Lens processing equipment and its processing method

Abstract

The present invention provides a processing device and a processing method for a lens. The processing device mainly includes a bench, a substrate fixture (T) fixed on the bench, and a conical circular roller assembly, which can move relative to each other; the conical circular roller assembly includes a mirror roller (A) and a structure roller (B) arranged correspondingly, and an annular groove structure is stacked on the surface of the structure roller (B); the processing device further includes a glue injection mechanism (D), and the glue injection port of the glue injection mechanism (D) is located in the large radius area of the structure roller (B); the processing device further includes a curing mechanism (U), and the curing mechanism (U) is arranged below the structure roller (B). The finished product of the present invention has good appearance and uniformity, is particularly suitable for the production and application of large-size display screens, improves the product yield, reduces the cost, and ensures that the screen has a better visual effect.

Description

[0001] This application is a divisional application based on the application with the application date of October 18, 2017, application number 201710957858.0, and invention title "Lens Processing Equipment and Its Processing Method". Technical Field

[0002] The present invention relates to a lens processing equipment and its processing method, belonging to the technical field of optical component manufacturing. Background Art

[0003] A large-size annular groove structure lens is a lens with one side being a smooth surface and the other side engraved with concentric circles or Archimedean spirals. Currently, it is increasingly widely used in various industries. For example, it is applied in the field of solar light concentration and is one of the important optical components in a concentrating photovoltaic (CPV) system. Its performance directly affects the light concentration ratio of the CPV system. It is also applied in the display field, and its main function is to collect the light with a large divergence angle projected by a projector, so that the original divergent light can be concentrated within the viewing angle of the audience to increase the image brightness. Under this background and market demand, it is necessary and market-required to manufacture a high-precision and high-quality structure.

[0004] In the prior art, the processing method of the annular groove structure mostly uses a large machine tool to engrave a mold, and then uses the engraved mold for integral casting or molding, or directly grinds and engraves on the lens substrate. In the prior art, there are no measures to control the thickness uniformity, no measures to eliminate the deformation after glue molding before curing and the air bubbles on the glue / substrate surface. In addition, in the existing conical roller production technology, as can be seen from the content disclosed in the prior patent with the patent number ZL201410170395.X, this process method is relatively simple, lacking a process method for the thickness uniformity and air bubble elimination of the structure, and it is impossible to produce a large-size Fresnel product with uniform product and good appearance. The through rate is relatively low, which is not conducive to subsequent applications. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a lens processing equipment and its processing method in view of the deficiencies of the prior art. The processed finished product has good appearance and uniformity, is especially suitable for the production and application of large-size display screens, improves the product yield, reduces the cost, and ensures that the screen has a better visual effect.

[0006] The technical problem to be solved by the present invention is achieved through the following technical solutions: A processing device for a lens, including a bench. The processing device mainly includes a substrate fixture and a tapered circular roller assembly fixed on the bench, and relative movement can occur between the two. The tapered circular roller assembly includes a mirror roller and a structural roller arranged correspondingly, and an annular groove structure is stacked on the surface of the structural roller. The processing device includes a glue injection mechanism, and the glue injection port of the glue injection mechanism is located in the large-radius area of the structural roller. The processing device further includes a curing mechanism, which is arranged below the structural roller. A substrate is fixed on the substrate fixture, and the substrate passes through the gap between the mirror roller and the structural roller, forming a threading path in the lens processing device. In order to ensure an effective demolding time, the threading path is in an "S" shape, and the substrate penetrates into the gap between the mirror roller and the structural roller from above the mirror roller, and then exits from below the structural roller and above the curing mechanism.

[0007] Specifically, the substrate fixture is semicircular and rotates circumferentially around its center, generating relative movement with the tapered circular roller assembly.

[0008] The small-radius ends of the mirror roller and the structural roller are respectively connected to a horizontal bearing through a first bearing and a second bearing. The first bearing and the second bearing make the mirror roller and the structural roller respectively take their small-radius ends as fixed ends and rotate around their respective axes in the horizontal plane. The horizontal bearing makes the mirror roller and the structural roller rotate around the horizontal bearing as the center in the horizontal plane, generating relative movement with the substrate fixture.

[0009] For the convenience of adjustment, an adjustment component is also provided in the tapered circular roller assembly for adjusting the size of the gap between the mirror roller and the structural roller. The adjustment component mainly includes an annular groove opened on the side of the horizontal bearing, and the first bearing is embedded in the annular groove and is limited and fixed by fixed blocks on both sides.

