TW201544867A - Contact lenses and manufacturing method thereof - Google Patents

Abstract

Contact lenses and a manufacturing method thereof are disclosed. The contact lenses include: an optical body and a metallic grid arranged inside the optical body. The metallic grid has multiple metallic thin film lines that are parallel to each other, in which the metallic thin film lines define a grid surface so as to reflect polarized lights parallel to the grid surface, furthermore, to penetrate the polarized lights perpendicular to the grid surface.

Description

Contact lens and method of manufacturing same

The present invention relates to a contact lens and a method of manufacturing the same, and more particularly to a contact lens having a metal grid and a method of manufacturing the same.

Contact lenses have been used as a product to improve vision since the 1950s. At present, there are contact lenses made of various materials on the market, and millions of people wear contact lenses as the main method of vision correction. In addition, contact lenses that selectively block specific wavelengths of light, including blocking blue light wavelengths to prevent or slow cataract formation, have been disclosed. Contact lenses that have been dyed to improve handling or provide a decorative effect have also been disclosed. Photochromic contact lenses have also been disclosed for reducing the intensity of light in glare and bright sunlight.

Taiwan Patent Publication No. 201202781 discloses a contact lens for reducing indoor glare, the contact lens comprising a central annular region centered on a geometric center of the lens and having a diameter of from about 1 to about 9 mm, and a peripheral region, wherein the central region The annular region has a percent penetration between about 70 and about 90% at body temperature in the range of 420-700 nm. However, the patent's previous case is to achieve absorption of different spectra through different dye addition concentrations. The patent is not reflective glare, so it absorbs light and generates heat.

Therefore, there is a need to provide a contact lens that can solve the aforementioned problems.

It is an object of the present invention to provide a contact lens having a metal grid.

According to the above objective, the present invention provides a contact lens comprising: an optical body; and a metal grid disposed in the optical body and including a plurality of a metal film line parallel to each other, wherein the metal film lines define a gate surface for reflecting light in a polarization state parallel to the gate surface and for penetrating polarization perpendicular to the gate surface State of light.

The contact lens of the invention is a novel invention, which has the structural design of the metal grid, so as to achieve the reflection polarizing effect, and no large chemical composition causes damage to the human body. In addition to reflecting glare, it has a certain light transmission. The structure of the metal grid can be an interlayer to prevent the hand from touching the metal grid when worn, and being filled with water or oil stains will affect its performance. The invention has the following features: 1. The reflective polarizing effect reduces the damage of sunlight to the eyeball. 2. Increase the user's appearance without wearing extra glasses. 3. Reflective polarizing effect can reduce the heat energy generated by the absorption source.

100‧‧‧Contact lenses

102‧‧‧ eyeballs

110‧‧‧ optical ontology

111‧‧‧First Ontology

112‧‧‧Second ontology

113‧‧‧ concave surface

114‧‧‧ convex surface

115‧‧‧ Lower half

116‧‧‧ upper half

120‧‧‧Metal grid

121‧‧‧Metal film line

122‧‧‧ gate surface

130‧‧‧Unpolarized light

132‧‧‧Horizontal polarized light

134‧‧‧Vertically polarized light

H‧‧‧ Height

S100~S120‧‧‧Steps

W1~W3‧‧‧Width

1 is a schematic cross-sectional view of a contact lens in accordance with an embodiment of the present invention.

2 is a front elevational view of a contact lens in accordance with an embodiment of the present invention.

3 is a partial perspective view of a contact lens in accordance with an embodiment of the present invention showing reflective horizontally polarized light and penetrating vertically polarized light.

4 is a schematic cross-sectional view of a contact lens according to an embodiment of the present invention, showing the contact lens for wearing on an eyeball.

5 is a flow chart of a method of manufacturing a contact lens according to an embodiment of the present invention.

6 and 7 are schematic cross-sectional views showing a method of manufacturing a contact lens according to an embodiment of the present invention.

The above described objects, features, and characteristics of the present invention will become more apparent from the aspects of the invention.

