covering portion 222 is used to cover the opening of one receiving slot 11. The connecting branches 221 connect adjacent covering portions 222 and the edge of the covering portion 222 to the support frame 21.

[0041] In some embodiments, the support frame 21 is made of a rigid material to define the external contour shape of the shield 2; the cover layer 22 is made of a stretchable material to allow the processing element 4 to apply pressure to the cover layer 22 to attach it to the lens 200 to be processed. Exemplarily, the stretching direction of the cover layer 22 may be parallel to the circumferential direction of the support frame 21, and the cover layer 22 may be tautly connected to the support frame 21.

[0042] For example, the support frame 21 is a steel ring, and the covering layer 22 is nylon fabric. The nylon mesh is abrasion-resistant, thin, and fine, which can avoid causing additional friction to the lens 200 to be processed.

[0043] In this embodiment of the application, the polishing device can be configured to polish objects with a size of 50mm. 60mm to 50mm The polishing device can be configured to polish rectangular 3D lenses within an 80mm range; alternatively, it can be configured to polish circular 3D lenses with dimensions ranging from 50mm to 80mm. The dimensions of the receiving groove 11 can be adapted to the dimensions of the 3D lens.

[0044] In some embodiments, the 3D lens can be applied to the rear camera of electronic devices such as mobile phones, so that the polishing device provided in this application embodiment can polish the 3D rear camera lens.

[0045] When the shielding member 2 is used to shield the receiving groove 11, in addition to the covering part 222, the connecting branches 221 connecting the covering parts 222 and the supporting frame 21 will also shield the lens 200 to be processed. In order to avoid the shielding area of ​​the lens 200 to be processed being too large due to the excessive size of the connecting branches 221, thereby reducing the polishing efficiency, the size of the connecting branches 221 can be no greater than 6mm.

[0046] Furthermore, to prevent the edge region 202 in the lens 200 from being insufficiently polished due to the obstruction of the connecting branch 221, at least one of the lens 200 and the shielding member 2 can be rotated relative to the polishing table 1, so that the position of the connecting branch 221 relative to the lens 200 can be varied. In some embodiments, when the shielding member 2 is used to cover multiple receiving slots 11 simultaneously, the lens 200 can be configured to rotate relative to the polishing table 1. When the lens 200 or the shielding member 2 rotates, the workpiece 4 can be fixed in position relative to the polishing table 1 without rotating.

[0047] In some embodiments, when the lens to be processed 200 is placed in the receiving groove 11, the central axis of the lens to be processed 200 may coincide with the central axis of the receiving groove 11, that is, the center of the lens to be processed 200 may be located on the central axis of the receiving groove 11. Correspondingly, when the shielding member 2 covers the opening of the receiving groove 11, the center of each covering portion 222 in the shielding member 2 may be located on the central axis of the receiving groove 11 it covers. In this case, when the lens to be processed 200 rotates around its central axis within the receiving groove 11, the covering portion 222 may retain coverage of the viewing area 201 of its corresponding lens to be processed 200.

[0048] In addition, such as Figure 1 , Figure 3 and Figure 6As shown, the lens to be processed 200, the receiving groove 11, and the covering portion 222 can each be substantially circular. The diameter of each covering portion 222 can be smaller than the diameter of the opening of the receiving groove 11, so that the covering portion 222 only covers the viewing area 201 of the lens to be processed 200 in the central region of the receiving groove 11, while exposing the edge area 202 of the lens to be processed 200 in the edge portion of the receiving groove 11, so that the workpiece 4 can polish the edge area 202.

[0049] In some embodiments, the viewing area 201 in the lens to be processed 200 may include a plurality of light-incident areas 2011, and the shielding member 2 is configured to shield the plurality of light-incident areas 2011 in the viewing area 201. For example, when the lens to be processed 200 is applied to a camera module, each light-incident area 2011 may correspond to one camera, and ambient light can enter the lens of the corresponding camera through the light-incident area 2011. For example, as... Figure 7 As shown, the lens to be processed 200 may include four light-receiving regions 2011. The light-receiving regions 2011 are illustrated as circular. In other embodiments, the light-receiving regions may also be of other shapes.

