Patent ID: 7593091

Claim:
An imaging or exposure device comprising a radiation source ( 1 ) emitting radiation ( 2 ), a reticle ( 3 ) mounted between the radiation source and an optical projection system ( 4 ) for shaping the radiation downstream from the reticle ( 3 ), the optical projection system ( 4 ) comprising a series of mirrors ( 7 , 8 , 10 , 11 ) for making an image ( 5 ) of the reticle ( 3 ), a plurality of mirrors ( 10 , 11 ) of the optical projection system ( 4 ) being deformable mirrors including deformer members ( 12 , 13 ) connected to a control unit ( 14 ), the device being characterized in that the number of deformable mirrors is strictly limited to two, the control unit being associated with an image analyzer ( 15 ) to deform one of the deformable mirrors ( 10 ) mainly as a function of differences relative to an image quality setpoint, and to deform the other deformable mirror mainly as a function of differences relative to an image distortion setpoint.