METHOD AND APPARATUS FOR WRITING OPTICAL RECORDING MEDIA

摘要

PURPOSE: An apparatus is provided for the confident method for institution an optimum value of recording parameter by the read signal of test pattern recorded on the medium. CONSTITUTION: A method relates to the optical write apparatus recording an information by radical beam and institute the reading parameter of radical beam.. A method is described for setting an optimum write power for recording information on an optical recording medium. A series of test patterns (20', 21', 22') is written on the medium, the test patterns being written with different write powers. The method for writing optical recording media characterizes that the value of writing parameter shapes the symmetrical pattern in a plurality of test pattern The values of the write power in subsequent test patterns form a symmetrical pattern. On reading the test patterns, the modulation of each read signal is determined. An optimum value of the write power is determined from the modulations