HOLOGRAPHIC RECORDING MEDIUM WITH CONTROL OF PHOTOPOLYMERIZATION AND DARK REACTIONS

• Main Authors: WILLIAM L WILSON, MICHAEL C COLE, FREDRIC R ASKHAM
• Format: Patent
• Language: English
• Published: 26.07.2012
• Subjects: CALCULATING; CINEMATOGRAPHY; COMPUTING; COUNTING; ELECTROGRAPHY; HANDLING RECORD CARRIERS; HOLOGRAPHIC PROCESSES OR APPARATUS; HOLOGRAPHY; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHOTOGRAPHY; PHYSICS; PRESENTATION OF DATA; RECOGNITION OF DATA; RECORD CARRIERS

PROBLEM TO BE SOLVED: To provide a high-density holographic data storage medium.SOLUTION: The present invention relates to a system, as well as articles and a holographic recording medium comprising the system, where the system comprises: a polymerizable component comprising at least one photoactive polymerizable material; and a photoinitiator component comprising at least one photoinitiator for causing the polymerizable component to polymerize to thereby form a plurality of holographic gratings when activated by exposure to a photoinitiating light source; wherein when a portion of the polymerizable component has been polymerized to form at least one holographic grating, the unpolymerized portion of the polymerizable component is resistant to further polymerization when the polymerizable component is not exposed to the photoinitiating light source. The present invention also provides methods for forming at least one holographic grating in a holographic recording medium having the photopolymerizable system.