TWM447501U - Optical structure with both anti-reflective and light condensing functions - Google Patents

Description

Optical structure with anti-reflection and concentrating functions

This creation is about an optical structure that combines anti-reflection and concentrating functions, especially with the sub-wavelength microstructure shape and arrangement design, and can achieve both anti-reflection and concentrating functions.

Press, when the light passes through the transparent substrate, the incident light will be affected by the refractive index of the transparent substrate, and some of the light will reflect. Therefore, general displays, optoelectronic devices, optical communication devices, solar cells and In order to reduce the light reflectivity of the illumination system device, more than the sub-wavelength microstructure of the Moth eye is provided on the transparent substrate, so that the refractive index of the transparent substrate surface gradually changes along the depth direction, Avoid reflections caused by light changes in refractive index.

For example, the "optical element and its manufacturing method" of the Republic of China Publication No. 201129818 mainly includes a substrate and a plurality of structures, wherein the structure has an elastic modulus of 1 MPa or more and 1200 MPa or less, and the foregoing structure The system is disposed on the surface of the substrate, and the structural material includes a convex portion or a concave portion, and the aspect ratio of the convex portion or the concave portion is 0.6 or more and 1.5 or less. However, although the foregoing structural body can be made by the sub-wavelength microstructure. The purpose of reducing the light reflection is achieved, but the light source is not effectively collected, so the practicality is insufficient.

Therefore, in order to improve the shortcomings of the conventional anti-reflection transparent substrate, the inventors have devoted themselves to research and developed an optical structure having both anti-reflection and concentrating functions, including:

a transparent substrate;

An anti-reflective light-transmitting layer is bonded to the transparent substrate, wherein the anti-reflective light-transmitting layer is provided with at least one light collecting region, and the light collecting region is provided with seven sub-wavelength microstructures, wherein the six The sub-wavelength microstructures surround the one of the sub-wavelength microstructures, and the sub-wavelength microstructures have a semi-spherical shape with a center and a circumferential surface, and the center and circumference of the sub-wavelength microstructure The vertical distance defines a height value (H), the maximum distance between the two sides of the circumferential surface defines a diameter value (D), and the distance between the adjacent sub-wavelength microstructures defines a spacing value (S), the height The value (H), the aforementioned diameter value (D), and the aforementioned pitch value (S) are equal to a specific value which is between 0.03 μm and 0.4 μm.

Further, the transparent substrate is a transparent polymer sheet.

Further, the anti-reflection light-transmitting layer is a light-transmitting gel having an inflection rate of 1.49 to 1.70.

Further, the anti-reflection light-transmitting layer is first embossed and then cured by UV curing onto the transparent substrate.

This creation has the following effects:

1. Since the anti-reflection light-transmitting layer is provided on the transparent substrate in the present case, the sub-wavelength microstructure of the anti-reflection light-transmitting layer can gradually change the refractive index along the depth direction of the sub-wavelength microstructure to avoid the light being refracted. The rate changes rapidly and produces a reflection.

2. Since the present invention forms a concentrating body by means of equidistant annular arrangement of sub-wavelength microstructures, the light source can be effectively collected to achieve the function of concentrating light.

In combination with the above technical features, the main effects of the optical construction having both anti-reflection and concentrating functions will be clearly shown in the following embodiments.

Please refer to the first to fourth figures for this creation, including:

A transparent substrate (1) is a transparent polymer sheet such as polymethylmethacrylate (PMMA), polycarbonate (Polycarbonate) or polyester (Polyester).

