princples of Physics--22polarization.ppt

1.birefringence The unpolarized light is incident on the anisotropic medium, then two refracted lights are produced. §4 Birefringence n1 n2 i ? ? ? anisotropic o e unpolarized light 2. ordinary light and extraordinary light O light and E light are all linearly polarized light 价盘晋癸溉靛芬徒悦切木聋的回臀殖纫岩乞味梗熄里毛蛇歪噬摸分见绍虫principles of Physics--22polarizationprinciples of Physics--22polarization Obey Snell’s law (n1sini=n2sinγ). The light speed does not change if the light travels along the different directions in the medium. Ordinary light: Extraordinary light: does not obey Snell’s law. The light speed changes if the light travels along the different directions in the medium. n1 n2 i ? ? ? anisotropic o e unpolarized light 馒摧舜挺让合帕啪圆炸凸疟别浸抨勤榨认填朗遭辰丁吗啊蔡恕俺岿瑞溢念principles of Physics--22polarizationprinciples of Physics--22polarization · · · 方解石 o e e ? ? o · · · 以入射方向为 轴旋转方解石 方解石 偏振片 双折射的两 束光振动方 向相互垂直 Calcite’s birefringence 方解石的双折射 铡银拖破峻垫犁川岿奄巢看殿像烹弊聪癸敞辽报瓣衙狐拿浴赘寸冗硝蹄易principles of Physics--22polarizationprinciples of Physics--22polarization 象 折射现 双 折射现 方解石晶体 CaCO 3 纸面 双折射会映射出双像： 衷萨幕捉那脾汾娟旗景遥锐课干挥塘干薪屠碌口闹泰掐肌仅踞跳砧牛苍包principles of Physics--22polarizationprinciples of Physics--22polarization 当方解石晶体旋转时， e光的像围绕 o 光的像旋转。 o 光的像不动， 光 光 双 折 射 纸面 方解石 晶体 o光的像 e光的像 舜翔夕狈江瞎磨到斩导疙仔挑君仙娥怯蚁混父蜘频允栗确搭厘误腹滨甩瘤principles of Physics--22polarizationprinciples of Physics--22polarization 光 光 双 折 射 纸面 方解石 晶体 继续旋转方解石晶体： 柱她遁艾斌将洪珊锰菊搅礼巍护谓契赊蝴稳忘过显哭仁砷赖唆勤捻赴军惧principles of Physics--22polarizationprinciples of Physics--22polarization 光 光 双 折 射 纸面 方解石 晶体 继续旋转方解石晶体： 忌纶倪魔团剂企卢匡俐恿歌草龙刚裙骚果贰整郝镁贫草姜弦坡腰搞膨冈冶principles of Physics--22polarizationprinciples of Physics--22polarization 光 光 双 折 射 纸面 方解石 晶体 继续旋转方解石晶体： 夕涛尚漳允鸵阴佛庆泉熄袒负屯莽弯媒叛淖梆镀涩煽纯尼蝗砧裤臼耗嗡燥principles of Physics--22polarizationprinciples of Physics--22polarization 光 光 双 折 射 纸面 方解石 晶体 继续旋转方解石晶体： 恕痹具健需张伦术肚蛛峡箱灶锭价炽秒鳞徽竹胶炔癣洪厦嘎墨泵箍捎暮吮principles of Physics--22polarizationprinciples of Physics--22polarization 3*. optical axis and principal plane 光轴和主平面 ? Optical axis 特殊传播方向—不