Three-Lens Optical System Aberration Correction
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Solution Overview
Problem
Conventional optical systems in portable electronic devices face challenges in achieving high imaging quality due to aberrations and distortion, especially when required to have a large aperture or wide view angle, which complicates manufacturing and affects peripheral imaging quality.
Innovation Solution
The optical image capturing system employs a combination of refractive powers and aspheric surfaces in three-piece lenses to increase light intake, widen the view angle, and improve pixel density, using specific lens parameters such as inflection points and profile curve lengths to correct aberrations and optimize imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the aperture is increased to take pictures in dark environment or provide wide view angle, then the light intake is improved, but aberrations are generated causing poor imaging quality at peripheral portions
Solution Approach 1:
The optical system is divided into three separate lens groups (first lens group with positive refractive power, second lens group with negative refractive power, and third lens group with positive refractive power). This segmentation allows each lens group to contribute differently to light gathering and aberration correction, enabling large aperture while maintaining peripheral imaging quality through coordinated design of multiple lens elements with specific refractive powers and aspheric surfaces.
2Adaptability or versatility
If the view angle is widened to satisfy selfie requirements, then the field of view is improved, but distortion is increased
Solution Approach 1:
Aspheric surfaces are employed in the lens groups, particularly in the second lens group with negative refractive power, to correct distortion. The asymmetric aspheric profiles allow the lens to maintain a wide view angle while compensating for the natural distortion that occurs at wide angles, enabling selfie functionality with reduced pincushion or barrel distortion.
3Manufacturing precision
If more lenses are added to improve imaging quality, then the optical performance is improved, but the device complexity and size increase
Solution Approach 1:
Each lens group is designed to perform multiple functions: the first lens group with positive refractive power contributes to light gathering and initial focusing, the second lens group with negative refractive power corrects aberrations and controls distortion, and the third lens group with positive refractive power provides final focusing and additional aberration correction. This multi-functional design achieves high imaging quality with only three lens groups, avoiding the need for more complex multi-element lenses.
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 imaging quality by reducing aberrations and distortion, allowing for higher pixel density and improved light management, suitable for compact electronic devices while maintaining a miniature form factor.
Implementation Method 1
An optical image capturing system is provided including a first lens, a second lens, a third lens, and an image plane, in order, along an optical axis from an object side to an image side
Data Source
AI summary
The invention discloses a three-piece optical lens for capturing image and a five-piece optical module for capturing image. In order from an object side to an image side, the optical lens along the optical axis comprises a first lens with positive refractive power; a second lens with refractive power; and a third lens with refractive power; and at least one of the image-side surface and object-side surface of each of the three lens elements are aspheric. The optical lens can increase aperture value and improve the imaging quality for use in compact cameras.