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摘要: 为了研究不同黄疸治疗仪光源的发光光谱对新生儿产生紫外辐射、热辐射等潜在的光生物安全问题，本文利用光辐射安全测定系统OST-300对传统蓝光荧光灯、普通蓝光LED灯以及经简单遗传算法计算与拟合的蓝光LED灯进行了测试与对比分析。实验结果表明：传统蓝光荧光灯在315，330，365 nm的紫外光处有明显的波峰出现，且峰值波长在365 nm处较为明显；传统蓝光荧光灯在老化后其蓝光光谱光衰严重，且存在大量的红外光线；而基于简单遗传算法计算与拟合的蓝光LED发光光谱与体内胆红素的吸收光谱相吻合，能避免对新生儿的光辐射危害。因此，本文提出的蓝光LED是治疗新生儿黄疸的理想光源。Abstract: In order to research the ultraviolet radiation, thermal radiation and other potential photobiological safety problems in different luminescence spectra of jaundice therapeutic devices, the spectrum of the traditional blue fluorescent lamp, the common blue LED lamp, the blue LED lamp through calculation and fitting by the simple genetic algorithm are tested and compared using the optical radiation safety test system OST-300. Experimental results indicate that, there are three obvious peaks at 315, 330 and 365 nm for the traditional blue fluorescent lamp, and the peak is more obvious at 365 nm; the blue spectrum attenuation of the traditional blue fluorescent lamp after aging is serious, existing a lot of infrared light. The spectrum of the blue light LED based on calculation and fitting by the simple genetic algorithm conforms to the absorption spectrum of bilirubin in vivo. The blue light LED can avoid the optical radiation damage to the neonate, and it is an ideal light source for the neonatal jaundice treatment.
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图 1 不同波长的光对皮肤的穿透能力
Figure 1. Ability of different wavelength of light to penetrate the skin
图 3 4种样品的发光光谱与体内胆红素吸收光谱
Figure 3. Luminescence spectra of four kinds of samples and absorption spectra of bilirubin in vivo
图 4 样品1和样品4在250~400 nm处的紫外光谱
Figure 4. Ultraviolet spectra of sample 1 and sample 4 at 250-400 nm
图 5 样品2和衰减后蓝光荧光灯在250~400 nm处的紫外光谱
Figure 5. UV spectra of sample 2 and attenuated blue fluorescent lamp at 250-400 nm
表 1 不同光源在18 Lx时的光化学紫外危害与皮肤热危害
Table 1. Ultraviolet chemical hazards and thermal skindamage of different light sources in 18 Lx
危害名称 衰减后的蓝
光荧光灯传统蓝
光荧光灯普通蓝光
LED(S2)特殊蓝
光LEDES/(W·m-2) 2.70×10-5 3.40×10-6 3.10×10-8 2.80×10-5 EH/(W·m-2) 0.480 0.24 0.450 0.150 
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表 2 不同光源在500 Lx时光化学紫外危害与皮肤热危害
Table 2. Ultraviolet chemical hazards and thermal skindamage of different light sources in 500 Lx
危害名称 传统蓝光
荧光灯普通蓝光
LED(S2)普通蓝光
LED(S3)特殊蓝光
LEDES/(W·m-2) 4.50×10-5 1.80×10-7 1.8×10-5 1.80×10-8 EH/(W·m-2) 4.60 8.40 8.2 2.90
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表 3 不同光源在辐照度为200 μW·cm-2时光化学紫外危害与皮肤热危害
Table 3. Ultraviolet chemical hazards and thermalskin damage of different light sources in200 μW·cm-2 irradiance
危害名称 传统蓝光
荧光灯普通蓝光
LED(S2)普通蓝光
LED(S3)特殊蓝
光LEDES/(W·m-2) 1.8×10-5 2.1×10-8 3.7×10-10 7.1×10-9 EH/(W·m-2) 3.2 2.7 2.1 2.6
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