| (11) | EP 0 223 191 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Optical head Apparatus |
(57) The apparatus for reading out an optical information carrier comprising a semiconductor laser beam source (1), a condenser lens system (6) and a beam splitter (5) interposed therebetween in an optical system wherein the noise level may be beyond the allowable limit due to the excessive amount of the laser beam which is made incident on the laser beam source after being reflected by the information carrier (7), the reflected light attenuating means (50) is provided between the optical information carrier and the semiconductor laser beam source, so that the noise level can be set to remain within the allowable limit. |