Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Measurement System of Bidirectional Reflectance-distribution Function

양방향 반사율 분포함수 측정시스템

  • Hwang, Ji-Soo (Center for Temperature & Light, Division of Physical Metrology, Korea Research Institute of Standards and Science)
  • 황지수 (한국표준과학연구원 기반표준본부 온도광도센터)
  • Received : 2010.02.24
  • Accepted : 2010.04.12
  • Published : 2010.04.25
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Abstract

A theory of bidirectional reflectance-distribution function (BRDF), a newly developed BRDF measurement system, and a method for evaluating the uncertainty of BRDF measurements are presented. The BRDF measurement system which measures BRDF in a wavelength range of (380~1500) nm with an angle range of $(-75{\sim}75)^{\circ}$ was installed. The measurement uncertainties, consisting of correlated terms and uncorrelated terms, were evaluated for the BRDF measurement system, resulting in the relative expanded uncertainty less than 3% (k=2).

본 논문에서는 양방향 반사율 분포함수의 이론과 제작된 측정시스템 및 측정불확도의 평가방법을 소개한다. (380~1500) nm의 분광 양방향 반사율 분포함수를 $(-75{\sim}75)^{\circ}$의 각도 범위에서 측정할 수 있는 측정시스템을 제작하였고, 상관관계가 있는 불확도 성분과 상관관계가 없는 불확도 성분으로 나누어 측정불확도를 평가하였다. 평가 결과, 제작된 양방향 반사율 분포함수 측정시스템의 상대확장불확도는 3% (k=2) 이하로 평가되었다.

Keywords

References

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