Six-Element Optical Lens Assembly Balancing Compactness and Sensitivity
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Solution Overview
Problem
Conventional compact optical systems face challenges in achieving miniaturization, high image quality, and improved manufacturing yield rates due to the arrangement of refractive power in the first two lens elements, which increases sensitivity and affects manufacturing yield.
Innovation Solution
An image capturing optical lens assembly with six lens elements, including specific refractive powers and surface configurations, such as convex and concave surfaces, and a stop between the imaged object and the third lens element, to balance refractive power distribution and correct aberrations, thereby reducing sensitivity and improving manufacturing yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the refractive power is arranged in the first two lens elements at the light incident side, then the system achieves compact size, but the sensitivity increases and manufacturing yield rate decreases
Solution Approach 1:
The patent divides the refractive power distribution across six lens elements rather than concentrating it in the first two elements. Each lens element is assigned a specific refractive power value (positive or negative) to achieve a balanced distribution, which reduces sensitivity while maintaining compact size and improving manufacturing yield rate
Solution Approach 2:
The patent changes the refractive power parameters of individual lens elements by assigning specific positive or negative values to each element. This parameter optimization balances the overall refractive power distribution, reducing system sensitivity and improving manufacturing yield while maintaining compact dimensions
2Volume of moving object
If the refractive power is arranged in the first two lens elements at the light incident side, then the system achieves compact size, but the image quality deteriorates due to increased sensitivity
Solution Approach 1:
The patent segments the refractive power across six lens elements with specific positive and negative values assigned to each element. This distribution reduces sensitivity and improves image quality by preventing the excessive refractive power concentration that occurs when only the first two elements have high refractive power
Solution Approach 2:
The patent applies different refractive power characteristics to different lens elements locally. Each element has a specific refractive power value (positive or negative) optimized for its position in the optical path, which improves overall image quality while maintaining compact system size
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 solution achieves a compact optical system with high image quality, reduced sensitivity, and enhanced manufacturing yield by balancing refractive power and correcting aberrations, using aspheric surfaces and appropriate stop placement.
Implementation Method 1
a first lens element with refractive power having an object-side surface being convex in a paraxial region thereof; a second lens element having positive refractive power
Data Source
AI summary
This disclosure provides an image capturing optical lens assembly including, in order from an object side to an image side: a first lens element with refractive power having an object-side surface being convex in a paraxial region thereof a second lens element having positive refractive power; a third lens element with refractive power having an image-side surface being concave in a paraxial region thereof a fourth lens element with refractive power having an image-side surface being concave in a paraxial region thereof, wherein both surfaces thereof being aspheric; a fifth lens element with refractive power having an object-side surface being concave in a paraxial region thereof and a sixth lens element with refractive power having an image-side surface being concave in a paraxial region thereof, wherein both surfaces thereof being aspheric, and the image-side surface having at least one convex shape in an off-axis region thereof.