| abstract |
An object of the present invention is to provide an optical element, a lens unit, and an imaging device that can maintain light transmission over a long period of time. A liquid that has different refractive indexes, is immiscible with each other, has optical transparency, and contains an aqueous liquid and an oily liquid, and transmits light at least in a predetermined optical axis direction. Cover that covers at least a part of the inner surface of the container and the liquid container, and changes the hydrophilicity / hydrophobicity of the surface by changing the shape of the molecules in contact with the aqueous or oily liquid upon application of voltage. A film and an electrode for applying a voltage to the coating film are provided. Since it is not necessary to discharge electric charges to the liquid in order to change the shape of the boundary surface of the liquid, it is possible to avoid the problem that bubbles are generated due to electrolysis of the liquid, and light transmission can be maintained over a long period of time. . [Selection] Figure 4 |