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Development of Polarizer Using Anisotropic Light Scattering in Polymer

利用聚合物中各向异性光散射开发偏光片

基本信息

批准号：
12555003
负责人：
TOKITA Masatoshi
金额：
$ 8.38万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12555003/
关键词：
Polymer Polymer blends Polarizer Light scattering Polycarbonate Birefringence Fiber

项目摘要

We demonstrate optical characteristics of polymeric linear polarizers produced from oriented two-component amorphous polymer blends. Refractive index of dispersed phase of blend is closely to ordinary refractive index of birefringent continuous phase, while refractive index mismatch is simultaneously generated in the perpendicular direction. Films are therefore transparent or opaque depending on the polarization direction of the incident light.However, both transmittance and polarizing efficiency measured by UV-VIS spectra depends on incident wavelength, which is ascribed to wavelength dependence of light scattering by small particles. To eliminate this character, we tried to increase length of dispersed phase to drawing direction. By changing dispersed phase contents, we could control particle (dispersed phase) size to the perpendicular direction, but could not increase particle size to the drawing direction.So we introduce aligned fibers in polymer matrix instead of dispersed phase, … More which increase particle size to the refractive index mismatch direction. Both transmittance and polarizing efficiency were drastically improved.It was found that the sum of the light intensities in the forward and backward direction approaches unity, which indicates that light losses due to, for instance, absorption are virtually eliminated. In the opaque state, a large portion of the incident light (80 %) is scattered in the backward direction, whereas in the transparent state 90 % of the incident light is transmitted in the forward direction. This feature is especially useful in devices that are constructed to recycle light and that are designed to enhance the efficiency to produce polarized light from natural light.Apart from a high efficiency to produce linearly polarized light, the polarizers possess a variety of other potential advantages. In comparison to dichroic polarizers, an enhanced temperature and humidity resistance and an enhanced light stability are expected, which are useful properties in, for instance, projection displays, projection screens, and displays in automotive dashboards. Less

我们展示了聚合物线性偏振器的光学特性，从定向的两组分无定形聚合物共混物生产。共混物分散相的折射率接近于双折射连续相的寻常折射率，同时在垂直方向上产生折射率失配。因此，薄膜的透光性和不透光性取决于入射光的偏振方向，而紫外-可见光谱测量的透射率和偏振效率都依赖于入射波长，这归因于小颗粒对光散射的波长依赖性。为了消除这一特性，我们试图增加分散相的长度拉伸方向。通过改变分散相含量，可以控制颗粒（分散相）在垂直方向的尺寸，但不能增加拉伸方向的尺寸，因此在聚合物基体中引入定向纤维代替分散相， ...更多信息这增加了折射率失配方向的颗粒尺寸。透射率和偏振效率都得到了极大的提高。发现前向和后向的光强之和接近于1，这表明由于吸收等原因造成的光损失实际上被消除了。在不透明状态下，入射光的大部分（80%）在向后的方向上散射，而在透明状态下，入射光的90%在向前的方向上透射。这一特性在光回收装置中特别有用，并且可以提高从自然光产生偏振光的效率。除了能高效地产生线偏振光外，偏振片还具有其他潜在的优点。与二向色偏振器相比，期望增强的耐温性和耐湿度性以及增强的光稳定性，这在例如投影显示器、投影屏幕和汽车仪表板中的显示器中是有用的性质。少