Observation of 3-D birefringence distribution of polymer thin film by near-field optical microscope

被引：4

作者：

Qin, J. ^{[1
]}

Nagai, H. ^{[1
]}

Numata, T. ^{[1
]}

Otani, Y. ^{[1
]}

Umeda, N. ^{[1
]}

机构：

[1] Tokyo Univ Agr & Technol, Koganei, Tokyo 1848588, Japan

来源：

4th International Symposium on Instrumentation Science and Technology (ISIST' 2006) | 2006年 / 48卷

关键词：

D O I：

10.1088/1742-6596/48/1/175

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

According to development of optical engineering, the measurement accuracy of optical components and materials has become more important. For example, birefringence in polymer thin film is an essential issue for development of liquid crystal display. In this study, after a PVA (poly vinyl alcohol) film was embedded by photopolymer and cut by ultramicrotome, a cross-sectional birefringence distribution of cut film was observed by birefringence contrast scanning near-field optical microscopy (B-SNOM). As a result, three dimensional birefringence ratios were calculated and birefringence of parallel to stretching direction was larger than that of vertical one. This result shows that cross-sectional birefringence distribution is yielded by inhomogencous distribution of molecular alignment in film material according to asymmetry stretching.

引用

页码：926 / 931

页数：6