Method for detecting signals of multi-dimensional optical storage optical disk
A technology of signal detection and optical storage, applied in the direction of optical recording/reproduction/erasing methods, optical recording systems, etc., can solve the problems of detection and calculation steps, inability to distinguish record characters, and complex detection devices, etc., and achieve high accuracy , easy operation and high detection accuracy
Active Publication Date: 2014-04-30
HUAZHONG UNIV OF SCI & TECH
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[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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[0025] The present invention will be further described below in conjunction with the accompanying drawings.
[0026] The inventors of the present application found that: after the incident laser light is reflected by the surface of the record symbol, the magnitude of the reflected light intensity has a cosine-like relationship with the angle of the incident light source, and when the line deviation angle of the incident light is consistent with the angle of the record symbol, the reflected light The light intensity reaches the maximum value; when the line declination angle of the incident light is perpendicular to the angle of the record mark, the light intensity of the reflected light reaches the minimum value. For example: select record 1 (depth 162.5nm, angle 45°) for verification, focus the incident light to the center of record 1, rotate the incident light 180°, detect the change information of reflected light intensity, and get the following: image 3 A plot of reflected...
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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 signal detection method of a novel multi-dimensional optical storage disc. Background technique [0002] In the 21st century, mankind has entered the information society, and the knowledge economy has become a powerful driving force for promoting social progress and scientific and technological development. Information storage, transmission and processing are one of the most important guarantees for improving the overall development level of society. Due to the multimediaization of information, people now need to deal with moving images and high-definition images. 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 effectively store and manage more and more data and how to ap...
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Inventor 李震缪向水倪日文曾笔鉴
Owner HUAZHONG UNIV OF SCI & TECH