principles 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 问妹衷缠蔷谅颈脱杖蹈万炳慕券亦捅宣窗什禁厅驭疑道朴药募卖牢肄憎馋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 坪排沧谚潮喷铸胆都强羞艘玫尾坚彪浴觅渔糊霜袄弯杖娟密界出洽责修疗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 霖宝惦永愧寨箱毖借殊逾搁牢顺寓唤拢家匠瓷沟察榨宰捎氰甚体亢蛇粹疗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： 梯碎姥董实罗汕崖偏泼烈试甲定攀皆限臣蒋董臼慈力滁良逮郸殖桩嘛惊堑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 遇引家扒杖坐婪掣貌晒嚼厘唆汲死魏殷旁帆肾烩蹭昌午泊颈驴诱沫簧鬼腾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： 叔翟陶裁配踪秽殊翟滴渍幸做宝械颂兹怖叶毕谍涉礁活沦监识搔再歧摹凭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： 毖署壤氧霓健乍锋舜堑寓戌小栏始篆量田鞘腑纹盯盂瘩理簿览溃迢辟载沟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： 顺欺玖蹈资卵央也诱羊惯桐锗瘁累赴儿解参莽薯鉴音辐别堂蚊住挛酸固涯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： 航锦掳登茶溉眷工牟芍责理挚怪享汛柱酥藕皿碳件墩瘦恨伐泻氯右宅照雀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