2双界面上反射光相位关糸 r Att'r'Att'r/3Att'r h Atr 23 Att' Att'r' Attr 4 Att'r1 n h n2 1 n 1 i 2 i A Ar Att r  3 Att r  5 Att r  AtAtr Att 2 Att r  4 Att r  6 Att r  1 2 3 4 1 2 3 4 2.双界面上反射光相位关系