Zoom Lens Abbe Number Optimization for Compact Design
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Solution Overview
Problem
Existing zoom lens systems face challenges in miniaturization while maintaining high optical performance and low manufacturing costs, as they often require increased size to effectively compensate for aberration.
Innovation Solution
A zoom lens system configuration with specific refractive powers and Abbe numbers for lenses, including a first lens group with negative refractive power and a second lens group with positive refractive power, where the Abbe numbers of individual lenses are optimized to minimize size while compensating for aberration, and incorporating aspheric surfaces for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the lens system is miniaturized to improve portability and reduce manufacturing costs, then the size decreases, but the ability to compensate for aberration deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the Abbe numbers of specific lenses within the lens groups. The first lens has an Abbe number of 20.3, the second lens has an Abbe number of 58.6, and the third lens has an Abbe number of 23.5. By optimizing these optical parameters, the patent achieves effective aberration compensation in a miniaturized lens system, resolving the contradiction between small size and aberration correction capability.
2Reliability
If high optical performance is realized by increasing lens system size to compensate for aberration, then aberration compensation improves, but manufacturing costs increase
Solution Approach 1:
The patent optimizes optical parameters (Abbe numbers) to achieve effective aberration compensation with a compact lens structure, reducing the need for additional corrective elements that would increase manufacturing complexity and cost.
Solution Approach 2:
The lens groups are designed to perform multiple functions simultaneously - the first lens group with negative refractive power contributes to both focusing and aberration correction, while the second lens group with positive refractive power provides both imaging and additional aberration compensation. This multi-functionality reduces the need for separate corrective elements, lowering manufacturing costs.
3Volume of moving object
If the lens system is miniaturized for portability, then portability improves, but optical performance deteriorates
Solution Approach 1:
By precisely controlling the Abbe numbers of the lenses (first lens: 20.3, second lens: 58.6, third lens: 23.5), the patent achieves effective aberration compensation in a miniaturized lens system, maintaining high optical performance while reducing size for improved portability.
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 system effectively compensates for aberration across the image field, allowing for miniaturization while maintaining high optical performance, and supports seamless transitions between day and night imaging modes by effectively handling visible and near-infrared light.
Implementation Method 1
a first lens having a negative refractive power, a second lens having a negative refractive power, a third lens having a negative refractive power, and a fourth lens having a positive refractive power
Implementation Method 2
the fifth lens may have at least one aspheric surface... the tenth lens may have at least one aspheric surface
Data Source
AI summary
A zoom lens system capable of satisfactorily compensating for aberration, including, in an order from an object to an image, a first lens group having a negative refractive power, an aperture, and a second lens group having a positive refractive power, wherein the first lens group including a first lens, a second lens, a third lens and a fourth lens in the order from the object to the image, and wherein an Abbe number of the first lens is less than 30, an Abbe number of the second lens is greater than 45 and less than 65, and a ratio of an Abbe number of the third lens to an Abbe number of the fourth lens is greater than 3.8 and less than 4.3.