A signal detection method for a multi-dimensional optical storage disc

Abstract

The invention provides a method for detecting signals of a multi-dimensional optical storage optical disk. Recording signs with different depths and different angles are processed on a disk body of the multi-dimensional optical storage optical disk, and incident light is focused on the surfaces of recording pits through a spectroscope and a focusing lens and then enters a light intensity detector through the focusing lens and the spectroscope. When laser is focused on the centers of the recording signs, a light source is rotated 180 degrees, and the information that the light intensity changes along with the change of the angle of the light source is read out; the angles of the recording signs are distinguished through the rotating angle, corresponding to the maximum value of light intensity signals, of the light source, and the depths of the recording signs are distinguished through the average amplitude value of the light intensity signals. Through the method for detecting the signals of the multi-dimensional optical storage optical disk, the signal interference between adjacent recording signs can be effectively avoided, the signal detection rate of the multi-dimensional optical storage optical disk is obviously improved, and consequently the density of the multi-dimensional optical storage optical disk is improved.

Description

technical field [0001] The invention belongs to the technical field of photoelectric information storage, and in particular relates to a novel signal detection method for a multi-dimensional optical storage optical disc. Background technique [0002] In the 21st century, human beings have entered the information society, and the knowledge economy has become a powerful driving force for social progress and scientific and technological development. Information storage, transmission and processing are one of the most important guarantee conditions for improving the overall development level of society. Due to the multimediaization of information, people now need to process moving images, high-definition images, and the like. IDC predicts that the total amount of global data will increase by 50 times by 2020, and the demand for data storage will increase by more than 50 times. Facing the 21st century, people urgently need to consider how to efficiently store and manage more and...

AI Technical Summary

Problems solved by technology

[0007] However, the signal detection method in the data readout method of the multi-dimensional optical storage disc disclosed in the applicant's previous patent application still has defects and deficiencies: one is to detect the polarization state of the reflected light through the polarization detection module, and distinguish The different angles of the recording pits, the detection and calculation steps are complicated, and the operation is inconvenient; the second is that the angle range of the record symbol can be distinguished from 0-90 degrees, and the record symbol with an angle of 90-180 degrees cannot be distinguished; the third is that the detection device includes phase detection Module, polarization detection module, wavelength detection module and many other equipment, the detection device is complex

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