Six-Lens Camera Optical Design for Long-Focal-Length Imaging
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Solution Overview
Problem
There is an urgent need for long-focal-length camera lenses with good optical characteristics, large aperture, and fully corrected aberration to meet the demands of high-resolution imaging in miniature camera optical lenses for devices like smartphones and digital cameras.
Innovation Solution
A camera optical lens design comprising six lenses with specific refractive powers and surface curvatures, including glass lenses, aspheric surfaces, and optimized spacings to achieve a balance between large aperture and long focal length while correcting various aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a multi-piece lens structure is adopted to improve imaging quality, then the lens can achieve better optical characteristics, but the device complexity increases
Solution Approach 1:
The lens system is divided into six separate lens elements with different refractive powers (negative, positive, positive, negative, positive, negative), allowing each element to be optimized for specific optical functions while collectively achieving superior imaging quality and aberration correction
Solution Approach 2:
The patent specifies precise parameter ranges for focal length ratios (f1/f, f34/f), curvature radius ratios (R10/R9, R12/R11), and spacing ratios (d8/d4) to optimize the balance between optical performance and structural complexity
2Measurement precision
If the pixel size of photosensitive devices becomes smaller to increase resolution, then imaging quality improves, but the requirement for aberration correction becomes more stringent
Solution Approach 1:
Different lens elements are assigned different refractive powers and optical characteristics tailored to their specific functions - for example, negative refractive power lenses for correcting certain aberrations and positive refractive power lenses for others, with each element's parameters locally optimized
Solution Approach 2:
The lens system combines multiple lens materials with different refractive indices and dispersion characteristics to achieve comprehensive aberration correction, particularly important for small pixel size applications requiring high resolution
3Illumination intensity
If a large aperture is designed to improve light gathering capability, then optical performance improves, but the focal length becomes shorter
Solution Approach 1:
The lens system uses a complex arrangement of six elements with varying refractive powers to dynamically control light paths, allowing the system to achieve both large aperture and long focal length through the combined optical effect of all elements rather than a single element
4Volume of moving object
If the lens is miniaturized for portable devices, then device size reduces, but optical performance deteriorates
Solution Approach 1:
The six lens elements are arranged in a compact nested configuration where each element is precisely positioned and spaced, allowing the entire lens system to achieve high optical performance within a minimized volume suitable for portable devices
Solution Approach 2:
The patent establishes specific parameter ranges including focal length ratios, curvature radius ratios, and spacing ratios that optimize optical performance for miniaturized lens designs, ensuring that even with reduced size, the lens achieves excellent aberration correction and imaging quality
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 lens design achieves excellent optical performance with a large aperture and long focal length, suitable for high-pixel cameras in mobile devices, effectively correcting aberrations and ensuring high imaging quality.
Implementation Method 1
a first lens having a negative refractive power; a second lens having a positive refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power; a fifth lens having a positive refractive power; and a sixth lens having a negative refractive power
Data Source
AI summary
The present disclosure relates to the technical field of optical lens and discloses a camera optical lens. The camera optical lens includes, from an object side to an image side: a first lens having a negative refractive power; a second lens having a positive refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power; a fifth lens having a positive refractive power; and a sixth lens having a negative refractive power. The camera optical lens satisfies following conditions: −8.00≤f1/f≤−3.00; −6.00≤f34/f≤−1.50; and R10/R9≥1.50. The camera optical lens has outstanding optical functions, while satisfying a desire of large aperture and long focal length.