辐射功率 HEXHI=EHs、1 E S==A0e424 32c个Si 当O=时=l 当=0时 0 min·辐射功率 2 0 1 | | | | E c EH  S = E  H = =    sin 32 e 2 2 2 2 4 0 cR A S I  = = 2   = max 当 时 I = I 当  = 0 时 I = I min = 0