A week in tech

A round up of all the latest tech news from Asia.

Japan

Hardware

- Citizen Watch Co. has developed a device that facilitates the recording of data to two separate layers on one side of a DVD disc. The device corrects for spherical aberrations of light from the write laser, allowing for faithful switching between a pair of recording layers that are separated by a distance of only several microns. Because of problems with spherical aberration, present DVD recorders can only write data to a single layer....

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