Method for preparing double-sided concave-convex micro-lens array based on glass molded glass

Abstract

The invention discloses a method for preparing a double-sided concave-convex micro-lens array based on molded glass. The method comprises the following steps: step 1, determining the design size of the double-sided concave-convex micro-lens array; 2, selecting a lower mold matched with the double-sided concave-convex micro-lens array, and carrying out mold pressing on high-melting-point glass on the lower mold to form an upper mold; 3, putting low-melting-point glass into the lower mold, and pressing the low-melting-point glass to a designed position by adopting the upper mold to obtain the double-sided concave-convex micro-lens array; according to the method, the upper die which is the same as the concave part of the lower die is manufactured, so that the convex part formed by the upper die is completely matched with the concave part of the lower die, the alignment error of the double-sided micro-lens array caused by die difference is eliminated, the beam shaping effect of the double-sided micro-lens array is improved, the service life of the die is prolonged, and the production cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of double-sided microlens arrays, and in particular to a method for preparing a double-sided concave-convex microlens array based on glass molded glass. Background Art

[0002] The commonly used double-sided glass microlens array for beam shaping is generally a double convex microlens array, which is prepared by glass molding technology. Since the double-sided microlens array requires two molds to act simultaneously during the molding process, and the two molds themselves also have manufacturing errors, the double-sided microlens array will produce a larger alignment error due to mold inconsistency during the molding process, thereby reducing the beam shaping effect of the double-sided microlens array.

[0003] The existing glass double-sided microlens array molding technology requires the upper mold core and the lower mold core to be molded at the same time. The microlens array structures of the two mold cores have position errors during the processing. Due to the differences between the two molds, the alignment accuracy of the microlens arrays on both sides of the double-sided microlens array will decrease during the molding, resulting in a decrease in the beam shaping effect. At the same time, this method has very high requirements on the precision of the two microlens array molds, which greatly increases the manufacturing cost.

[0004] In order to solve the above problems, the present invention provides a method for preparing a double-sided concave-convex microlens array based on glass molded glass, so as to solve the problem of low precision and high cost in the previous double-sided microlens manufacturing. Summary of the invention

[0005] The purpose of the present invention is to provide a method for preparing a double-sided concave-convex microlens array based on glass molded glass, so as to improve the manufacturing accuracy of the double-sided microlens and save costs.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] A method for preparing a double-sided concave-convex microlens array based on glass molded glass, comprising the following steps:

[0008] Step 1: Determine the design size of the double-sided concave-convex microlens array;

[0009] Step 2: selecting a lower mold that matches the double-sided concave-convex microlens array and pressing a high-melting-point glass on the lower mold to form an upper mold;

[0010] Step three: Put low melting point glass into the lower mold and use the upper mold to press it down to the designed position to obtain the double-sided concave-convex microlens array.

[0011] Preferably, the upper mold is made of metal.

[0012] Preferably, the specific method of making the upper mold in step 2 is as follows:

[0013] Heat and soften high melting point glass;

[0014] Molding the low-high-point glass onto the lower mold;

[0015] Pressure holding annealing;

[0016] After cooling and demoulding, the upper mold is obtained.

[0017] Preferably, the low melting point glass is PMMA or PC.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] 1. The present invention manufactures an upper mold that is identical to the concave portion of the lower mold, so that the convex portion formed by the upper mold is completely matched with the concave portion of the lower mold, thereby eliminating the double-sided microlens array alignment error caused by mold differences, improving the double-sided microlens array beam shaping effect, increasing mold life, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The purpose of the present invention is to provide a method for preparing a double-sided concave-convex microlens array based on glass molded glass, so as to improve the manufacturing accuracy of the double-sided microlens and save costs.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] refer to Figure 1A method for preparing a double-sided concave-convex microlens array based on glass molded glass comprises the following steps:

[0026] Step 1: Determine the design size of the double-sided concave-convex microlens array;

[0027] Step 2: selecting a lower mold that matches the double-sided concave-convex microlens array and pressing a high-melting-point glass on the lower mold to form an upper mold;

[0028] Step 3: Put low melting point glass into the lower mold and use the upper mold to press it down to the designed position to obtain the double-sided concave-convex microlens array.

[0029] Furthermore, the upper mold is made of metal.

[0030] Furthermore, the specific method of making the upper mold in step 2 is as follows:

[0031] Heat and soften high melting point glass;

[0032] Molding the high melting point glass onto the lower mold;

[0033] Pressure holding annealing;

[0034] After cooling and demoulding, the upper mold is obtained.

[0035] Furthermore, the low melting point glass is PMMA or PC.

[0036] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0037] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A method for preparing a double-sided concave-convex microlens array based on glass molded glass, characterized in that: The following steps are involved: Step 1: Determine the design size of the double-sided concave-convex microlens array; Step 2: selecting a lower mold that matches the double-sided concave-convex microlens array and pressing a high-melting-point glass on the lower mold to form an upper mold; Step three: Put low melting point glass into the lower mold and use the upper mold to press it down to the designed position to obtain the double-sided concave-convex microlens array.

2. The method for preparing a double-sided concave-convex microlens array based on glass molded glass according to claim 1, characterized in that: The upper mold is made of metal.

3. The method for preparing a double-sided concave-convex microlens array based on glass molded glass according to claim 1, characterized in that: The specific method of making the upper mold in step 2 is as follows: Heat and soften high melting point glass; Molding the high melting point glass onto the lower mold; Pressure holding annealing; After cooling and demoulding, the upper mold is obtained.

4. The method for preparing a double-sided concave-convex microlens array based on glass molded glass according to claim 3, characterized in that: The low melting point glass is PMMA or PC.

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