Detector plane alignment adjusting device

The invention relates to an alignment adjusting device for an optical focal plane assembly, comprising a detector support (23) for receiving a detector defining a detector plane and adapted to be mounted to an optics assembly having an optical focal plane. The alignment adjusting device is adapted for allowing an alignment of the detector plane representing an image area and the optical focal plane. The alignment adjusting device comprises the detector support (23) ; a plurality of members (15, 13, 12, 4, 8), wherein a first member (15) of the plurality of the members is a flexible joint connected to the detector support (23) and a second member (8) of the plurality of the members is an intermediate ring connected to a flange (1) that is adapted to be connected to the optics assembly. The first member (15), the second member (8) and the remaining number of the members are pairwise moveable connected to each other by means of a number of springs (11) and/or a number of supporting elements (5), the number of springs (11) and/or the number of supporting elements (5) being adapted to enable a translational movement along axes x, y, z and/or a rotational movement around the axes x, y, z of a given coordinate system.