A method for preparing optical VR lenses

Abstract

The invention discloses a method for preparing an optical VR lens, including punching and molding of a composite plate; hardening treatment of the composite plate; film printing; UV transfer hardening of the film; nano-coating of the film and printing of ink; laser cutting of a transparent camera hole on the film; lamination and molding of the composite plate and the film; and optical nano-coating of the camera hole. The optical VR lens of the invention has high hardness and wear resistance on the outer surface, and can realize optical imaging without distortion when the camera penetrates, and the local color of the inner surface changes and increases the grating gloss. The product meets the optical penetration requirements and realizes different colors and grating phantoms.

Description

Technical Field

[0001] The present invention relates to the technical field of optical VR lenses, and in particular to a method for preparing an optical VR lens. Background Art

[0002] Currently, all VR face shells on the market are ordinary injection molded. Due to process limitations, their surface hardness is low, wear resistance is poor, and the material is limited to yellowing due to ultraviolet aging. They all use colored materials that do not have optical grades and are single in color without color texture. They cannot meet the novel creativity of designers and cannot meet market needs. Summary of the invention

[0003] The purpose of the present invention is to provide a method for preparing an optical VR lens, which can achieve non-distortion of optical imaging when a camera penetrates, local color changes on the inner surface, and increased grating gloss. The product meets the optical penetration requirements and achieves different colors and grating phantoms.

[0004] To achieve the above object, the technical solution adopted by the present invention is: a method for preparing an optical VR lens, comprising the following steps:

[0005] S1) Punching and forming of composite sheet;

[0006] S2) Hardening treatment of composite plate;

[0007] S3) membrane printing;

[0008] S4) UV transfer hardening of film;

[0009] S5) Nano-coating of membrane and printing of ink;

[0010] S6) laser cutting a transparent camera hole in the diaphragm;

[0011] S7) laminating and forming the composite sheet and the diaphragm;

[0012] S8) Camera hole optical nano coating.

[0013] As a further optimization, the inner surface of the composite board in S1 is made of PC material, and the outer surface is made of PMMA material.

[0014] As a further optimization, the hardening treatment in S2 is to treat the outer surface of the composite board with a hardening liquid, wherein the hardening liquid includes polyurethane acrylate and an initiator, and the mass ratio of the polyurethane acrylate and the initiator is 100:(3-8); the thickness of the coating after hardening is 6-12 μm.

[0015] As a further optimization, S3 performs logo printing and offset printing on the diaphragm.

[0016] As a further optimization, the UV transfer glue in S4 includes acrylate, reactive diluent and photoinitiator, the mass ratio of acrylate, reactive diluent and photoinitiator is (70-90):(10-30):(0.2-10), and the UV transfer curing thickness is 7-11 μm.

[0017] As a further optimization, the thickness of the coating layer in S5 is stacked as follows: element zirconium base 8-10nm, element indium 18-22nm, element tin 18-22nm, element niobium 15-18nm, element silicon 12-13nm.

[0018] As a further optimization, the printing ink in S5 includes printing toning ink and IR ink.

[0019] As a further optimization, the printing ink in S5 includes three layers of printing ink. The first layer of ink includes: black oil, PBD-1018 additive, curing agent and diluent, and the mass ratio of the four is 100:3:10:(10-15); the second layer of ink includes: black oil, PBD-1018 additive, curing agent and diluent, and the mass ratio of the four is 100:3:10:(10-15); the third layer of ink includes: matt black, 9425 additive, curing agent and diluent = 100:3:10:(10-15).

[0020] As a further optimization, S7 uses a heated silicone contour glue head laminating machine, and the film baking conditions are: temperature 210°C, time 20S, laminating pressure 125kg, and holding time 20s.

[0021] As a further optimization, the thickness of the coating layer in S8 is stacked: 8-10nm for elemental zirconium base and 35-40nm for elemental titanium.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] The present invention adopts PC+PMMA extruded sheet material, which is formed by hot bending and high pressure, and the outer surface is hardened twice, so that the hardness level is increased to above 4H, and the wear resistance level is increased to 2500 times;

[0024] The present invention has both optical grade functions, which can realize the camera penetrating optical imaging without distortion, and the local color change of the inner surface and increase of grating gloss, so that the product can meet the optical penetration requirements and satisfy the designer's creativity of different colors and grating phantoms, increase the creativity of appearance, and greatly improve the market demand for high-end products. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The figure is a flow chart of the preparation of the optical VR lens of the present invention.

[0026] Figure 2Schematic diagram of the optical VR lens of the present invention. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0028] like Figure 1 As shown, a method for preparing an optical VR lens comprises the following steps:

[0029] Composite panel processing:

[0030] Hot bending forming: The cut material is subjected to hot bending forming process.

[0031] Molding pressure 32Kg, pressurizing time 4-6s, heating temperature 340-370℃, heating time 30-33s;

[0032] Hardening treatment: harden the material after hot bending, the hardening liquid includes polyurethane acrylate and initiator, the mass ratio of polyurethane acrylate and initiator is 100:5; the thickness of the hardened coating is 5-15μm; the IR baking conditions are baking temperature 60-70℃, baking time 5-10min, and the UV light curing conditions are curing energy 400-600mJ, and curing time 10-20s;

[0033] CNC machining of skirt: The hardened material is processed by CNC machine tool;

[0034] Diaphragm processing:

[0035] Printing Logo: ink IPX-HF (LV) 610 ink color white: 106 curing agent: F-003 solvent = 100:14:10, baking temperature 85℃, baking time 30min;

[0036] Offset printing: Use UV ink and print gradient colors in color sequence;

[0037] UV transfer hardening: Use texture mold and UV glue to transfer pattern. UV glue includes acrylate, reactive diluent and photoinitiator. The coating light curing energy is 1200-1500mJ, the curing time is 5-10s, and the coating thickness is 7-11μm.

