作者: Hirohisa Yamada , Takayuki Naka , Hideharu Tajima , Masaki Yamamoto , Masahito Konishi
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摘要: If a first reflection rate is defined as the calculated from quantity of reflected light obtained longest pit (P1max) or space (S1max) in row, and second (P2max) (S2max) row configured so that substantially same rate.