WLO lens processing die

Abstract

The utility model relates to the field of coining processing equipment, in particular to a WLO lens processing die which comprises an upper plate, a lower plate, a plurality of die cores and a plurality of fixing screws, the upper plate and the lower plate are detachably connected, and the upper plate and the die cores are assembled in a shaft hole fit mode; the fixing screws are in one-to-one correspondence with the mold cores, penetrate through the lower plate from the lower surface of the lower plate and are in threaded connection with the bottoms of the mold cores; the top of the mold core is plated with a nickel-phosphorus alloy plating layer, and the aspheric lens is formed by processing the nickel-phosphorus alloy plating layer. According to the utility model, through the increase of the mold core holes, the batch production of large-size WLO lenses can be realized, so that the number of lenses which can be manufactured on a Wafer is increased, the cost is reduced, and during initial verification, a small number of mold cores can be independently manufactured for design verification; and in the production process and during later maintenance, the mold core can be independently replaced aiming at an abnormal or damaged lens, so that the maintenance cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of embossing processing equipment, in particular to a WLO lens processing mould. Background Art

[0002] Wafer Level Optics is a wafer-level lens manufacturing technology that manufactures optical lenses through wafer packaging. It is the product of the combination of semiconductor technology and optical technology.

[0003] For example, when using traditional injection molds, after the lens is designed, external structures such as lens barrels are needed to assemble the lens, which makes it impossible to make the size very small. Nanoimprint technology is a high-precision nanomanufacturing method that is used to copy the nanostructure of the template surface onto the surface of another material. It can manufacture materials with special surface nanostructures and can also be used in the production of optical films, photonic crystals and other materials.

[0004] However, in general nanoimprint metasurface production, only spherical designs can be produced, and problems such as spherical aberration cannot be solved in optical performance. Utility Model Content

[0005] Aiming at the problem of spherical aberration in products produced by nanoimprinting super surface in the prior art, the utility model provides a WLO lens processing mold.

[0006] The utility model is realized by the following technical solutions:

[0007] A WLO lens processing mold comprises an upper plate, a lower plate, multiple mold cores and multiple fixing screws. The upper plate and the lower plate are detachably connected, and the upper plate and the mold core are assembled by shaft hole matching; the fixing screws correspond to the mold core one by one, and the fixing screws pass through the lower plate from the lower surface of the lower plate and are threadedly connected to the bottom of the mold core; the top of the mold core is plated with a nickel-phosphorus alloy coating, and the aspheric lens is processed from the nickel-phosphorus alloy coating.

[0008] Preferably, a plurality of spaced mounting holes are provided on the upper plate, the mounting holes correspond to the mold cores one by one, and the mold cores can be detachably mounted in the mounting holes.

[0009] Preferably, the mold core includes a first part and a second part in a stepped shape, an aspheric lens is placed on the top of the first part, the bottom of the first part is fixedly connected to the top of the second part, and the bottom of the second part is threadedly connected to a fixing screw; the mounting hole is stepped, the mounting hole cooperates with the mold core, and the mounting hole includes a first hole and a second hole that are connected, the first part is located in the first hole, and the second part is located in the second hole.

[0010] Preferably, the cross section of the second portion is non-circular.

[0011] Preferably, the cross section of the second portion is a D-shaped cross section formed by cutting a circular cross section.

[0012] Preferably, the top plane of the first portion is flush with the upper surface of the upper plate.

[0013] Preferably, the error between the top plane of the first portion and the upper surface of the upper plate is less than 2 μm.

[0014] Preferably, an adjustment gasket is provided between the bottom of the second part and the upper surface of the lower plate, and the adjustment gasket is sleeved on the fixing screw.

[0015] Preferably, a countersunk hole is provided on the lower plate, a fixing screw is connected to the bottom of the second part through the countersunk hole, and a screw head of the fixing screw is located in the countersunk hole.

[0016] Preferably, the mounting hole is coaxial with the counterbore.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model adopts a core inlay method, uses nano-imprinting to produce optical aspheric surfaces, thereby improving the spherical aberration problem, and also uses nano-imprinting technology to reduce the overall lens size, so that products (such as medical endoscopes) can be made smaller and smaller; the shaft hole can assist the upper plate and the core to align and assemble, which helps to improve assembly efficiency. At the same time, the detachable upper and lower plates are helpful for single-axis replacement, later maintenance and cleaning of the core.

[0019] Furthermore, the stepped mold core cooperates with the stepped mounting hole, and the position of the mold core can be fixed by the cooperation of the fixing screws.

[0020] Furthermore, the second portion with a non-circular cross-section can prevent the mold core from rotating or slipping during the locking process and can play a limiting role.

