OPTICAL DATA MEDIUM CONTAINING, IN THE INFORMATION LAYER, A DYE AS A LIGHTABSORBING COMPOUND AND HAVING A PROTECTIVE COVERING LAYER OF PREDETERMINED THICKNESS
申请人:Bayer Chemicals AG
公开号:EP1377975A2
公开(公告)日:2004-01-07
[EN] OPTICAL DATA MEDIUM CONTAINING, IN THE INFORMATION LAYER, A DYE AS A LIGHT-ABSORBING COMPOUND<br/>[FR] SUPPORT D'INFORMATION OPTIQUE CONTENANT, DANS LA COUCHE D'INFORMATION, UN COLORANT EN TANT QUE COMPOSE D'ABSORPTION DE LUMIERE
申请人:BAYER AG
公开号:WO2002080150A2
公开(公告)日:2002-10-10
Optical data medium containing a preferably transparent substrate which is optionally already coated with one or more barrier layers and on the surface of which an information layer which can be recorded on using light, optionally one or more barrier layers, and a cover layer, have been applied, which data medium can be recorded on and read using focused blue light through the cover layer on the information layer, preferably laser light with the wavelength between 360 nm and 460 nm, the information layer containing a light-absorbing compound and optionally a binder, characterized in that at least one dye is used as the light-absorbing compound wherein the cover layer on the top of the information layer including the adhesive layer do have a total thickness of 10 µm to 177 µm and the numerical aperture NA of the focusing objective lens setup is greater or equal 0.8.