An anti-reflection transparent layer (2) is bonded to the transparent substrate (1), and the anti-reflection transparent layer (2) is provided with at least one concentrating region (21), and the concentrating region (21) There are seven sub-wavelength microstructures (22), wherein the six sub-wavelength microstructures (22) surround the one of the sub-wavelength microstructures (22), and the sub-wavelength microstructures (22) The system has a semi-spherical shape and has a center (221) and a circumferential surface (222). The vertical distance between the center (221) of the sub-wavelength microstructure (22) and the circumferential surface (222) defines a height value (H). The maximum distance between the two sides of the circumferential surface (222) defines a diameter value (D), and the distance between the adjacent sub-wavelength microstructures (22) defines a spacing value (S), the height value (H) The aforementioned diameter value (D) and the aforementioned pitch value (S) are equal to a specific value, which is between 0.03 μm and 0.4 μm.

Further, the anti-reflection light-transmitting layer (2) is a light-transmitting gel having an inflection rate of 1.49 to 1.70 (for example, OPPEA).

Further, the anti-reflection light-transmitting layer (2) is first embossed and then cured by a UV curing process to form a film on the transparent substrate (1).

With the above configuration, since the anti-reflection light-transmitting layer (2) is provided on the transparent substrate (1), the shape of the sub-wavelength microstructure (22) of the anti-reflection light-transmitting layer (2) can be used to make the refractive index edge The depth direction of the sub-wavelength microstructure (22) is gradually changed to avoid the light from being reflected by the rapid change of the refractive index, and by the equidistant annular arrangement of the sub-wavelength microstructure (22), the light source can be effectively collected. Achieve both anti-reflection and concentrating functions.

In view of the above description of the embodiments, the above-described embodiments are merely a preferred embodiment of the present invention, and the implementation of the present invention is not limited thereto. The scope, that is, the simple equivalent changes and modifications made in accordance with the scope of the patent application and the content of the creation of the creation, are within the scope of this creation.

(1) ‧ ‧ transparent substrate (2) ‧ ‧ anti-reflective light-transmissive layer (21) ‧ ‧ concentrating area (22) ‧ ‧ sub-wavelength microstructure (221) ‧ ‧ center (222) ‧ ‧Circular surface (H) ‧ ‧ height value (D) ‧ ‧ diameter value (S) ‧ ‧ spacing value

The first picture is a three-dimensional exploded view of the creation.

The second picture is a three-dimensional schematic diagram of a part of the creation.

The third picture is a side view and a partial cross-sectional view of the creation.

The fourth picture is a schematic top view of a part of the creation.

(1) ‧‧‧Transparent substrate

(2) ‧‧‧Anti-reflective light transmission layer

(22) ‧‧‧ subwavelength microstructures

(221) ‧‧‧ Center

(222)‧‧‧Circular surface

(H) ‧ ‧ height values

(D) ‧ ‧ diameter values

(S)‧‧‧ spacing value

Claims (4)

An optical structure that combines anti-reflection and concentrating functions, including:
a transparent substrate; and an anti-reflection transparent layer is coupled to the transparent substrate, wherein the anti-reflective light-transmitting layer is provided with at least one light collecting region, and the light collecting region is provided with seven sub-wavelength microstructures Wherein the six sub-wavelength microstructures surround the one of the sub-wavelength microstructures, and the sub-wavelength microstructures are semi-spherical and have a center and a circumferential surface, the sub-wavelength microstructure The vertical distance between the center of the circle and the circumferential surface defines a height value (H), the maximum distance between the two sides of the circumferential surface defines a diameter value (D), and the distance between the adjacent sub-wavelength microstructures and the center of each other defines a spacing value ( S), the height value (H), the diameter value (D), and the pitch value (S) are equal to a specific value, and the specific value is between 0.03 μm and 0.4 μm. An optical structure having both anti-reflection and condensing functions as described in claim 1, wherein the transparent substrate is a transparent polymer sheet. An optical structure having both anti-reflection and concentrating functions as described in claim 1, wherein the anti-reflection light-transmitting layer is a light-transmitting gel having a refractive index of 1.49 to 1.70. An optical structure having an anti-reflection and concentrating function as described in claim 1, wherein the anti-reflection light-transmitting layer is embossed and then cured by UV curing on the transparent substrate. on.