Open AccessQuality assessment of combined quantization-shot-noise-induced decorrelation noise in high-speed digital holographic metrology
Author(s) -
Julien Poittevin,
Pascal Picart,
François Gautier,
Charles Pézerat
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.030917
Subject(s) - decorrelation , optics , shot noise , holography , quantization (signal processing) , physics , computer science , frame rate , coherence (philosophical gambling strategy) , noise (video) , pixel , digital holography , algorithm , computer vision , quantum mechanics , detector , image (mathematics)
this paper discusses on the influence of decorrelation noise induced by quantization and shot-noise when recording digital holograms at very high frame rate. A criterion based on the coherence factor of the hologram phase difference is proposed. The main parameters of interest are the ratio between the reference and the object waves and the sensor dynamics, depending on the photo-electron capacity of pixels. The study is based on a full numerical simulation of the holographic process, which provides useful rules. This leads to define the optimal conditions for recording at very-high frame rate with minimization of the decorrelation noise. Experimental results obtained with frame rate at 50kHz confirm the proposed approach.