Sensor system for optical disc drive

Details Sensor system for optical disc drive Sensor system for optical disc drive

1998-07-22

2000-08-15

Edun, Muhammad

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

103 4412, 103 4423, 103 4441, G11B 709

Patent

active

061046892

ABSTRACT:
Disclosed is a sensor system for an optical disc drive. The sensor system is provided with a collective lens, a beam splitting element that divides the light beam received and emerged by the collective lens into at least two beams in a first direction, a first and a second sensor for receiving the beams divided by the beam splitter. A focusing error signal is generated, based on output signals of each of light receiving areas of the first and second sensors, in accordance with a difference of sizes of spots formed on the first and second sensors.

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