[0010] For effectively controlling the flow rate, a flow control component is also provided on the glue injection mechanism. The flow control component includes: a ball valve or a pump.

[0011] Under normal circumstances, the glue in the glue injection mechanism is a photo-curing glue, and its viscosity range is 50 - 500 centipoises.

[0012] In addition, the curing mechanism is composed of multiple UV light sources, and the effective irradiation area is half of the wrapping area of the substrate and the structural roller.

[0013] The present invention also provides a processing method for the above-mentioned lens processing device, and this method includes the following steps:

[0014] Step 100: Fix the substrate on the substrate fixture;

[0015] Step 200: Turn on the glue injection mechanism, inject glue at the large radius of the structure roller, and turn on the curing device;

[0016] Step 300: The substrate fixture makes a circular motion around its center point in the circumferential direction, and at the same time drives the substrate to move between the mirror roller and the structure roller;

[0017] Step 400: After the glue injected by the glue injection mechanism forms a structure consistent with the annular groove overlapping the surface of the structure roller shaft through the structure gap between the mirror roller and the structure roller, it reaches the curing area of the curing device and completes instant curing, thereby obtaining the formed structure. To ensure the effective demolding time, the step 100 further includes: passing the substrate into the gap between the mirror roller and the structure roller from above the mirror roller, and passing out from below the structure roller and above the curing mechanism, and the threading path is in an "S" shape.

[0018] The present invention also provides a processing method for a processing device of a lens as described above, and the method includes the following steps:

[0019] Step 100: Fix the substrate on the substrate fixture;

[0020] Step 200: Turn on the glue injection mechanism, inject glue at the large radius of the structure roller, and turn on the curing device;

[0021] Step 300: While the mirror roller and the structure roller rotate around their respective axes in the horizontal plane, they revolve around a fixed center in the horizontal plane, and the substrate fixture remains fixed, so that the substrate moves relative to the mirror roller and the structure roller;

[0022] Step 400: After the glue injected by the glue injection mechanism forms a structure consistent with the annular groove overlapping the surface of the structure roller shaft through the structure gap between the mirror roller and the structure roller, it reaches the curing area of the curing device and completes instant curing, thereby obtaining the formed structure. To ensure the effective demolding time, the step 100 further includes: passing the substrate into the gap between the mirror roller and the structure roller from above the mirror roller, and passing out from below the structure roller and above the curing mechanism, and the threading path is in an "S" shape.

[0023] In summary, the present invention provides a processing device and a processing method for a lens, having the following advantages: By controlling the gap between the conical mirror roller and the structure roller, the glue dosage is accurately guaranteed, and the loss is reduced; The structure forming method of forming and curing simultaneously can obtain accurate structure angles; On the basis of the structure forming method of forming and curing simultaneously, glue with a lower viscosity can be selected. The glue is stored and circulated in the V-shaped groove between the two rollers, and air bubbles in the glue can be completely removed. The formed structure has good thickness uniformity and good structure appearance, and there are no small air bubbles affecting it; It is particularly suitable for the production and application of large-size display screens, improving the product yield, reducing costs, and ensuring that the screen has a better visual effect.

[0024] The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of the processing device of the present invention;

[0026] Figure 2 is a three-dimensional view of the setting manner of the base material of the present invention between the mirror roller and the structure roller;

[0027] Figure 3 is a schematic diagram of the setting manner of the base material of the present invention between the mirror roller and the structure roller;

[0028] Figure 4 、 Figure 5 and Figure 6 are respectively schematic diagrams of the connection structures of the mirror roller and the structure roller of the present invention with their respective bearings;

[0029] Figure 7 is a schematic diagram of the adjusting component structure of the present invention;

