The study focuses on the elongation of reconstructed microparticles in holographic particle measurement. We propose a theoretical formula for particle elongation that requires the determination of the coefficient 𝑚. Previously, the coefficient was set as 2 based on particle size distribution comparisons. However, its suitability computational for other diameters was unclear. We directly compare elongation from particle patterns printed on a glass plate with varying diameters to the theoretical formula. We found that 𝑚 is equal to 1, not 2. This finding is crucial for accurate holographic particle measurement.