1 is a schematic cross-sectional view of a contact lens according to an embodiment of the present invention, and FIG. 2 is a front view of a contact lens according to an embodiment of the present invention. Referring to FIGS. 1 and 2 , the contact lens 100 includes an optical body 110 and a metal grid 120 . The metal gate 120 is disposed in the optical body 110 and includes a plurality of metal thin film wires 121, and the metal thin film wires 121 are parallel to each other. Please refer to Figure 3, the metal films Line 121 defines a gate surface 122 for reflecting light in a polarization state parallel to the gate surface 122 when a non-polarized light 130 is incident on the gate surface 122 (ie, horizontally polarized light 132: s polarization) and is used to penetrate light in a polarization state perpendicular to the gate surface 122 (ie, vertically polarized light 134: p polarization).

Referring to FIG. 1 , the optical body 110 includes a first body 111 and a second body 112 . The metal gate 120 is disposed on the first body 111 , and the second body 112 covers the metal gate 120 and the first A body 111. The metal film lines 121 have a width W1 of 100 to 200 nm, and can effectively reflect light in a polarization state parallel to the gate surface 122 (having a wavelength of 400 to 700 nm). The metal thin film wires 121 may be made of silver. The optical body 110 can be made of glass, polymethyl methacrylate (PMMA), gas permeable semi-rigid lens (RGP), polyhydroxyethyl methacrylate (HEMA), silicone hydrogel, or the like.

In detail, the first body 111 includes a plurality of strip-shaped concave surfaces 113 and a plurality of strip-shaped convex surfaces 114. The strip-shaped concave surfaces 113 and the strip-shaped convex surfaces 114 are sequentially arranged, and the metal thin film lines are disposed on The strip-shaped convex surfaces 114 are disposed on the strips, and the second body 112 covers the metal thin film lines 121 and the strip-shaped concave surfaces 113. The concave-convex structure plus the double-layer structure (the inner dielectric material and the outer metal material) can increase the transmittance of the vertically polarized light, and at the same time, the blocking effect on the horizontally polarized light is also enhanced, especially the strip-shaped convex surfaces. When the height H of 114 is 100 to 300 nm, the best effect can be obtained. The widths W2 of the strip-shaped convex surfaces 114 may be 100-200 nm, and the strip-shaped concave surfaces 113 may have a width of 100-200 nm.

Referring to FIG. 4, the contact lens 100 is used to be worn on an eyeball 102, and the metal film wires 121 are substantially parallel to each other in a horizontal direction. The optical body 110 includes an upper half 116 and a lower half 115. The weight of the lower half 115 is greater than the weight of the upper half 116, so that the optical body 110 has an asymmetrical structural design. For example, by designing the thickness of the lower half 115 to be greater than the thickness of the upper half 116, the weight of the lower half 115 is greater than the weight of the upper half 116. Since the optical body 110 has an asymmetrical structural design, it can be automatically transferred to the correct direction of the eyeball 102 by gravity and weight balance after wearing. Furthermore, the optical book The asymmetrical structure of the body 110 is optically compatible with the asymmetry of the eyeball 102, and is optimized for aberration correction.

The contact lens of the invention is a novel invention, which has the structural design of the metal grid, so as to achieve the reflection polarizing effect, and no large chemical composition causes damage to the human body. In addition to reflecting glare, it has a certain light transmission. The structure of the metal grid can be an interlayer to prevent the hand from touching the metal grid when worn, and being filled with water or oil stains will affect its performance. The invention has the following features: 1. The reflective polarizing effect reduces the damage of sunlight to the eyeball. 2. Increase the user's appearance without wearing extra glasses. 3. Reflective polarizing effect can reduce the heat energy generated by the absorption source.

5 is a flow chart of a method of manufacturing a contact lens according to an embodiment of the present invention. The extrusion method comprises the following steps:

In step S100, referring to FIG. 6, a first body 111 is formed. For example, by using an injection molding process (the inner surface of the injection molding die has a plurality of strip-shaped concave surfaces and a plurality of strip-shaped convex surfaces, not shown), the first body 111 can be transferred to form a plurality of The strip-shaped concave surface 113 and the plurality of strip-shaped convex surfaces 114 have a microstructure, and the strip-shaped concave surface 113 and the strip-shaped convex surface 114 are sequentially arranged.

