Patent ID: 7787164
Filing Date: 2010-08-31
Classification: G11B,Y10S

Abstract:
1. A method to evaluate a holographic data storage medium, comprising the steps of: holographically encoding an evaluation data pattern in said holographic data storage medium by a manufacturer of said holographic data storage medium by interacting a data beam comprising said evaluation data pattern with a reference beam; supplying a holographic data storage system comprising a stored evaluation data pattern, a matched filter, a light source, and an optical detector; supplying said holographic data storage medium comprising said encoded evaluation data pattern, wherein said holographic data storage medium has not been sold in commerce; establishing a threshold manufacturer overlap value; illuminating said holographic data storage medium with said reference beam emitted by said light source to generate a pre-sale reconstructed data beam comprising a reconstructed evaluation data pattern; projecting said pre-sale reconstructed data beam onto said optical detector; calculating a pre-sale overlap value using said reconstructed evaluation data pattern, said stored evaluation data pattern, and said matched filter; determining if said pre-sale overlap value is greater than or equal to said threshold manufacturer overlap value; operative if said pre-sale overlap value is greater than or equal to said threshold manufacturer overlap value, offering said holographic data storage medium for sale in commerce; operative if said pre-sale overlap value is not greater than or equal to said threshold manufacturer overlap value, not offering said holographic data storage medium for sale in commerce.