Two-Lens Optical System Aberration Correction
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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, leading to suboptimal imaging quality.
Innovation Solution
The optical image capturing system employs a combination of refractive powers and convex/concave surfaces in two optical lenses to increase light intake and improve imaging quality, utilizing specific lens element parameters such as focal lengths, refractive indices, and aspheric surfaces to correct aberrations and adjust the optical path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional optical image capturing system designs are used, then device compactness is maintained, but light intake is insufficient leading to poor imaging quality
Solution Approach 1:
The patent employs aspheric surfaces on multiple lens elements (first, second, third, and fourth lens elements) to correct optical aberrations and improve light intake. The aspheric surfaces enable better control of light rays across different field angles, enhancing imaging quality while maintaining compact form factor suitable for portable devices
Solution Approach 2:
The patent optimizes specific parameter ranges including focal length ratios (0.3<f2/f1<1.5, 0.5<f3/f2<2.0), curvature radii ratios (0.5<R2/R1<2.0), and refractive index combinations to achieve improved light intake and imaging quality. These parameter optimizations enable the system to capture more light while maintaining compact dimensions
2Manufacturing precision
If more lens elements are added to improve imaging quality, then light intake and image formation improve, but device size increases
Solution Approach 1:
The patent arranges four lens elements in a compact sequential configuration where each element is positioned close to the others, minimizing the overall optical path length. The lens elements are nested within a compact housing that reduces the distance from the object-side surface of the first lens element to the image plane, achieving high imaging quality without increasing device length
Solution Approach 2:
The use of aspheric surfaces on all four lens elements enables more efficient light path control, allowing the optical system to achieve high imaging quality with a reduced number of elements and shorter optical path compared to traditional spherical lens designs
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 increasing light intake and correcting optical distortions, enabling the capture of high-resolution images with improved low-light performance and miniaturization of the optical system, suitable for applications in portable electronic devices.
Implementation Method 1
The first lens element has positive refractive power
Implementation Method 2
The second lens element has negative refractive power
Data Source
AI summary
A two-piece optical lens for capturing image and a two-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 positive refractive power; and a second lens with refractive power; and at least one of the image-side surface and object-side surface of each of the two lens elements are aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.