Sleeve Member Optical Alignment Using Bidirectional Circular Motion
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Solution Overview
Problem
The existing optical assembly alignment processes, particularly the rough alignment method using spiral traces, often cause rotation of the J-sleeve with respect to the optical device, leading to misalignment of the optical isolator and reduced optical coupling efficiency, especially when an optical isolator is assembled in the J-sleeve.
Innovation Solution
The method involves rough alignment of the sleeve member with the J-sleeve by tracing closed loops concentric to each other, alternating the direction of slide in clockwise and counter-clockwise motions to prevent rotation and achieve optimal optical coupling without misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spiral alignment is used for rough alignment, then alignment speed is improved, but rotation of the J-sleeve occurs causing misalignment
Solution Approach 1:
The patent inverts the conventional spiral alignment approach by using alternating clockwise and counter-clockwise circular motions instead. This reversal of the unidirectional spiral motion prevents the J-sleeve from rotating while maintaining efficient rough alignment coverage of the flat end surface.
Solution Approach 2:
The patent applies periodic action by alternating the direction of circular motion between clockwise and counter-clockwise. This periodic direction change prevents cumulative rotation of the J-sleeve while systematically covering the alignment area, resolving the contradiction between speed and precision.
2Productivity
If the sleeve member is spirally moved to find maximum coupling, then alignment efficiency is improved, but the optical isolator becomes misaligned with the polarization direction
Solution Approach 1:
The patent reverses the conventional unidirectional spiral motion to use alternating clockwise and counter-clockwise circular motions. This inversion prevents J-sleeve rotation that would otherwise misalign the optical isolator, maintaining both high alignment efficiency and reliable optical coupling.
Solution Approach 2:
By implementing periodic alternation between clockwise and counter-clockwise motions, the patent eliminates the cumulative rotation effect that causes optical isolator misalignment, while maintaining systematic coverage for efficient rough alignment.
3Loss of time
If conventional spiral alignment is used, then rough alignment is completed quickly, but the twisted angle between J-sleeve and optical device increases
Solution Approach 1:
The patent uses periodic alternation between clockwise and counter-clockwise circular motions during rough alignment. This periodic direction reversal prevents cumulative rotation of the J-sleeve, keeping the twisted angle minimal while maintaining efficient alignment coverage and reducing alignment time.
Solution Approach 2:
By inverting from unidirectional spiral motion to bidirectional alternating circular motion, the patent prevents J-sleeve rotation during rough alignment, achieving both time efficiency and precise twisted angle control.
Data Source
AI summary
A method to assemble an optical assembly is disclosed. The method includes steps of rough and fine alignment between the sleeve member and the J-sleeve, and the alignment of the J-sleeve with the optical device. The rough alignment slides the sleeve member on the J-sleeve as tracing closed loops concentric to each other by alternating a direction of the slide in clockwise and counter clockwise in respective loops.