Evaluation of focus measures under different wavefront aberrations for deformable mirror control in adaptive optics systems

Hyungsuck Cho; Xiaodong Tao; Deokhwa Hong

doi:10.1117/12.817969

18 November 2008 Evaluation of focus measures under different wavefront aberrations for deformable mirror control in adaptive optics systems

Hyungsuck Cho, Xiaodong Tao, Deokhwa Hong

Author Affiliations +

Proceedings Volume 7138, Photonics, Devices, and Systems IV; 713805 (2008) https://doi.org/10.1117/12.817969
Event: Photonics, Devices, and Systems IV, 2008, Prague, Czech Republic

Abstract

In conventional Adaptive optics (AO) system, wavefront aberration is measured by wavefront sensor. However, a point source is usually not available in most imaging systems. Therefore development of deformable mirror control scheme in adaptive optics system based on vision information will extend the application area of AO technique. A focus measure (FM) is a measure of image quality and can be calculated from image data obtained from the image sensor. It can be used to find the optimal shape of the deformable mirror that compensates the wavefront aberration. In this paper, we analyze the performance of focus measures under different types of wavefront aberrations. The relation of FM vs. the aberration strength is analyzed systematically for different aberration modes and different FM functions. The FM performance under combination of aberrations is also investigated. This research supplies a guide for selection of the suitable FM function and strategy for control of deformable mirror in the AO system.

Citation Download Citation

Hyungsuck Cho, Xiaodong Tao, and Deokhwa Hong "Evaluation of focus measures under different wavefront aberrations for deformable mirror control in adaptive optics systems", Proc. SPIE 7138, Photonics, Devices, and Systems IV, 713805 (18 November 2008); https://doi.org/10.1117/12.817969

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