Method for producing an antireflection optical glass and product thereof

Abstract

To provide a processing method for making antireflection optical glass, capable of promoting mass production and increasing an economical value.SOLUTION: A processing method includes steps of: imparting a polishing tool containing a carrier 1 having a plurality of diamond cutting wires 2 formed on the carrier; and polishing elastically an optical glass substrate 3 by centrifugal force by using the polishing tool and forming a plurality of microscopic protrusions or a moth-eye structure, to reduce light reflection from the substrate and increase light transmission on a substrate.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] Relates to a method for creating an antireflective optical glass and its product.

Background Art

[0002] To reduce light reflection in conventional display or monitor screen optical glass, photolithography has been provided for forming a moth-eye structure on the surface of the optical glass to thereby obtain an antireflective optical surface of the optical glass.

[0003] However, conventional photolithography for creating a moth-eye structure has the following drawbacks. 1. The manufacturing cost is very high while its yield rate is low, thereby lacking economic value. 2. An etching solution is used in the photolithography process. Such an etching solution is corrosive and may cause pollution that affects environmental protection. 3. This may be used to produce a flat shape. This is not suitable for creating a moth-eye structure on a curved surface. Therefore, it will be limited to only small-scale manufacturing and is not suitable for mass production of optical glass.

[0004] The inventor has discovered the drawbacks of the conventional processing method and invented the present application's processing method for creating an antireflective optical glass that promotes mass production and increases economic value.

Summary of the Invention

[0005] An object of the present invention is to provide a step of providing a polishing tool including a carrier having a plurality of diamond cutting wires formed on the carrier, and a step of elastically polishing a substrate of an optical glass by the polishing tool by centrifugal force to form a plurality of microscopic protrusions or a moth-eye-like structure on the substrate, thereby reducing light reflection from the substrate and increasing light transmission in the substrate, a processing method for creating an antireflective optical glass.

[0006] Another object of the present invention is to provide a product created by the above-described processing method.

[0007] The present invention will be further described in the following description together with the accompanying drawings.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0009] As shown in FIGS. 1 to 6, the present invention provides a polishing tool for polishing or engraving a substrate 3 of an optical glass, an optical film, or an optical product to form a moth-eye-like structure on the substrate.

[0010] The polishing tool may include a carrier 1 which may be a rotary carrier, and at least a diamond cutting wire 2 formed on the carrier 1. The diamond cutting wire 2 may be formed in a ring shape as shown in FIGS. 1 and 2, or may be in a linear shape as shown in FIG. 7 although not limited in the present invention. In the present invention, a plurality of cutting wires 2 are preferred.

[0011] Carrier 1 may be a rotating carrier having a mandrel 11 formed axially thereon, which is rotatably driven by a motor (not shown) for enabling the diamond cutting wire 2 formed on the carrier 1 to polish or engrave a moss-eye structure on the substrate 3.

[0012] Each diamond cutting wire 2 includes a plurality of diamond particles or beads 21 formed, plated, adhered or connected to the diamond cutting wire.

[0013] As shown in FIG. 3, the height or distance H between the axis Y of the mandrel 11 of the carrier 1 and the substrate 3 may be adjusted during the operation so as to balance the depth of polishing or engraving on the substrate. During the rotation of the carrier 1 and the transfer of the substrate in the advancing direction F driven by a conveyor (not shown), the particles of the cutting wire 2 elastically polish or engrave a plurality of nano-unit grooves on the substrate 3 by centrifugal force to form microscopic protrusions or moss-eye structures on the substrate.

[0014] The acute angle or prism angle of the diamond particles 21 on the cutting wire 2 can efficiently polish or engrave the substrate depending on the hardness of the diamond particles 21. At the same time, during the high-speed rotation of the carrier 1, when rotatably pressed, the centrifugal force from the cutting wire 2 and the spring force will also assist in polishing or engraving the particles 21 on the substrate surface. Therefore, by simply using a light (not heavy) force to rotate the carrier 1 and the cutting wire 2, a plurality of microscopic grooves are engraved on the substrate, thereby forming a moss-eye structure on the substrate 3.

[0015] The substrate 3 includes substrates of mobile or smartphone screens, touch display screens, monitors, lenses, and other optical products.

[0016] Optical glass includes glass, and transparent plastics (or plastic glass) such as polycarbonate (PC) and polyethylene terephthalate (PET).

[0017] As shown in Fig. 7, the diamond cutting wire 2 is formed on the surface portion 12 of the carrier 1. Such a surface portion 12 is made of an elastomer material that functions as an elastic cushion for the diamond cutting wire 2.

[0018] In the present invention, in order to conform to the requirements of the work and the product, there may be a plurality of working parameters that may be optionally adjusted. By adjusting the rotational speed of the carrier 1 and the distance H between the carrier 1 and the substrate 3, the centrifugal force and the spring force of the diamond cutting wire 2 are adjusted, thereby producing a corresponding depth of the engraved groove cut by the wire 2. The engraved groove may be adjusted to match the dimensions of the moth-eye structure. The cutting wire 2 is elastically "pressed" against the substrate surface by centrifugal force and can closely approach the substrate surface, particularly performing a homogeneous engraving operation suitable for the engraved substrate surface.

[0019] The parameters may be optionally adjusted with respect to the dimensions of the product, characteristics, different wavelengths of light, and light transmission of the optical glass.

[0020] After the substrate 3 is engraved to form a moth-eye structure, an anti-reflection surface is provided on the substrate to reduce the reflection of incident light and increase the light transmission through the substrate, thereby providing an anti-glare effect and increasing the efficiency of the optical glass.

