How refractive index is related to transmittance in infrared region researchgate?
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ABSTRACT
The optical and vibrational properties of BaTi2O5 glass prepared by containerless processing were investigated. The refractive index was 2.15 and the Abbe number was 21.5, as measured by the focal method. The glass was transparent from 340 nm to 7.7 μm. From the Raman scattering spectrum, the maximum phonon energy was found to be 829 cm−1. Using these data, fundamental optical parameters such as the optical basicity, the average oscillator strength, and the optical band gap were estimated. These parameters suggest that BaTi2O5 glass is an attractive material with many potential applications such as lenses, windows, nonlinear optics, and phosphors; moreover, these parameters can guide future development of new titanate glass compositions with superior optical properties.
ACKNOWLEDGMENTS
The authors thank Dr. S. Kittaka of Nippon Sheet Glass Co., Ltd. for designing the refractive index measurement system. Thanks are also due to Professor K. Kimura and Mr. T. Yoshida for the measurement of the density. This study was supported in part by the Nippon Sheet Glass Foundation, Iketani Science and Technology Foundation, Tokuyama Science Foundation, and Grants-in-Aid for Young Scientists (B) (Grant No. 19750174) and for Scientific Research (C) (Grant No. 21550185) from the Ministry of Education, Culture, Sports, Science and Technology of Japan.