Five-Lens Camera Optical Lens Design for Ultra-Thin Long Focal Length
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current camera optical lenses for handheld devices face challenges in achieving both excellent optical performance and a long focal length while being ultra-thin, due to unreasonable focal power, lens spacing, and lens shape.
Innovation Solution
A camera optical lens design comprising five lenses with specific refractive powers and curvature radii, optimized by conditions such as 0.30≤f1/f≤0.50 and −4.00≤f3/f≤−1.20, which balances spherical aberration and field curvature, and ensures an ultra-thin structure through controlled on-axis distances and thicknesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a five-piece lens structure is used to achieve good optical performance, then optical quality is improved, but the lens structure still cannot meet the design requirements of long focal length and ultra-thin due to unreasonable focal power, lens spacing and lens shape
Solution Approach 1:
The patent applies parameter changes by precisely controlling the focal lengths of individual lenses (f1, f2, f3, f4, f5) and their ratios to the total focal length f, as well as controlling the on-axis distances between lenses (d1-d9) and their ratios to total optical length TTL. These parameter optimizations enable the lens system to achieve both long focal length and ultra-thin structure while maintaining good optical performance.
Solution Approach 2:
The patent employs dynamics by making the lens structure adjustable and flexible through optimized spacing and curvature parameters, allowing the system to adapt to different focal length requirements while maintaining compact thickness. The variable curvature radii and on-axis distances enable dynamic optimization of optical paths.
2Manufacturing precision
If a five-piece lens structure is used to achieve good optical performance, then optical quality is improved, but the lens structure still cannot meet the design requirements of long focal length and ultra-thin due to unreasonable focal power, lens spacing and lens shape
Solution Approach 1:
The patent applies parameter changes by precisely controlling the curvature radii of lens surfaces (R1-R12) and their ratios, as well as the on-axis distances between lenses (d1-d9) and their ratios to total optical length TTL. These parameter optimizations enable the lens system to achieve both long focal length and ultra-thin structure while maintaining good optical performance.
Solution Approach 2:
The patent employs dynamics by making the lens structure adjustable and flexible through optimized spacing and curvature parameters, allowing the system to adapt to different focal length requirements while maintaining compact thickness. The variable curvature radii and on-axis distances enable dynamic optimization of optical paths.
3Volume of moving object
If pixel size of photosensitive devices becomes smaller, then device miniaturization is achieved, but the requirement for imaging quality becomes more stringent and existing lens structures become insufficient
Solution Approach 1:
The patent applies segmentation by dividing the lens system into five distinct lens elements (L1-L5) with different refractive powers and functions. This segmented structure allows each lens to be optimized for specific optical corrections while working together to achieve high imaging quality in a compact form factor suitable for small pixel sizes.
Solution Approach 2:
The patent employs composite materials by combining lenses with different refractive indices and optical properties (positive and negative refractive power lenses) to create a composite optical system that achieves superior imaging performance in a miniaturized structure, addressing the challenges of small pixel sizes.
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 performance, meeting the requirements for long focal length and ultra-thinness, making it suitable for high-pixel CCD and CMOS camera lenses.
Implementation Method 1
a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a negative refractive power, a fourth lens and a fifth lens having a negative refractive power
Data Source
AI summary
A camera optical lens includes, from an object side to an image side: a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a negative refractive power, a fourth lens and a fifth lens having a positive refractive power. The camera optical lens satisfies conditions of 0.30≤f1/f≤0.50, −4.00≤f3/f≤−1.20, 2.00≤d6/d7≤8.00, and 3.00≤R9/R10≤10.00. Here f denotes a focal length of the camera optical lens, f1 denotes a focal length of the first lens, f3 denotes a focal length of the third lens, d6 denotes an on-axis distance from an image-side surface of the third lens to an object-side surface of the fourth lens, d7 denotes an on-axis thickness of the fourth lens. The camera optical lens of the present disclosure has excellent optical performances, and meanwhile can meet design requirements of a large aperture, a wide angle and ultra-thin.