| 摘要 |
There is provided an abnormality detector for a light source including a laser diode (12) which emits an excitation light and a fluorescent substance (14) which is excited by the excitation light to generate a fluorescent light. The abnormality detector includes a first photo sensor (32) which is sensitive to a wavelength of the excitation light, a second photo sensor (34) which is sensitive to a wavelength of the fluorescent light, a first current-voltage conversion circuit (36) which outputs a first detection signal based on an output of the first photo sensor, a second current-voltage conversion circuit (38) which outputs a second detection signal based on an output of the second photo sensor, and a determination unit (40) which determines whether an abnormality occurs based on the first detection signal and the second detection signal. |
