Manufacturing method and products of anti-reflective optical glass

Abstract

A method for manufacturing anti-reflective optical glass and its products, wherein the method for manufacturing anti-reflective optical glass involves having several diamond-cut lines on a carrier, and then centrifugally and elastically polishing and grinding the surface of the optical glass with the diamond-cut lines to create moth-eye structure grooves on the surface of the optical glass, thereby reducing light reflection and increasing light transmittance.

Description

Technical Field

[0001] This invention relates to the field of anti-reflective optical glass manufacturing, and in particular to a method for manufacturing anti-reflective optical glass and its products. Background Technology

[0002] It is known that optical glass such as display screens uses photolithography to create an anti-reflective surface with a moth-eye structure in order to reduce light reflection and increase light transmission.

[0003] However, optical glass with a moth-eye structure surface formed by photolithography still has the following drawbacks:

[0004] 1. The production cost is extremely high, the yield rate is low, and it is not economically viable.

[0005] 2. The use of etching solution is highly corrosive and polluting, which is detrimental to environmental protection.

[0006] 3. The manufacturing process has many limitations, such as being suitable only for producing small-sized glass, which must be flat and cannot have curved surfaces. This limits the development and mass production of related optical glass products.

[0007] In view of this, the inventor has conducted research and innovation, revealing a novel method for manufacturing anti-reflective optical glass and its products. Summary of the Invention

[0008] The present invention aims to provide a method for manufacturing anti-reflective optical glass, which involves having several diamond-cut lines on a carrier, and then centrifugally and elastically polishing and grinding the surface of the optical glass with these diamond-cut lines to create moth-eye structure or moth-eye-like grooves on the surface of the optical glass, thereby reducing light reflection and increasing light transmittance. Another object of the present invention includes optical glass products manufactured using this method.

[0009] The desirable aspects of the present invention will become clear from the following description, in conjunction with the accompanying drawings. Attached Figure Description

[0010] Figure 1 This is a partial schematic diagram of the grinding tool used in the manufacture of this invention.

[0011] Figure 2 This is a three-dimensional schematic diagram of the grinding tool and the substrate to be ground according to the present invention.

[0012] Figure 3 This is a cross-sectional schematic diagram of the tools and substrate used in the fabrication of this invention.

[0013] Figure 4This is a schematic diagram of the invention, which uses multi-directional grinding and engraving to create grooves that interweave to form a moth-eye structure.

[0014] Figure 5 for Figure 4 A top-view schematic diagram of the characterization results.

[0015] Figure 6 For self Figure 5 An enlarged oblique view of the circled annotation area.

[0016] Figure 7 This is a schematic diagram of another possible entity of the present invention.

[0017] Explanation of symbols in the attached diagram:

[0018] 1…. Carrier; 11…. Rotating shaft; 12…. Wheel surface; 2…. Diamond cutting line; 21…. Diamond particle; 3…. Optical glass substrate; 31…. First groove; 32…. Second groove; 33…. Third groove; X…. Vertical axis; F…. Forward direction; A, B, C…. Groove display area; H…. Spacing. Detailed Implementation

[0019] See Figures 1-6 The method for manufacturing the anti-reflective optical glass of the present invention mainly involves using a grinding device to grind and engrave on the optical glass to produce optical glass with a moth-eye or moth-eye-shaped structure.

[0020] The grinding device (such as) Figure 1 As shown in Figure 2, the device includes: a carrier 1, which includes a rotating wheel, and at least one or more diamond cutting wires 2 disposed on the carrier to form the grinding device. Each of the diamond cutting wires 2 is attached to the carrier 1 in a loop or similar shape.

[0021] When the carrier 1 is a rotating wheel, its shaft 11 can be driven by a motor to rotate, so that the diamond particles 21 fixed to the diamond cutting lines 2 set on the wheel surface 12 can be ground and engraved on the optical glass substrate 3.

[0022] Each diamond cut line 2 is plated, bonded, connected or set with several diamond grains 21.

[0023] like Figure 3As shown, the carrier 1 is started to rotate, and the distance H or height between the axis of the carrier 1 and the optical glass substrate 3 is adjusted. The optical glass substrate 3 is pushed forward in the F direction by means of a conveyor belt or the like. At this time, the rotating carrier 1, i.e. the wheel, causes the many diamond particles 21 of the diamond cutting line 2 on it to be centrifugally, elastically flung and polished on the surface of the optical glass substrate 3 to form grooves. For example, grooves with a depth of nanometer level can be engraved.

[0024] When the sharp corners or edges on each diamond particle 21 are polished on the optical glass substrate, due to the high hardness of the diamond and the centrifugal force and elastic force of the rotating cutting line, only a slight force is needed to grind and engrave the surface of the optical glass substrate 3 into extremely fine grooves.

[0025] The optical glass substrate 3 can be a mobile phone panel, a touch screen (including ATM), a display surface, a lens surface, or other optical glass surfaces.

[0026] In addition to glass, this optical glass also includes transparent plastics such as polycarbonate (PC).

