Disclosed herein is a method of calibrating a device for optical analysis of a sample containing biological cells, a device for optical analysis of a sample containing biological cells, a calibration sample kit for calibrating a device for optical analysis of a sample containing biological cells and a computer program product. The method of calibrating a device for optical analysis of a sample containing biological cells comprises providing a calibration sample comprising one or more red blood cells having a nucleus. A first optical distance value and a second optical distance value are determined using the device. The first optical distance value characterizes an optical path length along a first optical path extending through the nucleus of a target cell selected from the one or more red blood cells. The second optical distance value characterizes an optical path length along a second optical path extending through the target cell, but not through the nucleus of the target cell. The first and second optical distance values are compared to one or more reference values. Based on the comparison of the determined optical distance values and the respective reference values it is determined whether the device is functional.     «

Disclosed herein is a method of calibrating a device for optical analysis of a sample containing biological cells, a device for optical analysis of a sample containing biological cells, a calibration sample kit for calibrating a device for optical analysis of a sample containing biological cells and a computer program product. The method of calibrating a device for optical analysis of a sample containing biological cells comprises providing a calibration sample comprising one or more red blood c...     »