Six-element Camera Lens for Chromatic Aberration Correction
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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 lenses struggle to maintain imaging quality with shrinking pixel sizes and increasing demands for thinner, smaller camera devices.
Innovation Solution
A six-piece camera optical lens design is proposed, with specific refractive power and curvature radius conditions for each lens element, optimized to achieve ultra-thin and wide-angle performance while correcting aberrations, featuring a combination of plastic and glass materials and an optical filter to minimize chromatic aberration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional three-piece or four-piece lens structure is used, then the device complexity is low, but the imaging quality and chromatic aberration correction are insufficient
Solution Approach 1:
The lens system is divided into six separate lens elements (first lens through sixth lens) with different materials and functions. Each lens element is segmented to perform specific optical functions: the first lens (plastic, negative refractive power) controls distortion, the second lens (glass, positive refractive power) corrects chromatic aberration, and subsequent lenses optimize imaging quality. This segmentation allows complex aberration correction while maintaining manageable manufacturing complexity.
Solution Approach 2:
The lens system combines plastic and glass materials strategically. The first lens uses plastic with negative refractive power for wide-angle coverage and distortion control, while the second lens uses glass with positive refractive power for superior chromatic aberration correction. This composite material approach leverages the advantages of both materials to achieve high imaging quality without excessive complexity.
2Volume of moving object
If the pixel size of photosensitive devices is shrunk, then the device miniaturization is achieved, but the imaging quality deteriorates
Solution Approach 1:
The lens design optimizes critical parameters including focal length (5.0-8.0mm), aperture ratio (f/1.8-f/2.8), and total optical length (4.0-6.0mm) to match shrinking pixel sizes. The specific refractive power values (first lens: -2.0 to -0.5, second lens: +1.0 to +2.0) are tuned to correct chromatic aberration at small pixel dimensions, maintaining imaging quality despite device miniaturization.
3Length of moving object
If the camera lens is made thinner, then the device thinness requirement is met, but the optical characteristics and aberration correction are compromised
Solution Approach 1:
The lens system achieves effective aberration correction not just through thickness but through optimized curvature radii and refractive power distribution across multiple elements. The first lens has curvature radius ratio (R1+R2)/(R1-R2) of 1.2-3.0, and the second lens has (R3+R4)/(R3-R4) of -1.0 to -3.0, creating dimensional optimization that corrects chromatic aberration while maintaining ultra-thin profile.
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 high imaging quality and miniaturization characteristics, with a total optical length less than 5.17 mm and an aperture F number less than 2.27, supporting wide-angle and ultra-thin lens requirements.
Implementation Method 1
a first lens L1... a second lens L2... the third lens L3... the fourth lens L4... the fifth lens L5... and a sixth lens L6
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, and a sixth lens. The first lens is made of plastic material, the second lens is made of glass 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 plastic material. The camera optical lens further satisfies specific conditions.