Six-Lens Optical Imaging With Positive-Negative Power Layout
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Solution Overview
Problem
Conventional optical systems struggle to balance high image quality, low sensitivity, proper aperture size, miniaturization, and desirable field of view due to the rapid advancements in semiconductor technology and increasing functionality requirements.
Innovation Solution
An optical imaging lens system comprising six lens elements with specific refractive powers and surface configurations, including convex and concave surfaces, inflection points, and controlled focal lengths, to optimize image quality and compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lens elements is increased to improve image quality, then image quality is improved, but device complexity and size increase
Solution Approach 1:
The optical imaging lens system divides the optical path into six distinct lens elements (E1-E6), each with specific refractive powers and surface configurations. This segmentation allows complex optical corrections to be distributed across multiple simpler components, achieving high image quality while maintaining manageable system complexity through modular design
Solution Approach 2:
Each lens element serves multiple functions: the first lens element (E1) with positive refractive power provides both light convergence and aberration correction; the sixth lens element (E6) with negative refractive power and inflection point simultaneously corrects field curvature and distortion. This multi-functionality reduces the need for additional specialized elements, balancing image quality with system complexity
2Use of energy by moving object
If the aperture size is increased to improve light gathering capability, then light gathering capability is improved, but sensitivity increases and miniaturization becomes difficult
Solution Approach 1:
The system optimizes the aperture size by adjusting the refractive powers and surface curvatures of the six lens elements. Specifically, the combination of positive refractive power in E1 and E2 with negative refractive power in E6 allows for a reduced aperture diameter while maintaining adequate light gathering capability through improved optical efficiency and reduced aberrations
Solution Approach 2:
The patent specifies different refractive indices and Abbe numbers for the six lens elements (e.g., E1: nd=1.545, vd=56.1; E6: nd=1.574, vd=36.8), creating a composite optical system that maximizes light gathering capability within a compact aperture by optimizing material properties across multiple elements
3Adaptability or versatility
If the field of view is widened to improve functionality, then field of view is improved, but image quality and sensitivity become difficult to balance
Solution Approach 1:
The system employs aspheric surfaces on multiple lens elements, including the object-side surface of E1 and the image-side surface of E6 with inflection points. These curved surfaces are specifically designed to correct off-axis aberrations and field curvature, enabling a wide field of view while maintaining high image quality across the entire image plane
Solution Approach 2:
The patent specifies precise parameter relationships to control field of view and image quality: the ratio of focal lengths (0.25≤|f1/f4|≤1.00), the axial distance ratios (0.30≤T12/T56≤1.50), and the curvature radius relationship ((R9+R10)/(R9−R10)≤0.80). These parameter optimizations enable a wide field of view while correcting aberrations to maintain image 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 system achieves a balance among high image quality, low sensitivity, appropriate aperture size, miniaturization, and wide field of view, while allowing for flexible material choices like glass or plastic and optional light-folding elements for space efficiency.
Implementation Method 1
The first lens element has positive refractive power. The second lens element has positive refractive power. The fourth lens element has positive refractive power. The fifth lens element has positive refractive power. The sixth lens element has negative refractive power.
Data Source
AI summary
An optical imaging lens system includes a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element in order from an object side to an image side along an optical path. The first lens element has positive refractive power. The second lens element with positive refractive power has an image-side surface being convex in a paraxial region thereof. The fourth lens element has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The fifth lens element has an image-side surface being convex in a paraxial region thereof. The sixth lens element with negative refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof and having an inflection point.