Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Exposure-Limit Distance as a Safety-Indicating Parameter of a High-Intensity Flash Source

고광도 섬광의 안전지표로서 노출제한거리

  • 박승만 (호서대학교 나노바이오트로닉스학과) ;
  • 김상욱 (호서대학교 나노바이오트로닉스학과)
  • Received : 2016.10.27
  • Accepted : 2017.01.10
  • Published : 2017.02.25
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Abstract

A systematic understanding of the effects of high-intensity flash sources on the human eye is strongly needed, not only for proper use of the sources, but for human eye health. In this study, the exposure-limit distance (ELD), indicating the minimal safe distance in case of seeing by chance a high-intensity flash, is proposed. The optical procedures to determine the ELD of a high-intensity flash are clarified, and the dependence of ELD on its parameters such as luminous intensity, duration, and radius of a flash are thoroughly investigated. From this investigation it is obvious that, while being weakly dependent on duration, the ELD is nearly proportional to the luminous intensity and the radius of a flash. The proposed ELD as an intuitive safety-indicating parameter is more useful and intuitive than the other characteristic parameters of a high-intensity flash. The ELD is expected to be an essential parameter as a safety indicator, to characterize the performance of a high-intensity flash and to promote the safety of the human eye.

고광도 섬광에 의하여 사람 눈에 미치는 영향을 체계적으로 이해하는 것은 고섬광의 사용상에나 눈의 보건의학적인 관점에서 큰 가치가 있다. 본 논문에서는 고섬광의 안전지표로서 노출제한거리를 제안하고, 섬광의 특성으로부터 노출제한 노출제한거리를 구하는 방법을 제시한다. 본 연구에서 고려한 고섬광에 대한 노출제한을 결정하는 요인은 망막에서 투영되는 열적 에너지이며 이는 망막의 열적위험을 나타내는 열적유효복사휘도로 표현된다. 고섬광의 노출제한거리는 열적 유효복사휘도 또는 광도와 광원 반경에 거의 비례하나 지속시간에는 거의 의존하지 않는다. 고섬광의 노출제한거리가 지속시간에 비례하지 않는다는 점은 눈에 미치는 영향이 노출되는 시간에 비례할 것이라는 기대와는 다른 중요한 발견으로 생각된다. 본 연구에서 제안된 노출제한거리는 고섬광의 연구개발과 활용에서 뿐만 아니라 눈을 보호하는 보건의학 분야에서도 안전지표로서 중요하게 활용될 것으로 기대된다.

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