[0050] To ensure that the covering part 222 continuously covers the multiple light-incident areas 2011 of the lens 200 during its rotation, such as Figure 7 As shown, the diameter of the covering portion 22 may be no less than the maximum distance between the plurality of incident light regions 2011.

[0051] like Figure 7 As shown, the maximum distance between multiple incident light regions 2011 (e.g., is) Figure 7 A circle is drawn with the distance between the highest point of the uppermost light-receiving area 2011 and the lowest point of the lowermost light-receiving area 2011 as its diameter, and the center of this circle can be used as the center of the plurality of light-receiving areas 2011. When the lens to be processed 200 rotates within the receiving groove 11, it can rotate about an axis passing through the center of this circle. When the shielding member 2 covers the receiving groove 11, the center of the covering part 222 is substantially coincident with the center of the circle. In other words, when the lens to be processed 200 is assembled into the receiving groove 11, the orthographic projection of the center of the plurality of light-receiving areas 2011 on the setting plane coincides with the orthographic projection of the center of the corresponding covering part 222 on the setting plane. This setting plane is perpendicular to the height direction of the polishing table 1 (or perpendicular to the depth direction of the receiving groove 11), so that when the lens to be processed 200 rotates, the covering part 222 can always shield the plurality of light-receiving areas 2011 on the lens to be processed 200. In other embodiments, the shape of the covering part 222 can also be rectangular or other shapes.

[0052] In other words, the polishing apparatus provided in this application embodiment at least satisfies the following: the lens 200 to be processed, which is housed in the receiving groove 11, can rotate about the axis of the center of the plurality of light-receiving regions 2011, and the orthographic projection of the plurality of light-receiving regions 2011 on the set plane is located within the orthographic projection of their corresponding covering portion 222 on the set plane.

[0053] In the embodiments of this application, such as Figure 8 As shown, the bottom of the receiving groove 11 is provided with an assembly hole 12; the polishing device also includes a positioning shaft 3, which is at least partially located in the assembly hole 12 and can rotate within the assembly hole 12. The positioning shaft 3 is configured to fix the lens 200 to be processed.

[0054] For example, the mounting hole 12 can penetrate the polishing table 1 along the height direction of the polishing table 1, so that one end of the positioning shaft 3 can be exposed in the receiving groove 11 to fix the lens 200 to be processed placed in the receiving groove 11. The positioning shaft 3 can rotate about its own central axis. And as described above, the rotation axis of the positioning shaft 3 can pass through the center of the viewing window area 201 or through the center of the multiple light-receiving areas 2011, so that when the positioning shaft 3 drives the lens 200 to be processed fixed thereon to rotate, the viewing window area 201 or the multiple light-receiving areas 2011 can always be covered by the covering part 222.

[0055] In some embodiments, the polishing apparatus may include other connecting mechanisms for connecting to the positioning shaft 3 to drive the positioning shaft 3 to rotate and fix the positioning shaft 3 in the height direction of the polishing table 1 (or the depth direction of the receiving groove 11). This connecting structure may be, for example, a rotary motor or a rotary cylinder.

[0056] In the embodiments of this application, such as Figure 8 As shown, the positioning shaft 3 also includes a negative pressure cavity 31, which is connected to the receiving groove 11, and the negative pressure cavity 31 is configured to adsorb the lens 200 to be processed.

[0057] like Figure 8 As shown, the positioning shaft 3 may have a through hole extending through the positioning shaft 3 along the height direction of the polishing table 1. A device for evacuating vacuum (e.g., a negative pressure vacuum pump) can evacuate the through hole to form a negative pressure chamber 31.

