共查询到13条相似文献,搜索用时 125 毫秒
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利用菲涅耳双镜测金属线膨胀系数 总被引:2,自引:0,他引:2
分析了菲涅耳双镜在干涉实验中 ,由金属受热膨胀引起的光源位置变化对干涉条纹的影响 ,导出金属受热时绝对伸长量与干涉条纹位置变化之间的关系 ,并通过它对黄铜棒的线膨胀系数进行测量。 相似文献
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劈尖干涉中斜干涉条纹的测量王雪冬,王红理,刘平(西安交通大学物理系710049)在等厚于涉实验中,所使用的劈尖干涉装置是由两块平面国玻璃板或长方形平面玻璃板中间夹一全属箔条,同时为了固定金属箔条及防止平面玻璃的脱落而损坏,用螺旬将其固紧在胶木圈内.根... 相似文献
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劈尖干涉条纹定域的解析研究 总被引:3,自引:2,他引:1
得到了劈尖干涉定域中心参量方程和定域深度的解析解,解析地讨论了定域中心和定域深度与入射角、劈尖角、相对折射率、光源位置等物理量的依赖关系.研究的结果对确定清晰的劈尖干涉条纹位置具有指导意义. 相似文献
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The intensity distribution of pointolite interference fringes and its characters are discussed by the theory of interference on the condition of glass plate thickness being non-uniform. A novel method of measuring wedge angle of plate is deduced and improved by selecting appropriate reflectivity (R). So, the glass plate with appropriate reflectivity should be adopted to improve the measurement precision for R has a much effect on fringes. The experiments and analysis show it is suitable that R is less than 0.5. By using the equations deduced, the wedge angle was measured and its value is 3.7 ÿ 10?4. 相似文献
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J.?K?dzierski Z.?Raszewski M.?A.?Kojdecki E.?Kruszelnicki-Nowinowski P.?Perkowski W.?Piecek E.?Miszczyk J.?Zieliński P.?Morawiak K.?Ogrodnik 《Opto-Electronics Review》2010,18(2):214-218
A new accurate and fast interference method for determining ordinary and extraordinary refractive indices of nematic liquid
crystals is presented and discussed. The method relies on microscopic measurements of distances between interference fringes
appearing in polarised parallel coherent monochromatic light beam transmitted normally to the surfaces through a wedge cell
filled with a nematic. Both glass plates confining the cell are coated with a partly transparent thin film of metal which
is deposited by evaporation in vacuum. Owing to the multiple reflections between the surfaces and a small edge angle, the
interference fringes observed near the wedge apex edge are sharp and equidistant. To apply this method one needs only small
amount of an investigated liquid crystal. Basic mathematical formulae and results of an experiment are briefly discussed. 相似文献
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提出了使用用迈克尔逊干涉仪,改变光源入射方式及观测方式以获得稳定、清晰等厚干涉现象的方法.探究了在光路中插入的被测透明介质如何对等厚干涉条纹产生影响,并导出了被测介质厚度、折射率及旋转角度与等厚干涉条纹移动量之间的关系.实现对透明介质厚度、折射率进行简练、快速的同时测量. 相似文献