Bit-mapped Holograms Using Phase Transition Mastering (PTM) and Blu-ray Disks

Dr Donald Barnhart
Barnhart Optical Research LLC, United States

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Due to recent advances made in data storage, cloud computing, and Blu-ray mastering technology, it is now straight forward to calculate, store, transfer, and print bit-mapped holograms that use terabytes of data and tera-pixels of information. This presentation reports on the potential of using the phase transition mastering (PTM) process to construct bit-mapped, computer generated holograms with continuous-tone phase levels and spatial resolutions of 5000 line-pairs/mm (70 nm pixel width). In particular, for Blu-ray disk production, Sony has developed a complete process that could be alternately deployed in holographic applications. The phase transition mastering (PTM) process uses a 405 nm laser to write phase patterns onto a layer of imperfect transition metal oxides that is deposited onto an 8 inch silicon wafer. After the master hologram has been constructed, its imprint can then be cheaply mass produced with the same process as Blu-ray disks or embossed holograms. Unlike traditional binary holograms made with expensive e-beam lithography, the PTM process enables continuous phase levels using inexpensive optics similar to consumer-grade desk-top Blu-ray writers. This PTM process could revolutionize holography for entertainment, industrial, and scientific applications. The author has filed a Provisional Patent on the application of PTM in holography.