Method and means for changing pit depth on an optical recordable medium

摘要

Method and apparatus for improving the characteristics of the surface effects on a replicated optical disc (1), the master for which is recorded on an optical recording apparatus which includes a writing light beam source (7) and an optical modulator (11) for modulating the intensity of the writing beam of light above and below a threshold level of a relatively moving recording medium response to a modulator drive signal (10) for recording information on the medium, the light beam being capable of forming a track of surface effects or indicia in the relatively moving master recording medium when the writing beam is above threshold and incapable of forming surface effects in the relatively moving recording medium when the writing beam is below threshold.