Image Pickup Lens Abutting Portion Frame Alignment
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Solution Overview
Problem
The camera module disclosed in Patent Literature 1 faces a risk of deterioration in optical characteristics due to unintended tilting of the upper lens group with respect to the liquid lens.
Innovation Solution
An image pickup lens configuration that includes a first lens with a frame around its perimeter and a second lens positioned closer to the object, featuring a lens surface with an abutting portion on its rim that abuts the frame, thereby maintaining the second lens's position relative to the first lens and reducing the risk of optical characteristic deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the upper lens group abuts on the liquid lens, then the lens group can be positioned, but unintended tilting occurs causing deterioration in optical characteristic
Solution Approach 1:
The lens group is divided into a first lens group and a second lens group, with the first lens group positioned closer to the object. This segmentation allows independent positioning control of each group, enabling the second lens group to be stably positioned on the liquid lens while the first lens group maintains optical alignment, thus preventing tilting-induced optical deterioration.
Solution Approach 2:
A support structure acts as an intermediary between the lens groups and the liquid lens. This support structure provides stable positioning for the second lens group on the liquid lens while maintaining the correct spatial relationship and optical alignment between lens groups, preventing unintended tilting that would deteriorate optical characteristics.
2Volume of moving object
If the lens group is positioned close to the liquid lens, then compactness is improved, but positioning precision deteriorates due to tilting
Solution Approach 1:
Dividing the lens group into two separate groups allows compact positioning near the liquid lens while maintaining precise optical alignment. The first lens group can be positioned close to achieve compactness, while the second lens group provides stable positioning support, preventing tilting and maintaining positioning precision despite the compact configuration.
Solution Approach 2:
The positioning function is distributed across different spatial dimensions: the first lens group operates in the optical path dimension close to the liquid lens for compactness, while the second lens group provides positioning stability in the mechanical support dimension. This dimensional separation allows compactness without sacrificing positioning precision.
Data Source
AI summary
The risk of deterioration in optical characteristic is reduced. An image pickup lens includes a second lens that has an abutting portion which is located on a rim of a lens surface and which abuts on a frame.