Large-area perfect blackbody sheets having aperiodic array of surface micro-cavities for high-precision thermal imager calibration
Large-area perfect blackbody sheets having aperiodic array of surface micro-cavities for high-precision thermal imager calibration
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DOI：
10.1364/oe.397136
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发表时间：
2020-07-20
期刊：
影响因子：
3.8
通讯作者：
Amemiya, Kuniaki
中科院分区：
文献类型：
--
作者：
Shimizu, Yuhei;Koshikawa, Hiroshi;Amemiya, Kuniaki
提出了一种大面积完美黑体片，为高精度热像仪标定提供了平面标准辐射体。具有纳米精度表面微腔结构的聚二甲基硅氧烷（PDMS）片材在热红外波段具有超低反射率（接近于单位的超高发射率）和高机械接触耐久性。通过对锥形微腔的几何参数，即半径和宽高比（高度与半径之比）的研究，证实了微腔半径为6 μ m、宽高比为4的PDMS黑体片在热红外波长（6-15 μ m）处的最佳半球面反射率小于0.002（发射率大于0.998）。此外，100 mm × 80 mm的大面积PDMS黑体片保持了良好的面内发射率均匀性。这种前所未有的大面积完美黑体符合国际电工委员会（IEC）关于热成像仪校准的标准推荐，用于发热筛查的发射率性能。(C) 2020年美国光学学会根据OSA开放获取出版协议的条款
We present a large-area perfect blackbody sheet, which would offer a planar standard radiator for high-precision thermal imager calibration. Polydimethylsiloxane (PDMS) sheets with nano-precision surface micro-cavity structures achieve both ultra-low reflectance (ultra-high emissivity close to unity) over the thermal infrared wavelengths and high durability to mechanical contact. The investigation on the geometrical parameters of the conical micro-cavities, that is, radii and aspect ratios (ratio of height to radius), confirmed that the PDMS blackbody sheet with a micro-cavity radius of similar to 6 mu m and an aspect ratio of similar to 4 exhibits the optimum hemispherical reflectance of less than 0.002 (emissivity of higher than 0.998) at the thermal infrared wavelengths (6-15 mu m). Furthermore, the large-area PDMS blackbody sheet of 100 mm x 80 mm maintained an excellent in-plane uniformity of the emissivity. This unprecedented large-area perfect blackbody conforms to the International Electrotechnical Commission (IEC) standard recommendation regarding thermal imager calibration for fever screening in terms of the emissivity performance. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement