Stepped Lens Barrel Layout for Compact Multi-Lens Cameras
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Solution Overview
Problem
Existing camera devices face challenges in achieving compact size while maintaining high optical performance and reliability due to the difficulty in arranging multiple lenses, which leads to increased area occupation and reduced effective usage on displays or touch panels.
Innovation Solution
The camera device incorporates a lens barrel design with a head part having a smaller upper portion and an extension part, featuring inclined inner side surfaces and a stepped shape, allowing for a compact form factor and improved optical alignment of lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple lenses are arranged to achieve high resolution, then optical performance is improved, but device complexity and space occupation increase
Solution Approach 1:
The lens barrel is divided into distinct functional sections: a head part for accommodating the first lens and an extension part for accommodating subsequent lenses. This segmentation allows optimized spacing and alignment of multiple lenses while maintaining a compact overall structure, resolving the contradiction between achieving high resolution with multiple lenses and managing the complexity of their arrangement.
Solution Approach 2:
The lens barrel transitions from a uniform cylindrical structure to a stepped configuration with varying radial dimensions along the optical axis. The head part has a larger radial dimension to accommodate the first lens, while the extension part has a smaller radial dimension. This dimensional variation allows compact packaging of multiple lenses by utilizing space efficiently in three-dimensional space rather than simply extending the barrel length.
2Measurement precision
If multiple lenses are arranged to achieve high resolution, then optical performance is improved, but the area occupied on display increases
Solution Approach 1:
The lens barrel structure nests the extension part within the head part's radial envelope. The extension part is positioned concentrically within the head part, allowing the subsequent lenses to be accommodated within the space defined by the first lens housing. This nested arrangement minimizes the overall footprint area that would be occupied on the display surface.
Solution Approach 2:
By transitioning from a uniform radial profile to a stepped configuration where the extension part has a smaller radial dimension than the head part, the design utilizes vertical and axial dimensions more efficiently. This allows the camera device to maintain compact area occupation on the display while still accommodating multiple lenses for high optical performance.
3Volume of moving object
If the lens barrel is miniaturized, then compact size is achieved, but reliability may be compromised
Solution Approach 1:
The lens barrel is segmented into a head part and an extension part, allowing for optimized structural design in each section. The head part can be designed with larger radial dimensions to provide structural support and accommodation for the first lens, while the extension part minimizes additional size. This segmentation enables compact overall size while maintaining structural integrity and reliability through appropriate dimensional distribution.
Solution Approach 2:
Different radial dimensions are assigned to different parts of the lens barrel based on local requirements. The head part has a larger radial dimension to accommodate the first lens and provide structural stability, while the extension part has a smaller radial dimension to minimize overall size. This local quality variation allows the lens barrel to achieve compact miniaturization without compromising reliability, as each section is dimensioned appropriately for its specific function.
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
The design achieves high-definition and high-resolution imaging with minimized exposure area and improved reliability by correcting aberrations and reducing the size of the lens barrel's head part, thus optimizing space utilization.
Implementation Method 1
an imaging lens for forming an image
Implementation Method 2
an image sensor for converting the formed image into an electrical signal
Data Source
AI summary
The camera device disclosed to an embodiment includes a plurality of lenses which are arranged sequentially along an optical axis from an object side to an image side, and a lens barrel in which the plurality of lenses is received and which has an incident hole formed on an image surface thereof, wherein the lens barrel includes the plurality of lenses. A head part disposed in a region corresponding to a lens closest to an object side of the lens, and an upper portion of the head part may have a smaller length than that of a lower portion of the head part in a vertical direction of the optical axis.