KR-20260065226-A - Optical lens and method for manufacturing the same

KR20260065226AKR 20260065226 AKR20260065226 AKR 20260065226AKR-20260065226-A

Abstract

An optical lens according to an embodiment comprises a lens portion having a flange portion and an optical portion, and a light-blocking layer disposed on the surface of the flange portion and on the side of the optical portion, wherein the flange portion includes a curved surface and a flat surface forming the side of the lens portion, and the light-blocking layer has a first light-blocking area disposed on the surface of the flange portion and a second light-blocking area disposed on the flat surface, and the first light-blocking area and the second light-blocking area may be connected to each other.

Inventors

김지민
김민석
김가연

Assignees

엘지이노텍 주식회사

Dates

Publication Date: 20260508
Application Date: 20241101

Claims (6)

A lens portion having a flange portion and an optical portion; and A light-blocking layer disposed on the upper surface of the flange portion and on the side of the optical portion; comprising The above flange portion includes a curved surface and a flat surface forming the side of the lens portion, and The light-blocking layer has a first light-blocking area disposed on the surface of the flange portion and a second light-blocking area disposed on the flat surface, and The first light-blocking region and the second light-blocking region are connected to each other in an optical lens.
In Article 1, It includes a corner portion connecting the flat surface, the flange portion, and the optical portion, The light-blocking layer is an optical lens having an edge light-blocking area disposed at the corner portion.
In Article 2, The light-blocking layer is an optical lens having a third light-blocking region disposed on the curved surface.
In Paragraph 3, The thickness of the first and second light-blocking regions is the same as that of the optical lens.
Step of injecting an optical lens; Step of applying a light-blocking image to the pad; A step of aligning the above pad with the above optical lens; A step of transferring the light-blocking image onto the surface of the flange of the optical lens; and A step of forming a light-blocking layer by heat-curing the light-blocking image above; Method for manufacturing an optical lens.
In Article 5, A method for manufacturing an optical lens in which the pad transfers a light-blocking image to the upper surface of the flange portion of the optical lens and to both flat surfaces of the optical lens.

Description

Optical lens and method for manufacturing the same The present invention relates to an optical lens and a method for manufacturing the same. Camera modules perform the function of capturing objects and saving them as images or videos, and are installed in various applications. In particular, camera modules are manufactured in ultra-compact sizes and are applied not only to portable devices such as smartphones, tablet PCs, and laptops, but also to drones and vehicles, providing a wide range of functions. The camera module may include a lens module in which multiple lenses are stacked, and light passing through the lens module is recognized by an image sensor and processed by a processor of an electronic device, and the processed data may be stored in memory. Since the clarity of an image or picture can be determined by the light recognized by the image sensor, a high-clarity image can be obtained by preventing reflected or scattered light from being transmitted to the image sensor. Therefore, when photographing a subject using the above camera module, the flare causes white light scattering on or around the subject in the captured image of the imaging element, thereby reducing the resolution of the subject. Meanwhile, in order to prevent such flare, the conventional technology forms a light-blocking layer on some surfaces of the lens. In conventional technology, a lens mold is etched or laser-processed to form a concave portion with surface roughness on the outer side of the effective diameter of the lens, and a black dye is applied to the concave portion to form a light-blocking layer. Since the manufacturing process of these lenses involves machining on a mold, there is a problem with errors in the effective diameter, and a problem arises where the light-blocking layer is not accurately applied to the outer edge of the effective diameter but instead encroaches upon it. Conventionally, camera modules are used in portable electronic devices, and due to the miniaturization of portable electronic devices, camera modules mounted in portable electronic devices are also required to be miniaturized. A D-cut lens is a lens in which a portion of the lens is cut flat so that it can be mounted in the narrow space of a frame, such as in a portable camera. In the case of a D-cut lens, a light-blocking layer must be formed on the cut surface, and a precise process is required to ensure that the light-blocking layer is accurately applied to the cut surface when forming it. FIG. 1 is an exemplary diagram of a method for manufacturing an optical lens according to an embodiment of the present invention. FIG. 2 is a flowchart of a method for manufacturing an optical lens according to an embodiment of the present invention. FIG. 3 shows an example of an optical lens according to the first embodiment. FIG. 4 is a perspective view of an optical lens according to a second embodiment. FIG. 5 shows the upper surface of an optical lens according to a second embodiment. FIGS. 6 to 9 are unfolded views of a light-blocking layer according to an embodiment. FIG. 10 is an example photograph of an optical lens with a light-blocking layer applied according to a second embodiment. Figure 11 is a photograph showing a modified example of Figure 4. Figure 12 shows a conventional method for manufacturing optical lenses. Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. The suffixes 'module' and 'part' for components used in the following description are assigned or used interchangeably for the sake of ease of drafting the specification and do not inherently possess distinct meanings or roles. Furthermore, the attached drawings are intended to facilitate an easy understanding of the embodiments disclosed in this specification, and the technical concepts disclosed in this specification are not limited by the attached drawings. Additionally, when an element such as a layer, region, or substrate is referred to as existing 'on' another component, this includes existing directly on the other element or having other intermediate elements existing between them. FIG. 1 is an exemplary diagram of a method for manufacturing an optical lens according to an embodiment of the present invention, and FIG. 2 is a flowchart of a method for manufacturing an optical lens according to an embodiment of the present invention. Referring to FIG. 1, the method for manufacturing an optical lens (1) according to an embodiment of the present invention simplifies the injection molding process of the lens portion (100) by eliminating the need for other processing steps, such as sanding or laser processing, on the mold. Additionally, since the mold is not processed, the flange portion (120) of the injected lens portion (100) can be formed flat. After the lens portion (100) is injected, a light-blocking image (50a) can be transferred onto the flange portion (120). Specifically, the light-blocking image