Imaging Lens with Perpendicular Lens Alignment
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Solution Overview
Problem
Small-size image pickup apparatuses face challenges in achieving high resolution due to manufacturing errors and limited space for lens alignment, which increases manufacturing costs and reduces productivity.
Innovation Solution
The design includes a positive first lens that is movable perpendicular to the optical axis, allowing for precise alignment after all lens parts are built in, and a rear lens group with a negative lens to adjust the Petzval Sum, ensuring high resolution and minimizing the overall lens size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a lens with improved aberration is employed to achieve high definition, then image quality is improved, but manufacturing cost increases due to the need for reduced optical axis shift
Solution Approach 1:
The patent applies preliminary action by providing predetermined mark positions on the lens holder before lens assembly, enabling alignment marks to be pre-positioned. This allows optical axis alignment to be performed efficiently after assembly without requiring complex real-time adjustment mechanisms, thereby reducing manufacturing cost while maintaining high precision.
Solution Approach 2:
The patent introduces alignment marks as intermediary elements that facilitate optical axis alignment. These marks serve as mediators between the lens holder and the lens, enabling precise alignment through visual or mechanical reference without requiring complex alignment mechanisms, thus reducing manufacturing cost while achieving high precision.
2Manufacturing precision
If a whole alignment mechanism is incorporated in the lens to reduce optical axis shift, then alignment precision is improved, but device size increases and productivity decreases
Solution Approach 1:
The patent extracts the alignment function from a complex mechanical alignment mechanism and implements it through simple predetermined mark positions on the lens holder. This eliminates the need for bulky alignment mechanisms while maintaining alignment precision, thereby reducing device complexity and size.
Solution Approach 2:
The lens holder provides self-alignment functionality through predetermined mark positions that guide lens placement. The system serves its own alignment needs through these built-in marks without requiring external alignment mechanisms, reducing device complexity while maintaining precision.
3Manufacturing precision
If a whole alignment mechanism is incorporated in the lens to reduce optical axis shift, then alignment precision is improved, but productivity decreases due to inefficient alignment process
Solution Approach 1:
The patent applies preliminary action by pre-positioning alignment marks on the lens holder before lens assembly. This allows alignment to be performed quickly and efficiently after assembly without requiring complex real-time adjustment, thereby improving productivity while maintaining high alignment precision.
Solution Approach 2:
The alignment marks serve as intermediary elements that facilitate rapid and efficient alignment. These marks enable quick visual or mechanical reference during assembly, improving alignment efficiency and productivity without sacrificing precision.
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 approach enables efficient lens alignment, reduces manufacturing errors, and achieves high resolution while maintaining a compact lens size, thereby improving the image pickup apparatus's performance and cost-effectiveness.
Implementation Method 1
a positive first lens which is movable in a direction perpendicular to an optical axis
Implementation Method 2
a rear lens group... with a negative lens to adjust the Petzval Sum
Data Source
AI summary
There are provided an imaging lens, which is capable of promoting high definition and miniaturization of a small-size image pickup apparatus, and the small-size image pickup apparatus using the same. A aperture diaphragm S is arranged between a first lens L1 and a second lens L2 so that the first lens L1 is configured to be displaced into the orthogonal direction to the optical axis. Even when an error sensitivity of a lens is large, a stable high resolution can be secured by performing a lens alignment by displacing the first lens L1 into the orthogonal direction to the optical axis at the time of assembling, and thereby a high definition image can be obtained.