BEAM RECORDING DEVICE, AND BEAM ADJUSTING METHOD

WIPO Patent Application WO/2007/111260

A1

Provided is a beam recording device comprising a displacement detector having at least three displacement sensors arranged at different angles in the radial directions of a turntable, a shape calculator for calculating shape data corresponding to the displacement of the side face of the turntable in the radial directions, on the basis of the detected displacements of the aforementioned at least three displacement sensors, a rotational deflection computing unit for computing the rotational deflection, as containing a rotational asynchronous component and a rotational synchronous component, of the turntable, on the basis of the detected displacement from at least one of the displacement sensors and the shape data, and a beam irradiation position adjustor for adjusting the irradiation position of an electron beam on the basis of the rotational deflection.

JP3802538	FOCUS DETECTION EMITTER, ELECTRON DATA STORAGE DEVICE, FOCUS ADJUSTING METHOD FOR ELECTRON BEAM, AND FOCUS DECISION METHOD FOR ELECTRON BEAM
JPH05159735	ELECTRON BEAM PROJECTING DEVICE
JP6384570	Information storage device and information reading device

KITAHARA HIROAKI (JP)
WADA YASUMITSU (JP)

PCT/JP2007/056057

October 04, 2007

March 23, 2007

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PIONEER CORP (JP)
KITAHARA HIROAKI (JP)
WADA YASUMITSU (JP)

G11B9/10

JP2003317285A	2003-11-07
JP2003036548A	2003-02-07

YAMADA R.: "Shin'endo Sokutei ni Okeru 2 Tenho Oyobi 3 Tenho no Yuyosei", JOURNAL OF JAPAN SOCIETY FOR DESIGN ENGINEERING, vol. 36, no. 4, April 2001 (2001-04-01), pages 137 - 142

FUJIMURA, Motohiko (Togeki-Bldg. 1-1, Tsukiji 4-chome, Chuo-k, Tokyo 45, JP)

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