Title :
Beam-shaping random phase mask for holographic storage
Author :
Knittel, Joachim ; Przygodda, Frank ; Malki, Oliver ; Trautner, Heiko ; Richter, Hartmut
Author_Institution :
Deutsche Thomson OHG, Villingen-Schwenningen
Abstract :
The reference beam of a holographic data storage system should have a flat intensity profile to achieve a homogenous illumination of the signal beam inside the recording medium. In systems with a focused reference beam this is usually not the case. We introduce a binary phase mask with beam shaping characteristics that improves the homogeneity of the reference beam in the focal plane. Simulations show a significant improvement of the data page image quality.
Keywords :
focal planes; holographic storage; holography; masks; optical design techniques; optical images; beam-shaping random phase mask; binary phase mask; data page image quality; focal plane; hologram; holographic data storage; homogenous illumination; recording medium; reference beam homogeneity; signal beam; Data storage systems; Diffraction; Filtering; Focusing; Frequency; Holographic optical components; Holography; Lighting; Low pass filters; Optical modulation;
Conference_Titel :
Optical Data Storage Topical Meeting, 2009. ODS '09.
Conference_Location :
Lake Buena Vista, FL
Print_ISBN :
978-1-4244-3342-1
Electronic_ISBN :
978-1-4244-3343-8
DOI :
10.1109/ODS.2009.5031756
