Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 15, 2018 - October 16, 2018
Deformable mirrors are essential components in fundus imaging modality incorporating adaptive optics systems. Appropriate shape control of the mirror surface by actuators is necessary so that optical aberrations caused by a patient’s eye can be nullified. Although much number of actuators is required for precise shape control, the number of actuators should be minimized in terms of the manufacturing cost. In this scenario, layout optimization is an effective and powerful approach. In this paper, we present an optimization method of actuators’ layout which consists of the minimum number of actuators, while offering the minimum error between a target mirror shape and the actual deformed mirror shape by optimizing the electric current values applied to each actuator. The proposed method introduces design variables for the layout optimization problem as variables controlling the weighting coefficients of the electric current minimization which enables to reduce the number of actuators. This formulation allows us to use mathematical programming for solving the layout optimization problem. A numerical example is provided to confirm the validity of the proposed method.
