Deterministic method for generating removal functions through online beam density regulation
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View abstract on PubMed
Summary
This summary is machine-generated.This study introduces a new method for ion beam figuring (IBF) to precisely control optical element manufacturing. It uses online regulation of ion beam density for dynamic removal function generation, improving accuracy and flexibility.
Area Of Science
- Optical Engineering
- Materials Science
- Manufacturing Technology
Background
- Ion beam figuring (IBF) is crucial for ultra-high-precision optical manufacturing, enabling atomic-level material removal.
- Current IBF methods face challenges with parameter drift and inflexibility in removal function generation, hindering dynamic error correction across frequency bands.
Purpose Of The Study
- To develop a deterministic method for generating removal functions in IBF through online regulation of ion beam density.
- To enhance the adaptability and precision of IBF for full-band error control in optical element figuring.
Main Methods
- Analyzed the influence of stand-off distance and aperture on ion beam density.
- Developed a multi-task learning prediction model for removal function parameters and beam current distribution.
- Implemented online regulation of ion beam density for dynamic removal function generation.
Main Results
- Experimental validation confirmed that stand-off distance and aperture adjustments effectively regulate beam density.
- The multi-task learning model achieved a determination coefficient (R²) > 0.9716 and mean squared error (MSE) < 0.0079.
- The generated removal function accuracy exceeded 96% compared to the target removal function, meeting precision requirements.
Conclusions
- The proposed deterministic method overcomes limitations of traditional fixed-parameter removal functions in IBF.
- The dynamic parameter adjustment capability supports advanced strategies like variable beam diameter modification for optical manufacturing.
- This approach offers a novel solution for precise full-band error correction in ultra-high-precision optical elements.
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