Reducing measurement variation related to optical measure of sample material

A method for reducing measurement variation related to optical measuring of sample material, comprising:

• punching or cutting off a piece from a sample carrier onto which liquid sample material has been impregnated and dried;
• and
• conveying the piece of the sample carrier to a sample well where at least part of the sample material elutes from the piece of the sample carrier in measurement solution contained by the sample well;
• wherein the method comprises the following steps:
• carrying out at least two optical measurements from at least two different capture ranges whose center points are inside the sample well that contains at least the sample material and the piece of the sample carrier so as to obtain at least one optical measurement whose capture range is outside the piece of the sample carrier, each capture range being a range from which radiation is captured in the respective optical measurement, the capture range of each optical measurement being an ellipse having a primary axis longer than a secondary axis and the capture ranges of two optical measurements are situated on opposite fringes of an interior of the sample well so that the secondary axes of the ellipses representing the capture ranges of these optical measurements coincide substantially with a diameter line of the sample well;
• and subsequently
• forming a measurement result from results of the at least two optical measurements in accordance with a pre-determined rule,
• whereby measurement variation related to optical measuring of the sample material and caused by the piece of the sample carrier contained by the sample well is reduced.