Optical Imaging Lens Assembly for Miniaturization and Low Sensitivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current optical imaging lens assemblies for portable electronic devices face challenges in achieving high image quality, miniaturization, and low sensitivity while maintaining a large aperture, especially in low-light conditions, due to limitations in F-number and lens configuration.
Innovation Solution
The optical imaging lens assembly consists of two lens groups with specific refractive powers and surface types, including aspheric surfaces, optimized to achieve a positive combined refractive power, balanced aberrations, and reduced system sensitivity, with a configuration that allows for a larger aperture and miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the F-number is reduced to increase light admission, then the aperture is enlarged, but the lens assembly size increases and miniaturization is compromised
Solution Approach 1:
The lens assembly is divided into multiple lens groups (first lens group with positive refractive power, second lens group with negative refractive power, and third lens group) that work together to achieve both large aperture and compact size. Each group contributes differently to light gathering and focal length control, resolving the contradiction between aperture size and overall assembly dimensions.
Solution Approach 2:
The patent employs aspheric surfaces with specific curvature radii and conic coefficients, along with optimized refractive indices and thickness ratios, to achieve high light admission while maintaining a compact form factor. The parameter optimization allows the system to gather more light without proportionally increasing the overall lens assembly volume.
2Measurement precision
If more lenses are added to improve image quality, then the imaging performance is enhanced, but the device complexity and size increase
Solution Approach 1:
The optical system is segmented into functional groups: a first lens group for primary light gathering, a second lens group for aberration correction, and a third lens group for fine-tuning image quality. This segmentation allows each group to be optimized for its specific function, achieving high image quality without requiring a single complex lens design.
Solution Approach 2:
Each lens group serves multiple functions: the first lens group provides both light gathering and initial focusing, the second lens group corrects aberrations while contributing to the overall focal length, and the third lens group refines image quality. This multi-functionality reduces the need for additional specialized components, managing device complexity.
3Illumination intensity
If the aperture is enlarged to improve low-light imaging, then the light admission increases, but the sensitivity to manufacturing errors and aberrations increases
Solution Approach 1:
The patent specifies optimized parameter ranges including f-number between 1.4-2.0, specific refractive index ranges for different lens groups, and controlled thickness ratios. These parameter optimizations ensure that the enlarged aperture design maintains tolerance to manufacturing variations by balancing light gathering capability with aberration control across the specified ranges.
Solution Approach 2:
The multi-group lens configuration provides inherent feedback mechanisms where each lens group compensates for errors introduced by previous groups. The second lens group with negative refractive power corrects over-corrections from the first group, and the third group fine-tunes the final image, creating a self-correcting system that reduces sensitivity to individual manufacturing errors.
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 enables improved image quality, miniaturization, and reduced sensitivity, enhancing the imaging experience in low-light conditions by effectively managing aberrations and increasing the aperture, making it suitable for high-end portable electronic products.
Implementation Method 1
An object-side surface and an image-side surface of the at least one optical element are aspheric surfaces
Implementation Method 2
The optical imaging lens assembly sequentially includes, from an object side to an image side along an optical axis, a first lens group and a second lens group
Data Source
AI summary
The present disclosure discloses an optical imaging lens assembly. The optical imaging lens assembly sequentially includes, from an object side to an image side along an optical axis, a first lens group and a second lens group. The first lens group includes a first lens having a positive refractive power and a second lens having a negative refractive power. The second lens group includes at least one optical element and at least one lens having a refractive power, where an object-side surface and an image-side surface of the at least one optical element are aspheric surfaces. An effective focal length f1 of the first lens and a combined focal length f12 of the first lens and the second lens satisfy: f1/f12>0.65.