Integrated Lens Module with Copper Complex Absorption Layers
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Solution Overview
Problem
Current camera lens modules face issues with size increase due to the need for separate filters to block near-infrared rays, leading to potential color shifts and increased volume, which complicates device miniaturization and increases the risk of damage from protrusion.
Innovation Solution
An integrated lens module structure featuring a first and second lens with substrates, an optical bonding layer, and absorption layers comprising copper complexes and infrared/ultraviolet absorption dyes, providing effective near-infrared rejection and maintaining optical consistency across incident angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a separate filter is disposed on the incident side of the camera lens module to block near-infrared rays, then near-infrared rejection is improved, but the volume of the lens module increases
Solution Approach 1:
The patent combines the near-infrared filtering function with the existing lens structure by forming an absorption layer directly on the lens substrate. This integration eliminates the need for a separate filter component, thereby maintaining effective near-infrared rejection while preventing volume increase.
Solution Approach 2:
The patent uses composite material structures by combining the lens material with an absorption layer containing copper complexes and phosphor-containing compounds. This composite approach enables the lens itself to perform both optical focusing and near-infrared filtering functions, resolving the volume contradiction.
2Manufacturing precision
If the number and thickness of lenses in the lens group are increased to improve image quality, then image quality is improved, but the size of the camera lens module increases
Solution Approach 1:
The patent makes the lens structure multi-functional by integrating the near-infrared filtering capability directly into the lens. This allows the lens to serve both as an optical element for focusing and as a filter for blocking near-infrared rays, thereby improving image quality without requiring additional components that would increase module size.
3Object-affected harmful factors
If a separate filter is used to block near-infrared rays, then near-infrared rejection is improved, but the lens module protrudes outward increasing the risk of collision and damage
Solution Approach 1:
By merging the filtering function with the lens structure itself, the patent eliminates protruding filter components. The absorption layer is formed directly on the lens substrate, creating a flush surface that reduces the risk of collision and damage while maintaining near-infrared rejection capability.
4Object-affected harmful factors
If current filters are used to block near-infrared rays, then near-infrared rejection is improved, but color shift occurs when incident light is at a large angle
Solution Approach 1:
The patent employs composite material structures with copper complexes and phosphor-containing compounds in the absorption layer. This composite approach provides superior optical consistency compared to conventional filters, maintaining stable optical properties across different incident angles while effectively blocking near-infrared rays.
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 integrated structure achieves superior absorption of near-infrared rays, minimizes size, and reduces color shifts, ensuring high transmittance for visible light while maintaining image quality and reducing the risk of damage from protrusion.
Implementation Method 1
the first absorption layer comprises: a copper complex which is formed by a copper compound used for 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 first absorption layer for an incident light wavelength of 930-950 nm is greater than 4
Implementation Method 2
the second absorption layer comprises an infrared absorption dye and an ultraviolet absorption dye
Implementation Method 3
the second absorption layer comprises an infrared absorption dye and an ultraviolet absorption dye
Implementation Method 4
an optical bonding layer disposed on the first substrate or the second substrate and between the first substrate and the second substrate
Data Source
AI summary
Provided is a lens module with an integrated structure, including a first lens and a second lens, a first substrate and a second substrate, an optical bonding layer, a first absorption layer and a second absorption layer, wherein the first absorption layer includes a copper complex, which is formed from a copper compound, a phosphonic acid represented by formula 1 herein, and at least one phosphorus-containing compound represented by formulas 2 to 4 herein. Due to the integrated structure, the lens module can be reduced in size. The manufacturing process is simplified because no assembly process is required. The lens module of the present disclosure exhibits high transmittance for visible light and low transmittance for near-infrared, showing an excellent near-infrared cut-off effect. In addition, while the incident light irradiates the lens module at different angles, the transmittance curve only is slightly shifted.