To provide a droplet sensor having a large detection area and a high sensitivity with a simple configuration.SOLUTION: A droplet sensor includes: an optical cover having a curved surface forming a part of a spheroid; a light source disposed at a first focal position of an ellipse facing the curved surface; and a photodetector disposed at a second focal position of the ellipse. The eccentricity of the ellipse is set so that the curved surface includes an effective detection area that satisfies the total reflection condition on the boundary surface with gas and does not satisfy the total reflection condition on the boundary surface with liquid.SELECTED DRAWING: Figure 1
【課題】簡単な構成で広い検出面積と高い感度を有する液滴センサを提供する。【解決手段】液滴センサは、回転楕円体の一部を形成する湾曲面を有する光学カバーと、前記湾曲面と対向する楕円の第1の焦点位置に配置される光源と、前記楕円の第2の焦点位置に配置される光検出器と、を有し、前記湾曲面が、気体との界面で全反射条件を満たしかつ液体との界面で全反射条件を満たさない有効検出エリアを有するように、前記楕円の離心率が設定されている。【選択図】図1
DROPLET SENSOR
液滴センサ
2019-07-22
Patent
Elektronische Ressource
Japanisch
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