Since the microlithography with high number aperture(NA) projection objectives requires the correction of thermal lens aberrations, a deformable plane-parallel optical plate with continuous facesheet, 16 discrete actuators has been designed from the elasticity theory. Both axial forces and tangential bending moments are applied to the discrete position outside the clear aperture. The deformable plate needs to meet the condition that each actuator can generate a positive or a negative axial force. The deformable plate has been simulated by finite element modeling (FEM), the results show that the difference between the simulation force and the theory force is always less than 0.064N when the deformation is one of Z4-8 low order Zernike modes with 100nm coefficient, the axial forces are minor and the fitting errors of the aberrations are less than 5%.
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