Fig. 5: Speckle contrast reduction.

Objective speckle pattern at 450, 520, and 638 nm for two Aero-BN samples with high (ρ_Aero-BN ~0.68 mg cm⁻³) and low (ρ_Aero-BN ~0.17 mg cm⁻³) density, a porous ZnO microrod network (ρ_T ~300 mg cm⁻³) and a commercial plate diffuser. Values for speckle contrast are in %.