Product Code: ILSC2009_1307

Assessment of LED's Radiation Safety
Authors:
Mou Tongsheng, Optical Engineering Department of Zhejiang University; Hangzhou Peoples Republic of China
Yu Jiandong, Zhejiang University Sensing Instruments; Hangzhou Peoples Republic of China
Presented at ILSC 2009

Recent years, LED technology as well as its applications grow very fast, which deserve more attention to the hazard of LED radiation. The spectral integrated radiances are important parameters in hazard analysis of LED radiation. However, traditional spectral luminance meters are not able to be used to determine spectral integrated radiances in accordance with IEC 62471. Therefore, a novel photobiological safety measurement system, which consists of a CCD imaging meter, a temporal spectroradiometer, a rotating mechanism with motor-drivable horizontal axis and the vertical axis, and an optical bench (8m) is introduced. The CCD imaging meter is installed on a retinal radiance meter whose field of view and aperture angle are fixed, can be used to determine the radiance distribution of the apparent source and the maximum radiance over specified field of view in accordance with IEC 62471. The temporal spectroradiometer is used to correct the spectral response of the CCD unit, determine the spectral integrated irradiance, and can also be used to determine the waveform and pulse duration at 1MHz sampling frequency.