[0058] Furthermore, one end of the positioning shaft 3 extending into the receiving groove 11 can be recessed away from the opening of the receiving groove 11 to form an adsorption port. This adsorption port can serve as part of the negative pressure chamber 31 for adsorbing and fixing the lens 200 to be processed. By forming the adsorption port, the adsorption area of ​​the negative pressure chamber 31 on the lens 200 to be processed is increased, thereby improving the fixing stability of the lens 200 to be processed and avoiding damage to the lens 200 to be processed due to a small negative pressure adsorption area.

[0059] In the embodiments of this application, such as Figure 9 As shown, the bottom wall of the receiving groove 11 may protrude partially toward the opening of the receiving groove 11 to form a stepped structure 13. The stepped structure 13 includes a first stepped surface 131, a connecting side surface 132, and a second stepped surface 133. In the height direction of the polishing table 1, the first stepped surface 131 is higher than the second stepped surface 133, and the connecting side surface 132 connects the first stepped surface 131 and the second stepped surface 133. The first stepped surface 131 is configured to support the viewing window area 201 of the lens to be processed 200, and the connecting side surface 132 is configured to support the edge area 202 of the lens to be processed 200.

[0060] The height direction of the polishing table 1 can also be understood as the depth direction of the receiving groove 11. In this height direction, the first step surface 131 being higher than the second step surface 133 can be understood as the first step surface 131 being closer to the opening of the receiving groove 11 than the second step surface 133.

[0061] The shape of the first step surface 131 can be set to be basically the same as the shape of the window area 201, or slightly smaller than the size of the window area 201. When the lens to be processed 200 is placed in the receiving groove 11, the window area 201 can be attached to the first step surface 131.

[0062] The connecting side 132 can be inclined relative to the first step surface 131, and its end away from the first step surface 131 can be biased toward the side wall of the receiving groove 11 to accommodate the curvature of the edge region 202 of the lens to be processed relative to the window region 201, so that when the lens to be processed 200 is placed in the receiving groove 11, the edge region 202 can naturally adhere to the connecting side 132 without changing the shape of the lens to be processed 200.

[0063] The second step surface 133 can be parallel to the first step surface 131, and its end away from the connecting side 132 can be connected to the side wall near the receiving groove 11, so that when the lens to be processed 200 is placed in the receiving groove 11, there is a certain gap between the edge region 202 and the side wall of the receiving groove 11, so that the processing part 4 (e.g., the polishing part 42) can enter into the gap to polish the edge region 202.

[0064] In the embodiments of this application, such as Figure 9 As shown, the sidewall of the receiving groove 11 includes an arcuate surface 14, which is inclined further away from the central axis of the receiving groove 11 as it gets closer to the opening of the receiving groove 11.

[0065] For example, such as Figure 9As shown, the arc-shaped surface 14 is located on the side of the second step surface 133 away from the connecting side surface 132 and the first step surface 131. One end of the arc-shaped surface 14 is connected to the second step surface 133, and the other end can extend along the depth direction of the receiving groove 11 and bend away from the second step surface 133. With this configuration, the opening of the receiving groove 11 can be set in the shape of a flared mouth, thereby increasing the gap between the side wall of the receiving groove 11 and the connecting side surface 132 used to support the edge region 202, further facilitating the workpiece 4 to enter the gap to polish the edge region 202.

[0066] This application embodiment also provides a method for preparing 3D lenses, which uses the polishing device described above for polishing, and as... Figure 10 As shown, the method includes: S101. Place the lens to be processed 200 into the receiving groove 11; S102. Fix the shielding member 2 to the processing side of the polishing table 1 to at least partially shield the viewing area of ​​the lens 200 to be processed. S103. Polish the lens 200 to be processed.

[0067] In some embodiments, placing the lens to be processed 200 in the receiving groove 11 includes: adsorbing the lens to be processed 200 through the negative pressure chamber 31. Exemplarily, a negative pressure environment can be created by evacuating the through hole on the positioning shaft 3 using a negative pressure vacuum pump, and the lens to be processed 200 can be adsorbed through the adsorption port.

