Optical components and optical films

Abstract

The invention provides an optical film with both hydrophilic and anti-reflection functions. In the multilayer film (102) which is an optical thin film, the uppermost film is a hydrophilic film (111) which is a porous film. The film of the next uppermost layer is a base film (122) as a dense film. The porosity of the hydrophilic film (111) is not less than 2% and not more than 20%, and the physical film thickness of the hydrophilic film (111) is not less than 0.5nm and not more than 20nm. The porosity of the base film (122) is less than 2%.

Description

technical field [0001] The present invention generally relates to an optical film. Background technique [0002] As an example of an optical element, there is an optical lens (for example, a glass lens) mounted on a camera such as a still camera or a video camera. It is well known that when shooting is performed in a state where water droplets (for example, fog) adhere to the lens surface, the quality of a captured image deteriorates. [0003] As a measure to solve such a problem, a technique disclosed in Patent Document 1 of forming a hydrophilic film on a lens for a camera can be considered. [0004] prior art literature [0005] patent documents [0006] Patent Document 1: Japanese Patent Laid-Open No. 2016-224113 Contents of the invention [0007] (Technical problem to be solved by the invention) [0008] Generally, an anti-reflection film is formed on a camera lens to increase transmittance and improve the quality of captured images. Therefore, the technique of ...

AI Technical Summary

Problems solved by technology

It is well known that when shooting is performed with water droplets (such as fog) attached to the surface of the lens, the quality of the captured image deteriorates

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