Six-Element Optical Lens Assembly for Low-Light Resolution
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Solution Overview
Problem
Conventional optical systems with large apertures for low-light conditions often compromise image resolution, failing to achieve a balance between sufficient light intake and high image quality, especially in compact miniaturized systems.
Innovation Solution
A photographing optical lens assembly comprising six lens elements with specific refractive powers and surface curvatures, including negative and positive refractive power elements, concave and convex surfaces, optimized for a balance between light transmission, aberration correction, and compact size, ensuring high image quality and sufficient light intake.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the aperture size is increased to provide sufficient light intake for low-light conditions, then the light intake is improved, but the image resolution deteriorates
Solution Approach 1:
The optical lens assembly is divided into six distinct lens elements with different refractive powers and surface curvatures. This segmentation allows each element to perform specific optical functions, collectively achieving both large aperture for light intake and high image resolution that cannot be achieved with a single lens element
Solution Approach 2:
Different lens elements are designed with specific local properties: the first lens element has negative refractive power with a concave image-side surface, while subsequent elements have varying convex and concave surfaces. This local quality differentiation enables optimal light control at different stages of the optical path, maintaining resolution while achieving large aperture
2Volume of moving object
If the optical system is miniaturized to reduce device size, then the compactness is improved, but the image quality deteriorates
Solution Approach 1:
The six lens elements are arranged in a compact nested configuration along the optical axis, with each element positioned closely to the next. This nesting approach maximizes the use of available space, achieving miniaturization while maintaining the complex multi-element structure necessary for high image quality
Solution Approach 2:
The patent utilizes the axial dimension efficiently by optimizing the spacing and positioning of lens elements along the optical axis. This dimensional optimization allows the compact optical system to achieve high image quality without increasing the lateral footprint, effectively miniaturizing the system while preserving performance
3Illumination intensity
If the aperture size is increased to improve light intake, then the light transmission is improved, but the device complexity increases
Solution Approach 1:
Each lens element serves multiple functions: the first lens element with negative refractive power not only contributes to the overall light gathering capability but also helps control aberrations. Subsequent elements with varying surface curvatures simultaneously manage focus, correction of optical distortions, and maintenance of image quality. This multi-functionality allows the system to achieve large aperture and high light transmission without requiring additional separate components, thereby limiting the increase in device complexity
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 optical lens assembly provides enhanced image resolution and light intake while maintaining a compact size, effectively addressing the trade-off between aperture size and image quality in low-light conditions.
Implementation Method 1
a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element... The first lens element with negative refractive power...
Data Source
AI summary
A photographing optical lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element with negative refractive power has an image-side surface being concave. The second lens element has an image-side surface being concave. The fourth lens element has an image-side surface being convex. The sixth lens element has an object-side surface being concave. The photographing optical lens assembly has a total of six lens elements.