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High density digital videodisc using 635 nm laser diode

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5 Author(s)
Tsuchiya, Y. ; Hypermedia Res. Center, Sanyo Electr. Co. Ltd., Gifu, Japan ; Tada, K. ; Terasaki, H. ; Ichiura, S.
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By developing a high resolution pick-up using a red laser diode with a wavelength of 635 nm and by examining the disc parameters, we have developed a CD-ROM which has a recording density four times that of existing CDs. The track pitch of this CD-ROM is 0.85 μm and the recording linear velocity is 0.7 m/s. With these disc parameters, a storage capacity of 2.2 GB was obtained. We recorded digital motion pictures with a data transfer rate of 4 Mbps onto the disc and succeeded in the realization of a high quality digital videodisc with one hour of playback time

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Consumer Electronics, IEEE Transactions on  (Volume:40 ,  Issue: 3 )