CD quality detecting device |
Title: |
CD quality detecting device |
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Application Number: |
200710074382 |
Application Date: |
2007/05/21 |
Announcement Date: |
2007/12/05 |
Pub. Date: |
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Publication Number: |
101083122 |
Announcement Number: |
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Grant Date: |
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Granted Pub. Date: |
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ApplicationType: |
Invention |
State/Country: |
94[] |
IPC: |
G11B 20/18G11B 7/00 |
Applicant(s): |
Graduate School at Shenzhen, Tsinghua University |
Inventor(s): |
Ma Jianshe, Wang Yuxiu, Wang Shuoshi, Shi Hongwei, Zhang Buqing, Cheng Xuemin, Mao Leshan, Qi Guosheng, Pan Longfa, Yan Shuang, Sun Manlong, Yang Mingsheng |
Key Words: |
CD, quality, detecting device |
Abstract: |
The invention discloses a disc quality detection installment, which includes the optics head, the put-head system, the driving system, the servo system and the quality appraisal system; the servo system produces the control signal for the actuation part, the read-write facula which controls the optics head focuses to the testing position of the measured disc and causes the optics head focusing the closed loop; the optics head sends the laser which focuses to the read-write facula and shines to the information level of the measured disc, and receives the signal which is reflected from the measured disc information level, through the equilibrium and magnify of the put-head system; the quality appraisal system receives the quality appraisal signal which comes from the servo system and operates it, and finally appraises the measured disc quality; the quality appraisal signal is the RF signal and the FE signal which calculates in the put-head system. The disc quality detection installment which uses this invention technical scheme to judge the disc quality through the RF signal and the FE signal, thus realizes the high speed online examination. |
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