[0021] Furthermore, the adjusting gasket is used to ensure that the upper surface of the mold core is flush with the upper surface of the upper plate.

[0022] Furthermore, the countersunk hole provides an installation space for fixing screws so that the fixing screws can lock the upper plate and the lower plate while ensuring the flatness of the lower surface of the lower plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a WLO lens processing mold of the utility model;

[0024] Figure 2 This is a structural schematic diagram of an upper plate in a WLO lens processing mold of the utility model;

[0025] Figure 3This is a schematic diagram of the structure of the lower plate in a WLO lens processing mold of the utility model;

[0026] Figure 4 It is a structural schematic diagram of a mold core in a WLO lens processing mold of the utility model;

[0027] Figure 5 It is a bottom schematic diagram of an upper plate in a WLO lens processing mold of the utility model;

[0028] Figure 6 yes Figure 5 A partial enlarged view of the middle A;

[0029] Figure 7 It is an exploded schematic diagram of a WLO lens processing mold of the utility model;

[0030] Figure 8 This is a schematic diagram of a WLO lens processing mold to be assembled in the utility model;

[0031] Fig. 9 The utility model is a schematic diagram of assembling a WLO lens processing mold.

[0032] In the figure, 1, upper plate; 2, lower plate; 3, core; 4, fixing screws; 5, mounting holes; 6, adjusting gaskets; 7, first part; 8, second part; 9, first hole; 10, second hole; 11, countersunk hole; 12, aspheric lens. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0034] The utility model discloses a WLO lens processing mold, referring to Figure 1 , including an upper plate 1, a lower plate 2, a plurality of mold cores 3 and a plurality of fixing screws 4, the upper plate 1 and the mold core 3 are assembled by shaft hole matching, specifically: a plurality of spaced mounting holes 5 (such as Figure 2 ), the mounting holes 5 correspond to the mold core 3 one by one, and the mold core 3 can be detachably installed in the mounting holes 5. The detachable upper plate 1 and the mold core 3 can be individually replaced and repaired when the single-hole mold core 3 is dirty or damaged, thereby reducing the maintenance time when the entire plate is dirty. The fixing screws 4 correspond to the mold core 3 one by one, and the fixing screws 4 pass through the lower surface of the lower plate 2 and are connected to the bottom of the mold core 3 by threads; the top of the mold core 3 is plated with a nickel-phosphorus alloy coating of 200 to 500um, and the aspheric lens is made of the nickel-phosphorus alloy coating and processed by a single-point diamond lathe. Refer to Figure 3 The lower plate 2 is provided with a countersunk hole 11, and the fixing screw 4 is connected to the bottom of the second portion 8 through the countersunk hole 11, and the screw head of the fixing screw 4 is located in the countersunk hole 11. In this embodiment, the mounting hole 5 is coaxial with the countersunk hole 11.

[0035] Reference Figure 4 The mold core 3 includes a stepped first portion 7 and a second portion 8. An aspherical lens is placed on the top of the first portion 7. The bottom of the first portion 7 is fixedly connected to the top of the second portion 8. The bottom of the second portion 8 is threadedly connected to the fixing screw 4. The cross section of the second portion 8 is non-circular. Figure 5 , 6 The cross section of the second portion 8 is a D-shaped cross section formed by cutting the edges of a circular cross section, and the cross section of the first portion 7 is circular. In this embodiment, the mounting hole 5 is stepped, and the mounting hole 5 cooperates with the mold core 3. The mounting hole 5 includes a first hole 9 and a second hole 10 that are connected. The first portion 7 is located in the first hole 9, and the second portion 8 is located in the second hole 10, and the second hole 10 is cut out of 0.2mm for limiting. At the same time, the second portion 8 of the mold core 3 is designed with a 0.4mm cutting edge to cooperate with the mounting hole 5, which can play a limiting role when the mold core 3 rotates or slips during the locking process.

[0036] The top plane of the first portion 7 is flush with the upper surface of the upper plate 1 , and more preferably, the error between the top plane of the first portion 7 and the upper surface of the upper plate 1 is less than 2 μm.

[0037] In order to increase the flexibility of the use of the mold core 3, refer to Figure 8 An adjusting gasket 6 is provided between the bottom of the second portion 8 and the upper surface of the lower plate 2. The adjusting gasket 6 is sleeved on the fixing screw 4. During assembly, the thickness of the gasket 6 is adjusted to make the height of the core 3 consistent with that of the upper plate 1, thereby ensuring the error between the plane of the core 3 and the plane of the upper plate 1, that is, the thickness of the upper plate 1 is equal to the sum of the height of the core 3 and the height of the adjusting gasket 6.

