Optical study for the absorbing crystal

吸收晶体的光学研究

基本信息

批准号：
13640484
负责人：
TOKONAMI Masayasu
金额：
$ 1.09万
依托单位：
Saitama Institute of Technology (SIT for short)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13640484/
关键词：
abnormal extinction elliptically polarized light amphibole nepheline syenite monochromatic light mercury lamp polarizing microscope Pocos de Caldas ポッソスデカルダス 546μm

项目摘要

Purpose: Reconfirmation of the research of Tokugoro Shoda which clarified the fact that two sorts of the elliptically polarized light propagate in a crystal is intended.Specimen: The rock specimen is a hypabyssal rock (Nepheline syenite) from Taquari, Pocos de Caldas, Minas Gerais, Brazil, which is collected at July 26th 1987 in aid of the Science Grant of the Ministry of Education (62041024). It is lent from Geological Museum, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology. Mineral composition are two sort of amphiboles (Potassic magnesioarfvedsonite and calcic arfvedonite), K-feldspar, Na-feldspar, aegirine, zircon, sphene and pyrite etc. The optical properties of potassic magnesioarfvedsonite is so unique to be elucidated.Construction of an elliptically polarizing microscope: The main body of the newly constructed microscope is the system polarizing microscope BX-P made by OLYMPUS OPTICAL CO., LTD. A mercury lamp (SHL-100UVQ-2, produced … More by Harison Toshiba Lighting Corp. is used as a light source. A narrow band path filter CJ43177 supplied by Edmund Industrial Optics is inserted in the optical path to select a monochromatic light of the 546nm wave length. Two rotatable quarter wave plates are set; the lower one is between the polarizer and the stage and upper one is between the stage and the analyzer. The direction of the lower quarter wave plate is measured from the direction that the vibrating direction of the faster wave in the plate coincide to the direction of the polarizer.Construction of analytical system: A Logitec middle tower personal computer LPC-PTIGBS with the software of Image-Pro Plus by Media Cybernetics is introduced to analyze the image of a CCD camera (SONY CCD-IRIS DXC-108).Observation: One of amphibole crystals shows incomplete extinction under the conventional polarizing microscope. On the case that the lower quarter wave plate is rotated 13 degrees to the anti-clock direction from the zero point and the upper quarter wave plate is hold to the appropriate direction corresponding to the lower, the complete extinction is observed. This means that the elliptically polarized light of the ellipticity of 0.23 can propagate in this crystal.Result: This observation guarantees the validity of the theory proposed by T. Shoda. Less

目的：重新确认tokugoro shoda，这阐明了以下事实：Elipture偏振光晶体的晶体是意图的。Specimen：岩石标本是塔基斯（Taquari 1987年7月26日，教育部科学的帮助（62041024），日本的Olocic underion。，sphene和黄铁矿等。他的光学特性是可以阐明的。照明公司被用作窄带路径滤波器。较低波的方向之间的tage和上方是从板中的波的振动方向来测量的。媒体控制论的图像 - 分析CCD摄像头的图像（Sony CCD-IRIS DXC-108）。从零点和上部的抗锁定方向与下部相对，这意味着压缩意味着El're偏振的光越多。结果：SS