| 关于利用激光光束偏转法测量热扩散率的研究 |
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| 引用本文： | 邢进华,陈金星,周军.关于利用激光光束偏转法测量热扩散率的研究[J].光子学报,2002,31(8):1037-1040. |
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| 作者姓名： | 邢进华 陈金星 周军 |
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| 作者单位： | 1. 常熟高等专科学校物理系,常熟,215500
2. 中国科学院上海光学精密机械研究所,上海,201800 |
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| 摘 要： | 本文介绍了激光光束偏转法测量材料热扩散率的原理,从理论上分析了光的粒子性和光的衍射限制了该方法对热扩散率的测量精度,指出了提高测量精度的关键在于提高信号对光束偏转的灵敏度为此给出了一种带有Ronchi光栅的迈克耳孙干涉仪的探测装置,从而使灵敏度提高了约5.3倍.
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| 关 键 词： | 热扩散率 灵敏度 散粒噪音 |
| 收稿时间： | 2001/12/17 |
| 修稿时间： | 2001年12月17 |
MEASURING THERMAL DIFFUSIVITY OF SOLID MATERIALS BY LASER OPTICAL BEAM DEFLECTION METHOD |
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| Xing Jinhua ,Chen Jinxing ,Zhou Jun.MEASURING THERMAL DIFFUSIVITY OF SOLID MATERIALS BY LASER OPTICAL BEAM DEFLECTION METHOD[J].Acta Photonica Sinica,2002,31(8):1037-1040. |
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| Authors: | Xing Jinhua Chen Jinxing Zhou Jun |
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| Institution: | Xing Jinhua 1,Chen Jinxing 1,Zhou Jun 2 1 Department of Physics,Changshu College,Changshu 215500 2 Shanghai Institute of Optics & Fine Mechanics,Shanghai 201800 |
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| Abstract: | The measurement principle of thermal diffusivity of material by laser optical beam deflection method(OBDM)is described. Due to the particle of light and the diffraction of light,some limits of the prectision are analyzed theoretically for measuring thermal deffusivity by OBDM in this paper.For increasing the measurement precision,the key is to increase the sensitivity for optical beam deflection.A Michelson interferometer with a Ronchi grating as the detecton scheme has been implemented.In this case,the amplification in sensitivity was approximately 3.5 times. |
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| Keywords: | Thermal diffusivity Sensitivity Shot noise |
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