Calculation of Temperature Rises in the Human Eye Exposed to EM Waves in the ISM Frequency Bands(Special Issue on Recent Progress in Electromagnetic Compatibility Technology)

概要

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The interaction between the human eye and electromagnetic (EM) waves in the ISM(industrial, scientific, and medical)frequency bands is investigated with the use of the finite-difference time-domain(FDTD)method. In order to assess possible health hazards, the specific absorption rates(SARs)are calculated and compared with the recommended safety standards. In particular, we calculate temperature rises in the human eye to assess the possibility of microwave-induced cataract formation. The results show that the maximum values of averaged SARs are less than the standard levels. In addition, we observed what is called the 'hot spot'in the region of eye humor at 2.4GHz but not at 900 MHz and 5.8GHz. Furthermore, the maximum temperature rise due to the incident EM power density of 5.0 mW / cm^2, which is the MPE(maximum permissible exposure)limit for controlled environments, has been found to be at most 0.26℃ at 5.8GHz, which is small compared with the threshold temperature rise 3.0℃ for cataract formation.
社団法人電子情報通信学会の論文
2000-03-25