Patent ID: 8135219
Filing Date: 2012-03-13
Classification: G11B

Abstract:
1. A method of detecting fail pixels in a holographic storage system, comprising steps of: sequentially providing a plurality of image frames to show on a data plane to make all pixels on the data plane capable of outputting a light state and a dark state; sequentially recording the image frames presented on the data plane in a storage medium; sequentially receiving the image frames recorded in the storage medium by using a detecting apparatus to make each pixel on the detecting apparatus can receive both the light state and the dark state and be capable of outputting a sensing signal with different values corresponding to the light state and the dark state received by the pixel; defining a sensing-difference value, which is a difference of the different values of the sensing signal outputted by one pixel; comparing the sensing-difference value with a threshold value; defining the corresponding pixel is a good pixel if the sensing-difference value is larger than the threshold value; defining the corresponding pixel is a fail pixel if the sensing-difference value is smaller than the threshold value; providing a laser beam to directly emit to the detecting apparatus; defining the fail pixel is on the data plane if the corresponding pixel can output a corresponding sensing signal; and defining the fail pixel is on the detecting apparatus if the corresponding pixel cannot output the corresponding sensing signal.