Six-element Camera Lens with Glass-Plastic Hybrid Materials
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Solution Overview
Problem
There is a need for ultra-thin wide-angle camera lenses with good optical characteristics and fully corrected chromatic aberration, as existing miniature camera lenses struggle to achieve high imaging quality due to shrinking pixel sizes and increasing demands for thinner and more compact designs.
Innovation Solution
A six-piece camera optical lens design is proposed, comprising lenses made of glass and plastic materials, with specific refractive power and curvature radius conditions to ensure ultra-thin development and correction of aberrations, including spherical and chromatic aberrations, while maintaining a short total optical length and large aperture for improved imaging performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lens elements is increased to improve imaging quality, then the imaging performance is improved, but the total optical length increases and the lens becomes thicker
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive indices and Abbe numbers of lens materials, as well as adjusting curvature radii and thickness ratios. Specifically, the first lens has refractive index 1.7087 and Abbe number 70, while the third lens has refractive index 1.793 and Abbe number 29.55. The patent also employs aspherical surface parameters (k values and higher-order coefficients) to correct aberrations without increasing optical length, thereby resolving the contradiction between imaging quality and compact size.
2Illumination intensity
If the aperture is enlarged to improve light gathering ability, then the imaging performance is improved, but the lens structure becomes more complex and difficult to manufacture
Solution Approach 1:
The patent divides the optical system into six distinct lens elements with specific functional assignments. The first lens (positive power) and second lens (positive power) work together to gather light, while the third lens (negative power) and subsequent lenses correct aberrations. This segmentation allows the aperture to be enlarged for improved light gathering while distributing the complexity across multiple specialized elements rather than requiring a single complex structure.
Solution Approach 2:
The patent uses composite material strategies by combining glass and plastic materials with different optical properties. The first lens uses glass material (refractive index 1.7087, Abbe number 70) for high precision, while other lenses use plastic materials for cost-effective mass production. This composite approach enables large aperture design while managing manufacturing complexity through material selection.
3Length of moving object
If the lens is miniaturized to meet thin and small requirements, then the compactness is improved, but the chromatic aberration becomes harder to correct
Solution Approach 1:
The patent applies parameter changes by carefully selecting lens materials with specific refractive indices and Abbe numbers to correct chromatic aberration in a compact design. The first lens has refractive index 1.7087 and Abbe number 70, while the third lens has refractive index 1.793 and Abbe number 29.55. This parameter optimization allows effective chromatic aberration correction within a miniaturized optical path length of 5.96mm or less.
Solution Approach 2:
The patent introduces an intermediary approach by using the second lens (with refractive index 1.6405 and Abbe number 70) as a mediator between the first and third lenses. This intermediate element helps balance the optical powers and facilitates chromatic aberration correction across the compact six-element structure, enabling miniaturization without sacrificing aberration 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 design achieves high-performance, ultra-thin, and wide-angle imaging with fully corrected on-axis and off-axis chromatic aberrations, enhancing imaging quality and maintaining miniaturization characteristics.
Implementation Method 1
a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6 arranged from the object side to the image side
Data Source
AI summary
The present disclosure discloses a camera optical lens. The camera optical lens including, in an order from an object side to an image side, a first lens, a second lens having a positive refractive power, a third lens having a negative refractive power, a fourth lens, a fifth lens, and a sixth lens. The first lens is made of glass material, the second lens is made of plastic material, the third lens is made of glass material, the fourth lens is made of plastic material, the fifth lens is made of plastic material, and the sixth lens is made of plastic material. The camera optical lens further satisfies specific conditions.