(DH) Noise and Signal scaling factors in Digital Holography in week illumination: relationship with Shot Noise. Auteur(s): Lesaffre Max, Verrier N., Gross M. (Article) Publié: Applied Optics, vol. 52 p.A81--A91 (2013) Texte intégral en Openaccess : Ref HAL: hal-00741432_v1 Ref Arxiv: 1210.3944 DOI: 10.1364/AO.52.000A81 WoS: 000313745800009 Ref. & Cit.: NASA ADS Exporter : BibTex | endNote 20 Citations Résumé: We have performed off axis heterodyne holography with very weak illumination by recording holograms of the object with and without object illumination in the same acquisition run. We have experimentally studied , how the reconstructed image signal (with illumination) and noise background (without) scale with the holographic acquisition and reconstruction parameters that are the number of frames, and the number of pixels of the reconstruction spatial filter. The first parameter is related to the frequency bandwidth of detection in time, the second one to the bandwidth in space. The signal to background ratio varies roughly like the inverse of the bandwidth in time and space. We have also compared the noise background with the theoretical shot noise background calculated by Monte Carlo simulation. The experimental and Monte Carlo noise background agree very well together. |