Six-Element Optical Imaging Lens for Compact Mobile Devices
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Solution Overview
Problem
Conventional optical imaging lenses for smaller mobile devices are too long and fail to maintain good optical characteristics and a larger field angle while being compact.
Innovation Solution
An optical imaging lens system comprising six lens elements with specific refracting powers and surface shapes, including convex and concave portions, is designed to reduce length while maintaining optical efficiency and field angle, with controlled parameters such as central thickness and air gaps to optimize performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional optical imaging lenses are designed for smaller mobile devices, then the device size is reduced, but the lens length becomes too long and optical characteristics deteriorate
Solution Approach 1:
The patent applies parameter changes by precisely controlling the central thickness (T1-T6) and air gaps (G12, G23, G34, G45, G56) of each lens element to optimize the overall lens length. By adjusting these parameters within specific ranges, the lens achieves a compact form factor while maintaining good optical characteristics and a larger field angle, directly resolving the contradiction between device miniaturization and lens length reduction.
Solution Approach 2:
The patent utilizes spheroidality by designing specific convex and concave surface shapes on each lens element. The first lens element has a convex object-side surface, the second has a concave object-side surface, and subsequent elements have varying convex/concave configurations. These curved surface designs enable effective light control within a shorter optical path, reducing lens length while maintaining optical performance.
2Length of moving object
If the optical imaging lens length is shortened, then device size is reduced, but optical characteristics and field angle may deteriorate
Solution Approach 1:
The patent applies segmentation by dividing the optical system into six distinct lens elements with specific refracting powers (positive or negative) and surface configurations. Each element is optimized for specific optical functions, allowing the system to achieve compact length while maintaining comprehensive optical performance including field angle and image quality through the combined effect of segmented elements.
Solution Approach 2:
The patent employs composite materials by combining lens elements with different refractive indices (n1-n6) and Abbe numbers (v1-v6). This composite approach allows each element to contribute differently to the overall optical performance, enabling short lens length while maintaining good optical characteristics through the synergistic effect of materials with complementary properties.
3Reliability
If six lens elements are used to maintain optical characteristics, then optical performance is improved, but the lens length increases
Solution Approach 1:
The patent applies the nested doll principle by tightly arranging six lens elements with minimal air gaps (G12, G23, G34, G45, G56) between them. The elements are nested in sequence along the optical axis with precise spacing, allowing the system to accommodate six elements for good optical performance while minimizing the overall length through compact, space-efficient configuration.
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 effectively shortens the optical imaging lens length while preserving good optical characteristics and enhancing the view angle, achieving improved imaging quality and reduced production complexity for smaller mobile devices.
Implementation Method 1
Each of the first, second, third, fourth, fifth and sixth lens elements may have refracting power
Data Source
AI summary
Present embodiments provide for mobile devices and optical imaging lens thereof. Optical imaging lens may comprise an aperture stop and six lens elements positioned sequentially from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements and designing parameters satisfying at least one inequality, the optical imaging lens may exhibit better optical characteristics and the total length of the optical imaging lens may be shortened.