Four-Lens Optical System for High Aperture and Night Viewing
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Solution Overview
Problem
Traditional optical image capturing systems in portable electronic devices fail to meet the requirements for higher pixel counts and larger apertures, particularly for micro filming and night viewing, due to insufficient light intake and imaging quality.
Innovation Solution
The system employs a combination of four optical lenses with refractive powers and convex/concave surfaces, along with a mechanism for positioning lens elements with small wall thickness, to increase light intake and improve imaging quality, suitable for compact electronic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional two-lens or three-lens design is used, then device complexity is reduced, but light intake and imaging quality are insufficient
Solution Approach 1:
The optical system is divided into four separate lens elements (first, second, third, and fourth lens elements) with different refractive powers and surface curvatures. Each lens element is independently designed and positioned by separate positioning elements, allowing optimized light gathering while maintaining modular complexity management.
2Illumination intensity
If aperture size is increased for better light intake, then imaging quality improves, but device size increases
Solution Approach 1:
The patent utilizes the optical axis dimension efficiently by positioning lens elements at different distances from the image plane (first lens element farthest, fourth lens element closest). This axial arrangement allows the system to achieve a large effective aperture without increasing the lateral footprint of the device, enabling micro filming and night viewing capabilities in compact form factors.
3Measurement precision
If pixel size is minimized for high pixel count, then imaging resolution improves, but light intake per pixel decreases
Solution Approach 1:
The patent employs lens elements with specifically designed refractive powers and surface curvatures (convex and concave surfaces with different radii of curvature) to optimize the optical path and increase light intensity reaching each pixel. The fourth lens element positioned closest to the image plane has parameters optimized to concentrate light onto the minimized pixel elements, enabling high pixel count sensors to maintain adequate illumination for night viewing.
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 the quantity of incoming light and improves imaging quality, enabling higher pixel counts and better performance in low-light conditions, suitable for miniaturized electronic devices.
Implementation Method 1
a first, second, third and fourth lens elements with 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.