| 摘要 |
A WRITABLE OPTICAL RECORD CARRIER (100) COMPRISING A PLURALITY OF RECORDING LAYERS LO, . . . , LN- 1 SEPARATED BY A SPACER MATERIAL, EACH RECORDING LAYER COMPRISING AN OPTIMUM POWER CALIBRATION AREA (101,111,121,131) HAVING A FIRST PORTION (102,112,122) WITH AN AVERAGE REFLECTION VALUE REPRESENTATIVE OF A RECORDED LAYER AND A SECOND PORTION (113,123,133) WITH AN AVERAGE REFLECTION VALUE REPRESENTATIVE OF AN UNRECORDED LAYER, A METHOD, AND AN APPARATUS FOR FORMING OPTIMUM POWER CALIBRATION AREAS ON SUCH A WRITABLE OPTICAL RECORD CARRIER ARE PRESENTED. THE OPTIMUM POWER CALIBRATION AREAS PARTIALLY OVERLAP SUCH THAT THE OPTIMUM POWER CALIBRATION AREAS OF EACH PAIR OF CONSECUTIVE RECORDING LAYERS FORM A STEP, AND THE FIRST PORTIONS OF SAID PLURALITY OF RECORDING LAYERS HAVE THE FORM OF A STAIRCASE. EACH STEP FORMED BY A PAIR OF CONSECUTIVE RECORDING LAYERS K, K+ 1 HAS A PREFERRED MINIMUM STEP SIZE.
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