RELAY DEVICE, AND EXCITATION LIGHT SUPPLY DEVICE AND EXCITATION LIGHT SUPPLY METHOD THEREFOR

摘要

The purpose of the present invention is to allow a relay device to be continuously used even when some of a plurality of light-emitting elements break down. An excitation light supply device is provided with: a light source unit (50) which includes a plurality of excitation light source modules (51 (51a to 51d)) having light-emitting elements (52(52a to 52d)) for emitting excitation light and monitor elements (53(53a to 53d) for monitoring the excitation light from the light-emitting elements (52(52a to 52d)); a distribution unit (40) which synthesizes and distributes the excitation light from the plurality of excitation light source modules (51 (51a to 51d)); and a control unit (60) which supplies a drive current in series to a plurality of the light-emitting elements (52(52a to 52d)) in the plurality of excitation modules (51 (51a to 51d)).