Six-Element Camera Lens Design for Ultra-Thin Wide-Angle Imaging
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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 plastic and glass materials, with specific refractive power and curvature radius conditions to ensure ultra-thin development and correction of aberrations, including a sixth lens with a refractive index between 1.7 and 2.2 and a total optical length less than 5.76 mm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lens pieces is increased to improve imaging quality, then chromatic aberration correction and imaging performance are improved, but the total optical length increases and the lens becomes thicker
Solution Approach 1:
The patent applies parameter changes by carefully controlling the refractive indices and Abbe numbers of each lens element. Specifically, the first lens has refractive index 1.50-1.70, the second lens has refractive index 1.60-1.80, and the third lens has refractive index 1.70-1.90. These parameter selections enable effective chromatic aberration correction while keeping the total optical length within 4.00-6.00mm, resolving the contradiction between imaging quality and lens thickness.
Solution Approach 2:
The patent uses composite material principles by combining multiple lens materials with different optical properties. The lens system integrates elements with varying refractive indices and dispersion characteristics, creating a composite optical system that corrects chromatic aberration more effectively than single-material lenses while maintaining a compact form factor.
2Manufacturing precision
If the lens structure is made more complex to correct chromatic aberration, then optical performance is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by assigning specific optical properties to specific lens positions. The first lens (positive power) addresses spherical aberration, the second lens (negative power) corrects coma and astigmatism, and the third lens (positive power) fine-tunes chromatic correction. Each lens element has locally optimized properties tailored to its position in the optical path, achieving comprehensive aberration correction with a relatively simple three-element structure.
3Adaptability or versatility
If the lens is designed for wide-angle imaging, then field of view is expanded, but distortion and aberration increase
Solution Approach 1:
The patent employs curvature principles by optimizing the surface radii of each lens element. The first lens has object-side radius R1 and image-side radius R2, the second lens has R3 and R4, and the third lens has R5 and R6. These carefully selected curvature radii enable the lens to achieve wide-angle imaging with reduced distortion and aberration, balancing field of view expansion with optical quality maintenance.
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, maintaining miniaturization characteristics and enhancing imaging quality.
Implementation Method 1
a first lens L1, a second lens L2, and a third lens L3 are provided in sequence from an object side to an image side of an optical axis of the camera optical lens 10. The first lens L1 has a positive refractive power, the second lens L2 has a negative refractive power, and the third lens L3 has a positive refractive power
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 plastic material, the second lens is made of plastic material, the third lens is made of plastic material, the fourth lens is made of plastic material, the fifth lens is made of plastic material, and the sixth lens is made of glass material. The camera optical lens further satisfies specific conditions.