Method for cleaning visible area of optical monitoring device

The invention relates to a method for cleaning a visible region through a transparent element (10) of an optical monitoring device (100), comprising the following method steps: forming a liquid sealing film (50) on the transparent element (10); ultrasonic waves (64) are coupled into the transparent element (10), and loosening of dirt (70) and/or adherends on the transparent element (10) is promoted by the ultrasonic waves (64) coupled into the liquid film (50) and/or the transparent element (10). 本发明涉及一种用于使透过光学监控装置(100)的透明元件(10)的可视区域清洁的方法，所述方法具有如下方法步骤：-在所述透明元件(10)上构造液体的封闭膜(50)；-将超声波(64)耦合输入到透明元件(10)中，其中，通过耦合输入到液体膜(50)和/或透明元件(10)中的超声波(64)来促进在透明元件(10)上的污物(70)和/或粘附物的松脱。