Five-Lens Plastic Optical System for Wide-Angle High Resolution
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Solution Overview
Problem
Miniaturization and lightweight trends in mobile communications terminals pose challenges for implementing camera modules with high resolution and performance, as traditional glass lenses are heavy and difficult to miniaturize.
Innovation Solution
The optical system consists of five plastic lenses with specific refractive powers and shapes, including a first lens with negative power and a convex object-side surface, a second lens with positive power and convex surfaces, a third lens with negative power and a concave object-side surface, a fourth lens with positive power and a convex image-side surface, and a fifth lens with negative power and a meniscus shape, sequentially arranged to improve aberration and achieve high resolution and wide-angle capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If glass lenses are used in camera modules, then optical performance and resolution are improved, but weight and size increase
Solution Approach 1:
The patent replaces traditional glass lenses with plastic lenses, which are lighter and enable miniaturization while maintaining acceptable optical performance through optimized lens configuration and aberration correction design
Solution Approach 2:
The patent uses plastic material for lens elements instead of glass, combining multiple plastic lenses with different refractive powers and shapes to achieve the desired optical performance while reducing weight and size
2Manufacturing precision
If the number of lenses is increased to five or more, then resolution and aberration correction are improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent optimizes specific parameters of each lens element including refractive power, shape (convex, concave, meniscus), and material properties to achieve effective aberration correction with five lenses, balancing performance improvement with manageable complexity
Solution Approach 2:
Each lens element is designed with specific local characteristics (different refractive powers, shapes, and orientations) to address specific aberration types, with the first lens having negative power with convex object-side surface, third lens with negative power and concave object-side surface, and fifth lens with meniscus shape, optimizing overall system performance
3Weight of moving object
If plastic lenses are used instead of glass, then weight is reduced and manufacturing is simplified, but aberration correction capability deteriorates
Solution Approach 1:
The patent uses plastic material for all five lens elements, combining them in a specific configuration with alternating positive and negative refractive powers to achieve effective aberration correction while maintaining the weight and manufacturing advantages of plastic
Solution Approach 2:
The patent carefully selects and optimizes optical parameters including refractive index, Abbe number, lens curvature, and thickness for each plastic lens element to compensate for the inherently lower aberration correction capability of plastic compared to glass
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
This configuration enhances aberration correction, widens the field of view, and maintains manufacturing efficiency while reducing costs by using plastic lenses, thus addressing the limitations of miniaturization in camera modules.
Implementation Method 1
a first lens having negative refractive power, of which an object-side surface is convex, a second lens having positive refractive power, a third lens having negative refractive power, of which an object-side surface is concave, a fourth lens having positive refractive power, of which an image-side surface is convex, and a fifth lens having negative refractive power and having a meniscus shape
Data Source
AI summary
An optical system includes a first lens having negative refractive power, of which an object-side surface is convex, a second lens having positive refractive power, a third lens having negative refractive power, of which an object-side surface is concave, a fourth lens having positive refractive power, of which an image-side surface is convex, and a fifth lens having negative refractive power and having a meniscus shape in which an object-side surface thereof is convex. The first to fifth lenses are sequentially disposed from an object side. An aberration improvement effect may be increased and high resolution and a wide angle may be implemented.