Five-Lens Assembly Layout for Compact High-Pixel Imaging
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Solution Overview
Problem
Existing optical devices face challenges in miniaturizing the lens assembly while maintaining high pixel performance and correcting chromatic aberration, leading to increased size of electronic devices due to the need for multiple lenses and larger image sensors.
Innovation Solution
A lens assembly comprising five lenses with specific refractive powers and shapes, including meniscus lenses made of synthetic resin, arranged to minimize overall length and correct aberrations, along with an aperture stop to control light and an image sensor with high pixel count, all within a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple lenses are combined to achieve low F-number and low aberration, then image quality is improved, but device size increases
Solution Approach 1:
The lens assembly is divided into five distinct lenses with specific refractive powers (positive, negative, positive, negative, positive) arranged in sequence. Each lens segment contributes to correcting specific aberrations while maintaining a compact overall structure, resolving the contradiction between image quality and device size.
Solution Approach 2:
The patent applies specific parameter relationships between lens Abbe numbers (vd2, vd3, vd4) and field of view (FoV) to optimize the optical system. By controlling the Abbe numbers of individual lenses within specific ranges, the system achieves low aberration with a compact design, balancing image quality and device size.
2Manufacturing precision
If image sensor pixel count is increased to obtain high-resolution images, then image quality is improved, but mounting space requirement increases
Solution Approach 1:
The patent arranges lenses along the optical axis in a sequential manner, utilizing the depth dimension to achieve high pixel performance without increasing the lateral mounting area. The five-lens configuration compresses the optical path in the axial direction while maintaining a compact footprint, enabling high-resolution imaging in limited space.
3Volume of moving object
If lens assembly size is reduced for miniaturization, then device portability is improved, but aberration correction becomes difficult
Solution Approach 1:
The lens assembly combines lenses with different refractive indices and Abbe numbers in a specific sequence. By using composite optical characteristics (positive and negative refractive power lenses alternating), the system achieves effective aberration correction within a miniaturized structure, resolving the contradiction between size reduction and optical performance.
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 solution enables a compact optical system that supports high-pixel sensors, minimizing the size of electronic devices and effectively correcting aberrations, thereby enhancing image quality and device portability.
Implementation Method 1
a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power; and a fifth lens having a positive refractive power
Data Source
AI summary
An electronic device may include: a lens assembly including: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power; and a fifth lens having a positive refractive power; and an image sensor including an imaging plane on which an image is configured to be formed, wherein the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are sequentially aligned along an optical axis direction of an optical axis of the lens assembly from an object side of the lens assembly toward an image side of the lens assembly, the image side being towards the image sensor. A lens assembly and an electronic device including same, according to various embodiments, may also be provided.