Multi-Lens Optical System for Wide-Angle Telephoto Resolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mobile communications terminals face challenges in miniaturizing and lightening while maintaining high-resolution and high-performance camera modules, limiting the realization of camera lenses with high resolution and performance.
Innovation Solution
The optical system includes a sequence of first to sixth lenses with specific refractive powers and aspherical surfaces, along with a stop and image sensor, optimized to improve aberration correction and achieve a wide angle and telephoto function with different fields of view, using plastic lenses to satisfy various conditional expressions for focal length, field of view, and Abbe numbers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If camera modules are miniaturized and lightened to reduce device size and weight, then mobile terminal compactness is improved, but resolution and optical performance deteriorate
Solution Approach 1:
The camera module is divided into multiple lens elements (first through sixth lenses) with different functions. Each lens has specific refractive power and Abbe number characteristics that address different optical requirements, allowing the system to achieve high resolution while maintaining compact size through functional segmentation of the optical path.
Solution Approach 2:
Different lens elements are assigned specific material properties (Abbe numbers ranging from 20 to 60) and surface characteristics (convex/concave/aspherical) optimized for their local position in the optical system. This local optimization of optical quality enables high-resolution imaging while keeping the overall module compact.
2Manufacturing precision
If multiple lenses are added to improve resolution, then optical performance is improved, but device complexity increases
Solution Approach 1:
Multiple lens elements are merged into a single integrated camera module with unified optical design. The first through sixth lenses are arranged in sequence within one module, combining their individual optical functions to achieve high resolution without requiring separate modules for each lens element.
Solution Approach 2:
The camera module is designed with multi-functionality, achieving both wide-angle and telephoto functions through the same set of six lenses by utilizing different focal length combinations and field of view ranges (15° to 35°), eliminating the need for separate optical modules for different functions.
3Weight of moving object
If plastic lenses are used instead of glass to reduce weight, then camera module weight is reduced, but manufacturing precision and optical quality worsen
Solution Approach 1:
The design specifies precise parameter ranges for plastic lens materials, including Abbe numbers between 20 and 60, and specific conditional expressions for focal lengths and field of view. These controlled parameter changes enable plastic lenses to achieve optical quality comparable to glass while maintaining the weight advantages of plastic materials.
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
This configuration enhances optical performance by improving aberration correction, achieving high resolution, and enabling both wide angle and telephoto functions in a compact mobile device with varying fields of view, while maintaining a lightweight design.
Implementation Method 1
first to sixth lenses disposed sequentially from an object
Implementation Method 2
an image sensor configured to convert an image of a subject incident through the first to sixth lenses into an electrical signal
Data Source
AI summary
An optical device and mobile device including a plurality of optical devices having different fields of view to increase an aberration improvement effect and to realize a higher degree of resolution are disclosed. The optical device includes first to sixth lenses disposed sequentially from an object, and an image sensor configured to convert an image of a subject incident through the first to sixth lenses into an electrical signal, wherein 0.7<TTL/f<1.0. The mobile device includes a plurality of optical systems having different fields of view, wherein a difference between fields of the two optical devices of the plurality of optical devices is 20 degrees or more, and one optical device of the plurality of optical devices comprise, whereby a wide angle function and a telephoto function may be realized.