Abstract
A mechanical model for determining water absorption and transient tilt of a polymeric optical disk is established. Experimental data on disks fabricated from different substrate materials are in quantitative agreement with the model predictions. Consequences of transient tilt for the readout signals of future high density optical data storage media are discussed. Modified polycarbonates with reduced water absorption can make transient tilt less critical for the readout signal. This holds true especially in the case of future high-density optical data storage media.