Automated tilt compensation in acoustic microscopy.

Area of Science:

• Materials Science
• Non-destructive Testing
• Acoustic Imaging

Background:

• Scanning Acoustic Microscopy (SAM) is a key non-destructive technique for 3D imaging.
• Accurate time-of-flight (ToF) measurements are crucial for SAM's precision.
• Sample or stage tilt introduces ToF shifts, compromising image accuracy.

Purpose of the Study:

• To develop an automated method for compensating ToF shifts in SAM caused by sample tilt.
• To improve the precision of topographic and tomographic profiles obtained from SAM.
• To offer an alternative to conventional manual methods for tilt compensation.

Main Methods:

• Proposed an automated tilt compensation technique for acoustic signals in SAM.
• Utilized a novel curve fitting method to correct ToF data.
• Did not require manual selection of coordinate points from time-domain data.

Main Results:

• Successfully compensated for time shifts in ToF data of a coin with varying tilt angles (6.67°, 12.65°, 15.95°).
• Achieved a time offset correction accuracy of 45 arcsec.
• Demonstrated the effectiveness of the automated method in improving SAM data accuracy.

Conclusions:

• The proposed automated tilt compensation method enhances the precision of SAM imaging.
• This technique offers a more efficient and accurate alternative to manual methods.
• The findings support the potential of this method for advanced SAM applications.