| 摘要 |
In order to prevent the overall excitation laser diode intensity from changing when any of a plurality of in-use excitation laser diodes is switched to a spare excitation laser diode, the present invention provides a laser diode driver which is provided with a driving means which, in response to the output state of a plurality of laser diodes connected in series between two power sources, controls the driving of a prescribed laser diode. The driving means includes a current control means taking as an input a signal corresponding to the output of an individual laser diode and controlling the current supplied to the individual laser diode in response to the input signal, a current path control means for controlling the current control means in response to the input signal, and a laser diode control means for controlling the current supplied between the power sources in response to the input signal. |
