Optical scanning device using a plurality of scanning spots.

摘要

An optical scanning device using a plurality of scanning spots (13, 14, 15, 16) for simultaneously scanning a plurality of information tracks (3, 4, 5, 6) of an optical record carrier (1) is described. Additional servo information such as a tilt signal and an angle error signal of the row of scanning spots with respect to the tracks can be obtained by using a plurality of scanning spots (13, .... 16) for generating a plurality of tracking error signals and/or focus error signals. <IMAGE>