[0030] Figure 8 is a schematic diagram of the finished lens product with a ring groove microstructure of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Figure 1 is a schematic diagram of the overall structure of the processing device of the present invention; Figure 2 is a three-dimensional view of the setting manner of the base material of the present invention between the mirror roller and the structure roller; Figure 3 is a schematic diagram of the setting manner of the base material of the present invention between the mirror roller and the structure roller. As Figures 1 to 3 shown, the present invention provides a processing device for a lens. The processing device mainly includes a base material clamp T and a conical circular roller assembly, and the two can move relative to each other. Specifically, the conical circular roller assembly includes a corresponding mirror roller A and a structure roller B. The surface of the mirror roller A is electroplated with a hard metal coating, and a ring groove structure is stacked on the surface of the structure roller B. Combining Figure 4 and Figure 5As shown, the annular grooves stacked on the surface of the structural roller B are complete annular grooves arranged along the circumferential direction of the structural roller, and the grooves are equally spaced along the axial direction of the structural roller. The processing equipment includes a glue injection mechanism D, and the glue injection port in the glue injection mechanism D is located in the large-radius area of the structural roller B. Glue is injected from the injection port and covers the surface of the substrate C. When the substrate C passes through the gap between the mirror roller A and the structural roller B, the glue covering the surface of the substrate C forms a structure consistent with that of the annular grooves stacked on the surface of the structural roller B under the action of the annular grooves; the processing equipment further includes a curing mechanism U, which is arranged below the structural roller B. The curing mechanism U is composed of multiple UV light sources, and the effective irradiation area is half of the wrapping area of the substrate C and the structural roller B, so that the glue is quickly cured and formed.

[0032] Combined with Figure 2 and Figure 3 As shown, a substrate C is fixed on the substrate fixture T to ensure that there is no relative displacement between the substrate C and the substrate fixture T after tension is applied thereto. To ensure an effective demolding time, under the relative movement between the substrate fixture T and the conical roller assembly, the substrate C passes through the gap between the mirror roller A and the structural roller B from above the mirror roller A, and passes out from below the structural roller B and above the curing mechanism U. The threading path is in an "S" shape. The substrate C among them includes materials such as PET, PC or PMMA.

[0033] Since the substrate C is fixed on the substrate fixture T and there is no relative movement between the two, to complete the entire processing process, relative movement needs to be generated between the substrate fixture T and the conical roller assembly. The movement mode can adopt various modes according to actual requirements. The substrate fixture T is semi-circular and can either perform circular motion centered on the center of the substrate fixture to generate relative movement with the conical roller assembly; or the mirror roller A and the structural roller B can perform co-linear speed radial low-friction rotation centered on their small-radius ends to generate relative movement with the substrate fixture T. Figure 4 、 Figure 5 and Figure 6 are respectively schematic diagrams of the connection structures of the mirror roller and the structural roller of the present invention with their respective bearings. As Figures 4 to 6As shown, the small-radius ends of the mirror roller A and the structure roller B are respectively connected to a horizontal bearing E through a first bearing F and a second bearing G. The first bearing F and the second bearing G make the mirror roller A and the structure roller B respectively take their small-radius ends as fixed ends and rotate around their respective axes in the horizontal plane. At the same time, the mirror roller A and the structure roller B as a whole revolve around a fixed center in the horizontal plane, that is: the mirror roller A and the structure roller B rotate along the circumferential direction of the horizontal bearing E with the axis of the horizontal bearing E as the fixed center. Through the above-mentioned rotation and revolution, and keeping the substrate fixture stationary, relative movement is generated between the mirror roller A and the structure roller B and the substrate fixture T.

[0034] In order to effectively control the glue thickness, an adjustment component is also provided in the conical circular roller assembly for adjusting the size of the gap between the mirror roller A and the structure roller B. Figure 7 Schematic structural diagram of the adjustment component of the present invention. As Figure 7 shown, the adjustment component mainly includes an annular groove I opened on the side of the horizontal bearing E. The first bearing F is embedded in the annular groove I and is limited and fixed on both sides by fixed blocks K. The fixed blocks K are arranged on both sides of the first bearing F through fixed nuts J. By fixing the fixed blocks K at different positions in the annular groove I, the adjustment of the size of the gap between the mirror roller A and the structure roller B is realized. In Figure 7 the shown embodiment, the first bearing F is embedded in the annular groove I. In actual applications, of course, according to needs, the second bearing G can also be embedded in the annular groove I. No matter which bearing is fixed, it can play a role in adjusting the size of the gap between the mirror roller A and the structure roller B.

[0035] At the same time, it is also necessary to effectively control the flow rate of the glue. Therefore, a flow rate control component is also provided on the glue injection mechanism D. The flow rate control component can be a faucet type and the flow rate is controlled by a ball valve, or it can be a pump type and the flow rate is controlled by a pump body. Usually, the glue is a photo-curing glue, and its viscosity range is 50 - 500 cps (centipoise).

