Optical storage medium drive apparatus.

摘要

An optical storage medium drive apparatus for recording information on an optical storage medium (10) and reading out recorded information from the storage medium by using a light beam, comprising: an optical head (4) having a light source (4a) for emitting a light beam and a light detector (4d) for converting an optical signal into an electric signal; an optical system (4b, 4c. 2, 1, 5) for guiding the light beam from the light source (4a) to the optical storage medium (10) and a reflected light beam from the optical storage medium to the light detector (4d), the optical system having therein a light reflector (2) for changing the direction of the light beam: and an optical phase compensator (100) disposed on an optical path between the optical head and the optical storage medium for compensating for retardation of the light beam caused by the reflector (2).