Mountford P J, Pepper M G, Goldin D
Phys Med Biol. 1984 Apr;29(4):407-17. doi: 10.1088/0031-9155/29/4/010.
A system has been developed to monitor and integrate on-line a small fraction of the monochromatic ultraviolet radiation directed at the skin from a phototest source, thus correcting for fluctuations in the irradiance. On completion of the required test dose, the exposure is terminated automatically. Radiation is reflected from a silica plate, housed in a skin applicator, onto a photodiode connected to an integrator. The variation of the reflectivity of the silica plate with wavelength and with incident angle was calculated. The reflectivity of the applicator with and without the silica plate in situ was studied experimentally. Measurements were made of the spatial distribution of irradiance from and across the face of the applicator. To calibrate the photodiode current, the absolute irradiance at the face of the applicator had to be measured with a wide angle detector. No significant deviation from a linear variation was observed between changes in the skin irradiance and changes in the photodiode current.
已经开发出一种系统，用于监测并在线整合来自光测试源照射到皮肤上的一小部分单色紫外线辐射，从而校正辐照度的波动。在达到所需测试剂量后，曝光会自动终止。辐射从置于皮肤施照器中的一块石英板反射到与积分器相连的光电二极管上。计算了石英板的反射率随波长和入射角的变化。对有石英板和无石英板在位时施照器的反射率进行了实验研究。对施照器表面及其横截面上的辐照度空间分布进行了测量。为了校准光电二极管电流，必须使用广角探测器测量施照器表面的绝对辐照度。在皮肤辐照度变化与光电二极管电流变化之间未观察到明显偏离线性变化的情况。
