| 摘要 |
A copy controlled information recording disk 3 having a session structure that is composed of a first lead-in area 2a1, a first program area 2b1, a first lead-out area2c1, a second lead-in area 2a2, a second program area 2b2, and a second lead-out area 2c2. They are formed continuously in serial concentric circle in the radial direction. The copy controlled information recording disk 3 is characterized in that each reflection coefficient of the first and second lead-in areas 2a1, 2a2 and the first and second lead-out areas 2c1, 2c2 is set to be equal to a reflection coefficient of the first and second program areas 2b1, 2b2, and that the reflection coefficient is set to be in a value that physical positions of each area is hard to be distinguished visually.
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