Planar-Aspherical Lens Assembly for Thin Mobile Devices
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Solution Overview
Problem
The challenge in mobile device markets is to reduce the thickness of electronic devices with integrated optical lens assemblies while maintaining high performance, which is difficult due to the conflict between increasing the number of lenses and sensor sizes, and the complexity of manufacturing smaller lenses with proper optical and aberration characteristics.
Innovation Solution
The optical lens assembly design includes at least two lenses with planar central regions and aspherical peripheral regions, arranged from object to image side, where the ratio of the planar central region diameter to the effective lens diameter satisfies 0.01 < φflat-object / φfull < 0.5, allowing for compact size and high resolution performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lenses and sensor sizes are increased to improve optical performance, then image quality and resolution are improved, but device thickness increases
Solution Approach 1:
The patent applies local quality by dividing each lens into a planar central region and a curved peripheral region. The planar central region (with diameter ratio 0.05 < φflat-object/φfull < 0.4) provides optimized optical performance for the main light path, while the curved peripheral region handles edge rays, allowing high-quality imaging with fewer lenses and reduced overall device thickness.
Solution Approach 2:
The patent segments each lens surface into distinct functional zones: a planar central region and a curved peripheral region. This segmentation allows each zone to be optimized for its specific function, enabling the system to achieve high-resolution imaging with a compact number of lenses, thereby reducing device thickness while maintaining image quality.
2Length of stationary object
If lens size is reduced to achieve compact device, then device thickness is reduced, but manufacturing difficulty increases
Solution Approach 1:
The patent applies local quality by dividing each lens into a planar central region and a curved peripheral region. The planar central region (with diameter ratio 0.05 < φflat-object/φfull < 0.4) provides optimized optical performance for the main light path, while the curved peripheral region handles edge rays, allowing high-quality imaging with fewer lenses and reduced overall device thickness.
Solution Approach 2:
The patent segments each lens surface into distinct functional zones: a planar central region and a curved peripheral region. This segmentation allows each zone to be optimized for its specific function, enabling the system to achieve high-resolution imaging with a compact number of lenses, thereby reducing device thickness while maintaining image quality.
3Reliability
If the number of lenses is increased to achieve proper optical characteristics, then aberration correction is improved, but device complexity and thickness increase
Solution Approach 1:
The patent applies local quality by dividing each lens into a planar central region and a curved peripheral region. The planar central region (with diameter ratio 0.05 < φflat-object/φfull < 0.4) provides optimized optical performance for the main light path, while the curved peripheral region handles edge rays, allowing high-quality imaging with fewer lenses and reduced overall device thickness.
Solution Approach 2:
The patent segments each lens surface into distinct functional zones: a planar central region and a curved peripheral region. This segmentation allows each zone to be optimized for its specific function, enabling the system to achieve high-resolution imaging with a compact number of lenses, thereby reducing device thickness while maintaining image quality.
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 enables the creation of compact optical lens assemblies with improved manufacturing ease and reduced aberration, effectively addressing the challenge of thinning electronic devices while maintaining high image quality.
Implementation Method 1
at least one of the at least two lenses includes an object side surface having a planar central region, an image side surface having a planar central region and a peripheral region having an aspherical surface
Data Source
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AI summary
An optical lens assembly utilized as part of an electronic device may be configured to provide a compact structure and/or a thin profile for the electronic device while maintaining high resolution, via the use of at least one lens having planar surfaces in partial portions thereof. An optical lens assembly may include at least two lenses arranged from an object side to an image side, where at least one of the at least two lenses includes an object side surface with a planar central region, an image side surface that also has a planar central region and a peripheral region having an aspherical surface. Various embodiments with differing lens arrangements are disclosed.