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    • 47. 发明授权
    • Birefringence-free plastics
    • 双折射塑料
    • US4544583A
    • 1985-10-01
    • US536411
    • 1983-09-27
    • Uwe ClaussenHellmut HannesHans-Leo Weber
    • Uwe ClaussenHellmut HannesHans-Leo Weber
    • G02B5/30G02F1/1333
    • G02B5/3083G02F1/133305Y10S428/913Y10T428/1059Y10T428/1086Y10T428/24942Y10T428/2495Y10T428/31507
    • Birefringence-free arrangement of plastic foils, characterized in that two plastic foils having a single principal optical axis, said optical axis lying within the plane of the plastic foil, are arranged parallel behind each other so that the optical axes of both plastic foils are forming an angle of 90.degree..+-.7.degree. and the material of the foils with regard to its optical properties and the thickness of the foils being selected in such a manner that the optical path differences .DELTA.n.sub.1 D.sub.1 for the light waves which are associated with the two main refraction indices within the first plastic foil is approximately equal to the optical path difference .DELTA.n.sub.2 d.sub.2 of the second plastic foil, .DELTA.n.sub.1, .DELTA.n.sub.2, being the difference of the main refraction indices in the first and second foil, respectively, and d.sub.1, d.sub.2 standing for their thicknesses, and the use of said arrangement in components and devices in which polarized light is used, especially in liquid crystal displays.
    • 塑料箔的双折射布置,其特征在于,具有单个主光轴的两个塑料箔,所述光轴位于塑料箔的平面内,彼此平行地布置,使得两个塑料箔的光轴正在形成 角度为90度+/- 7度,并且箔的材料关于其光学性质和箔的厚度以这样的方式选择,使得与...相关联的光波的光程差DELTA n1D1 第一塑料箔内的两个主折射率近似等于第二塑料箔的光程差DELTA n2d2,分别为第一和第二箔中的主折射率的差值,ΔDTAn1,DELTA n2,d1 ,d2表示其厚度,以及在使用偏振光的部件和装置中使用所述装置,特别是在液晶显示器中。