Patent ID: 7072105

Claim:
A device for positioning a plate [ 2 ] comprising one or more samples on an observation or analysis device comprising an observation or analysis lens [ 3 ] of at least part of a sample along an observation axis from an observation face [ 2 b ] of the plate [ 2 ] and a chassis [ 11 ] having a support assembly [ 20 ]for the plate [ 2 ], wherein this support assembly [ 20 ] comprises: a first movable frame [ 21 ] sliding in a plane perpendicular to the observation axis; a second movable frame [ 22 ] supported by the first frame [ 21 ] sliding in said plane perpendicular to the observation axis, the first and second frames [ 21 and 22 ] being movable in a direction perpendicular to the direction in which other frame moves, a third frame [ 23 ] supported by the second frame [ 22 ] by means [ 30 ] used to maintain the third frame [ 23 ] blocked in the plane perpendicular to the observation axis, while leaving the third frame [ 23 ] free to move essentially along the observation axis, said third frame [ 23 ] presenting means [ 31 and 33 ] to immobilise the plate [ 2 ], and means [ 40 ] for ensuring a constant distance between the lens [ 3 ] and the observation face [ 2 b ] of the plate [ 2 ].