In step S110, referring to FIG. 7, a metal gate 120 is disposed on the first body 111. For example, a plurality of metal thin film wires 121 of the metal gate 120 are formed on the strip-shaped convex surfaces 114 by a sputtering, lithography, and etching process.

In step S120, a second body 112 covers the metal gate 120 and the first body 111, as shown in FIG. For example, the second body 112 covers the metal film lines 121 of the metal gate 120 and the strip-shaped concave surfaces 113 of the first body 111 by using another injection molding process. The first body 111 and the second body 112 are combined into an optical body 110. The metal gate 120 is disposed in the optical body 110. The metal film lines 121 of the metal gate 120 are parallel to each other, and the metal film lines 121 are defined. a gate surface for reflecting light in a polarization state parallel to the gate surface and for transmitting light in a polarization state perpendicular to the gate surface.

In addition, the injection molding process may include forming trimming and water testing. quality. The molding trimming is carried out in a high-clean room such as 100,000 grades, so that the edge of the lens has a high smoothness. Then, the lens is hydrated by the mold release liquid and then peeled off from the mold. Finally, the lens quality inspection, lens sterilization and packaging shipment are carried out.

In summary, the present invention is only described as a preferred embodiment or embodiment of the technical means for solving the problem, and is not intended to limit the scope of the invention. That is, the equivalent changes and modifications made in accordance with the scope of the patent application of the present invention or the scope of the invention are covered by the scope of the invention.

100‧‧‧Contact lenses

102‧‧‧ eyeballs

110‧‧‧ optical ontology

115‧‧‧ Lower half

116‧‧‧ upper half

120‧‧‧Metal grid

121‧‧‧Metal film line

Claims (10)

A contact lens comprising: an optical body; and a metal grid disposed in the optical body and comprising a plurality of metal film lines, wherein the metal film lines are parallel to each other, wherein the metal film lines define a gate surface, Light that is polarized in a state parallel to the surface of the gate and that transmits light in a polarization state perpendicular to the surface of the gate. The contact lens of claim 1, wherein the optical body comprises a first body and a second body, the metal gate is disposed on the first body, and the second body covers the metal grid and the The first body. The contact lens of claim 2, wherein the first body comprises a plurality of strip-shaped concave surfaces and a plurality of strip-shaped convex surfaces, the strip-shaped concave surfaces and the strip-shaped convex surfaces are sequentially arranged, The metal film line is disposed on the strip-shaped convex surfaces, and the second body covers the metal film lines and the strip-shaped concave surfaces. The contact lens of claim 3, wherein the strip-shaped convex surfaces have a width of 100 to 200 nm, the strip-shaped convex surfaces have a height of 100 to 300 nm, and the strip-shaped concave surfaces have a width of 100~200nm. The contact lens of claim 1, wherein the metal film lines have a width of 100 to 200 nm. The contact lens of claim 1, wherein the metal film wires are made of silver. The contact lens of claim 1, wherein the contact lens is for wearing on an eyeball, and the metal film wires are substantially parallel to each other in a horizontal direction. The contact lens of claim 7, wherein the optical body comprises an upper half and a lower half, the lower half having a weight greater than the weight of the upper half. The contact lens of claim 8, wherein the thickness of the lower half is greater than the thickness of the upper half. A method for manufacturing a contact lens, comprising the steps of: forming a first body; disposing a metal grid on the first body; and covering a metal body and the first body with a second body; wherein the first body and The second body is combined into an optical body. The metal gate is disposed in the optical body. The metal gate comprises a plurality of metal film lines. The metal film lines are parallel to each other. The metal film lines define a gate surface for reflecting. Light in a polarized state parallel to the surface of the gate and used to penetrate light in a polarization state perpendicular to the surface of the gate.