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Control method of multistage mother disk etching recording and laser driving device for etching and recording

A control method and technology of a driving device, which are applied in optical recording/reproducing/erasing methods, manufacturing of optical record carriers, beam sources, etc., can solve the problem of not retrieving multi-level master disks and recording multi-level power gating and adjusting devices, etc. question

Inactive Publication Date: 2005-05-04
TSINGHUA UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the existing literature, there are documents about the production and reproduction technology of multi-level master discs, but after searching, there is no control method for multi-level master disc recording and realization of multi-level power gating and adjustment devices at home and abroad. literature

Method used

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  • Control method of multistage mother disk etching recording and laser driving device for etching and recording
  • Control method of multistage mother disk etching recording and laser driving device for etching and recording
  • Control method of multistage mother disk etching recording and laser driving device for etching and recording

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Embodiment Construction

[0036] The specific embodiment of the present invention will be described with reference to the accompanying drawings.

[0037] like figure 1Shown is the block diagram of the control system required to realize the control method. In the figure, the workbench realizes the rotation and translation through the rotation motor and the translation motor, so that the recording track is a spiral trajectory with the center of the master disk as the origin, and the laser interferometer transmits the polar coordinates of the workbench to the computer for processing , and adjust the rotation speed and translation speed of the workbench according to the processing results, so as to keep the linear velocity V along the recording track on the master disk constant. In addition, the computer compares the actual position of the workbench with the position information in the processing information, determines the power order corresponding to the position, and turns on the laser with this power ...

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Abstract

A control method for recording a multi-stage master disk and a laser driving device for recording belong to the technical field of micro-engineering in recording a master disk. It is characterized in that the control method is based on the traditional second-order master recording control method, adding multi-level power gating control and multi-level power stability control, and the present invention also designs a laser according to the control method. The driving device adopts a driving circuit capable of realizing multi-stage power gating and adjustment, and the driving circuit includes a power gating adjustment circuit composed of a triode resistance network and a differential operational amplifier and a power amplifying circuit. The control method can effectively control the multi-level recording on the master disc. The laser drive device can change the current flowing through the laser, so that the laser emits laser light with different powers, so as to record signals of different gray levels on the photosensitive layer of the master disc. , to achieve multi-level burning.

Description

Technical field: [0001] A control method for recording a multi-stage master disk and a laser driving device for recording belong to the technical field of micro-engineering in recording a master disk. Background technique: [0002] Traditional second-order optical discs record data through the pits recorded on the disc, and each information symbol can only record two states of "0" and "1". The capacity and transmission rate of this optical disc are low. Professor Xu Duanyi from Tsinghua University proposed a multi-level optical disc storage method. This method is to coat a layer of photosensitive layer on the disc. The photosensitive layer has different absorption rates for different intensities (powers) of laser light, forming different gray areas. By focusing lasers with different powers on the layer, a series of grayscale information can be generated to form a multi-level optical disc. This multi-level optical disc has a large storage capacity and a high transfer rate. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/0045G11B7/126G11B7/26
Inventor 徐端颐范晓冬齐国生钱坤佘鹏蒋培军
Owner TSINGHUA UNIV
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