Wide-Angle Lens Design for Field of View and Aberration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current camera technologies, such as those used in video surveillance and sports cameras, require wider fields of view, greater light flux, and higher imaging quality, which existing wide-angle lenses fail to adequately provide.
Innovation Solution
A wide-angle lens design comprising multiple glass lens groups with specific refractive powers and surface curvatures, including a first group for light alignment, a second group for light convergence and aberration correction, and a third group for chromatic and spherical aberration control, along with a stop and filter configuration, to enhance field of view and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If existing wide-angle lens designs are used, then the field of view is limited, but increasing the field of view requires complex lens structures that reduce imaging quality
Solution Approach 1:
The lens is divided into three distinct groups (first group with negative refractive power, second group with positive refractive power, third group with positive refractive power), each with specific functions. This segmentation allows optimization of each group independently to achieve wide field of view while maintaining imaging quality through precise aberration control in each segment.
Solution Approach 2:
The patent uses composite lens structures combining different refractive power groups and materials with specific Abbe numbers and refractive indices. The combination of negative and positive refractive power groups creates a composite optical system that achieves wide field of view while correcting aberrations through material properties.
2Area of stationary object
If lens complexity is increased to achieve wider field of view, then field of view expands, but device complexity increases
Solution Approach 1:
By segmenting the lens into three functional groups with specific refractive powers, the patent achieves wide field of view (100° or more) while managing complexity through modular design. Each group has a defined role: first group for light alignment, second group for convergence and aberration correction, third group for chromatic aberration control.
Solution Approach 2:
The lens groups serve multiple functions simultaneously - the first group with negative refractive power both aligns light parallel to the optical axis and contributes to wide field of view, while the second group provides both convergence and aberration correction. This multi-functionality reduces overall system complexity.
3Quantity of substance
If aperture is increased to allow more light flux, then light flux increases, but aberrations increase reducing imaging quality
Solution Approach 1:
The patent employs composite optical structures with specific refractive indices and Abbe numbers to control aberrations while maintaining large aperture. The combination of positive and negative refractive power groups with carefully selected material properties corrects spherical and chromatic aberrations, enabling large aperture designs that maintain high imaging quality.
Solution Approach 2:
Different regions of the lens system have optimized local properties - the first group uses negative refractive power for light alignment, the second group uses positive refractive power for convergence with specific surface curvatures to correct spherical aberration, and the third group is optimized for chromatic aberration control. This local optimization allows large aperture while maintaining image quality.
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 design achieves a wide field of view, large aperture, and high imaging quality by aligning light parallel to the optical axis, correcting aberrations, and controlling exit angles, resulting in improved relative illuminance and reduced ghosting effects.
Implementation Method 1
a first group with a negative refractive power... the first lens has a negative refractive power... receiving lights and reducing the angle between the lights and the optical axis, so that the lights are nearly parallel to the optical axis after passing through the first group
Implementation Method 2
a second group with a positive refractive power... the third lens has a positive refractive power... the fourth lens has a positive refractive power... light convergence, and correction of aberrations such as spherical aberration and coma
Implementation Method 3
a third group with a positive refractive power... the fifth lens has a positive refractive power... the sixth lens has a positive refractive power... the seventh lens has a negative refractive power... the eighth lens has a positive refractive power... eliminate the effect of chromatic aberration, field aberration, and spherical aberration, and control the exit angle of the main ray
Implementation Method 4
the sixth lens and the seventh lens form a cemented body... the sixth lens has a positive refractive power... the seventh lens has a negative refractive power
Data Source
AI summary
Provided are a wide-angle lens, a camera module having a wide-angle lens, and a camera having a camera module having a wide-angle lens. A first group includes a first lens and a second lens each having a negative refractive power. A second group includes a third lens and a fourth lens each having a positive refractive power. The third group includes a fifth lens and a sixth lens each having a positive refractive, a seventh lens having a negative refractive power, and an eighth lens having a positive refractive power, the sixth lens and the seventh lens form a cemented body. The wide-angle lens, the camera module and the camera adopt eight glass lenses.