Six-Lens Optical Imaging Assembly for Low-Light Sensitivity
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Solution Overview
Problem
Existing optical imaging lens assemblies with high F-numbers, such as those above F/2.0, struggle to maintain imaging quality in low-light conditions and are sensitive to hand trembling, failing to meet the higher imaging requirements of portable electronic devices.
Innovation Solution
An optical imaging lens assembly comprising six lenses with specific refractive powers and surface types, including positive and negative refractive powers, convex and concave surfaces, and carefully distributed center thicknesses and spacings, which reduces sensitivity and enhances light admission, achieving a smaller F-number (e.g., F/1.8) for improved imaging in dark environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the F-number is increased to 2.0 or above for miniaturization, then the lens assembly size is reduced, but the imaging quality in low-light conditions deteriorates
Solution Approach 1:
The patent changes the F-number parameter from 2.0 or above to below 2.0 (specifically achieving F/1.8), which directly increases light admission capability while maintaining miniaturization. This is accomplished through optimized lens design with six elements having specific refractive powers and surface curvatures that enable smaller focal length and aperture dimensions while admitting more light.
Solution Approach 2:
The patent applies different refractive powers to different lens elements (positive, negative, and combined positive-negative configurations) to optimize local light transmission properties. The first lens has positive refractive power, the second has negative refractive power, and subsequent lenses have varying powers, creating localized optical corrections that improve overall light admission and image quality in compact form.
2Volume of moving object
If the F-number is increased to 2.0 or above for miniaturization, then the lens assembly size is reduced, but the sensitivity to hand trembling increases
Solution Approach 1:
The patent changes the F-number parameter to below 2.0, which increases depth of field and reduces the impact of hand trembling on image quality. The specific optical configuration with six lens elements creates a more tolerant system to minor vibrations while maintaining compact size suitable for portable devices.
Solution Approach 2:
Instead of accepting high sensitivity as inevitable in miniaturized lenses, the patent inverts the approach by designing optical parameters (refractive powers, surface curvatures, element spacing) that actively reduce sensitivity to hand trembling through increased depth of field and optimized light path geometry.
3Manufacturing precision
If more lens elements are added to improve imaging quality, then the imaging performance is enhanced, but the device complexity increases
Solution Approach 1:
The patent optimizes parameters of six lens elements including refractive powers, surface curvatures, and spacing to achieve high imaging quality. The specific configuration (positive, negative, positive-negative, positive powers distributed across elements) provides aberration correction and sharp focus without requiring additional elements, balancing complexity and performance.
Solution Approach 2:
The patent segments the optical system into six functional lens elements with specific refractive power assignments (first: positive, second: negative, third: positive or negative, fourth: positive, fifth: positive or negative, sixth: negative). This segmentation allows each element to address specific optical aberrations independently, achieving high imaging quality through coordinated function of multiple specialized components rather than a single complex element.
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 assembly achieves high image quality, miniaturization, and reduced sensitivity, enabling better performance in low-light conditions and compact form factors suitable for portable electronic devices.
Implementation Method 1
The first lens has a positive refractive power
Implementation Method 2
Each of the second lens, the third lens, and the sixth lens may have a negative refractive power
Implementation Method 3
An object-side surface of the first lens and an image-side surface of the fourth lens may both be convex surfaces
Implementation Method 4
An image-side surface of the second lens and an image-side surface of the sixth lens may both be concave surfaces
Data Source
AI summary
The present disclosure discloses an optical imaging lens assembly. The optical imaging lens assembly includes, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has a positive refractive power, and each of the second lens, the third lens, and the sixth lens has a negative refractive power. At least one of the fourth lens or the fifth lens has a positive refractive power. The object-side surface of the first lens and the image-side surface of the fourth lens are convex surfaces. The image-side surface of the second lens and the image-side surface of the sixth lens are concave surfaces. A total effective focal length f of the optical imaging lens assembly and a radius of curvature R9 of an object-side surface of the fifth lens satisfy: f/|R9|≤0.35.