Three-dimensional dimension of laser speckle

Area of Science:

• Optics and Photonics
• Metrology

Background:

• The 3D dimension of laser speckle is a key parameter in advanced optical measurement techniques.
• Techniques like laser holographic interferometry, laser speckle photography, and holospeckle interferometry rely on accurate speckle dimension analysis.

Purpose of the Study:

• To introduce a statistical analysis method for calculating the three-dimensional dimension of laser speckle.
• To provide a theoretical framework and experimental validation for speckle dimension computation.

Main Methods:

• Statistical analysis was employed to develop a computational method for speckle dimension.
• Explicit formulas were derived for laser speckle originating from a circular scattering area in free space.

Main Results:

• The study successfully derived explicit formulas for computing the 3D dimension of laser speckle.
• Experimental investigations provided supporting results that validate the derived formulas.

Conclusions:

• The presented statistical analysis offers a reliable method for determining the 3D dimension of laser speckle.
• The derived formulas and experimental validation enhance the understanding and application of laser speckle in metrology.