Eight-Lens Imaging Optics for Wide-Angle Miniaturized Cameras
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional optical systems struggle to balance high image quality, low sensitivity, proper aperture size, miniaturization, and wide field of view requirements due to the scaling down of pixel size in image sensors and increasing functionality demands.
Innovation Solution
An imaging optical lens system with eight lens elements, each with specific refractive powers and surface shapes, including concave and convex surfaces with critical points, optimized by conditions such as focal length ratios and Abbe number combinations, to enhance field of view, correct aberrations, and reduce size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional optical systems are used, then the structure is simple, but the image quality is insufficient and the field of view is limited
Solution Approach 1:
The optical system is divided into eight independent lens elements with specific refractive powers and surface shapes. Each lens element is designed with particular characteristics (positive or negative refractive power, convex or concave surfaces) to address specific aberrations and optimize different aspects of image quality, allowing the complex function to be segmented into manageable components
Solution Approach 2:
Different regions of the lens elements have different surface shapes and refractive properties. The patent specifies that at least one lens element has an aspheric surface with critical points in the off-axis region, creating local variations in optical properties to correct field curvature and distortion while maintaining simple overall structure
2Illumination intensity
If the aperture size is increased to improve image quality, then the illuminance is improved, but the sensitivity increases and the size increases
Solution Approach 1:
The patent optimizes the refractive powers and curvature radii of all eight lens elements to achieve proper illuminance distribution. By carefully selecting the focal lengths and surface curvatures, the system achieves good illuminance without requiring excessive aperture size, thus avoiding increased sensitivity and overall system size
3Volume of moving object
If the optical system is miniaturized, then the size is reduced, but the field of view becomes limited and image quality deteriorates
Solution Approach 1:
The patent employs aspheric surfaces on at least one lens element, characterized by critical points in the off-axis region. These curved surfaces enable the compact optical system to achieve a wide field of view by correcting field curvature and distortion, which would otherwise require larger conventional spherical lens systems
Solution Approach 2:
The eight lens elements are arranged in a compact configuration along the optical path, with each element positioned to optimize the overall system performance. The nested arrangement of multiple lens elements with alternating positive and negative refractive powers allows for miniaturization while maintaining adequate field of view through careful optical design
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 wide field of view up to 90 degrees, corrects various aberrations, and maintains a compact design while supporting high image quality and sensitivity, suitable for miniaturized electronic devices.
Implementation Method 1
The fourth lens element has negative refractive power. The fifth lens element has positive refractive power.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An imaging optical lens system includes a first lens element (E1), a second lens element (E2), a third lens element (E3), a fourth lens element (E4), a fifth lens element (E5), a sixth lens element (E6), a seventh lens element (E7) and an eighth lens element (E8), in order from an object side to an image side along an optical path. The first lens element (E1) has an object-side surface being concave in a paraxial region thereof. The fourth lens element (E4) has negative refractive power. The fifth lens element (E5) has positive refractive power. At least one lens surface of at least one lens element of the imaging optical lens system has at least one critical point (C) in an off-axis region thereof.