Six-Lens Optical Imaging System for Ultra-Thin High-Resolution Camera Modules
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge is to design an optical imaging lens that achieves an ultra-large image surface and ultra-thin design while maintaining high imaging quality and low sensitivity, suitable for high-end camera phones with increasing pixel density and thickness constraints.
Innovation Solution
The optical imaging lens consists of six lenses, carefully arranged along the optical axis with specific refractive powers and surface types. The lens configuration includes a first lens with positive refractive power, a second lens with negative or positive refractive power, a third lens with positive or negative refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power. The lens surfaces are optimized with aspherical surfaces to minimize aberrations and improve manufacturability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lenses is increased to achieve ultra-large image surface and ultra-high definition, then the imaging quality and image surface size are improved, but the camera module height and overall thickness increase
Solution Approach 1:
The optical imaging lens divides the imaging system into six distinct lens elements with alternating positive and negative refractive powers. Each lens element is optimized for specific functions: the first lens (positive power) provides primary light convergence, the second lens (negative power) corrects aberrations, the third lens (positive power) enhances focus, the fourth lens (negative power) controls field curvature, the fifth lens (positive power) sharpens the image, and the sixth lens (negative power) flattens the image surface. This segmentation allows high-quality imaging with a controlled total track length
Solution Approach 2:
The patent employs precise control of key parameters including the ratio of total track length to image height (TTL/ImgH ≤ 1.0), the ratio of focal length to image height (f/ImgH between 0.8-1.2), and the alternating refractive power configuration. The specific arrangement of positive and negative power lenses with optimized curvature radii and thicknesses enables achieving ultra-large image surface with reduced overall height
2Manufacturing precision
If more lenses are added to increase resolution and image surface, then the imaging performance is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The six-lens system is segmented into functional groups: the first three lenses form the primary imaging group, while the fourth, fifth, and sixth lenses form the correction and surface-flattening group. This functional segmentation simplifies the design process and manufacturing by allowing each group to be optimized independently for its specific purpose
Solution Approach 2:
The patent combines multiple optical functions into a compact six-lens architecture. The alternating positive-negative power configuration merges light convergence, aberration correction, field curvature control, and image surface flattening into a unified system that achieves high resolution without proportionally increasing complexity
3Length of stationary object
If the lens configuration is optimized for ultra-thin design, then the camera module height is reduced, but the imaging quality and sensitivity may deteriorate
Solution Approach 1:
The patent maintains imaging quality in ultra-thin design through precise parameter control: the TTL/ImgH ratio is kept ≤ 1.0, the f/ImgH ratio is optimized between 0.8-1.2, and the Semi-FOV is controlled between 40-60 degrees. The alternating positive-negative refractive power configuration with specifically optimized curvature radii and thicknesses ensures high imaging quality while achieving reduced height
Solution Approach 2:
The six-lens system is segmented into functional groups where the first three lenses provide primary imaging and the last three lenses provide correction and surface flattening. This segmentation allows the system to achieve ultra-thin profile while maintaining high imaging quality through distributed optical functions
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 enables the optical imaging lens to achieve an ultra-large image surface, ultra-thin design, high imaging quality, and low sensitivity, while ensuring compactness and high formability and manufacturability of each lens, thereby improving the yield of camera modules and maintaining high infinite-distance and finite-distance imaging performance.
Implementation Method 1
a first lens having positive refractive power; a second lens having refractive power; a third lens having refractive power; a fourth lens having 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 having positive refractive power; a second lens having refractive power; a third lens having refractive power; a fourth lens having negative refractive power, wherein an object-side surface thereof is a concave surface, while an image-side surface is a convex surface; a fifth lens having positive refractive power; and a sixth lens having negative refractive power, wherein an object-side surface thereof is a convex surface. 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 of a diagonal length of an effective pixel region on the imaging surface of the optical imaging lens, TTL and ImgH meet 4.0 mm<ImgH/(TTL/ImgH)<7.0 mm. Therefore, the optical imaging lens has high imaging quality.