Patent ID: 7457229
Filing Date: 2008-11-25
Classification: G11B

Abstract:
1. An optical recording medium comprising: a first light transmitting layer; a layer of organic dye configured to have data recorded and read by an optical beam of a first wavelength incident through the first light transmitting layer and to transmit an optical beam of a second wavelength incident through the first light transmitting layer, the layer of organic dye, before recording, has a refractive index under the first wavelength of the optical beam having the first wavelength that is larger than the refractive index of the first light transmitting layer, and the refractive index under the first wavelength after recording is substantially the same as the refractive index of the first light transmitting layer; a second light transmitting layer configured to transmit the optical beam of the second wavelength incident through the layer of organic dye; and a reflecting layer configured to reflect the optical beam of the second wavelength incident through the second light transmitting layer.