US 8,233,368 B2 · Method and system for bit prediction using a multi-pixel detector

Abstract

The present techniques provide methods and systems for more reliable reading of optical data disks. In embodiments, a multi-pixel detector that is segmented into multiple areas, or detector segments, may be used to detect a pattern in the light reflected from an optical data disk. The pattern may include light scattered from a single bit that may be under a center detector, as well as light scattered from proximate bits. The detector system may then combine the quantized values from each of the detector segments mathematically to determine the presence or absence of a bit or bits of data. The mathematical combination may also use data that is known about the status of adjacent data bits (such as previously read bits, or bit patterns which are allowed or not allowed by specific data encoding schemes) to improve the accuracy of the bit prediction.

Claims16

Dependent claims

A method of reading data from a holographic optical data disk, comprising:

emitting a first read beam toward a holographic optical data disk, wherein the first read beam is configured to substantially simultaneously illuminate a plurality of micro-reflectors on the holographic optical data disk;
detecting a first sample comprising light from the first read beam reflected from the plurality of micro-reflectors by a multi-pixel detector;
emitting a second read beam towards the holographic optical data disk, wherein the second read beam is configured to substantially simultaneously illuminate a plurality of micro-reflectors on the holographic optical data disk;
detecting a second sample comprising light from the second read beam reflected from the plurality of micro-reflectors by the multi-pixel detector;
and
analyzing the first sample and the second sample to predict a state of a bit.

3 more elements

Dependencies are inferred from the claim text.

Method and system for bit prediction using a multi-pixel detector

Life of this patent

Method and system for bit prediction using a multi-pixel detector

Life of this patent

Abstract

Claims16