Abstract
We developed a fast phase retrieval algorithm that is suitable for real-time applications such as adaptive optics. The phase retrieval model is developed by linearising the pupil function in the approximation of small aberrations and is valid for low-NA focused field. The linear model in conjunction with a particular choice for the position of the single out-of-focus measurement plane and an efficient control algorithm, significantly reduces the computation time for phase retrieval. The experimental results demonstrate the validity of the described approach for fast correction of aberrations.
Highlights
Applications of adaptive optics [1] (AO) are rapidly spreading in several fields outside of its initial use in astronomy
An effective way to reduce the computational time of the aberration retrieval problem is by identifying a single plane of measurement in the focal region which is optimal for phase retrieval
We have developed a linear model for a phase retrieval algorithm in the approximation of small aberrations for the case of a lower-numerical aperture (NA) focused field
Summary
Applications of adaptive optics [1] (AO) are rapidly spreading in several fields outside of its initial use in astronomy. The time required to estimate the aberrations is considerable longer than needed for a direct wavefront sensor This is mainly caused by the necessity to measure several out-of-focus images in order to achieve a stable and accurate estimate of the aberrations [12]. In order to obtain a real-time phase estimation based on non-linear phase retrieval, a highperformance computing system has to be employed to decrease the computational time required for the phase aberration estimation When such hardware is not available, proper approximations of the phase retrieval model and efficient control algorithms need be developed to obtain a satisfying performance on a simple hardware bench [17, 18]. In this paper we develop a linear phase retrieval model based on the approximation of small aberrations in the exit pupil function of an optical system.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the European Optical Society-Rapid Publications
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
