OPTICAL INFORMATION STORAGE AND OPTICAL HEAD

摘要

An optical information storage and an optical head capable of a stable information access at a high storage density, comprising a shielding element held in a position close to or in contact with a recording medium surface and provided with a slit crossing the tracks of the recording medium at an angle alpha of up to 45<, a condensing means for condensing light emitted from a light source onto the slit of the shielding element, and a moving means for moving along the slit the light (S) condensed on the slit by the condensing means.