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题名:
Simultaneous Absorptance and Thermal-Diffusivity Determination of Optical Components with Laser Calorimetry Technique
作者: Wang, Yanru; Li, Bincheng
刊名: INTERNATIONAL JOURNAL OF THERMOPHYSICS
出版日期: 2012-11-01
卷号: 33, 期号:10-11, 页码:2069-2075
关键词: Absorptance ; Laser calorimetry ; Optical components ; Thermal diffusivity
文章类型: Article
英文摘要: The laser calorimetry (LCA) technique is used to determine simultaneously the absorptances and thermal diffusivities of optical components. An accurate temperature model, in which both the finite thermal conductivity and the finite sample size are taken into account, is employed to fit the experimental temperature data measured with an LCA apparatus for a precise determination of the absorptance and thermal diffusivity via a multiparameter fitting procedure. The uniqueness issue of the multiparameter fitting is discussed in detail. Experimentally, highly reflective (HR) samples prepared with electron-beam evaporation on different substrates (BK7, fused silica, and Ge) are measured with LCA. For the HR-coated sample on a fused silica substrate, the absorptance is determined to be 15.4 ppm, which is close to the value of 17.6 ppm, determined with a simplified temperature model recommended in the international standard ISO11551. The thermal diffusivity is simultaneously determined via multiparameter fitting to be approximately 6.63 x 10(-7) m(2) center dot s(-1) with a corresponding square variance of 4.8 x 10(-4). The fitted thermal diffusivity is in reasonably good agreement with the literature value (7.5 x 10(-7) m(2) center dot s (-1)). Good agreement is also obtained for samples with BK7 and Ge substrates.
WOS标题词: Science & Technology ; Physical Sciences ; Technology
类目[WOS]: Thermodynamics ; Chemistry, Physical ; Mechanics ; Physics, Applied
研究领域[WOS]: Thermodynamics ; Chemistry ; Mechanics ; Physics
关键词[WOS]: THIN-FILMS ; CONDUCTIVITY
收录类别: SCI ; ISTP
语种: 英语
WOS记录号: WOS:000312072300044
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/2356
Appears in Collections:光电技术研究所被WoS收录文章_期刊论文

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作者单位: Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Sichuan, Peoples R China

Recommended Citation:
Wang, Yanru,Li, Bincheng. Simultaneous Absorptance and Thermal-Diffusivity Determination of Optical Components with Laser Calorimetry Technique[J]. INTERNATIONAL JOURNAL OF THERMOPHYSICS,2012,33(10-11):2069-2075.
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