Eight-Lens Optical Imaging System Aberration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Optical imaging lenses face challenges in achieving a balance between reducing system length and maintaining good imaging quality, particularly in mobile devices where a smaller F-number and greater image height are desired while minimizing thickness.
Innovation Solution
The design incorporates a specific arrangement of eight lens elements with concave-convex surface structures and refracting powers, satisfying conditions such as |V4−V5|≥30.000 and (G67+T7)/(G56+T6)≥1.500, to achieve a greater image height while reducing the F-number and system length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of optical lens elements is increased to improve imaging quality, then optical aberrations are reduced, but the system length increases making it difficult to reduce device thickness
Solution Approach 1:
The patent applies parameter changes by precisely controlling the Abbe numbers of lens elements (|V4-V5|≥30) and the thickness-to-air-gap ratio ((G67+T7)/(G56+T6)≥1.5), which allows the optical system to achieve superior aberration correction with only eight lens elements, thereby maintaining compact system length while improving imaging quality
Solution Approach 2:
The patent uses composite material principles by combining lens elements with different Abbe numbers (high dispersion and low dispersion materials) in a specific configuration. This allows the system to correct chromatic and spherical aberrations effectively without increasing the total number of elements, thus maintaining a compact form factor while achieving high imaging quality
2Illumination intensity
If the F-number is reduced to increase luminous flux, then more light is captured for night shooting, but the system becomes less compact
Solution Approach 1:
The patent achieves a small F-number (high luminous flux) while maintaining compact dimensions by optimizing parameters such as the air gaps between lens elements (G67, G56) and their thicknesses (T7, T6), ensuring the ratio (G67+T7)/(G56+T6)≥1.5. This allows light to pass through efficiently without requiring a longer optical path
3Area of stationary object
If the image height is increased to enlarge pixel size for night shooting, then the field of view is improved, but the system length increases
Solution Approach 1:
The patent achieves greater image height with reduced system length by optimizing the ratio (G67+T7)/(G56+T6)≥1.5, which controls the optical path geometry. This parameter optimization allows the light cones to expand sufficiently for larger image height without proportionally increasing the axial length of the system
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 effectively alleviates spherical and chromatic aberrations, maintains good imaging quality, and reduces the system length, making it suitable for compact devices like mobile phones and digital cameras.
Implementation Method 1
Each of the first lens element to the eighth lens element includes an object-side surface facing the object side and allowing imaging rays to pass through and an image-side surface facing the image side and allowing the imaging rays to pass through
Data Source
AI summary
An optical imaging lens is provided. The optical imaging lens includes a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element sequentially arranged along an optical axis from an object side to an image side. Each of the first lens element to the eighth lens element includes an object-side surface facing the object side and allowing imaging rays to pass through and an image-side surface facing the image side and allowing the imaging rays to pass through. Lens elements of the optical imaging lens are only the eight lens elements described above, and satisfy the conditions |V4−V5|≥30.000 and (G67+T7)/(G56+T6)≥1.500.