Asymmetric Lens Design for Camera Module Flare Reduction
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Solution Overview
Problem
Conventional camera modules face challenges in achieving high-resolution images due to issues with optical aberrations and unnecessary light condensation on the image sensor, particularly when using multiple lenses, which complicates the design and increases the size of the optical system.
Innovation Solution
The optical system incorporates lenses with non-circular and inclined side surfaces, where the lengths of the object-side and sensor-side surfaces differ, and the side surfaces are inclined relative to the optical axis, effectively redirecting unnecessary light and reducing aberrations, thereby minimizing flare on the image sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple lenses are used to achieve high image quality and resolution, then optical performance is improved, but the optical system size increases and design complexity increases
Solution Approach 1:
The patent applies asymmetry by configuring lenses with non-circular cross-sections where the diameter in the first direction (horizontal) differs from the diameter in the second direction (vertical). This asymmetric lens design allows optimization of optical paths for different directions, achieving high image quality while reducing overall optical system size compared to conventional circular lenses.
Solution Approach 2:
The patent implements local quality by giving different regions of the lens different properties - specifically, the lens has different diameters in different directions (first direction vs second direction), allowing each region to be optimized for its specific optical function while contributing to the overall compact design.
2Manufacturing precision
If multiple lenses are used to achieve high resolution, then image quality is improved, but design complexity increases
Solution Approach 1:
The asymmetric lens configuration with different diameters in first and second directions provides a systematic approach to controlling optical aberrations. This geometric asymmetry simplifies the design process by providing a clear structural parameter to optimize resolution while managing complexity.
Solution Approach 2:
By optimizing specific regions of the lens (different diameters in different directions), the patent achieves high resolution through localized optimization rather than requiring complex adjustments across the entire optical system, thereby reducing design complexity.
3Ease of manufacture
If conventional circular lenses are used, then manufacturing is simpler, but unnecessary light condenses on the image sensor causing flare
Solution Approach 1:
The patent eliminates flare by using asymmetric lenses with different diameters in the first and second directions. This asymmetric geometry prevents unnecessary light from condensing on the image sensor, solving the flare problem while the manufacturing process remains feasible through precision molding techniques.
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 design enhances the camera module's ability to produce high-resolution images by reducing unnecessary light and optical aberrations, leading to a more compact and efficient optical system with improved image quality.
Implementation Method 1
the side surfaces are inclined relative to the optical axis, effectively redirecting unnecessary light
Data Source
AI summary
The optical system disclosed in the embodiment of the invention includes a plurality of lenses arranged in the direction from the object side to the sensor side, wherein at least one first lens of the plurality of lenses includes a first surface that is an object-side surface and a second surface that is a sensor-side surface, a length in a first direction of the first surface is different from a length in the first direction of the second surface, the length in the first direction of the first surface is shorter than a length in a second direction of the first surface, the first direction is orthogonal to an optical axis of the lenses, and the second direction is perpendicular to the first direction and the optical axis.