Optical element and method for manufacturing same

Abstract

An optical element comprises a transparent substrate which is provided with a first surface and a second surface that are opposite. The first surface is provided with a first optical part and a light shading film that is plated on the first surface and surrounds the transparent area of the first optical part. The second surface is provided with an infrared blocking optical filtering film which isprovided with a second optical part at the position corresponding with the first optical part. The invention also relates to a method for manufacturing the optical element, wherein the method comprises the following steps: providing the transparent substrate, forming a light blocking layer on a first surface of transparent substrate; forming an infrared blocking optical filtering film on a secondsurface of transparent substrate; removing one part of light blocking to form a non-optical area; forming a light shading film on the non-optical area; removing the residual light blocking to form the optical area; impressing and forming the first optical part in the optical area with an impressing mould; and impressing and forming a second optical part with the impressing mould at a position corresponding with the first optical part on the surface of infrared blocking optical filtering film.

Description

technical field [0001] The invention relates to an optical element and a manufacturing method of the optical element, in particular to an embossed optical element and a manufacturing method of the optical element. Background technique [0002] With the development of science and technology, portable devices, such as mobile phones, digital cameras and other electronic products with camera and video functions, are widely used, and tend to be thinner, lighter and smaller. The portability and miniaturization of portable devices impose miniaturization requirements on the camera modules combined with them. However, according to the current state of the art, each part of the camera module is manufactured separately in the manufacturing chain, for example, the diaphragm, lens, and infrared cut filter are manufactured separately and then assembled. As each part is miniaturized, it becomes difficult to assemble the parts, so that the product yield decreases. Assembling the component...

AI Technical Summary

Problems solved by technology

[0004] In injection molding (see Replication of microlens arrays by injection molding, Microsystems Technologies 10: pp.531-535, 2004), as the lens size shrinks, the optical design deviation of manufacturing tools is more difficult to control during manufacturing. It will cause problems such as the increase of the eccentricity of the lens, the central thickness of the lens does not meet the requirements, etc., and then affect the image quality

[0005] While in imprint molding (see The Novel Fabrication Method and Optimum Tooling DesignUsed for Microlens Arrays, Proceedings of the 1 st IEEE International Conference on Nano / Micro Engineered and Molecular Systems; January 18-21, 2006, Zhuhai, China) method, the liquid or plastic deformation material is coated on the substrate first, and then imprinted with an imprint mold, because at this time The material is in a liquid or molten state, and the pressure generated when the imprinting mold imprints the material causes the material to overflow the lens forming area, leaving residual material in the non-lens forming area after solidification, which also greatly reduces the loss of the lens. precision

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