IR-Blocking Lens Assembly for Compact Wide-FoV Camera Modules
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Solution Overview
Problem
The challenge of integrating multiple lens assemblies in portable electronic devices for enhanced optical performance and functionality is hindered by the demand for compactness and portability, as traditional infrared blocking filters increase size and complexity.
Innovation Solution
A miniaturized lens assembly with an infrared blocking coating layer on one or more lenses, eliminating the need for a separate infrared blocking filter, while maintaining good optical performance and allowing for a wider field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional infrared blocking filters are used, then infrared light is blocked effectively, but device size and complexity increase
Solution Approach 1:
The patent combines the infrared blocking function with the lens structure by forming an infrared blocking coating layer on the lens surface. This merges the infrared filtering function into the existing lens component, eliminating the need for a separate infrared blocking filter and reducing overall device complexity while maintaining effective infrared light blocking.
Solution Approach 2:
The lens is designed to serve multiple functions: optical focusing and infrared blocking. By incorporating the infrared blocking coating layer directly on the lens, the lens assembly achieves both image capture and infrared filtration capabilities within a single component, reducing the number of separate elements needed.
2Adaptability or versatility
If multiple lens assemblies are integrated, then optical performance and functionality are enhanced, but device size increases
Solution Approach 1:
By integrating the infrared blocking function directly into each lens assembly through coating layers, the patent reduces the total volume required for multiple lens assemblies. This allows more lens assemblies to be integrated into the device without proportionally increasing device size, as each lens unit is more compact due to the eliminated separate filter component.
3Object-affected harmful factors
If infrared blocking filter is added, then infrared light is blocked, but manufacturing complexity increases
Solution Approach 1:
The infrared blocking function is merged with the lens manufacturing process itself. The coating layer is applied during lens fabrication, combining two functions (lens making and infrared filtering) into a single manufacturing workflow. This eliminates the need for separate filter assembly steps and simplifies the overall manufacturing process.
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 solution enables miniaturization of lens assemblies, enabling more lenses to be integrated into electronic devices, enhancing optical performance and functionality without increasing device size.
Implementation Method 1
a coating layer provided on an object-side surface or an image sensor-side surface of at least one of the lenses and configured to at least partially block light in a wavelength band of 800 nm to 1000 nm
Data Source
AI summary
According to certain embodiments of the disclosure, a lens assembly and/or an electronic device including the same may comprise an image sensor, three or four lenses sequentially arranged along an optical axis from an object side to an image sensor side, and a coating layer provided on an object-side surface or an image sensor-side surface of at least one of the lenses and configured to at least partially block light in a wavelength band of 800 nm to 1000 nm. The lens assembly may meet Equation 1 and Equation 2.0.001≤BFLHFoV≤0.02[Equation 1]1.3≤OALIH≤1.6[Equation 2]Other various embodiments are possible as well.