Unpolarized light(自然光): the amplitudes of the e vector in all possible directions are equal. 把各个光矢量分解成互相垂 直的两个光矢量分量,且两 个光矢量分量的平均值等 y diagram: 010+o-HO Unpolarized light is viewed as two vertical plane polarized waves with random phase difference. 部分偏振光:X Y Unpolarized light（自然光）: the amplitudes of the E vector in all possible directions are equal. E  diagram： 把各个光矢量分解成互相垂 直的两个光矢量分量，且两 个光矢量分量的平均值等。 Unpolarized light is viewed as two vertical plane￾polarized waves with random phase difference. 部分偏振光: