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, particularly for handheld devices like smartphones and digital cameras, where the shrinking pixel size of photosensitive devices and increasing demand for high imaging quality require more complex lens structures.
Innovation Solution
A six-piece camera optical lens design is proposed, comprising lenses made of glass and plastic materials with specific refractive powers, curvature radii, and thickness ratios, optimized to minimize aberrations and achieve ultra-thin and wide-angle capabilities, with conditions such as f1/f ≤ 0.657 and Abbe number v1 ≥ 60.6, ensuring effective correction of aberrations and maintaining miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a three-piece or four-piece lens structure is used, then the device complexity is reduced, but the imaging quality deteriorates
Solution Approach 1:
The lens system is divided into six distinct lens elements with specific refractive powers and material properties. Each lens element (first through sixth lenses) is independently designed with specific curvature radii, thicknesses, and materials (glass or plastic) to correct various aberrations and achieve high imaging quality while maintaining a compact form factor suitable for mobile devices.
2Length of moving object
If the lens is made ultra-thin, then the device size is reduced, but the optical characteristics deteriorate
Solution Approach 1:
The patent employs specific parameter ranges for each lens element including curvature radii (R1 through R12), thickness ratios (d1/TTL, d2/TTL, etc.), refractive indices (n1 through n6), and Abbe numbers (v1 through v6). These parameters are optimized to achieve a total optical length of less than 5.78mm while correcting chromatic aberrations and maintaining wide-angle performance with a field of view of 70 degrees or more.
3Manufacturing precision
If the lens structure is made more complex to correct chromatic aberration, then the imaging quality is improved, but the device complexity increases
Solution Approach 1:
The patent utilizes composite material design by combining different glass and plastic materials with specific refractive indices and Abbe numbers for each lens element. The first lens has Abbe number v1≥60.6, the second lens has v2 between 20.0-40.0, and subsequent lenses have appropriately selected material properties. This composite material approach enables effective chromatic aberration correction across multiple wavelengths while maintaining a practical six-element structure.
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 excellent optical characteristics, including full correction of on-axis and off-axis chromatic aberrations, maintaining miniaturization, and enhancing imaging quality with a total optical length less than 5.78 mm, suitable for wide-angle and ultra-thin applications.
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 includes, in an order from an object side to an image side, a first lens, a second lens having a negative 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 plastic material, the fourth lens is made of plastic material, the fifth lens is made of glass material, and the sixth lens is made of plastic material. The camera optical lens further satisfies specific conditions.