Copper Complex Filter Lens Near-Infrared Absorption
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Solution Overview
Problem
The existing optical camera lens modules are oversized due to the need for external filters to block near-infrared rays, which interferes with image quality and cannot be miniaturized to meet the demands of modern device design, particularly in mobile phones, increasing the risk of damage and not aligning with the trend of miniaturization.
Innovation Solution
A filter lens is developed using a copper complex formed by a copper compound, phosphonic acid, and phosphor-containing compounds, which effectively absorbs near-infrared rays while maintaining high transmittance for visible light, reducing the need for additional filters and minimizing module size by integrating near-infrared absorption properties directly into the lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If external filters are added to block near-infrared rays, then image quality is improved, but the optical camera lens module size increases
Solution Approach 1:
The patent combines the near-infrared filtering function with the lens itself by incorporating a copper complex into the lens material. This merges the filtering function that was previously performed by a separate external filter into the lens structure, eliminating the need for additional filter components and reducing overall module size.
Solution Approach 2:
The patent uses a copper complex compound as a composite material additive within the lens material. This composite material provides both the optical properties needed for the lens and the near-infrared absorption properties, allowing a single material to serve multiple functions.
2Manufacturing precision
If the number of lenses in the lens group increases for functionality and image quality, then image quality is improved, but the optical camera lens module size increases
Solution Approach 1:
The patent makes the lens multi-functional by incorporating the copper complex, allowing it to serve both as an optical element for image formation and as a near-infrared filter. This multi-functionality reduces the need for additional specialized components, enabling module miniaturization while maintaining image quality.
3Object-affected harmful factors
If external filters are used to filter near-infrared rays, then near-infrared absorption is improved, but the device complexity increases
Solution Approach 1:
The patent merges the filtering function with the lens by incorporating the copper complex into the lens material. This consolidation reduces the number of separate components and simplifies the overall device structure, eliminating the need for additional filter elements and their associated mounting and alignment requirements.
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
The filter lens achieves excellent near-infrared absorption with high transmittance for visible light, reducing the overall size of the camera lens module and enhancing image quality by eliminating the need for external filters, thus addressing the issue of miniaturization and thinness in camera lens design.
Implementation Method 1
a copper complex which is formed by a copper compound providing copper ions, a phosphonic acid represented by Formula 1, and at least one phosphor-containing compound represented by Formulas 2 to 4, wherein the OD value of the filter lens for the incident light wavelength of 930 nm to 950 nm is greater than 4
Data Source
AI summary
Provided is a filter lens and a method for preparing the filter lens. The filter lens includes a copper complex, wherein the copper complex is formed from a copper compound providing copper ions, phosphoric acid represented by formula 1 herein, and at least one phosphorus-containing compound represented by formulas 2 to 4 herein, wherein the OD value of the filter lens for the incident light wavelength of 930 nm to 950 nm is greater than 4. The present disclosure enables a filter lens to have the function of filtering out near-infrared instead of using a traditional filter component and thus the size of the assembled optical lens module is reduced. The filter lens can further filter out light having other specific wavelengths, and thereby the number of lenses in the assembled optical lens module is reduced.