Laminated Positioning Member Cutout for Optical Alignment
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Solution Overview
Problem
Existing polarization beam combining modules face challenges in accurately positioning optical components, particularly in directions perpendicular to the optical axis and with multiple components, due to issues like 'float' or 'tilt' caused by the shape of metal plates used in positioning members.
Innovation Solution
A positioning member with a laminated body of thin metal plates, where non-parallel side surfaces intersecting to form a cutout portion allows for precise positioning of optical components, preventing separation and ensuring accurate alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a metal plate positioning member is used, then the structure is simple and easy to manufacture, but positioning accuracy deteriorates due to float or tilt phenomena
Solution Approach 1:
The positioning member is divided into multiple metal plates (first metal plate and second metal plate) that are stacked and fixed together. Each plate can be independently manufactured with simple processes, but their combination provides enhanced positioning capability. The first plate provides a base surface while the second plate provides side surfaces for positioning, eliminating the float and tilt phenomena while maintaining manufacturing simplicity.
2Device complexity
If multiple optical components are positioned on a single plate, then the structure is compact, but positioning accuracy deteriorates due to difficulty in accurate positioning
Solution Approach 1:
The positioning member is segmented into multiple plates with distinct functions: the first metal plate provides the base surface for mounting optical components, while the second metal plate provides side surfaces for positioning. This segmentation allows each component to be positioned accurately relative to the others while maintaining a compact overall structure.
Solution Approach 2:
The positioning system transitions from a two-dimensional single plate to a three-dimensional stacked structure. The first plate provides positioning in one dimension while the second plate adds positioning capability in another dimension through its side surfaces. This dimensional expansion enables accurate positioning of multiple optical components without increasing planar complexity.
3Ease of operation
If side surfaces of metal plates are used for positioning, then positioning is possible, but positioning accuracy deteriorates due to rounded shapes from etching
Solution Approach 1:
The positioning function is segmented between different surfaces of different plates. The first metal plate provides a flat base surface for mounting, while the second metal plate provides side surfaces for positioning. By separating these functions, the side surfaces can be optimized for positioning accuracy without compromising the flatness of the base surface.
Solution Approach 2:
The positioning member is a composite structure combining multiple metal plates with different surface characteristics. The first plate provides a flat mounting surface while the second plate provides positioned side surfaces. This composite structure leverages the advantages of each plate type to achieve both ease of mounting and positioning accuracy.
Data Source
AI summary
A positioning member for positioning optical components includes a laminated body in which a plurality of thin metal plates is laminated. In the positioning member for positioning the optical components by an upper surface of a first plate forming the laminated body and a side surface of a second plate disposed above the first plate, a portion where two non-parallel side surfaces of the second plate for positioning the optical components cross each other includes a cutout portion including a crossing portion of the side surfaces.