Six-Lens Optical System for Wide-Angle Imaging Aberration Correction
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Solution Overview
Problem
Traditional optical image capturing systems for portable electronic devices fail to meet the requirements of high pixel quality and wide angle views, particularly for self-shooting functions, due to limitations in lens design and aberration correction.
Innovation Solution
The optical image capturing system employs a six-piece optical lens configuration with specific refractive powers, aspheric surfaces, and inflection points to increase the view angle and improve imaging quality, utilizing a combination of convex and concave surfaces to adjust the optical path and correct distortions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional four-lens or five-lens design is used, then the system structure is simpler, but the view angle and imaging quality for high pixels cannot be met
Solution Approach 1:
The optical system is divided into six separate lens elements with specific refractive powers arranged in sequence. Each lens element contributes to correcting specific aberrations and achieving the desired imaging quality, with the first lens having positive refractive power, the second lens having negative refractive power, and so on through the sixth lens
Solution Approach 2:
Different surfaces of the lens elements are designed with specific geometric shapes (convex or concave) to address local optical quality issues. The object-side and image-side surfaces of each lens element are configured with particular curvatures to correct aberrations in specific regions of the optical field
2Length of moving object
If traditional lens design is used, then the system size can be controlled, but the view angle is insufficient for wide angle and self-shooting functions
Solution Approach 1:
The focal lengths of individual lens elements are specifically designed within certain ranges (e.g., the focal length of the first lens element is between 0.5f and 2.0f where f is the focal length of the optical system). The ratio of focal lengths between adjacent lenses is controlled to achieve both compact size and wide view angle
3Measurement precision
If more lens elements are added to improve imaging quality, then the image quality and view angle improve, but the system complexity and size increase
Solution Approach 1:
The aperture stop is extracted and positioned between the second and third lens elements to effectively control the optical path and reduce aberrations. This allows the lens elements to be optimized for imaging quality without requiring additional elements, maintaining a balance between quality and complexity
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 view angle and image quality while minimizing the system's size, allowing for effective aberration correction and improved performance in off-axis view fields, suitable for use in compact portable electronic devices.
Implementation Method 1
an optical image capturing system, in order from an object side to an image side, includes a first lens element with positive refractive power, a second lens element with negative refractive power, a third lens element with positive refractive power, a fourth lens element with negative refractive power, a fifth lens element with positive refractive power, and a sixth lens element with negative refractive power
Data Source
AI summary
An optical image capturing system, from an object side to an image side, comprises a first, second, third, fourth, fifth, and sixth lens elements. The first lens element with refractive power has a convex object-side surface. The second through fifth lens elements have refractive power and both of an object-side surface and an image-side surface of the four lens elements are aspheric. The sixth lens with negative refractive power has a concave object-side surface. Both of the image-side and object-side surfaces of the six lens elements are aspheric and at least one of the two surfaces has inflection points. Each of the six lens elements may have refractive power. When specific conditions are satisfied, the optical image capturing system can have a better optical path adjusting ability to acquire better imaging quality.