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Optical combination device for reading/writing digital colour multi-layer n-order CD
Title：	Optical combination device for reading/writing digital colour multi-layer n-order CD
Application Number：	00103231	Application Date：	2000/03/17
Announcement Date：	2000/09/13	Pub. Date：
Publication Number：	1266260	Announcement Number：	1106009
Grant Date：		Granted Pub. Date：	2003-4-16
ApplicationType：	Invention	State/Country：	11[China|beijing]
IPC：	G11B 7/125, G11B 7/135
Applicant(s)：	Qinghua Univ.
Inventor(s)：	Xu Duanyi, Qi Guosheng, Gong Mali
Key Words：	Optical combination device, reading/writing, digital, colour, multi-layer n-order, CD
Abstract：	The present invention relates to a phot0-synthesizer device for reading and writing digital colour multi-layer and multi-order CD, including laser and phot-synthesizer, said photo-synthesizer is formed from collimating lens and phot-synthesizing prism, and said invented photo-synthesizer device is characterized by that the light emitted from laser is passed through the collimating lens, and sent out from another face of photo-synthesizing prism to form coaxial parallel beams, and these multi-wavelength coaxial parallel beams are used for reading and writing colour multi-layer multi-order CD. Said invention implements multi-beam surface coupling, and provides effective light source for high-speed reading and writing colour digital multi-layer multi-order CD, and can greatly raise storage capacity of CD and signal reading and writing speed.
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