An optical information recording-reproducing apparatus comprising a light source, which produces a recording light beam. The apparatus further comprises, a light source producing a reproducing light beam differing in wavelength from the recording light beam, a detecting optical system for detecting a...http://www.google.es/patents/US5379286?utm_source=gb-gplus-sharePatente US5379286 - Optical information recording-reproducing apparatus having a prism
Optical information recording-reproducing apparatus having a prism