[0027] Each of the diamond cut lines 2 can also be as follows Figure 7 As shown, it is directly attached to the wheel surface 12 of the carrier 1. The wheel surface 12 can be made of elastomer, thus constituting another desirable entity of the present invention.

[0028] The operation of this invention allows for control of the rotation speed of the carrier 1 to control the "splashing force" (splashing and polishing force) of the diamond cutting wire 2, and to control the density of the engraving marks to correspond with the size of the microstructure and the wavelength of light transmission. It also allows for adjustment of the distance H between the carrier wheel and the optical glass substrate, so that the diamond cutting wire can rotate, centrifuge, and elastically press and fling onto the surface of the optical glass substrate, as if the diamond cutting wire dynamically "fits" onto the surface of the optical glass substrate for grinding and engraving, resulting in uniform engraving marks. It is especially suitable for curved surfaces to effectively perform groove engraving operations.

[0029] The moth-eye or moth-eye-shaped structure, which is engraved, forms an anti-reflective surface on the optical glass surface. This can significantly reduce the reflection of incident light, increase the amount of light transmitted, avoid or reduce glare, and improve the performance of the optical glass.

[0030] like Figures 4-6As shown, the rotating shaft 11 of the carrier 1 is first orthogonal to the longitudinal axis X of the optical glass substrate 3 (as shown at point A). The carrier 1 is rotated so that the diamond cutting line 2 on it grinds and engraves a first groove 31 parallel to the longitudinal axis X on the optical glass substrate 3. The optical glass substrate 3 is then advanced along the direction F. At point B, the rotating shaft 11 of the carrier 1 intersects the longitudinal axis X at a 135-degree angle. The carrier 1 is then rotated so that the diamond cutting line 2 grinds and engraves a second groove 32 at a 45-degree angle to the longitudinal axis X and the first groove 31 on the optical glass substrate 3. The optical glass substrate 3 is then continuously advanced forward in the forward direction F. At point C, the carrier 1 intersects the longitudinal axis X at a 45-degree angle. With rotation, the diamond cutting line 2 engraves a third groove 33 at a 135-degree angle to the first groove 31 on the optical glass substrate 3. As shown at point C, the first, second, and third grooves 31, 32, and 33 intersect each other, thus cutting the substrate into the shape shown at point C. Figure 6 The moth-eye structure 34 shown (Note: A, B, and C are groove display areas).

[0031] This invention can adjust relevant process or operating parameters to modify product size and characteristics and to correspond to different wavelengths of light, thereby controlling the amount of light transmission.

[0032] This invention has the following advantages over many known technologies:

[0033] 1. The entire process and equipment are simple in structure, the production cost is greatly reduced, it is suitable for mass production, and it has great industrial economic value.

[0034] 2. In diamond cutting, the diamond particles do not roll, making the grinding and scoring effects easier to control, which helps to improve quality stability and yield.

[0035] 3. Due to the elasticity of the diamond cutting line and the centrifugal polishing, the engraving marks are uniform, making it particularly suitable for the processing and fabrication of curved surfaces.

[0036] 4. It eliminates the need to use corrosive etching solutions prepared using known methods, offering significant environmental benefits.

[0037] 5. Suitable for the production of large-size optical glass, mass production is possible, and production capacity is large.

[0038] 6. Because the process parameters are easy to adjust, the light transmittance can be controlled according to different wavelengths of light, which is convenient for meeting the needs of different optical properties of various optical glasses.

[0039] The present invention may be modified and changed appropriately without departing from the spirit and scope of the present invention, and the aforementioned grinding and engraving directions may be adjusted and varied without limitation.

Claims

1. A method for manufacturing anti-reflective optical glass, characterized in that, A grinding apparatus grinds and engraves an optical glass substrate to create an optical glass with a moth-eye structure that has an anti-reflective effect. The grinding apparatus includes multiple carriers and several diamond-cut lines disposed on the carriers. Each carrier is a rotating wheel containing a rotating shaft that can be driven to rotate, so that the diamond-cut lines can centrifugally and elastically polish the surface of the optical glass substrate to form a moth-eye structure. Each diamond-cut line on the carrier is composed of several diamond particles disposed on the diamond-cut line. Each diamond-cut line is looped and attached to the carrier. The optical glass substrate advances relative to the multiple carriers in a conveyor belt manner. When one carrier is at a first angle to the optical glass substrate, the diamond-cut lines on the one carrier form a first engraving on the optical glass substrate. When the optical glass substrate advances and forms a second angle with another carrier, the diamond-cut lines on the other carrier form a second engraving on the optical glass substrate. The second engraving and the first engraving form an interlaced engraving structure.

2. The method for manufacturing the anti-reflective optical glass according to claim 1, characterized in that, The distance between the carrier and the diamond-cut lines attached to it and the optical glass substrate can be adjusted.

3. The method for manufacturing the anti-reflective optical glass according to claim 1, characterized in that, The angle between the carrier and the diamond-cut lines on it and the optical glass substrate to be ground and engraved can be adjusted.

4. The method for manufacturing anti-reflective optical glass according to claim 1, characterized in that, The optical glass includes: light-transmitting plastic glass.

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