Chinese Academy of Sciences

Qiao Hu

Hao Ruan

Xupeng Yuan

Xinjun Guo

A radial servo control device for a super-resolution optical disc includes an excitation light source, a servo light source, an integrated optical path, focusing units, a servo light detecting unit and a drive control unit; the drive control unit presets N detection error reference values with respect to each guide layer trench irradiated by servo light, and controls corresponding positions of the focusing units in N data tracks below each guide layer trench according to a comparison result between a detection result of servo reflected light and the detection error reference values. The device is applicable to a variety of super-resolution optical discs on the basis of stimulated radiation loss microscopy technology, a two-photon absorption technology, and the like, and achieves accurate radial servo control of super-resolution data tracks (&#x3c;100 nm) without reducing the wavelength of servo light and the width of guide layer trenches.

Growing community of inventors

Shanghai, China

Qiao Hu