Eight-Lens Camera Optical Design for Large-Aperture Miniaturization
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Solution Overview
Problem
Existing vehicle lidar lenses face challenges in achieving good optical performance while meeting the design requirements of large aperture and miniaturization.
Innovation Solution
A camera optical lens design comprising multiple lenses (first to eighth lenses) with specific optical parameters such as thickness, curvature, refractive indices, and focal lengths, optimized to ensure good optical performance, large aperture, and miniaturization, suitable for vehicle-mounted Lidar, cellular phone camera lens assemblies, and WEB camera lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the focal length of the lens is set with irrational design, then the optical performance is maintained, but the design requirements of large aperture and miniaturization cannot be met
Solution Approach 1:
The patent applies parameter changes by establishing specific mathematical relationships between the focal lengths of different lenses (f3, f4, f6, f7) and their ratios. By controlling these parameters within defined ranges, the system achieves both large aperture and miniaturization requirements while maintaining optical performance.
Solution Approach 2:
The lens system is segmented into multiple individual lenses (first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, and eighth lens) with distinct functions. Each lens contributes to specific optical corrections, allowing the system to achieve complex optical performance through modular components.
2Ease of manufacture
If the lens structure is simplified, then the manufacturing is easier, but the optical performance cannot meet the design requirements
Solution Approach 1:
The patent specifies precise parameter ranges for lens thickness ratios (d3/d1, d7/d1), curvature radius ratios (R3/R4), focal length ratios (f4/f3, f6/f7), and refractive indices (nd8). By controlling these parameters within defined ranges, the system achieves both ease of manufacture and high optical performance.
3Volume of moving object
If the lens is designed for miniaturization, then the device size is reduced, but the aperture cannot be made large
Solution Approach 1:
The patent resolves the miniaturization-aperture contradiction by changing the dimensional arrangement of lenses. Through specific spatial positioning and optical path design, the system achieves large aperture characteristics within a compact overall lens structure.
Solution Approach 2:
By controlling the ratio of focal lengths and thicknesses within specific ranges, the patent enables the lens system to achieve both miniaturization and large aperture. The parameter constraints ensure that the optical path length remains short while the effective aperture is maximized.
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 characteristics, enabling large aperture and miniaturization, suitable for high-pixel camera elements like CCD and CMOS, with improved imaging quality and light receiving ability.
Implementation Method 1
a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens
Data Source
AI summary
Disclosed is a camera optical lens. The camera optical lens includes from an object side to an image side in sequence: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The camera optical lens satisfies the following conditions: 1.00≤d3/d1≤3.00; 0.20≤R3/R4≤0.90; 1.00≤f4/f3≤4.00; 0.50≤f6/f7≤1.40; 1.80≤nd8≤2.20. The thicknesses on-axis of the first lens and the second lens are d1 and d3, respectively. The curvature radius of the object side surface and image side surface of the second lens are R3 and R4, respectively. The focal lengths of the third lens, the fourth lens, the sixth lens, and the seventh lens are f3, f4, f6, and f7, respectively. The refractive index of the eighth lens is nd8. The camera optical lens has good optical performance and is characterized by a large aperture and miniaturization.