[0021] As shown in Figs. 4 to 6, the substrate 3 is transported forward in the advancing direction F, and three carriers 1, particularly the rotating carriers, are respectively installed at three positions A, B, and C of the substrate 3 as described below.

[0022] Position A: The rotating carrier 1 has its own axis Y of the mandrel 11 perpendicular to the longitudinal axis X of the substrate.

[0023] During the rotation of the carrier 1 and the forward drive of the substrate 3, the diamond cutting wire 2 will engrave a plurality of longitudinal grooves 31 parallel to the longitudinal axis X of the substrate.

[0024] Position B: The rotating carrier 1 is currently projected to deviate from the vertical axis X at an obtuse angle of 135 degrees between the mandrel axis Y and the vertical axis X.

[0025] During the rotation of the carrier 1 and the forward drive of the substrate 3, the diamond cutting wire 2 will engrave a plurality of leftward diagonal grooves 32, which will intersect with the vertical grooves 31 cut previously at position A to form primary polygonal protrusions at position B.

[0026] Position C: The rotating carrier 1 is currently projected to deviate from the vertical axis X at an acute angle of 45 degrees between the mandrel axis Y and the vertical axis X.

[0027] During the rotation of the carrier 1 and the forward drive of the substrate 3, the diamond cutting wire 2 will engrave a plurality of rightward diagonal grooves 33 and leftward diagonal grooves 32 that will intersect with the vertical grooves 31, which will form secondary polygonal protrusions at position C, as particularly shown in FIG. 6.

[0028] Of course, the deviation angle of the mandrel 11 with respect to the vertical axis X of the substrate is not limited and can be adjusted optionally according to actual requirements.

[0029] The present invention has the following advantages. 1. The manufacturing apparatus is simple and low-cost. As a result, the processing method of the present invention is suitable for mass production and is rich in commercial value. 2. The diamond particles 21 are firmly fixed to the cutting wire 2 to assist in stabilizing the polishing or engraving operation, increasing the product quality and the product yield rate. 3. By applying a centrifugal force or a spring force that presses the diamond cutting wire 2 onto the substrate surface, polygonal protrusions or moss-eye-like structures are polished more homogeneously on the substrate, and it is particularly suitable for polishing the polished surface of the substrate. 4. The etching solution is not required in this processing method and is beneficial to environmental protection. 5. This processing method is applicable to the manufacture of large-scale optical glass and is more suitable for mass production and an increase in manufacturing capacity. 6. The manufacturing parameters may optionally be adjusted to control the light transmittance corresponding to different lights of different wavelengths, thereby satisfying different optical characteristics of different optical glasses or products.

[0030] The present invention can be further modified without departing from the spirit and scope of the present invention.

Claims

1. Providing a polishing tool including a carrier having a plurality of diamond cutting wires formed thereon, and elastically polishing a substrate of optical glass by the polishing tool by centrifugal force to form a plurality of microscopic protrusions or moss-eye-like structures on the substrate, thereby reducing light reflection from the substrate and increasing light transmission in the substrate, including the steps of The diamond cutting wire includes a plurality of diamond particles formed, plated, adhered, or connected on the diamond cutting wire, and a processing method for creating an antireflective optical glass.

2. The polishing tool includes a rotating carrier and at least a diamond cutting wire formed on the rotating carrier, and the processing method according to claim 1.

3. The diamond cutting wire is formed in a ring shape or a linear shape, and the processing method according to claim 2.

4. The carrier is a rotating carrier having a mandrel formed in the axial direction within the carrier so as to be rotatably driven by a motor to enable the diamond cutting wire formed on the carrier to polish or engrave a moss-eye-like structure on the substrate, and the processing method according to claim 1.

5. The height or distance between the axis of the mandrel of the carrier and the substrate is adjustable during the operation so as to match the depth of polishing or engraving on the substrate. During the rotation of the carrier and the transfer of the substrate in the advancing direction driven by the conveyor, the diamond particles on the diamond cutting wire elastically polish or engrave a plurality of nano-unit grooves of the substrate by centrifugal force, thereby forming the microscopic protrusions or the moss-eye-like structure on the substrate, and the processing method according to claim 4.

6. The substrate includes a screen of a telephone, a screen of a display, a monitor, a lens, and a substrate of an optical product, and the processing method according to claim 1.

7. The optical glass includes glass and transparent plastic glass, and the processing method according to claim 1.

8. The diamond cutting wire is formed on the surface portion of the carrier. The surface portion is made of an elastomer material that functions as an elastic cushion for the diamond cutting wire, and the processing method according to claim 1.

9. The substrate is conveyed forward in the advancing direction, Three carriers including three rotating carriers are configured to be respectively installed at the following first to third positions of the substrate, When the carrier is in the first position, the rotating carrier has an axis on a mandrel itself perpendicular to the longitudinal axis of the substrate. During the rotation of the carrier and the forward drive of the substrate, the diamond cutting wire engraves a plurality of longitudinal grooves parallel to the longitudinal axis of the substrate, When the carrier is in the second position, the rotating carrier deviates from the longitudinal axis in a projection currently at an obtuse angle between the axis of the mandrel and the longitudinal axis. During the rotation of the carrier and the forward drive of the substrate, the diamond cutting wire engraves a plurality of leftward diagonal grooves, thereby intersecting the longitudinal grooves cut previously at the first position to form a primary polygonal protrusion at the second position, When the carrier is in the third position, the rotating carrier deviates from the longitudinal axis in a projection currently at an acute angle between the axis of the mandrel and the longitudinal axis. During the rotation of the carrier and the forward drive of the substrate, the diamond cutting wire engraves a plurality of rightward diagonal grooves that will intersect the longitudinal grooves and the leftward diagonal grooves to form a secondary polygonal protrusion at the third position. The processing method according to claim 4.

Images