PROBLEM TO BE SOLVED: To provide a sensor device for a plant for appropriately obtaining reflected rays of light from a growing situation measurement object of two measurement rays of light having different wavelength.SOLUTION: A sensor device for a plant includes: a first light emission part 26 for emitting first measurement rays of light P1 having first wavelength to irradiate a growing situation measurement object a second light emission part 27 for emitting second measurement rays of light P2 having second wavelength to irradiate the growing situation measurement object a light reception part for receiving the reflected rays of light of each of the measurement rays of light from the growing situation measurement object, and for outputting a light reception signal a control part for controlling emission from the first light emission part 26 and emission from the second light emission part 27 in different timings optical path merging means 63 for merging the first emission optical path of the first measurement rays of light from the first light emission part 26 and the second emission optical path of the second measurement rays of light from the second light emission part 27 and common emission optical paths 64, 65, 67 and 69 for connecting the optical path merging means with an emission part which emits the first measurement rays of light and the second measurement rays of light to the growing situation measurement object.COPYRIGHT: (C)2013,JPO&INPIT【課題】異なる波長の2つの測定光の生育状況測定対象からの反射光をより適切に取得することを可能とする植物用センサ装置を提供する。【解決手段】植物用センサ装置は、生育状況測定対象を照射すべく第1波長の第1測定光P1を出射する第1発光部26と、生育状況測定対象を照射すべく第2波長の第2測定光P2を出射する第2発光部27と、生育状況測定対象による各測定光の反射光を受光して受光信号を出力する受光部と、第1発光部26からの出射と第2発光部27からの出射とを異なるタイミングで発光制御する制御部と、第1発光部26からの第1測定光の第1出射光路と、第2発光部27からの第2測定光の第2出射光路と、を合流する光路合流手段63と、光路合流手段と第1測定光および第2測定光を生育状況測定対象へ向けて出射する出射部とを接続する共通出射光路64、65、67および69と、を備える。【選択図】図10
