Method and storage medium for controlling the treatment of a crystal with a liquid

A method of controlling the treatment of a free-mounted crystal with a liquid comprising the steps of: a) it is received by at least an image pickup system, an image signal representing a momentary image of a free-mounted crystal with liquid environment, wherein are applied onto the crystal during the crystal treatment process drops of an electrically controllable microdosage system, containing a liquid with which treated the crystal shall be; b) it is processed and the image signal from the image signal the momentary surface of the two-dimensional image region representing the whole of crystal with liquid environment or the momentary volume of the crystal unit are determined with liquid environment; c) comparing the momentary surface or the momentary volume with a set value; d) in case of deviation of the surface or the volume from the reference value is determined, a correction drop control signal and sent to the microdosage system, the drops correction signal is formed such that a corrected frequency and / or size and / or shape of ...