3D-reconstructions for the estimation of ice particle's volume using a two-views interferometric out-of-focus imaging...

Area of Science:

• Atmospheric science
• Optical physics
• Aerosol science

Background:

• Accurate ice crystal characterization is crucial for airborne research and aviation.
• Interferometric out-of-focus imaging offers a promising method for particle analysis.

Purpose of the Study:

• To assess the impact of 3D shape reconstruction on ice particle volume estimation.
• To quantify the error introduced by shape assumptions in interferometric imaging.

Main Methods:

• Utilizing a pair of interferometric images from perpendicular viewpoints.
• Estimating ice particle volume based on 2D autocorrelation derived from images.
• Analyzing the influence of assumed particle shapes on volume calculations.

Main Results:

• The relative error in volume estimation reached approximately 30%, contingent on the initial 3D shape assumption.
• Different particle shapes can yield similar interferometric images due to 2D autocorrelation properties.
• Errors from image acquisition processes were found to be more significant than those from shape reconstruction choices.

Conclusions:

• While 3D shape reconstruction impacts ice particle volume estimation, it is less critical than image acquisition errors.
• Further research should focus on mitigating errors associated with the interferometric image acquisition process for improved accuracy.