"Development of Scanning Laser Micro-polariscope and its Applications for Stress Evaluation"

《扫描激光微偏光镜的研制及其在应力评估中的应用》

• 批准号: 07555034
• 负责人: NIITSU Yasushi
• 金额: $ 3.01万
• 依托单位: Tokyo Denki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555034/
• 关键词: Stress Measurement; Laser Photoelasticity; Nondestructive Evaluation; Experimental Strss Analysis; シリコン単結晶; Stress Measurement; Laser Photoelasticity; Nondestructive Evaluation; Experimental Strss Analysis; シリコン単結晶

We have developed an optical equipment that possesses high detection sensitivity for measuring the small optical retardation induced by small stress by means of laser photoelasticity. A He-Ne laser is used as a light source to measure small stress in transparent materials. We worked on the theory and process of the measurement of optical retardation in the materials. The magnitudes of principal stress difference and the directions of the principal stress are obtained simultaneously and quantitatively using our equipment. To evaluate the validity of the measurement results of the equiment, the stress distribution of a pulled rectangular glass plate with notches at both sides is measured using the equipment. The experimental results of stress distribution agree well with the analytical results of FEM.The stress distribution can be determined quickly by using the equipment and scanning stress distribution measurement has been realized. The features of the developed optical equipment and future applications are as follows,(1)This optical equipment has high resolution power of measurement less than 1 nm retardation and this technology can be applicable to the static and dynamic force evaluations in bio-membrane, bio-cell and several kinds of thin layrs,(2)This method can achieve the spatial-resolution of about 12 micrometer and has possibility of higher spatial-resolution up to 1 micrometer with the lens system like a microscope.

我们已经开发了一种光学设备，该光学设备具有高检测灵敏度，用于测量通过激光光弹引起的小压力引起的小光智能。 He-Ne激光用作测量透明材料中小应力的光源。我们研究了材料中光智障的测量理论和过程。使用我们的设备同时且定量地获得主应力差异的幅度和主应力的方向。为了评估公寓测量结果的有效性，使用设备测量了拉矩形玻璃板的应力分布。应力分布的实验结果与FEM的分析结果非常吻合。可以通过设备快速确定应力分布，并且已经实现了扫描应力分布测量。开发的光学设备和未来应用的特征如下，（1）该光学设备具有高分辨率的高分辨率小于1 nm的延迟，并且该技术可适用于在生物膜，生物细胞，生物细胞中的静态和动态力量评估，并且在较高的薄级别上，（2）该方法可以实现较高的较高的光度，（2）（2）较高的跨度，（2）在1个微米的情况下，（2）可实现12微米。镜头系统像显微镜一样。