Simulational and experimental investigation on the print-through high-frequency aberration of the shear-joint NIF deformable mirror

Design of novel deformable mirror with large displacement

“…The actuators were arranged in a hexagonal shape with a spacing of 13 mm and installed in a rigid basement. Since the thickness of the mirror was 200 μm, the contact area between the actuator and the mirror should be as small as possible to reduce the print‐through effect, 68,86 so a ball head post attachment was used to connect the actuator and the mirror. The maximum displacement consisting of the elongation (68.2 μm) and compression displacements (14.3 μm) for PADM is 82.5 μm, as shown in Figure 17.…”

Calculating the area of a particular deformation region of an optical surface based on the finite element method

“…The methods used to describe the deformed surface vary depending on the optical requirements. There are two commonly used methods, one is to calculate the peak-tovalley value or the root-mean-square value of the deformation to describe the degree of deformation [10][11][12][13][14][15][16][17], and the other is to use the Zernike polynomial to describe the shape of the deformed optical surface [18][19][20][21][22][23][24][25][26][27]. In some cases, special characteristics can be used to represent the deformation, such as the using of the deformation at a particular location [28] or the spherical aberration of the surface deformation [29] to represent the deformation of the entire surface.…”