Optical Imaging lens
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Solution Overview
Problem
Existing optical imaging lenses face challenges in achieving a small F-number, small volume, and favorable optical performance while maintaining a zoom effect without causing discontinuity in picture resolution or field of view during focal length adjustments.
Innovation Solution
The optical imaging lens design includes seven lens elements with specific concave/convex curved surfaces and adjustable air gaps, allowing for a small F-number and small volume while maintaining good optical performance across different focal lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple fixed-focus lenses are used to achieve zoom effect, then different photographic needs can be met, but the arrangement consumes more space and causes discontinuity in picture resolution or field of view
Solution Approach 1:
The patent combines multiple lens functions into a single integrated optical imaging lens with seven lens elements. This merging approach eliminates the need for separate fixed-focus lenses, reducing the overall space consumption while maintaining continuous zoom capability without resolution discontinuities.
Solution Approach 2:
The patent implements adjustable air gaps between lens elements that can be dynamically changed to achieve different focal lengths and zoom ratios. This dynamic adjustment mechanism allows continuous focal length variation within a single lens structure, providing zoom functionality without the space and discontinuity issues of multiple fixed lenses.
2Illumination intensity
If a small F-number is achieved to increase luminous flux, then more light can be captured, but the lens structure becomes more complex
Solution Approach 1:
The patent applies local quality by giving different lens elements specific refracting power characteristics (positive or negative) and specific surface curvature features (convex periphery or optical axis region). This localized optimization allows the system to achieve small F-number for increased luminous flux while managing structural complexity through targeted design features rather than uniform complexity throughout.
3Volume of stationary object
If the lens volume is reduced to make the device compact, then portability is improved, but optical performance may deteriorate
Solution Approach 1:
The patent employs a nested arrangement where seven lens elements are closely integrated in sequence along the optical axis with adjustable air gaps. This nested compact structure reduces overall lens volume for portability while maintaining proper optical spacing and relationships, ensuring good optical performance is preserved despite the reduced 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 design achieves a small F-number and small volume with improved optical performance, enabling continuous zooming without resolution or field of view discontinuities.
Implementation Method 1
Each of the first lens element to the seventh lens element includes an object-side surface facing the object side and allowing an imaging ray to pass through and an image-side surface facing the image side and allowing the imaging ray to pass through
Data Source
AI summary
An optical imaging lens includes first to seventh lens elements sequentially arranged along an optical axis from an object side to an image side, and each including an object-side surface facing the object side and allowing an imaging ray to pass through and an image-side surface facing the image side and allowing the imaging ray to pass through. The first lens element has positive refracting power. A periphery region of the object-side surface of the fourth lens element is convex. The fifth lens element has positive refracting power. The sixth lens element has positive refracting power. An optical axis region of the object-side surface of the seventh lens element is convex. Lens elements of the optical imaging lens are only the seven lens elements described above. The optical imaging lens has at least one adjustable air gap.