[21p-P05-1~5] 3.5 Laser system and materials

[21p-P05-5] Development and Characterization of Fast Deformable Mirrors:
A Control Model using the Influence Function (IF) Approach

〇Haik Chosrowjan¹, Seiji Taniguchi¹, Yoshifumi Inada¹, Shinji Motokoshi¹, Masayuki Fujita¹, Takuya Noritake³, Masashi Iwashimizu³, Shingo Nishikata³, Hiroyuki Daigo³, Naoto Sakaki², Tomohiro Tsukihana², Toshikazu Ebisuzaki² (1.ILT, 2.RIKEN, 3.MHI)

Keywords:deformable mirror

A deformable mirror (DM) control model based on the prior determination of the influence functions (IF) of individual piezo-actuators (PAs) in the DM is described for “open-loop” applications. Two control cases, with- and without neglecting the crosstalk effects between the neighboring PAs in the DM, are elucidated. A 19PA DM, a prototype for 61PA DM, has been built, experimentally characterized by the IF control model, and demonstrated by reproducing the individual Zernike polynomials and synthetically generated random wavefronts. It was experimentally demonstrated that when the crosstalk between the neighboring PAs is not negligible, it must be taken into consideration for successful control and operation of the real DM.