7-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, 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 advanced lens designs.
Innovation Solution
A 7-piece camera optical lens structure is designed, with specific materials and refractive power conditions for each lens element, including glass and plastic materials, to achieve ultra-thin and wide-angle capabilities while correcting aberrations, featuring a combination of convex and concave surfaces and carefully controlled curvature radii and thicknesses to optimize imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a three-piece or four-piece lens structure is used, then the device complexity is reduced, but the imaging quality and chromatic aberration correction are insufficient
Solution Approach 1:
The lens system is divided into 7 separate lens elements with specific configurations (first lens with positive refractive power, second lens with negative refractive power, third lens with positive refractive power, fourth lens with negative refractive power, fifth lens with positive refractive power, sixth lens with negative refractive power, and seventh lens with positive refractive power). This segmentation allows each element to contribute to correcting specific aberrations while achieving high imaging quality and full chromatic aberration correction.
2Length of moving object
If the lens is made ultra-thin, then the device size is reduced, but the optical characteristics and aberration correction become difficult to maintain
Solution Approach 1:
The patent specifies precise parameter ranges for each lens element including curvature radii (e.g., R1, R2, R3, R4 with specific relationships), thickness ratios (d1/d2, d3/d4, d5/d6, d7/d8), and refractive power distributions. These parameter optimizations enable the lens to achieve ultra-thin total optical length while maintaining excellent optical characteristics and full chromatic aberration correction through careful control of each element's geometric and optical properties.
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 results in a lens with excellent optical characteristics, fully corrected on-axis and off-axis chromatic aberrations, and a compact form factor, maintaining miniaturization characteristics with a short total optical length, suitable for high-quality imaging in handheld devices.
Implementation Method 1
the first lens L1 has positive refractive power; the second lens L2 has negative refractive power; the third lens L3 has positive refractive power; the fourth lens L4 has negative refractive power; the fifth lens L5 has positive refractive power; the sixth lens L6 has negative refractive power; the seventh lens L7 has 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, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The camera optical lens further satisfies specific conditions.