Servo controlling method of optical information processing...

Details Servo controlling method of optical information processing... Servo controlling method of optical information processing...

2006-11-27

2010-06-29

Feild, Joseph H (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S044370, C369S112280, C369S112160

Reexamination Certificate

active

07746752

ABSTRACT:
A servo controlling method for controlling an information processing apparatus using a hologram. The method includes a step of irradiating a holographic recording medium with light having a first wavelength and irradiating the holographic recording medium with light having a second wavelength, different from the first wavelength, a step of directing first return light by the light of the first wavelength and second return light by the light of the second wavelength to be incident on the same light receiving element, and a step of performing servo control by separating the first return light from the second return light at the light receiving element.

REFERENCES:
patent: 6646975 (2003-11-01), Uchizaki et al.
patent: 2003/0016614 (2003-01-01), Vo-Dinh
patent: 2004/0212859 (2004-10-01), Tsukagoshi
Horigome, H., et al. “Holographic Medium Will Achieve 200G Bytes in 2006,” Nikkei Electronics, Jan. 17, 2005, pp. 105-114, with partial translation.

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