鑑別におけるレーザー・トモグラフィの有効性 : コランダム : 新しい鑑別法

概要

論文の詳細を見る
Recently, it becomes very important to observe crystal defects for identification of gemstones. X-ray topography, X-ray diffraction and so on have been known as methods to detect crystal defect, but damage by X-ray irradiation is a problem for gemstones. However, laser tomography is a powerful method fitting for crystal defects in gemstones under low magnification and without damage. Moriya and Ogawa (1983) developed this equipment and it is a method to take the tomograph of a transparent object by scanning a narrow laser beam into the sample. It is able to obtain not only a scattering image but also a fluorescence image. We are able to obtain information of crystal defects, such as distribution of impurities, growth sector,dislocation and so on, from images on the laser tomograph. The author describes various features that were observed in natural, synthetic and treated corundum with laser tomography.
宝石学会(日本)の論文
1999-12-31