Calibration device

A method for manufacturing a calibration device for a diagnostic device comprising a digital imaging device arranged to record an image of at least one sample container, the method comprising the steps of:

• digitally imaging at least one sample container containing at least one biological sample to obtain a first image;
• processing the first image to obtain a second image, wherein the processing of the first image comprises applying at least one transfer function to the first image;
• and
• printing a representation of the second image onto a substrate to obtain a calibration device.

A calibration device for calibration of a diagnostic device that comprises a digital imaging device arranged to record an image of at least one biological sample, the calibration device comprising:

• a substrate;
• a printed layer printed on the substrate;
• and
• the printed layer comprising a printed representation of at least one sample container that contains at least one biological sample of known properties;
• and
• wherein said printed representation is arranged on the substrate such that an image of the calibration device taken with the digital imaging device of the diagnostic device substantially corresponds to another image of said at least one sample container that is obtained by digitally imaging said at least one sample container with the digital imaging device of the diagnostic device.