Optical holographic device and method with gain compensation
AssigneeKoninklijke Philips Electronics N.V.
InventorsFloris Maria Hermansz Crompvoets, Frank Jeroen Pieter Schuurmans
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Abstract
The present invention relates to an optical holographic device and a corresponding method for reading out a data page recorded in a holographic recording medium (106). In order to improve the bit error rate a reconstruction means (115) provided for reconstructing a dark and a light image from a separate checkerboard page comprising a pattern of dark and light pixels or from the detected imaged data page, and an image correction means (116) is provided for correcting said detected imaged data page by gain compensation using said reconstructed dark and light images.
Claims12
Optical holographic device for reading out a data page recorded in a holographic recording medium (106), said device comprising:
- image forming means (104, 105) for forming an imaged data page,
- image detection means (114) for detecting said imaged data page,
- reconstruction means (115) for reconstructing a dark and a light image from a separate checkerboard page (200) comprising a pattern of dark and light pixels or from said detected imaged data page (400), and
- image correction means (116) for correcting said detected imaged data page by gain compensation using said reconstructed dark and light images.
Method for reading out a data page recorded in a holographic recording medium (106), said method comprising the steps of:
- forming an imaged data page,
- detecting said imaged data page,
- reconstructing a dark and a light image from a separate checkerboard page comprising a pattern of dark and light pixels or from said detected imaged data page, and
- correcting said detected imaged data page by gain compensation using said reconstructed dark and light images.
Dependencies are inferred from the claim text.