소형 적분구의 공간 복사 휘도 균일도 향상 연구
Improvement of Spatial Radiance Uniformity of Small Integrating Spheres
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초록
절대복사온도계의 분광 복사 휘도 감응도를 교정하기 위해 압축된 polytetrafluoroethylene (PTFE)와 반사봉을 사용하여 높은 공간 복사 휘도 분포를 가진 KRISS형 소형 적분구를 제작하였다. 이 적분구의 공간 복사 휘도 균일도는 ±0.009%로 지금까지 국외 표준기관들이 보고한 최고값보다 5배 높았다. 또한, 상용 제품인 소결된 PTFE 적분구의 공간 복사 휘도 균일도를 10배 향상시켰다.
Abstract
A KRISS-type small integrating sphere with a high spatial radiance uniformity was made using pressed polytetrafluoroethylene (PTFE) and a reflective rod to calibrate the spectral radiance responsivity of absolute radiant thermometers. The spatial radiance uniformity of the KRISS-type small integrating sphere was ±0.009%, five times higher than the best value reported by foreign national metrology institutions thus far. In addition,we improved the spatial radiance uniformity of a commercial sintered PTFE integrating sphere by a factor of 10.
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