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where a pit is required a beam energy of 20 milliwatts might be suitable, but where a partial explosion leaving a bump is required, a beam energy of 1 milliwatt may be sufficient.
these and other needs are fulfilled by the present invention. summary of the invention basically, the present invention is embodied in an improved recording medium for use with a recording apparatus of the type that directs onto the medium, as the medium is moved in a prescribed fashion, a write beam of light that is modulated in intensity in accordance with a data signal to be recorded.