Optical coefficients of agar-based phantoms with Al2O3 nano- and micro-scatterers (IAD-retrieved, 400-700 nm)

This dataset contains IAD-retrieved absorption (μa) and reduced scattering (μs') coefficients of agar-based optical phantoms containing Al2O3 nanoparticles (50 nm) and microparticles (5 μm) at concentrations of 2.4 and 6.0 mg/mL, as well as Mie-computed anisotropy factors g(λ) for both particle systems. The dataset comprises 514 CSV files organized as follows: absorption (MUA) and reduced scattering (MUSP) spectra for NP and MP phantoms across all measured thicknesses and replicates (512 files), and spectrally resolved anisotropy factors for 50 nm and 5 μm particles (2 files). Measurements were performed using a double integrating sphere system (Cary 5000, DRA-2500) at the Instituto de Física, Benemérita Universidad Autónoma de Puebla, México. Optical properties were retrieved using the Inverse Adding-Doubling (IAD) method with Mie-informed anisotropy factors computed with PyMieScatt. All spectra cover the visible range (400-700 nm). Units: wavelength in nm, optical coefficients in mm⁻¹.