| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for recording and reproducing optical information stable in operation by decreasing remarkably or to zero a recording luminous flux leaking into an optical detector for controlling reproduction. SOLUTION: An optical detector 30 is arranged at a side in which a reproducing luminous flux passes to a halfmirror 51, and a band path film 53 is formed on the rear side of the halfmirror 51 to reflect a recording luminous flux leaking-in through a dichroic mirror 52. Thereby, the reproducing luminous flux reflected from a recording medium is constituted so as to pass through the halfmirror 51 and is made incident to the optical detector, and a film to reflect the recording luminous flux is formed on the rear side of the halfmirror 51, so it is possible to prevent leaking-in light of recording luminous flux from intruding into the optical detector as noise, to stabilize focussing control and tracking control, and to execute exact verification at the time of verifying and recording simultaneously. |