[0038] The upper plate 1 and the lower plate 2 are detachably connected. In this embodiment, the upper plate 1 and the lower plate 2 are connected by bolts. Fig. 9 The upper plate 1 is provided with a threaded blind hole, the lower plate 2 is provided with a threaded countersunk hole 11 penetrating the lower plate 2, and the bolts are connected to the upper plate 1 and the lower plate 2 through the threaded countersunk hole 11 and the threaded blind hole. Other forms of threaded connection or pin connection are also possible, as long as the plate surface is flat.

[0039] Take the distance between two adjacent aspheric lenses as an example, which is 7mm. Figure 7 , 8 9. The use process of the WLO lens processing mold of the utility model is as follows:

[0040] S1, making aspherical optical features of the mold core 3 and the top of the first portion 7 of the mold core 3;

[0041] S2, install the mold core 3 into the mounting hole 5 from the bottom of the upper plate 1, and make the first part 7 located in the first hole 9, and the second part 8 located in the second hole 10;

[0042] S3, placing the adjusting gasket 6 in the second hole 10 so that the upper surface of the first portion 7 is flush with the upper surface of the upper plate 1;

[0043] S4, assemble the upper plate 1 and the lower plate 2, and then use the fixing screws 4 to fix the bottom of the mold core 3 from the countersunk hole 11 of the lower plate 2, and fix the upper plate 1 and the lower plate 2 at the same time.

[0044] The utility model discloses a WLO lens processing mold which can realize the mass production of large-sized WLO lenses. By increasing the number of mold core 3 holes, the number of lenses that can be produced on the wafer is increased, thereby reducing the cost. During the initial verification, a small number of mold cores 3 can be produced separately for design verification; during the production process and later maintenance, the mold core 3 can be replaced separately for abnormal or damaged lenses, thereby greatly reducing the maintenance cost.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and replacements, and these modifications and replacements are also within the scope of protection covered by the claims.

Claims

1. A WLO lens processing mold, characterized in that: The invention comprises an upper plate (1), a lower plate (2), a plurality of mold cores (3) and a plurality of fixing screws (4); the upper plate (1) and the lower plate (2) are detachably connected, and the upper plate (1) and the mold core (3) are assembled by shaft hole matching; the fixing screws (4) correspond to the mold core (3) one by one, and the fixing screws (4) penetrate the lower plate (2) from the lower surface of the lower plate (2) and are threadedly connected to the bottom of the mold core (3); the top of the mold core (3) is plated with a nickel-phosphorus alloy coating, and the aspheric lens is processed from the nickel-phosphorus alloy coating.

2. The WLO lens processing mold according to claim 1, characterized in that: The upper plate (1) is provided with a plurality of spaced mounting holes (5), the mounting holes (5) correspond to the mold cores (3) one by one, and the mold cores (3) can be detachably mounted in the mounting holes (5).

3. The WLO lens processing mold according to claim 2, characterized in that: The mold core (3) comprises a first part (7) and a second part (8) in a stepped shape, an aspheric lens is placed on the top of the first part (7), the bottom of the first part (7) is fixedly connected to the top of the second part (8), and the bottom of the second part (8) is threadedly connected to a fixing screw (4); the mounting hole (5) is in a stepped shape, the mounting hole (5) and the mold core (3) cooperate with each other, the mounting hole (5) comprises a first hole (9) and a second hole (10) which are connected, the first part (7) is located in the first hole (9), and the second part (8) is located in the second hole (10).

4. The WLO lens processing mold according to claim 3, characterized in that: The cross section of the second portion (8) is non-circular.

5. The WLO lens processing mold according to claim 4, characterized in that: The cross section of the second portion (8) is a D-shaped cross section formed by cutting a circular cross section.

6. The WLO lens processing mold according to claim 3, characterized in that: The top plane of the first part (7) is flush with the upper surface of the upper plate (1).

7. The WLO lens processing mold according to claim 6, characterized in that: The error between the top plane of the first part (7) and the upper surface of the upper plate (1) is less than 2 μm.

8. The WLO lens processing mold according to claim 3, characterized in that: An adjusting gasket (6) is arranged between the bottom of the second part (8) and the upper surface of the lower plate (2), and the adjusting gasket (6) is sleeved on the fixing screw (4).

9. The WLO lens processing mold according to claim 3, characterized in that: The lower plate (2) is provided with a countersunk hole (11), and the fixing screw (4) is connected to the bottom of the second part (8) through the countersunk hole (11), and the screw head of the fixing screw (4) is located in the countersunk hole (11).

10. The WLO lens processing mold according to claim 8, characterized in that: The mounting hole (5) is coaxial with the counterbore (11).

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