Optical Imaging Lens Assembly With Cemented Autofocus Component
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Solution Overview
Problem
Existing miniaturized optical imaging lens assemblies for smartphones lack autofocus functionality, limiting their ability to meet diverse imaging needs in different scenarios due to the absence of a zoom characteristic.
Innovation Solution
An optical imaging lens assembly with a cemented first lens and autofocus component, featuring a variable radius of curvature on the image-side surface of the autofocus component, and a combination of lenses with specific refractive powers and aspheric surfaces, allowing for autofocus and miniaturization while maintaining high imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a fixed-focus system is used to achieve miniaturization, then the lens assembly size is reduced, but the imaging quality in different shooting scenarios deteriorates due to lack of zoom characteristic
Solution Approach 1:
The patent applies the dynamics principle by making the radius of curvature of the image-side surface of the autofocus component variable. This allows the lens assembly to dynamically adjust its optical properties for different shooting scenarios (close-up, normal, and distant objects) while maintaining a compact fixed-focus structure, thereby resolving the contradiction between miniaturization and imaging quality across different scenarios
Solution Approach 2:
The patent changes the parameter of the radius of curvature of the autofocus component's image-side surface to achieve different focal lengths. By varying this parameter, the lens assembly can adapt to different shooting distances and scenarios without changing its physical size, thus resolving the contradiction between compact size and versatile imaging capability
2Reliability
If multiple lenses with complex structures are added to achieve autofocus function, then the imaging quality improves, but the device complexity increases
Solution Approach 1:
The patent merges the autofocus component with the first lens by cementing them together, forming an integrated cemented lens structure. This combination achieves autofocus functionality without requiring separate, complex lens groups, thereby improving imaging quality while controlling device complexity
Solution Approach 2:
The autofocus component serves multiple functions: it provides autofocus capability, acts as part of the cemented lens structure for aberration correction, and enables different shooting scenarios through variable curvature. This multi-functionality reduces the need for additional separate components, resolving the contradiction between imaging quality and device complexity
3Adaptability or versatility
If the radius of curvature of the autofocus component is made variable to achieve autofocus, then the zoom characteristic is achieved, but the manufacturing precision requirements increase
Solution Approach 1:
The variable radius of curvature is achieved through a flexible film structure that can dynamically change shape. This dynamic approach allows for autofocus functionality while using flexible materials that can accommodate curvature changes, thereby managing the manufacturing precision requirements for surface curvature control
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 lens assembly achieves stable image quality, autofocus functionality, and miniaturization suitable for portable electronic devices, with improved imaging performance across various distances and scenarios.
Implementation Method 1
a first lens having positive refractive power; an autofocus component; a second lens having a refractive power; a third lens having a refractive power; a fourth lens having a refractive power
Implementation Method 2
The first lens and the autofocus component are cemented together; a radius of curvature of an image-side surface of the autofocus component is variable
Data Source
AI summary
The present disclosure provides an optical imaging lens assembly, along an optical axis from an object side to an image side, sequentially includes: a first lens having positive refractive power; an autofocus component; a second lens having a refractive power; a third lens having a refractive power; a fourth lens having a refractive power; and at least one subsequent lens having a refractive power. At least one surface from an object-side surface of the first lens to an image-side surface of the at least one subsequent lens is an aspheric surface; the first lens and the autofocus component are cemented together; and a radius of curvature of an image-side surface of the autofocus component is variable.