Six-Lens Optical Imaging Module for Compact Wide-Angle Aperture
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional optical imaging lenses in mobile phones fail to achieve a balance between miniaturization, large aperture, and wide-angle characteristics, leading to suboptimal shooting experiences with limited ability to capture scenery and portrait images effectively.
Innovation Solution
The optical imaging lens design consists of six lenses with specific refractive powers, surface types, and carefully configured center thicknesses and spacing distances, including aspherical surfaces, to achieve a large image surface, wide angle, and large aperture, allowing for better scenery capture and proportional compression of backgrounds in portraits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the optical imaging lens is miniaturized to fit portable devices, then the device size is reduced, but the aperture and image surface area are limited
Solution Approach 1:
The patent employs aspherical surfaces on multiple lens elements (first lens object-side surface, second lens image-side surface, third lens object-side surface, fourth lens image-side surface, fifth lens object-side surface, and sixth lens image-side surface) to optimize light convergence and expand the effective image surface area within a compact form factor, resolving the contradiction between miniaturization and image surface area
Solution Approach 2:
The optical imaging lens integrates multiple functions into a compact six-element structure: wide-angle capability (FOV≥75°), large aperture (F≤1.8), and large image surface area, achieving multi-functional performance in a miniaturized design that satisfies portable device requirements
2Illumination intensity
If the aperture is increased to improve light gathering capability, then the shooting quality is improved, but the lens size increases
Solution Approach 1:
The patent achieves large aperture (F≤1.8) in a miniaturized lens by optimizing multiple parameters simultaneously: the focal length (1.8≤TTL/ImgH<3.0), the curvature radii of aspherical surfaces, the spacing between lens elements, and the refractive indices of different lens materials, allowing high light gathering capability without proportionally increasing size
Solution Approach 2:
Aspherical surfaces on the lens elements enable more efficient light convergence, allowing the system to achieve F≤1.8 aperture ratio with a compact overall structure, as the aspherical geometry optimizes light paths to maximize aperture efficiency within limited space
3Area of stationary object
If the field of view is widened to capture more scenery, then the imaging coverage is improved, but the distortion and aberrations increase
Solution Approach 1:
The patent divides the optical system into six distinct lens elements with specific refractive power distributions (positive, negative, and combined focal lengths), where each element is optimized to correct specific types of aberrations while contributing to the overall wide field of view, enabling FOV≥75° with controlled distortion
Solution Approach 2:
Multiple aspherical surfaces are strategically positioned on different lens elements to correct field curvature and distortion across the wide field of view, maintaining imaging precision at the periphery while achieving broad angular coverage
4Manufacturing precision
If a six-lens configuration is used to achieve large aperture and wide angle, then the imaging performance is improved, but the device complexity increases
Solution Approach 1:
Each of the six lens elements is designed with multi-functionality: they collectively provide wide-angle capability, large aperture, and aberration correction, with each element contributing to multiple performance aspects simultaneously, justifying the increased element count through enhanced overall functionality
Solution Approach 2:
The strategic use of aspherical surfaces on specific lens elements (first, second, third, fourth, fifth, and sixth lenses) provides high-value optical correction that would require multiple additional spherical elements to achieve, thereby reducing the overall complexity relative to the performance gained
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
This configuration results in improved imaging quality with enhanced field of view, reduced aberrations, and a more hierarchical image representation, accommodating more scenery while maintaining a finely detailed portrait with a 'long-leg' effect.
Implementation Method 1
a first lens has a positive refractive power; a second lens has a positive refractive power; a third lens, an object-side surface thereof may be a concave surface, and an image-side surface thereof may be a convex surface; a fourth lens; a fifth lens has a positive refractive power; and a sixth lens has a negative refractive power
Data Source
AI summary
The disclosure discloses an optical imaging lens, which sequentially includes from an object side to an image side along an optical axis: a first lens has a positive refractive power; a second lens has a positive refractive power; a third lens, an object-side surface thereof is a concave surface, and an image-side surface thereof is a convex surface; a fourth lens; a fifth lens has a positive refractive power; a sixth lens has a negative refractive power; TTL is a distance from an object-side surface of the first lens to an imaging surface of the optical imaging lens on the optical axis, ImgH is a half the diagonal length of an effective pixel area on the imaging surface of the optical imaging lens, and TTL and ImgH satisfy TTL/ImgH<1.3; and TTL satisfies TTL<5.0 mm.