Seven-Lens Optical Module Layout for Compact Macro Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical lenses for terminal devices face challenges in balancing miniaturization with macro photography and high magnification while maintaining a large aperture, which is crucial for capturing fine details in small spaces.
Innovation Solution
The optical lens design includes seven lenses with specific refractive powers and surface shapes, such as convex and concave configurations, to achieve a compact design with a large aperture and macro imaging capabilities, supported by conditional expressions to optimize aberration correction and light intake.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the total length of the optical lens is reduced to miniaturize the image module, then the device size is reduced, but the aperture size and macro imaging capability are compromised
Solution Approach 1:
The optical lens is divided into seven individual lenses with different refractive powers and surface shapes. Each lens is optimized to perform specific functions: the first lens provides positive refractive power for light convergence, the second lens corrects aberrations with a convex object side surface, the third lens converges light gently with convex surfaces, the fourth lens provides refractive power, the fifth lens corrects aberrations with a concave object side surface, the sixth lens corrects spherical aberration and astigmatism with mixed convex-concave surfaces, and the seventh lens reduces exit angle with a concave imaging side surface. This segmentation allows the system to achieve both compact size and large aperture capability by distributing optical functions across multiple optimized elements.
Solution Approach 2:
Each lens in the seven-lens system is designed with specific local optical properties tailored to its position and function. The first lens has positive refractive power for initial light convergence, while subsequent lenses have varying combinations of convex and concave surfaces to correct specific aberrations at different stages of light transmission. The sixth lens, for example, has a convex object side surface and concave imaging side surface to specifically address spherical aberration and astigmatism. This local optimization of optical quality at each lens position enables the compact system to maintain large aperture performance.
2Volume of moving object
If the total length of the optical lens is reduced to miniaturize the image module, then the device size is reduced, but the macro imaging capability is compromised
Solution Approach 1:
The optical lens is divided into seven individual lenses with different refractive powers and surface shapes. Each lens is optimized to perform specific functions: the first lens provides positive refractive power for light convergence, the second lens corrects aberrations with a convex object side surface, the third lens converges light gently with convex surfaces, the fourth lens provides refractive power, the fifth lens corrects aberrations with a concave object side surface, the sixth lens corrects spherical aberration and astigmatism with mixed convex-concave surfaces, and the seventh lens reduces exit angle with a concave imaging side surface. This segmentation allows the system to achieve both compact size and large aperture capability by distributing optical functions across multiple optimized elements.
Solution Approach 2:
The system optimizes multiple parameters including the refractive power of each lens, the curvature radius of each surface, and the spacing between lenses. The conditional expressions specify precise ranges for these parameters to ensure optimal macro imaging quality. For example, the refractive power of the first lens is controlled within specific ranges, and the curvature radius of the second lens's object side surface is precisely defined. These parameter optimizations enable the compact seven-lens system to achieve superior macro imaging capability that would be difficult to obtain with fewer elements.
3Illumination intensity
If the aperture is enlarged to improve light intake and imaging quality, then the imaging capability is improved, but the device size increases
Solution Approach 1:
The optical lens is divided into seven individual lenses with different refractive powers and surface shapes. Each lens is optimized to perform specific functions: the first lens provides positive refractive power for light convergence, the second lens corrects aberrations with a convex object side surface, the third lens converges light gently with convex surfaces, the fourth lens provides refractive power, the fifth lens corrects aberrations with a concave object side surface, the sixth lens corrects spherical aberration and astigmatism with mixed convex-concave surfaces, and the seventh lens reduces exit angle with a concave imaging side surface. This segmentation allows the system to achieve both compact size and large aperture capability by distributing optical functions across multiple optimized elements.
Solution Approach 2:
The system optimizes multiple parameters including the refractive power of each lens, the curvature radius of each surface, and the spacing between lenses. The conditional expressions specify precise ranges for these parameters to ensure optimal macro imaging quality. For example, the refractive power of the first lens is controlled within specific ranges, and the curvature radius of the second lens's object side surface is precisely defined. These parameter optimizations enable the compact seven-lens system to achieve superior macro imaging capability that would be difficult to obtain with fewer elements.
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 lens design enables high pixel, high clarity imaging with a large field of view and sufficient light intake, suitable for macro photography and low-light environments, while maintaining a compact size.
Implementation Method 1
The first lens has refractive power. The second lens has refractive power, and an object side surface of the second lens is convex near the optical axis. The third lens has positive refractive power, an object side surface and an imaging side surface of the third lens are both convex near the optical axis.
Data Source
AI summary
An optical lens includes: a first lens, a second lens, and a fourth lens each having refractive power, a third lens and a sixth lens each having positive refractive power, a fifth lens and a seventh lens each having negative refractive power. An object side surface of the second lens, an object side surface and an imaging side surface of the third lens, and an object side surface of the sixth lens are both convex near the optical axis. An object side surface of the fifth lens, an imaging side surface of the sixth lens, and an imaging side surface of the seventh lens are both concave near the optical axis. The optical lens satisfies: 2.6<FNO<4, and 50 deg<FOV<90 deg. FNO is an aperture number of the optical lens, and FOV is the maximum field of view of the optical lens.