LED 청색광 분석을 통한 청색광 차단렌즈의 성능 최적화 = Performance Optimization of Blue-light Blocking Lens Through Analysis of Blue Light Emitted from LED Light Sources

다국어 초록 (Multilingual Abstract)

Purpose: We have suggested the way to improve performance of blue-light blocking lens through the analysis of blue light emitted from LED light sources and compared the performance of blue-light blocking lenses commercially distributed in domestic market. Methods: A total of 17 blue-light blocking lenses and a total of 41 LED light sources were used in the study. The light spectral distributions of LED light sources were measured using illuminance spectrometer. The blue-light distribution of each LED light source was calculated from the product of blue-light hazard function and the light spectral distribution of LED light source. The peak wavelength and the full width of half maximum of the blue-light distribution of each LED light source were calculated using the Gaussian curve fitting.
Results: The blue-light distributions of all light sources could be well fitted to the Gaussian curve. The hazard induced by the blue light of LED light sources was found to be averagely the greatest at the wavelength of 450 nm. However, the reflectance of domestic and foreign blue-light blocking lenses was found to be averagely the greatest at 431 nm and 448 nm, respectively. Conclusions: It is necessary to design the blue-light blocking using Gauss fit curve with the peak wavelength of 450 nm and the full width of half maximum of 27 nm in order to block the blue light emitted from LED light sources optimally. In this respect, it may be better to change design of the blue-light blocking for some of blue-light blocking lenes.

국문 초록 (Abstract)

목적: LED 광원의 청색광을 분석하여 청색광 차단렌즈의 성능을 향상시킬 수 있는 방법을 제시하고, 이를 바탕으로 시중에서 유통되고 있는 청색광 차단렌즈에 대한 성능을 비교하였다. 방법: 17종의 청색광 차단렌즈와 41종의LED 광원이 사용되었다. 분광조도계를 이용하여 LED 광원의 분광분포를 구하고, 청색광 위험함수를 가중하여 LED 광원의 청색광 분포를 구한 후, 가우스 곡선으로 맞춤하여 각 LED 광원에 대한 피크파장과 선폭을 구하였다. 결과: LED 광원에서 방출되는 청색광의 분포는 가우스 곡선으로 잘 맞춤되었다. LED 광원의 청색광으로 인한 위험도는 450 nm에서 가장 큰 것으로 나타났다. 하지만 국내 및 국외 브랜드 청색광 차단렌즈에서의 청색광 반사율은 각각 431 nm와 448 nm에서 가장 큰 것으로 나타났다. 결론: LED에서 방출되는 청색광을 효과적으로 차단하기 위해서는 청색광 반사코팅을 450 nm, 선폭 27 nm인 가우스 곡선 형태로 설계할 것이 요구되며, 이러한 관점에서 일부 제품은청색광 차단설계의 변경을 고려하는 것도 좋을 것으로 사료된다.

참고문헌 (Reference)

1 육주성, "청색광 차단렌즈에서 미광이 상의 질에 미치는 영향" 한국산학기술학회 17 (17): 612-618, 2016

2 김창진, "국제표준에 의거한 청색광차단렌즈의 청색광차단율 및 시감투과율 평가" 한국안광학회 19 (19): 135-144, 2014

3 Taylor HR, "Visible light and risk of age-related macular degeneration" 88 : 163-173, 1990

4 KSSN(Korean Standards Service Network)., "Photobiological safety of lamps and lamp systems-Part 2: Guidance on manufacturing requirements relating to non-laser optical radiation safety. KS C IEC 62471-2"

5 British Standards, "Personal eye protection - Sunglasses and sunglare filters for general use. BS EN 1836"

6 정명훈, "LED 조명에 대한 청색광 위험 평가" 한국안광학회 20 (20): 293-300, 2015

7 International Commission on Non-Ionizing Radiation Protection, "Guidelines on limits of exposure to ultraviolet radiation of wavelengths between 180 nm and 400 nm (incoherent optical radiation)" 87 (87): 171-186, 2004

8 Rüdiger M, "Guidelines on limits of exposure to incoherent visible and infrared radiation" 105 (105): 74-96, 2013

9 International Commission on Non-Ionizing Radiation Protection, "Guidelines on limits of exposure to broad-band incoherent optical radiation (0.38 to 3 μm)" 73 (73): 539-554, 1997

10 Sliney DH, "Evaluation of optical radiation hazards" 12 (12): 1-24, 1973

11 Okuno T, "Evaluation of blue-light hazards from various light sources" 35 : 104-112, 2002

12 Benjamin WJ, "Borish's Clinical Refraction" Butterworth Heinemann Elsevier 298-, 2006

13 Made-in-China.com, "Assessment of the unique “blue light” hazard is critical"