[0068] In some embodiments, polishing the lens 200 to be processed includes: driving the positioning shaft 3 to rotate within the mounting hole 12 to rotate the lens 200 to be processed. In some embodiments, each positioning shaft 3 can be used to fix one lens 200 to be processed; different positioning shafts 3 can rotate independently or synchronously.

[0069] In some embodiments, after polishing the lens 200 to be processed, the method further includes: Remove the shielding part 2 and polish the entire lens 200 to be processed.

[0070] In the aforementioned masking and polishing process S103, the connecting branch 221 in the masking member 2 may mask some edge areas 202, resulting in the polishing accuracy of these edge areas 202 not meeting the requirements. In this case, the polishing accuracy of the lens 200 to be processed can be processed to meet the set requirements in the overall polishing process after the masking and polishing process S103. At the same time, in the overall polishing process after removing the masking member 2, the viewing area 201 can also be processed to meet the set requirements in terms of polishing accuracy.

[0071] This application also provides a method for preparing a 3D lens, which uses the polishing device described above for polishing and includes the following steps: S111, Glass cutting.

[0072] Cut the glass to the required shape and size as needed. For example, for a size of 50mm. 60mm to 50mm Rectangular lenses within the 80mm range; or round lenses with a size between 50mm and 80mm.

[0073] S112, lens hot bending, to prepare the lens to be processed 200.

[0074] For example, the cut lens can be placed on a mold and its edges can be heat-bent to form a 3D structure with curved center and edges. Since mold marks are left in the stress-deformed areas during the lens heat bending process, these need to be removed through the polishing process described below.

[0075] S113. Place the lens to be processed 200 into the receiving groove 11.

[0076] S114. Fix the shielding member 2 to the processing side of the polishing table 1 to at least partially shield the viewing area of ​​the lens 200 to be processed.

[0077] S115. Polish the lens 200 to be processed.

[0078] The polishing process following the assembly of the shielding component 2 (i.e., process S115) can be referred to as the shielding polishing process. Because the edge region 202, which undergoes hot bending deformation, experiences greater stress and heavier molding, while the central window region 201 has lighter molding and requires a higher degree of surface flatness, the edge region 202 can be polished for a longer period compared to the window region 201. Furthermore, to improve the polishing uniformity of the unshielded areas of the lens 200 to be processed, the lens 200 can rotate within the receiving groove 11 to achieve rotary polishing.

[0079] S116. Remove the shielding part 2 and polish the entire lens 200 to be processed.

[0080] After removing the shielding element 2, the edge region 202 and the window region 201 in the lens to be processed are polished as a whole so that the polishing accuracy of the edge region 202 and the window region 201 respectively meets the set requirements.

[0081] S117, Lens reinforcement.

[0082] For example, the strength of a lens can be improved through physical and / or chemical treatment processes.

[0083] S118. Lens optical performance testing.

[0084] After polishing, the surface planarity parameters (e.g., PV value) of the lens are tested. Lenses whose optical performance meets the set requirements proceed to the next process; while lenses whose optical performance does not meet the set requirements can be discarded directly or returned to step S113 or step S116 for repolishing.

[0085] S119, Lens screen printing or coating.

[0086] For example, a protective ink layer can be screen-printed or a chemical protective layer (such as a silicon oxide layer or an iron oxide layer) can be plated to protect the glass lens.

[0087] S1110, Lens film.

[0088] For example, a UV film or anti-reflective coating can be attached to the outer side of the lens to improve its optical performance when used as a rear camera lens.

[0089] In the description of this disclosure, it should be understood that the terms (if any) such as “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0090] Unless otherwise expressly specified and limited, the terms “installation,” “connection,” and “linkage” (if any) shall be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; they may refer to the internal communication of two components or the interaction between two components. Those skilled in the art will be able to understand the specific meaning of the above terms in this application according to the specific circumstances.