[0038] Nano coating: using elemental silicon, indium, tin and niobium as target materials for coating, to enhance the brightness of the texture and achieve a semi-reflective and semi-transparent effect. The thickness of the coating layer is stacked: elemental zirconium base 8-10nm, elemental indium 18-22nm, elemental tin 18-22nm, elemental niobium 15-18nm, elemental silicon 12-13nm, ion source time 75±5S, line speed 5M / min, magnetron line current 0.4A;

[0039] Printing ink: First use the toning ink to achieve the required appearance color, and then print the matte ink to achieve the required surface dyne value;

[0040] Printing IR ink: Use invisible infrared penetrating ink to achieve the required IR wavelength transmittance;

[0041] Radical cutting of transparent camera hole;

[0042] Post-lamination processing:

[0043] The diaphragm and the primary CNC shape product are 3D bonded through the equipment;

[0044] CNC machine processing: the bonded materials are processed by CNC machine tools;

[0045] Optical nano-coating: Use elemental silicon, titanium and other target materials for coating to increase the transmittance of the camera hole from 91% to 94%.

[0046] like Figure 2 As shown in the figure, the transmittance of the processed optical VR lens is 30% in the semi-transparent area, 85% in the IR area, and greater than 91% in the camera area. Its performance indicators are as follows:

[0047] Surface pencil hardness: 5-6H / 1kg;

[0048] Surface wear resistance: ≥5000 times / 1000g;

[0049] Impact resistance: ≥0.5J;

[0050] Bending resistance: ≥45°;

[0051] Camera aperture 550 wavelength;

[0052] The coating layer can withstand boiling in 98℃ water for 1 hour without falling off;

[0053] The coating layer is acid-resistant (acidic pH=3.4-4.0) and alkali-resistant (alkaline pH=11.0), and the coating will not fall off after being immersed for 24 hours;

[0054] The coating is non-conductive, and the resistance value within 1CM spacing is greater than 500 megohms;

[0055] Acid salt spray test (pH=3.0) after 24 hours, the coating did not fall off;

[0056] The coating layer can withstand boiling in 98℃ water for 1 hour without falling off.

[0057] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A method for preparing an optical VR lens, characterized in that: The steps include: S1) punching and forming the composite sheet, wherein the inner surface of the composite sheet is made of PC material and the outer surface is made of PMMA material, wherein the forming is to subject the cut material to a hot bending forming process, with a forming pressure of 32 kg, a pressurizing time of 4-6 s, a heating temperature of 340-370° C., and a heating time of 30-33 s; S2) Hardening treatment of the composite sheet: hardening the material after hot bending, the hardening liquid includes polyurethane acrylate and initiator, the mass ratio of polyurethane acrylate and initiator is 100:5, the thickness of the hardened coating is 5-15μm, the IR baking condition is a baking temperature of 60-70°C, a baking time of 5-10min, and the UV light curing condition is a curing energy of 400-600mJ, and a curing time of 10-20s; S3) membrane printing; S4) Film UV transfer hardening; S5) Nano-coating of membrane and printing of ink; S6) laser cutting a transparent camera hole in the diaphragm; S7) laminating and forming the composite sheet and the diaphragm; S8) Camera hole optical nano coating.

2. The method for preparing an optical VR lens according to claim 1, characterized in that: S3 performs logo printing and offset printing on the diaphragm.

3. The method for preparing an optical VR lens according to claim 1, characterized in that: The UV transfer glue in S4 includes acrylate, reactive diluent and photoinitiator, wherein the mass ratio of acrylate, reactive diluent and photoinitiator is (70-90):(10-30):(0.2-10), and the UV transfer curing thickness is 7-11 μm.

4. The method for preparing an optical VR lens according to claim 1, characterized in that: The thickness of the coating layer in S5 is stacked as follows: element zirconium base 8-10nm, element indium 18-22nm, element tin 18-22nm, element niobium 15-18nm, element silicon 12-13nm.

5. The method for preparing an optical VR lens according to claim 1, characterized in that: The printing ink in S5 includes printing toning ink and IR ink.

6. The method for preparing an optical VR lens according to claim 1 or 5, characterized in that: The printing ink in S5 includes three layers of printing ink. The first layer of ink includes: black oil, PBD-1018 additive, curing agent and diluent, and the mass ratio of the four is 100:3:10:(10-15); the second layer of ink includes: black oil, PBD-1018 additive, curing agent and diluent, and the mass ratio of the four is 100:3:10:(10-15); the third layer of ink includes: matt black, 9425 additive, curing agent and diluent = 100:3:10:(10-15).

7. The method for preparing an optical VR lens according to claim 1, characterized in that: S7 uses a heated silicone profiling glue head laminating machine, and the film baking conditions are: temperature 210°C, time 20S, laminating pressure 125kg, and pressure holding time 20s.

8. The method for preparing an optical VR lens according to claim 1, characterized in that: The thickness of the coating layer in S8 is stacked: 8-10nm for elemental zirconium and 35-40nm for elemental titanium.

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