Imaging Lens Sixth Lens Infrared Filter Coating
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Solution Overview
Problem
Conventional camera modules with separate infrared filters mounted using adhesive means often generate foreign objects that cause stains on photographed images due to the potential destruction of these adhesives during operation.
Innovation Solution
An imaging lens and camera module configuration where the sixth lens is coated with an infrared filter coated film, eliminating the need for a separate infrared filter and thereby preventing the generation of stains by avoiding adhesive-related foreign objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a separate infrared filter is mounted using adhesive means, then the infrared filtering function is achieved, but foreign objects are generated that cause stains on photographed images
Solution Approach 1:
The patent combines the infrared filter and the lens into a single integrated structure. The infrared filter is formed as a coated film directly on the lens surface, eliminating the need for separate mounting with adhesive means. This integration prevents foreign object generation while maintaining both the optical focusing function of the lens and the infrared filtering function in a unified component.
2Object-affected harmful factors
If a separate infrared filter is mounted using adhesive means, then the infrared filtering function is achieved, but the adhesive may be destroyed during operation generating foreign objects
Solution Approach 1:
The patent merges the infrared filter with the lens structure by forming the filter as a coated film on the lens surface. This integration eliminates the adhesive bonding interface that would be subject to operational stresses, thermal expansion, and mechanical vibrations. The unified structure ensures long-term reliability without adhesive degradation or foreign object generation.
3Object-affected harmful factors
If a separate infrared filter is used with adhesive means, then the infrared filtering function is achieved, but the assembly process becomes more complex
Solution Approach 1:
The patent integrates the infrared filter into the lens structure, reducing the component count from two separate parts (lens and filter) to a single integrated component. This simplification eliminates the adhesive application step, reduces assembly operations, and decreases overall device complexity while maintaining the infrared filtering function.
4Stability of the object's composition
If adhesive means are used to mount the infrared filter, then the infrared filter is secured, but foreign objects are generated during operation
Solution Approach 1:
The patent eliminates the adhesive mounting system by integrating the infrared filter directly onto the lens surface as a coated film. This fusion creates a permanent, stable attachment without any separate adhesive material that could degrade or shed foreign objects during operation, thereby ensuring both mounting stability and cleanliness.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration prevents the generation of stains on photographed images by eliminating the need for a separate infrared filter and the associated adhesive, ensuring cleaner images and reducing operational pollution within the camera module.
Implementation Method 1
the sixth lens is formed with an infrared filter coated film
Data Source
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AI summary
The present invention relates to an imaging lens and a camera module, the imaging lens including a first lens having positive (+) refractive power, a second lens having negative (-) refractive power, a third lens having positive (+) refractive power, a fourth lens having positive (+) refractive power, a fifth lens having negative (-) refractive power, and a sixth lens having negative (-) refractive power, wherein the sixth lens is formed with an infrared filter coated film.