Four-Lens Optical System for Compact Camera Aperture and Imaging Quality
Solution Overview
Problem
Traditional optical image capturing systems in portable electronic devices fail to meet the requirements for higher pixel density and larger apertures, particularly for micro filming and night viewing, due to limitations in increasing incoming light and improving imaging quality.
Innovation Solution
The optical image capturing system employs a combination of four optical lenses with refractive powers, convex and concave surfaces, and a mechanism with small wall thickness to enhance light intake and improve imaging quality, utilizing a positioning element with specific geometries and parameters to align and correct lens elements, thereby optimizing the optical path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional two-lens or three-lens design is used, then device complexity is reduced, but imaging quality and light intake are insufficient for high-pixel requirements
Solution Approach 1:
The optical system is divided into four distinct lens elements, each with specific refractive powers and surface curvatures. This segmentation allows each lens to be optimized for specific optical functions, improving overall imaging quality and light intake while maintaining manageable complexity through modular design
Solution Approach 2:
The patent employs a compact nested arrangement where multiple lens elements are positioned in sequence within a minimized optical path. The lens elements are arranged to nest efficiently within the device constraints, achieving high imaging quality in a compact form factor suitable for portable electronic devices
2Illumination intensity
If aperture size is increased to improve light intake, then imaging quality for night view improves, but device size increases
Solution Approach 1:
The patent optimizes the refractive powers, surface curvatures, and material properties of the four lens elements to maximize light intake efficiency. By changing these optical parameters, the system achieves high illumination intensity and improved night view capability without requiring a proportionally larger aperture or device size
Solution Approach 2:
The optical system uses lens elements with different refractive indices and Abbe numbers, effectively utilizing composite optical materials with varying properties. This allows the system to optimize light transmission and focusing efficiency, achieving high light intake in a compact configuration
3Measurement precision
If pixel density is increased, then imaging resolution improves, but light intake per pixel decreases
Solution Approach 1:
The patent designs each lens element with specific local optical properties, including varying refractive powers and surface curvatures optimized for different regions of the optical path. This local optimization ensures that light is efficiently directed to each pixel region, maintaining high illumination intensity even as pixel density increases
Solution Approach 2:
The lens elements employ aspheric surfaces with optimized curvatures to correct optical aberrations and improve light distribution across the image sensor. The curved surfaces are designed to focus light more effectively onto high-density pixel arrays, maintaining resolution and light intake 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
This configuration results in improved imaging quality and increased light intake, enabling the system to meet the demands of high-pixel density and advanced camera functionalities in minimized electronic devices.
Implementation Method 1
The first lens element has positive refractive power... The second lens element has negative refractive power... The third lens element has positive refractive power... The fourth lens element has negative refractive power
Data Source
AI summary
A four-piece optical lens for capturing image and a four-piece optical module for capturing image are provided. In order from an object side to an image side, the optical lens along the optical axis includes a first lens with refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with positive refractive power; and at least one of the image-side surface and object-side surface of each of the four lens elements are aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.