Equation Icon  gw opticalpath ' [ '] s1 = s1 + s1 + D3p 2- p1 + n0 -2^n3 .d1 + ^n3 .D1 + n^3 .D3D 2 , (11) ' ( ' ') t1 = p1 - p1 - 2n0 ^n2 . d1 - D 1 + m1. [ ] (12) s' = s'gw+ s'opticalpath + D p - p'+ n 2^n .d' - ^n .D' - ^n .D D , (13) 1 1 1 ( 2 3 ) 1 0 2 1 2 1 2 2 3 t1'= p1 - p'1 + 2n0 ^n3 . d1 - D1 + m1. (14)