Reader-writer for three-layer multi-order colour DVD |
Title: |
Reader-writer for three-layer multi-order colour DVD |
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Application Number: |
01134740 |
Application Date: |
2001/11/09 |
Announcement Date: |
2002/07/03 |
Pub. Date: |
2004/03/17 |
Publication Number: |
1356695 |
Announcement Number: |
1142547 |
Grant Date: |
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Granted Pub. Date: |
2004-3-17 |
ApplicationType: |
Invention |
State/Country: |
11[China|beijing] |
IPC: |
G11B 7/135 |
Applicant(s): |
Qinghua Univ |
Inventor(s): |
Qi guosheng, Mai Xuesong, Xu Duanyi |
Key Words: |
Reader-writer, three-layer, multi-order, colour DVD |
Abstract: |
A R/W device for three-layer multi-order colour DVD has three same optical sub-systems. The main light axises of two sub-systems are parallel and perpendicular to the light axis of the third sub-system. Three laser beams can be parallelly output to read or write on said DVD by use of lasers, shaping collimator, polarizing splitter, 1/4 wave plate, splicing-splitting right-angle prism set and a chromatic object lens structure. Its advantage include high R/W speed, and compact structure. |
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Priority: |
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PCT: |
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