Experimental characterization of soot is recognized as essential for enhancing the understanding of aggregation and oxidation mechanisms occurring directly in flames. Laser Induced Incandescence and Line of Sight Attenuation provide information concerning soot volume fraction but only Angular Light Scattering can inform us of the aggregate size by an in-situ approach. In this work, we aim at improving the spatial resolution and the quality of the size and forward scattering coefficient determination. Indeed, the aggregate size is of interest for the understanding of the formation/oxidation processes whereas the forward scattering contains interesting information on the aggregate volume and optical properties. In particular, we aim at investigating the influence of light self-absorption (or trapping) which is suspected to be the cause of the observed dissymmetry of the scattered signal.