[0036] Combined with Figures 1 to 6 shown, the processing method of the lens processing equipment provided by the present invention is as follows:

[0037] Embodiment 1

[0038] First: Fix the substrate C on the substrate fixture T. To ensure the effective demolding time, pass the substrate C through the gap between the mirror roller A and the structure roller B from above the mirror roller A, and pass it out from below the structure roller B and above the curing mechanism U. The threading path is in an "S" shape. Then: Turn on the glue injection mechanism D and inject glue at the large radius of the structure roller B, and turn on the curing device U. Immediately afterwards: The substrate fixture T makes a circular motion around its center point in the circumferential direction, and at the same time drives the substrate C to move between the mirror roller A and the structure roller B. Finally: The glue injected by the glue injection mechanism D passes through the structural gap between the mirror roller A and the structure roller B, forms a structure consistent with the annular groove superimposed on the surface of the structure roller shaft, reaches the curing area of the curing device U, and completes instant curing, thereby obtaining the formed structure. Figure 8 Schematic diagram of the finished lens product with the annular groove microstructure of the present invention. As Figure 8 can be seen from the figure, the surface of the finished product of the present invention has the same structure as the annular groove superimposed on the surface of the structure roller B.

[0039] In summary, in this embodiment, the combined axis of the mirror roller A and the structure roller B is fixed in the horizontal direction and can rotate freely in the radial direction; the annular fixture T can make a circular motion in the circumferential direction.

[0040] Embodiment 2

[0041] This embodiment is basically the same as Embodiment 1. The only difference is that in Embodiment 1, the substrate fixture T is moving and the conical circular roller assembly is stationary; in Embodiment 2, the mirror roller A and the structure roller B rotate around their respective axes in the horizontal plane while revolving around a fixed center in the horizontal plane, and the substrate fixture T remains stationary, so that the substrate C moves relative to the mirror roller A and the structure roller B. During the above process, the glue injected by the glue injection mechanism D passes through the structural gap between the mirror roller A and the structure roller B, forms a structure consistent with the annular groove superimposed on the surface of the structure roller shaft, reaches the curing area of the curing device U, and completes instant curing, thereby obtaining the formed structure.

[0042] In summary, in this embodiment, the combined axis of the mirror roller A and the structure roller B can rotate freely both horizontally and radially; the annular fixture T is a fixed device.

[0043] Other technical features in this embodiment are basically the same as those in Embodiment 1. For detailed content, please refer to Embodiment 1 and will not be elaborated here.

[0044] In summary, the present invention provides a lens processing device and its processing method, and its beneficial effects include the following points:

[0045] 1. By controlling the gap between the conical clearance wheel and the structure roller, the glue dosage is accurately guaranteed and the loss is reduced;

[0046] 2. By adopting the structure forming method of forming and curing simultaneously, an accurate structural angle can be obtained;

[0047] 3. Based on the structure forming method of forming and curing simultaneously, a glue with a lower viscosity can be selected. The glue is stored and circulated in the V-shaped groove between two wheels, and air bubbles in the glue can be completely removed. The formed structure has good thickness uniformity and good structural appearance, without being affected by small air bubbles.

[0048] The present invention is particularly suitable for the production and application of large-size display screens, improving the product yield, reducing costs, and ensuring that the screen has better visual effects.

Claims

1. A processing device for a lens, comprising a bench, characterized in that, The processing equipment mainly includes a substrate fixture (T) fixed on the bench and a tapered roller assembly, and relative movement can occur between the two; The tapered roller assembly includes a mirror roller (A) and a structured roller (B) arranged correspondingly. An annular groove structure is stacked on the surface of the structured roller (B). The small radius ends of the mirror roller (A) and the structured roller (B) are respectively connected to a horizontal bearing (E) through a first bearing (F) and a second bearing (G). The first bearing (F) and the second bearing (G) make the mirror roller (A) and the structured roller (B) respectively take their small radius ends as fixed ends and rotate around their respective axes in the horizontal plane; The gap between the mirror roller (A) and the structured roller (B) is used for inserting the substrate. The substrate forms a threading path between the mirror roller (A) and the structured roller (B). The axes of the mirror roller (A) and the structured roller (B) have an included angle in the horizontal plane so that the threading path of the substrate is in an "S" shape; The horizontal bearing (E) makes the mirror roller (A) and the structured roller (B) rotate around the horizontal bearing (E) as the center in the horizontal plane, generating relative movement with the substrate fixture (T); The processing equipment further includes a glue injection mechanism (D), and the glue injection port of the glue injection mechanism (D) is arranged on the structured roller; The processing equipment further includes a curing mechanism (U), which is arranged below the structured roller (B).

