The invention relates to a divider changer in a laser scanning microscope. Said divider changer has several beam dividers that can be introduced into the beam path and can be replaced by at least one other divider changer. The invention also relates to a method for correcting tolerance errors during the replacement of colour dividers in a laser scanning microscope. A scanner offset voltage correction value is determined for at least two colour dividers and adjusted when the divider is changed.
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