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Simultaneous absorptance and thermal-diffusivity determination of optical components with laser calorimetry technique
Wang, Yanru1,2; Li, Bincheng1; Li, B. (bcli@ioe.ac.cn)
Volume33
Pages2069-2075
2012
Language英语
ISSN0195928X
DOI10.1007/s10765-012-1241-x
Indexed ByEi
Subtype会议论文
AbstractThe 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 × 10-7 m 2·s-1 with a corresponding square variance of 4.8 × 10-4. The fitted thermal diffusivity is in reasonably good agreement with the literature value (7.5 × 10-7 m 2·s -1). Good agreement is also obtained for samples with BK7 and Ge substrates. © 2012 Springer Science+Business Media, LLC.; 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 × 10-7 m 2·s-1 with a corresponding square variance of 4.8 × 10-4. The fitted thermal diffusivity is in reasonably good agreement with the literature value (7.5 × 10-7 m 2·s -1). Good agreement is also obtained for samples with BK7 and Ge substrates. © 2012 Springer Science+Business Media, LLC.
Conference NameInternational Journal of Thermophysics
Conference Date2012
Citation statistics
Document Type会议论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/7856
Collection薄膜光学技术研究室(十一室)
Corresponding AuthorLi, B. (bcli@ioe.ac.cn)
Affiliation1. Institute of Optics and Electronics, Chinese Academy of Sciences, P.O. Box 350, Shuangliu, Chengdu 610209 Sichuan, China
2. Metrology and Testing Center, China Academy of Engineering Physics, Mianyang 621900, China
Recommended Citation
GB/T 7714
Wang, Yanru,Li, Bincheng,Li, B. . Simultaneous absorptance and thermal-diffusivity determination of optical components with laser calorimetry technique[C],2012:2069-2075.
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