| 摘要 |
The present invention relates to an optical information carrier for recording information by means of an optical beam, said optical information carrier comprising a substrate layer (S), a recording layer (P) including a thermochromic material having temperature-dependent optical characteristics or a photochromic material having light-dependent optical characteristics for selectively improving the sensitivity during recording and/or read-out, and a cover layer (C). To achieve an increase reflectivity the recording layer (P) at elevated temperature or high light intensity, respectively, and a very high transmission and low reflectivity at ambient temperature or low light intensity, respectively, it is proposed to use a thermochromic or photochromic material that has an imaginary part k of the complex refractive index n being larger than 0 at elevated temperature or high light intensity, respectively. The present invention relates also to a method of determining the thickness of a recording layer of such an optical information carrier and to a read-out device for reading data from such an optical information carrier. |
