Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Delayed Luminescence Characteristics of Human Hands

사람 손의 지연발광 특성

  • 양준모 (서울대학교 물리학부 한의학물리 연구실) ;
  • 최준호 (서울대학교 물리학부 한의학물리 연구실) ;
  • 소광섭 (서울대학교 물리학부 한의학물리 연구실) ;
  • 임우택 (한국과학영재학교) ;
  • 이한상 (한국과학영재학교) ;
  • 채승병 (한국과학영재학교) ;
  • 윤세열 (한국과학영재학교) ;
  • 이경일 (한국과학영재학교) ;
  • 신은석 (한국과학영재학교) ;
  • 최선미 (한국한의학연구원 의료연구부)
  • Published : 2006.02.01
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Abstract

Delayed luminescence from human hands after illumination by light at different wavelength bands was studied. A delayed luminescence measurement system equipped with photomultiplier tube (PMT), fiber optics and automatic mechanical shutter system was developed. Three spectrum band-pass filters, fer which transmissions are on 350${\~}$450 nm, 450${\~}$550 nm and 550${\~}$650 nm, were used to select irradiation wavelength, and 150W metal-halide lamp was used as an illumination source. Six volunteers put their palms (dorsa) onto the measurement system, and after light illumination, delayed luminescence were measured for 10 minutes. The results show that delayed luminescence after shorter wavelength illumination was higher than that a(ter longer wavelength one. These results indicate the existence of accepters in human skin which can be excited at short wavelengths. Furthermore, each subjects showed different delayed luminescence curve patterns. Reactive oxygen species (ROS) are known to have important roles on delayed luminescence, and this research suggests that ROS concentration can be measured noninvasively with optical methods.

6명 피험자의 손바닥과 손등의 일정 영역에 대해 광조사 시간과 파장을 변인으로 하여 빛을 조사한 후 되방출 되는 지연발광을 PMT를 검출기로 한 지연발광 검출장치를 이용하여 시간영역(time domain) 상에서 측정하였다. 광조사 시간을 바꾸어가며 지연발광 특성을 조사한 결과 광조사 시간에는 뚜렷한 의존성을 찾을 수 없었으나 각 피험자마다 지연발광의 세기, 지속시간 등에 있어서 다른 감쇄 특성을 보였다. 그리고 조사광의 파장(색깔)을 350${\~}$450 nm, 450${\~}$550 nm, 550${\~}$650 nm 세 영역으로 나누어 측정한 결과 350${\~}$450 nm영역에서는 강한 지연발광을 보였으나 나머지 영역에서의 지연발광은 상대적으로 미약함을 알 수 있었다. 사람 피부에서의 지연발광 현상은 피험자의 피부조직의 생리상태(활성산소의 농도)와 밀접한 관련이 있을 것으로 예상되며 인체피부 조직의 생리상태를 비침습적으로 진단할 수 있는 새로운 방법이 될 수 있음을 시사한다.

Keywords

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