[0091] Furthermore, the terms "first" and "second" (if any) are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0092] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0093] In the description of this specification, the references to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the embodiments or examples that are included in at least one embodiment or example of this application.

[0094] The above description is merely an embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this application should be included within the protection scope of this application.

Claims

1. A polishing apparatus, characterized in that, The polishing device includes a polishing table (1), a shielding component (2), and a processing component (4). The polishing table (1) includes at least one receiving groove (11), each receiving groove (11) being configured to receive a lens (200) to be processed, wherein the viewing area (201) of the lens (200) to be processed faces the processing side of the polishing table (1) and is exposed through the opening of the receiving groove (11), the processing side being the side of the polishing table (1) used for polishing; The shielding member (2) is located on the processing side of the polishing table (1). The shielding member (2) has a cover layer (22) configured to shield the opening of the receiving groove (11). The cover layer (22) is made of a stretchable material to allow the processing member (4) to apply pressure to the cover layer (22) to adhere it to the lens to be processed (200) so that when the lens to be processed (200) is located in the receiving groove (11), the shielding member (2) at least partially covers the viewing area (201) of the lens to be processed (200). The processing component (4) is located on the processing side of the polishing table (1). The processing component (4) is configured to polish the lens to be processed (200) after the shielding component (2) at least partially covers the window area (201) of the lens to be processed (200), and to polish the lens to be processed (200) as a whole after the shielding component (2) is removed.

2. The polishing apparatus according to claim 1, characterized in that, The shielding element (2) also has a support frame (21); The support frame (21) is connected to the polishing table (1), and the support frame (21) is bent to form a shielding space (211). The covering layer (22) is located within the shielding space (211), and the edge of the covering layer (22) is connected to the support frame (21).

3. The polishing apparatus according to claim 2, characterized in that, The polishing table (1) includes a plurality of the receiving slots (11); The covering layer (22) includes connecting branches (221) and multiple covering portions (222) to form a perforated pattern, wherein: The plurality of covers (222) are separated from each other, and each of the covers (222) is used to cover the opening of one of the receiving slots (11); The connecting branch (221) connects between two adjacent covers (222) and between the edge of the cover (222) and the support frame (21).

4. The polishing apparatus according to any one of claims 1 to 3, characterized in that, The bottom of the receiving groove (11) is provided with an assembly hole (12). The polishing apparatus further includes a positioning shaft (3) which is at least partially located within the mounting hole (12) and is rotatable within the mounting hole (12). The positioning shaft (3) is configured to fix the lens to be processed (200).

5. The polishing apparatus according to claim 4, characterized in that, The positioning shaft (3) also includes a negative pressure chamber (31), which is connected to the receiving groove (11), and the negative pressure chamber (31) is configured to adsorb the lens to be processed (200).

6. The polishing apparatus according to any one of claims 1 to 3, characterized in that, The bottom wall of the receiving groove (11) protrudes partially toward the opening to form a stepped structure (13), the stepped structure (13) including a first stepped surface (131), a connecting side surface (132), and a second stepped surface (133). In the height direction of the polishing table (1), the first step surface (131) is higher than the second step surface (133), and the connecting side surface (132) connects the first step surface (131) and the second step surface (133); The first step surface (131) is configured to support the window area (201) of the lens to be processed (200), and the connecting side surface (132) is configured to support the edge area (202) of the lens to be processed (200).

7. The polishing apparatus according to claim 6, characterized in that, The sidewall of the receiving groove (11) includes an arcuate surface (14), which is inclined further away from the central axis of the receiving groove (11) the closer it is to the opening of the receiving groove (11).

8. The polishing apparatus according to claim 1, characterized in that, The polishing device is configured to polish objects with a size of 50mm. 60mm to 50mm Polish the rectangular 3D lenses within an 80mm range; or, The polishing device is configured to polish circular 3D lenses with a size in the range of 50mm-80mm.

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