Eleven-Lens Optical Layout for Slim High-Resolution Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a demand for miniaturized optical imaging systems in portable terminals that achieve high resolution while maintaining a slim form factor, and existing systems struggle to meet these requirements.
Innovation Solution
An optical imaging system comprising eleven lenses, each with specific refractive powers, Abbe numbers, and surface shapes, arranged to satisfy conditions such as TTL/(2×IMG HT) < 0.660 and Fno < 1.70, ensuring high resolution and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lenses is increased to achieve high resolution, then image quality is improved, but system size and complexity increase
Solution Approach 1:
The patent applies parameter changes by carefully selecting specific optical parameters for each lens element, including refractive indices (e.g., 1.56 < ν < 1.70 for certain lenses), Abbe numbers (e.g., 20 < ν < 40 for specific elements), and focal length ratios (e.g., f2/f1 between -0.60 and -0.30). These parameter optimizations enable high-resolution imaging with an 11-element design while controlling overall system size through precise optical property selection rather than simply reducing element count.
Solution Approach 2:
The patent employs composite material principles by combining multiple lens materials with different optical properties in a specific sequence. Each lens element uses materials with carefully matched refractive indices and Abbe numbers to achieve chromatic aberration correction and high resolution. The composite arrangement of 11 different lens elements, each with specific material properties, creates an optimized optical system that achieves high resolution without excessive size increase.
2Length of stationary object
If the focal length is reduced to make the system slimmer, then portability is improved, but field of view and resolution may deteriorate
Solution Approach 1:
The patent applies segmentation by dividing the optical system into 11 distinct lens elements with specific functions. The first lens element has positive refractive power with convex object-side surface, followed by alternating positive and negative power elements. This segmentation allows each element to contribute specifically to resolution while the cumulative effect achieves the desired field of view and resolution without excessive thickness, as evidenced by the TTL/(2×IMG HT) ratio constraint of less than 0.660.
Solution Approach 2:
The patent addresses the thickness-resolution tradeoff by optimizing parameters in other dimensions, specifically the radial and axial positioning of each lens element. The conditional expressions constrain the spatial arrangement (e.g., distance ratios like D15/L1S1E between 0.20 and 0.40, and D67/L1S1E between 0.10 and 0.30) to achieve high resolution and field of view while maintaining a slim profile through dimensional optimization rather than simply increasing thickness.
3Use of energy by moving object
If the aperture is enlarged to improve light gathering, then low-light performance is improved, but depth of field decreases and aberrations increase
Solution Approach 1:
The patent introduces intermediary lens elements between the aperture stop and image plane to correct aberrations introduced by larger aperture settings. Specifically, the third through eleventh lens elements act as intermediaries that correct spherical aberration, coma, and other off-axis aberrations. The conditional expressions for these elements (e.g., focal length ratios, Abbe numbers) ensure that they effectively manage aberrations while maintaining the benefits of larger aperture for light gathering, thus preserving optical performance consistency across different aperture settings.
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 a high resolution and compact form factor, with a field of view greater than 80°, while maintaining optical performance and minimizing system size.
Implementation Method 1
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 sequentially arranged in ascending numerical order along an optical axis
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 sequentially arranged in order along an optical axis from an object side of the optical imaging system toward an imaging surface of the optical imaging system, wherein the first lens has a positive refractive power, the second lens has a negative refractive power, at least two lenses sequentially arranged along the optical axis among the first lens to the fourth lens have an Abbe number of less than 38, and TTL/(2×IMG HT)<0.660 is satisfied, where TTL is a distance along the optical axis from an object-side surface of the first lens to the imaging surface, and IMG HT is one half of a diagonal length of the imaging surface.