Method and device for reading digital color CD
Title:
Method and device for reading digital color CD
Application Number:
200410037430
Application Date:
2004/04/30
Announcement Date:
2005/01/26
Pub. Date:
2006/06/07
Publication Number:
1571040
Announcement Number:
1258761
Grant Date:
2006-6-7
Granted Pub. Date:
2006-6-7
ApplicationType:
Invention
State/Country:
11[China|beijing]
IPC:
G11B 7/135, G11B 7/125
Applicant(s):
Tsinghua University
Inventor(s):
Xu Duanyi, Song Jie, Qi Guosheng
Key Words:
Method, device, reading, digital color CD
Abstract:
The reading method and apparatus of digital colored CD belong to the CD information-storing field. This invention discloses the reading method and apparatus of digital colored CD. It adopted the white light LED-illuminating source, shaping collimating mirror, color-splitting prisms, filtering slice, and achromatic objective structure. It focus the parallel light beam from the white light LED illuminating source to the digital colored CD through the achromatic objective to realize the reading process. This invention avoids the coordination difficulty of light waves with several frequencies in different laser, and it needs no light combination apparatus. The structure of reading device is simple. The reading device can also read the digital colored CD in parallel mode, and increase the CD data reading speed and storage capacity.
Claim:
Priority:
PCT:
LegalStatus:

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2008-4-17
  Selected patents owned by Tsinghua University filed in 2005 are loaded.
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