Apparatus for capturing an image
An apparatus for capturing an image of a sample retained by a sample acquiring device, comprises an image capturing unit comprising a lens arrangement with a fixed focal plane, a sample holder comprising a first magnet unit, and a second magnet unit. The sample holder is adapted to receive the sample acquiring device and is movable in relation to the lens arrangement to a first position. The sample holder is movable from the first position to a second position by means of magnetic interaction of the first magnet unit and the second magnet unit, and the image capturing unit is adapted to capture an image of the sample by means of the lens arrangement when the sample holder is in the second position.
1. Apparatus for capturing an image of a sample retained by a sample acquiring device, comprising an image capturing unit comprising a lens arrangement with a fixed focal plane, a sample holder comprising a first magnet unit, and a second magnet unit,
the sample holder being adapted to receive the sample acquiring device and being movable in relation to the lens arrangement to an aligned position, in which aligned position the first and the second magnet units are arranged in such close relation that they may magnetically interact,
the sample holder being movable upwards in relation to the apparatus from the aligned position to an interaction position by magnetic interaction of the first magnet unit and the second magnet unit, and
the image capturing unit being adapted to capture an image of the sample by the lens arrangement when the sample holder is in the interaction position.
2. Apparatus according to claim 1 , further comprising an inlet station, the sample holder being adapted to receive said sample acquiring device in said inlet station.
3. Apparatus according to claim 2 , further comprising a third magnet unit,
the third magnet unit being adapted to position the sample holder in the inlet station by magnetic interaction of the first magnet unit and the third magnet unit.
4. Apparatus according to claim 3 , wherein the first and third magnet units are arranged to position the sample holder in the inlet station by attracting magnetic forces.
5. Apparatus according to claim 2 , further comprising a transfer unit,
the transfer unit being arranged to support the sample holder and to transfer said sample holder from the inlet station to the aligned position.
6. Apparatus according to claim 5 , wherein the transfer unit is movable between the inlet station and a position in which the sample holder is positioned in the aligned position.
7. Apparatus according to claim 5 , wherein the second magnet unit is arranged on the transfer unit.
8. Apparatus according to claim 5 , wherein the third magnet unit is arranged on the transfer unit.
9. Apparatus according to claim 1 , further comprising an alignment means for aligning the sample holder in relation to the lens arrangement when it is moved from the first to the interaction position.
10. Apparatus according to claim 9 , wherein the alignment means is arranged on the transfer unit.
11. Apparatus according to claim 1 , wherein the first and the second magnet units are arranged to move the sample holder from the aligned position to the interaction position by repellent magnetic forces.
12. Apparatus according to claim 1 , wherein the sample holder is adapted to receive a sample acquiring device in the form of a cuvette.
13. Apparatus according to claim 12 , wherein the cuvette is placed horizontally in the sample holder for image capturing.
14. Apparatus according to claim 1 , further comprising an image processing unit,
the image processing unit being adapted to process an image of the sample.
15. Apparatus according to claim 14 , wherein the image processing unit is adapted to identify and count particles in the sample.
16. Method for capturing an image of a sample in a sample acquiring device, said method comprising:
positioning the sample acquiring device in a sample holder comprising a first magnet unit,
transferring said sample holder in relation to a lens arrangement with a fixed focal plane of an image capturing unit to an aligned position, in which aligned position the first and a second magnet units are arranged in such close relation that they may magnetically interact,
moving the sample holder upwards in relation to the apparatus from the aligned position to an interaction position by magnetic interaction of the first magnet unit and the second magnet unit, and
capturing an image of the sample by the lens arrangement when the sample holder is in the interaction position.
17. Method according to claim 16 , further comprising:
processing said image in an image processing unit in order to identify and count particles in the sample.