METHOD FOR CALIBRATING A RAIN SENSOR, COMPUTER PROGRAM PRODUCT, RAIN SENSOR SYSTEM AND VEHICLE

A method for calibrating a rain sensor (), the rain sensor () being configured to measure a quantity of rain on a window () of a vehicle (), the rain sensor () including a transmitter () and a receiver (), the transmitter () being configured to emit or transmit light to the window () and the receiver () being configured to receive measurement light that is emitted or transmitted by the transmitter () and guided to the receiver () by the window (); the method comprising: