| 摘要 |
A digital recording medium, such as a compact disc (10), having a substrate (12), a reflective layer (14) and a protective layer (16) includes a near infrared fluorophore in one of the layers. The near infrared fluorophore can be incorporated into the CD (10) by coating, admixing, blending, or copolymerization and in an amount to impart a detectable fluorescence from the fluorophore when exposed to electromagnetic radiation having a wavelength ranging from about 670 nanometers (nm) to about 1100 nm. A method of marking a CD (10) with an invisible marking and an apparatus for detecting the fluorophore is further provided. |
| 申请人 |
EASTMAN CHEMICAL COMPANY;CYR, MICHAEL, J.;CLAUBERG, HORST;HELTON, TONY, W.;NELSON, GREGORY, W.;MEADE, RANDY, B.;MOORE, JAMES, E.;OWENS, G., RUSSELL;JACKSON, BARBARA, C.;KRUTAK, JAMES, JOHN |
发明人 |
CYR, MICHAEL, J.;CLAUBERG, HORST;HELTON, TONY, W.;NELSON, GREGORY, W.;MEADE, RANDY, B.;MOORE, JAMES, E.;OWENS, G., RUSSELL;JACKSON, BARBARA, C.;KRUTAK, JAMES, JOHN |
