Five-Lens Camera Optical Lens for Ultra-Thin Long Focal Length
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Solution Overview
Problem
There is a need for ultra-thin camera optical lenses with long focal lengths that achieve high imaging performance, particularly for handheld devices and imaging systems with smaller pixel sizes, where traditional lens structures fail to meet the demands of improved optical characteristics and miniaturization.
Innovation Solution
A camera optical lens design comprising five lenses with specific refractive powers and curvature radii, optimized by conditions such as 0.45≤f3/f≤1.00, 2.50≤d4/d3≤4.50, and 1.50≤d7/d8≤3.00, which corrects aberrations and facilitates ultra-thin, long focal length lenses suitable for mobile devices and web cameras.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional three-piece or four-piece lens structure is used, then manufacturing complexity is reduced, but imaging quality and optical performance deteriorate
Solution Approach 1:
The lens system is divided into five distinct lens elements with specific refractive power distributions. Each lens element serves a specific optical function, allowing precise control over aberration correction and image quality while maintaining a manageable structural complexity through systematic segmentation of the optical path.
2Length of moving object
If lens thickness is reduced to achieve ultra-thin profile, then device miniaturization is improved, but optical performance and aberration correction deteriorate
Solution Approach 1:
The patent employs specific parameter ranges for lens thickness ratios (d3/d2, d5/d4) and curvature radius relationships ((R3+R4)/(R3-R4)) to optimize the balance between thinness and optical performance. By carefully controlling these dimensional parameters within defined ranges, the system achieves ultra-thin profile while maintaining adequate aberration correction capability.
Solution Approach 2:
The lens design incorporates flexible thickness distribution where individual lens elements can be adjusted within specific ratio ranges. This dynamic approach allows optimization of each element's contribution to overall optical performance while adapting to the ultra-thin form factor requirements, rather than using fixed uniform thickness throughout the system.
3Manufacturing precision
If focal length is increased to achieve long focal length, then imaging performance is improved, but device size and thickness increase
Solution Approach 1:
The system achieves long focal length with compact size by optimizing the focal length ratio (f3/f) within a specific range and controlling the overall optical power distribution across five lens elements. This parameter optimization allows extended focal length while maintaining a compact form factor suitable for portable devices.
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 optical performance, large aperture, and miniaturization, ensuring excellent imaging quality and long focal lengths for mobile devices and web cameras, while maintaining the lenses' ultra-thin profile.
Implementation Method 1
a first lens L1 having a positive refractive power; a second lens L2 having a negative refractive power; a third lens L3 having a positive refractive power; a fourth lens L4 having a positive refractive power; and a fifth lens L5 having a negative refractive power
Data Source
AI summary
The present disclosure a camera optical lens comprising, from an object side to an image side, a first lens having a positive refractive power, a second lens, a third lens having a positive refractive power, a fourth lens, and a fifth lens having a negative refractive power, the camera optical lens satisfying conditions of 0.45≤f3/f≤1.00, 2.50≤d4/d3≤4.50, 1.50≤d7/d8≤3.00 and 2.00≤(R3+R4)/(R3−R4). The camera optical lens can achieve excellent optical characteristics while meeting the designing requirement for having a large aperture and a long focal length and being ultra-thin.