Patent ID: 7684300
Filing Date: 2010-03-23
Classification: G11B

Abstract:
1. An optical information recording and reproducing apparatus for recording and reproducing information onto and from an optical information recording medium which includes at least a substrate, a reflection layer formed on the recording surface of the substrate, an optical information recording layer, a super resolution layer having a complex refractive index reversibly changing with a temperature change, and a protection layer, the apparatus comprising a laser emission control unit for emitting the laser light to record or reproduce the optical information in the optical information recording medium and capable of changing the emission pattern of the laser light, a pickup for radiating by focusing the laser light on the surface of the optical information recording medium and receiving the light reflected from the optical information recording medium, a spindle and a spindle motor for supporting and rotationally driving the optical information recording medium, and a reproduction signal processing unit for arithmetically processing the received signal, wherein the laser light is emitted in pulses by the laser emission control unit, and the reproduction signal processing unit produces a reproduction signal from the result of the arithmetic process using the reproduction signals from the pulse emitting portion and the bias emitting portion of the pulse light.