2. The processing device for a lens according to claim 1, characterized in that, The curing mechanism (U) is composed of multiple UV light sources with the same wavelength band, and the effective irradiation area is half of the wrapping area of the substrate (C) and the structured roller (B).

3. The processing equipment for the lens according to claim 1, characterized in that, The glue injection port of the glue injection mechanism (D) is located in the large radius area of the structured roller (B).

4. The processing equipment for the lens according to claim 1, characterized in that, The substrate fixture (T) is semi-circular and performs circular motion around its center, generating relative movement with the tapered roller assembly.

5. The processing equipment for the lens according to claim 1, characterized in that, The substrate fixture (T) is used to fix the substrate (C). The glue injection mechanism (D) injects and coats the glue on the surface of the substrate (C). When the substrate (C) passes through the gap between the mirror roller (A) and the structured roller (B), the glue coated on the surface of the substrate (C) forms a structure consistent with the annular groove under the action of the annular groove.

6. The processing equipment for the lens according to claim 1, characterized in that, An adjustment component is further provided in the tapered roller assembly for adjusting the size of the gap between the mirror roller (A) and the structured roller (B); The adjustment component mainly includes an annular groove (I) opened on the side of the horizontal bearing (E). The first bearing (F) is embedded in the annular groove and is limited and fixed by fixed blocks (K) on both sides.

7. The processing equipment for the lens according to claim 1, characterized in that, A flow control component is further provided on the glue injection mechanism (D); The flow control component includes: a ball valve or a pump.

8. The processing equipment for the lens according to claim 7, characterized in that, The glue in the glue injection mechanism (D) is a photo-curing glue, and its viscosity range is 50 - 500 centipoise.

9. A processing method for a processing device of a lens according to any one of claims 1-8, characterized in that, The method includes the following steps: Step 100: Fix a substrate (C) on the substrate fixture (T); Step 200: Turn on the glue injection mechanism (D) and inject glue at the large radius of the structured roller (B), and turn on the curing device (U); Step 300: The substrate fixture (T) moves in a circular motion around its center point in a circular direction, while driving the substrate (C) to move between the mirror roller (A) and the structure roller (B); Step 400: The glue injected by the glue injection mechanism (D) passes through the structural gap between the mirror roller (A) and the structure roller (B), forms a structure consistent with the annular groove superimposed on the surface of the structure roller shaft, and then reaches the curing area of the curing device (U) to complete instant curing, thereby obtaining the formed structure.

10. The processing method of the lens processing equipment according to claim 9, characterized in that, The step 100 further includes: threading the substrate (C) into the gap between the mirror roller (A) and the structure roller (B) from above the mirror roller, and threading out from below the structure roller and above the curing mechanism (U), and the threading path is in an "S" shape.

11. A processing method for a processing device of a lens according to any one of claims 1-8, characterized in that, The method includes the following steps: Step 100: Fix a substrate (C) on the substrate fixture (T); Step 200: Turn on the glue injection mechanism (D) and inject glue at the large radius of the structure roller (B), and turn on the curing device (U); Step 300: The mirror roller (A) and the structure roller (B) rotate around their respective axes in the horizontal plane while revolving around a fixed center in the horizontal plane, keeping the substrate fixture (T) stationary and making the substrate (C) move relative to the mirror roller (A) and the structure roller (B); Step 400: The glue injected by the glue injection mechanism (D) passes through the structural gap between the mirror roller (A) and the structure roller (B), forms a structure consistent with the annular groove superimposed on the surface of the structure roller shaft, and then reaches the curing area of the curing device (U) to complete instant curing, thereby obtaining the formed structure.

12. The processing method of the processing equipment for the lens according to claim 11, characterized in that, The step 100 further includes: threading the substrate (C) into the gap between the mirror roller (A) and the structure roller (B) from above the mirror roller, and threading out from below the structure roller and above the curing mechanism (U), and the threading path is in an "S" shape.

Images