Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
권호 표지
DOI QR코드

DOI QR Code

Improvement of Spatial Radiance Uniformity of Small Integrating Spheres

소형 적분구의 공간 복사 휘도 균일도 향상 연구

  • Yong Shim Yoo (Division of Physical Metrology, Korea Research Institute of Standards and Science) ;
  • Dong Joo Shin (Division of Physical Metrology, Korea Research Institute of Standards and Science) ;
  • Bong Hak Kim (Division of Physical Metrology, Korea Research Institute of Standards and Science)
  • 유용심 (한국표준과학연구원 물리표준본부) ;
  • 신동주 (한국표준과학연구원 물리표준본부) ;
  • 김봉학 (한국표준과학연구원 물리표준본부)
  • Received : 2023.07.05
  • Accepted : 2023.08.05
  • Published : 2023.10.25
Download PDF
⟨ Previous Next ⟩

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.

절대복사온도계의 분광 복사 휘도 감응도를 교정하기 위해 압축된 polytetrafluoroethylene (PTFE)과 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.

Keywords

Acknowledgement

한국표준과학연구원 국제 단위계(SI) 재정의 선도 차세대 측정 표준 연구 과제 지원(Grant No. KRISS-2023-GP2023-0001).

References

  1. H. W. Yoon, C. E. Gibson, G. P. Eppeldauer, A. W. Smith, S. W. Brown, and K. R. Lykke, "Thermodynamic radiation thermometry using radiometers calibrated for radiance responsivity," Int. J. Thermophys. 32, 2217-2229 (2011). https://doi.org/10.1007/s10765-011-1056-1
  2. K. Anhalt, A. Zelenjuk, D. R. Taubert, T. Keawprasert, and J. Hartmann, "New PTB setup for the absolute calibration of the spectral responsivity of radiation thermometers," Int. J. Thermophys. 30, 192-202 (2009). https://doi.org/10.1007/s10765-008-0480-3
  3. T. Keawprasert, K. Anhalt, D. Taubert, and J. Hartmann, "Monochromator-based absolute calibration of radiation thermometers," Int. J. Thermophys. 32, 1697-1706 (2011). https://doi.org/10.1007/s10765-011-1031-x
  4. Y. Yamaguchi, Y. Yamada, and J. Ishii, "New setup for the absolute spectral responsivity of radiation thermometers with a supercontinuum source," in Proc. XX IMEKO World Congress Metrology for Green Growth (Busan, Korea, Sep. 9-14, 2012).
  5. Y. Yamaguchi, Y. Yamada, and J. Ishii, "Supercontinuum-source-based facility for absolute calibration of radiation thermometers," Int. J. Thermophys. 36, 1825-1833 (2015). https://doi.org/10.1007/s10765-015-1918-z
  6. P. Y. Barnes, E. A. Early, and A. C. Parr, "Diffuse reflectance of sintered and pressed polytetrafluoroethylene (PTFE)," Proc. SPIE 3426, 190-194 (1998). https://doi.org/10.1117/12.328454
  7. D.-J. Shin, D.-H. Lee, G.-R. Jeong, Y.-J. Cho, S.-N. Park, and I.-W. Lee, "Nonlinearity measurement of UV detectors using light emitting diodes in an integrating sphere," in Proc. 9th International Conference on New Developments and Applications in Optical Radiometry (Davos, Switzerland, Oct. 17-19, 2005), pp. 77-78.
  8. Y. S. Yoo, G. J. Kim, S. Park, D.-H. Lee, and B.-H. Kim, "Spectral responsivity calibration of the reference radiation thermometer at KRISS by using a super-continuum laser-based high-accuracy monochromatic source," Metrologia 53, 1354-1364 (2016). https://doi.org/10.1088/0026-1394/53/6/1354