PROBLEM TO BE SOLVED: To provide a technology to change an optical path or the length of an optical path without using a mechanical mechanism.SOLUTION: A liquid optical device 100 that emits incident light as reflection light or transmission light includes a polar liquid 132 and a nonpolar liquid 133, which are separated, an electrode drive electrode layer 123 and a transparent electrode 129 for applying voltage to the polar liquid 132, and a control part 101 for controlling one or both of a place to which the voltage is applied and the voltage. By the control, the direction of a boundary surface 135 of the two kinds of liquids is changed, and by the change in the direction of the boundary surface 135, the reflection direction of the light or the phototropism direction in the boundary surface 135 is changed. By the change in the reflection direction of the light or the phototropism direction in the boundary surface 135, the direction of the emitted light is controlled.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】機械的な機構を用いずに光路または光路長の変更が可能な技術を提供する。【解決手段】入射光を反射光または透過光として出射する液体光学装置100であって、分離した有極性液132および無極性液133と、有極性液132に電圧を加える電極駆動電極層123および透明電極129と、前記電圧を加える場所および電圧の一方または両方を制御する制御部101とを有し、前記制御により、前記2種類の液体の界面135の向きが変更され、界面135の向きが変更されることで、界面125における光の反射方向または光の屈性方向が変更され、界面135における光の反射方向または光の屈性方向の変更により、出射する光の方向の制御が行われる。【選択図】図1
