Super Wide-Angle Lens Design for Compact Mobile Imaging
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Solution Overview
Problem
There is a demand for compact, high-resolution super wide-angle lenses with a large field of view suitable for portable devices like mobile phones, which existing lenses struggle to meet due to size constraints and optical performance limitations.
Innovation Solution
A super wide-angle lens design comprising a front lens group and a rear lens group with specific refractive power arrangements, including negative and positive lenses, an aperture stop, and aspheric lenses, optimized to achieve a field of view between 100° and 160° while maintaining a compact size and high performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the field of view is increased to achieve super wide-angle imaging, then the lens length and complexity increase, but compact size is compromised
Solution Approach 1:
The lens is divided into six individual lens elements with alternating positive and negative refractive powers, arranged in a compact sequence. This segmentation allows each element to contribute specifically to achieving the super wide-angle field of view while keeping the overall lens length controlled through optimized individual element design
Solution Approach 2:
The patent applies specific mathematical conditions to control the refractive powers and physical parameters of each lens element. By precisely controlling parameters such as the ratio of refractive powers between adjacent lenses and the relative positions of lens elements, the design achieves FOV≥100° while maintaining a compact form factor suitable for mobile devices
2Reliability
If the number of lens elements is increased to improve optical performance, then the lens complexity and size increase, but compact design is compromised
Solution Approach 1:
The patent establishes specific mathematical relationships between the parameters of six lens elements, including refractive power ratios and positional relationships. These parameter constraints optimize optical performance for super wide-angle imaging while preventing excessive complexity by maintaining a regular alternating pattern of positive and negative lenses
Solution Approach 2:
The patent employs aspheric surfaces on at least some lens elements to correct optical aberrations inherent in wide-angle designs. The aspheric shapes allow for improved image quality and reduced distortion without requiring additional lens elements, thereby controlling complexity while enhancing optical performance
3Adaptability or versatility
If the lens elements are optimized for wide-angle performance, then chromatic aberration and astigmatism increase, but image quality is compromised
Solution Approach 1:
The patent applies specific mathematical conditions to control the refractive indices and Abbe numbers of the lens materials. By carefully selecting materials and controlling the ratio of refractive powers between adjacent elements, the design corrects chromatic aberration while maintaining super wide-angle capability. The alternating positive-negative lens configuration specifically addresses astigmatism correction
Solution Approach 2:
Aspheric surfaces are implemented on selected lens elements to correct field curvature and astigmatism that are particularly problematic in wide-angle lenses. The aspheric profiles allow for precise control of light rays across the entire wide field of view, improving image quality at the edges while maintaining the FOV≥100° requirement
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 design achieves a wide field of view, compact size, and high optical performance, suitable for mobile devices, by controlling chromatic aberration and astigmatism through refractive power distribution and aspheric surfaces, ensuring effective image capture with reduced lens length.
Implementation Method 1
a first lens having a negative refractive power; a second lens having a positive refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power; a fifth lens having a positive refractive power; and a sixth lens having a negative refractive power
Data Source
AI summary
Provided are a super wide-angle lens and an imaging device including the same. The super wide-angle lens includes first to sixth lenses arranged from an object side toward an image plane side in this stated order and respectively having negative, positive, positive, negative, positive, and negative refractive powers. The super wide-angle lens may have a field of view of 100 degree or more.