Eleven-Lens Imaging Layout for Slim High-Resolution Cameras
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Solution Overview
Problem
There is a need for optical imaging systems in portable terminals that achieve high resolution while being slim and miniaturized, as the form factor of these devices has decreased, and existing systems may not adequately address this requirement.
Innovation Solution
An optical imaging system comprising eleven lenses, including specific refractive power, Abbe number, and thickness relationships, with aspherical surfaces, to achieve high resolution and compactness, while maintaining optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lenses is increased to achieve high resolution, then imaging quality is improved, but the overall length and volume of the system increase
Solution Approach 1:
The patent implements a nested lens configuration where the first through sixth lenses are arranged in a compact sequence with the seventh through eleventh lenses positioned to overlap or nest within the optical path of the earlier lenses. This nesting approach allows eleven lenses to be packed into a shorter overall length by utilizing three-dimensional spatial arrangement rather than simple linear sequencing.
Solution Approach 2:
The patent transitions from a traditional one-dimensional linear arrangement of lenses to a multi-dimensional configuration where lenses are positioned in both longitudinal and radial directions. The conditional equations specify relationships between focal lengths, Abbe numbers, and axial positions that enable lenses to be distributed in three-dimensional space, effectively using additional spatial dimensions to reduce the projected length of the system.
2Volume of moving object
If lens elements with high refractive index and low Abbe number are used, then compactness is improved, but chromatic aberration increases
Solution Approach 1:
The patent applies local quality by assigning specific refractive index and Abbe number ranges to different lens groups rather than using uniform materials throughout. The first through fifth lenses have different material specifications than the sixth through eleventh lenses, with each group optimized for its specific position in the optical path. This localized material optimization allows compactness in certain regions while controlling chromatic aberration in others.
Solution Approach 2:
The patent employs composite material strategies by combining lenses with different refractive indices and Abbe numbers in specific configurations. The conditional equations specify that at least one lens has refractive index greater than 1.63 with Abbe number less than 24, while other lenses have different material properties. This composite approach allows the system to achieve compactness through high-index materials while using lower-index, higher-Abbe-number lenses in strategic positions to correct chromatic aberration.
3Measurement precision
If aspherical surfaces are implemented, then optical performance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent implements aspherical surfaces on specific lens elements to improve optical performance by reducing spherical aberration and enabling more compact lens designs. The aspherical profiles are applied strategically to the first, fourth, and seventh lenses where they provide the greatest benefit for controlling ray paths and reducing overall system length, while accepting increased manufacturing complexity only at these critical positions rather than all lenses.
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 system achieves high resolution and compactness, addressing the need for miniaturized cameras in portable terminals by optimizing lens configurations and materials to enhance imaging quality.
Implementation Method 1
An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, and an eleventh lens arranged in order from an object side, wherein the first lens has positive refractive power, and the second lens has positive refractive power
Data Source
AI summary
An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, and an eleventh lens arranged in order from an object side, wherein the first lens has positive refractive power, and the second lens has positive refractive power, wherein the eleventh lens has at least one inflection point on at least one of an object-side surface and an image-side surface, and wherein 0.6<TTL/(2×IMG HT)<0.8, and Nv26≥4 are satisfied, where TTL is a distance from an object-side surface of the first lens to an imaging surface on an optical axis, IMG HT is half a diagonal length of the imaging surface, and Nv26 is the number of lenses with an Abbe number of less than 26.