Six-Element Imaging Lens with Concave Sixth Surface
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Solution Overview
Problem
Conventional miniaturized optical systems face challenges in achieving high image quality due to limited light entry, leading to poor image brightness and size constraints, making them unsuitable for various electronic devices.
Innovation Solution
An imaging lens system comprising six lens elements with specific refractive powers and surface configurations, including a sixth lens element with a concave image-side surface and inflection points, optimized to enhance light convergence and reduce size, while maintaining high image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the optical system is miniaturized, then the size is reduced, but the amount of incident light decreases leading to low image brightness
Solution Approach 1:
The patent employs a six-element lens configuration where each lens element is strategically positioned and sized to maximize light gathering within a compact form factor. The lenses are nested in sequence with optimized spacing, allowing the optical system to maintain small overall volume while each element contributes to light collection efficiency
Solution Approach 2:
The patent optimizes multiple parameters including lens curvature radii, thicknesses, and refractive indices to achieve high image brightness in a miniaturized system. Specific parameter ranges are defined for each lens element (e.g., focal length ratios, Abbe numbers) to ensure sufficient light transmission and convergence while maintaining compact dimensions
2Illumination intensity
If the optical system is designed for high image quality, then image brightness improves, but the system size increases
Solution Approach 1:
The six lens elements are arranged in a compact nested configuration where each element serves multiple functions: light gathering, aberration correction, and focus control. This nested arrangement achieves high image brightness without proportionally increasing system volume
Solution Approach 2:
Each lens element in the six-element system performs multiple optical functions simultaneously. For example, the first lens element both gathers light and begins aberration correction, while the sixth lens element with its inflection point contributes to both focus control and distortion correction, maximizing functionality within limited space
3Ease of operation
If conventional optical systems are miniaturized, then portability improves, but image quality deteriorates due to limited light entry
Solution Approach 1:
The patent defines specific parameter ranges for each lens element including focal lengths (f1, f2, f3, f4, f5), curvature radii (R1, R2, ..., R12), thicknesses (d1, d2, ..., d12), and material properties (Abbe numbers V1-V6, refractive indices n1-n6) to optimize image quality while maintaining miniaturization. These parameter constraints ensure high manufacturing precision and consistent image quality across production batches
Solution Approach 2:
The compact nested six-element design enables the optical system to maintain high image quality with sufficient light gathering capability while achieving the miniaturization required for portable electronic 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 solution increases image brightness and compactness, enabling the imaging lens system to be applicable in a wide range of electronic devices with improved image quality and reduced production costs.
Implementation Method 1
The sixth lens element has an image-side surface being concave in a paraxial region thereof, and the image-side surface of the sixth lens element has at least one inflection point
Implementation Method 2
an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, an Abbe number of the third lens element is V3, an Abbe number of the fourth lens element is V4
Data Source
AI summary
An imaging lens system includes six lens elements, which are, in order from an object side to an image side: 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. The sixth lens element has an image-side surface being concave in a paraxial region thereof. The image-side surface of the sixth lens element has at least one inflection point.