Eight-Element Camera Lens for 90-Degree, Low-Distortion Imaging
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Solution Overview
Problem
Information handling system cameras face challenges in capturing high-quality visual images with a wide field of view and low distortion, particularly in low light conditions, due to limited space and the use of fisheye lenses that distort images and struggle in low light environments.
Innovation Solution
A camera lens with eight elements, comprising glass and plastic materials, is designed to capture images with an F-number of 1.8 and less than 3% distortion, featuring a 90-degree field of view, using glass elements for the first and last lenses and aspherical plastic elements for the middle six lenses to minimize distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fisheye lens is used to achieve a wide field of view in limited space, then the field of view is sufficient, but image distortion increases and low light performance deteriorates
Solution Approach 1:
The lens is divided into eight separate lens elements (first through eighth lens elements) arranged in sequence. This segmentation allows each element to be optimized for specific optical functions, correcting distortion while maintaining wide field of view. The multiple elements work together to achieve both wide adaptability and high image quality.
Solution Approach 2:
The lens employs a composite design combining different lens element types with varying refractive powers and material properties. The first and eighth elements have positive refractive power while intermediate elements have negative refractive power, creating a composite optical system that corrects fisheye distortion while preserving wide angle capability.
2Adaptability or versatility
If a fisheye lens is used to achieve a wide field of view in limited space, then the field of view is sufficient, but low light performance deteriorates
Solution Approach 1:
The eight-element lens structure allows optimization of each element's contribution to light gathering. The combination of positive and negative refractive power elements creates an optical path that maximizes light transmission efficiency, improving low light performance while maintaining wide field of view.
Solution Approach 2:
The lens design changes key optical parameters including refractive powers of individual elements, spacing between elements, and overall focal length to achieve Fno of 2.0 or less. This parameter optimization enables both wide field of view and improved low light performance simultaneously.
3Illumination intensity
If the aperture is increased to improve low light performance, then low light performance improves, but distortion increases
Solution Approach 1:
The composite lens system with eight elements of varying refractive powers creates an optimized optical path that maintains low distortion even at large aperture settings. The alternating positive and negative power elements compensate for each other's aberrations, achieving Fno of 2.0 or less with distortion of 10% or less.
4Illumination intensity
If a larger aperture is used to improve low light performance, then low light performance improves, but the lens depth increases
Solution Approach 1:
The lens design optimizes parameters including element spacing, refractive indices, and curvatures to achieve compact form factor. The eight elements are arranged with optimized distances between them, allowing Fno of 2.0 or less while maintaining lens depth suitable for display bezel integration.
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 lens achieves high-quality image capture in low light with minimal distortion, providing an F-number of 1.8 and less than 3% distortion, suitable for information handling systems with a 90-degree field of view.
Implementation Method 1
A lens included in the camera has eight lens elements to capture quality visual images with reduced distortion in low light environments
Data Source
AI summary
An information handling system camera provides a ninety degree field of view with low distortion in low light environments by a capturing visual images through a lens having eight lens elements. The first lens element closest to the object and eighth lens element closest to the image each have a glass material, positive refractive power and spherical surface. The middle six lens elements each have a plastic material and aspherical surfaces that direct light to an image sensor through a variety of positive and negative refractive powers.