Abstract
All of the existing holographic wavefront sensors are either bulky or have low accuracy of measuring wavefront aberrations. In this paper, we present an improvement of the holographic method of measuring wavefront aberrations using computer-generated Fourier holograms. The novelty of this work lies in the proposed approach to the synthesis of Fourier holograms, which are implemented using phase-only SLM. The main advantages of this method are the increased diffraction efficiency compared to the previously known methods, and the more compact implementation scheme due to the elimination of the conventional Fourier-lens. The efficiency of the proposed method was confirmed by numerical simulation and optical experiments.
Highlights
New methods and devices with a wide variety of properties and parameters [1,2,3] are being developed based on controllable optical components due to the variety and flexibility of such devices.Microdisplays are used more and more often as metrological tools for monitoring parameters of laser beams, in adaptive atmospheric sounding systems, imaging optical holography systems, etc. [4,5]
This direction is based on the registration of a hologram using a matrix detector and subsequent reconstruction of the objective wave using computer algorithms, which in turn has become a common tool for research and practical applications in various fields
Another direction that differs from digital holography is computer holography
Summary
New methods and devices with a wide variety of properties and parameters [1,2,3] are being developed based on controllable optical components due to the variety and flexibility of such devices.Microdisplays are used more and more often as metrological tools for monitoring parameters of laser beams, in adaptive atmospheric sounding systems, imaging optical holography systems, etc. [4,5]. The development of computer technologies as well as solid-state singe pixel and matrix optical detectors has created a new direction in holography—Digital holography. This direction is based on the registration of a hologram using a matrix detector and subsequent reconstruction of the objective wave using computer algorithms, which in turn has become a common tool for research and practical applications in various fields. Another direction that differs from digital holography is computer holography. Digital and computer holography methods provide more opportunities for analyzing the amplitude and phase of an optical field in comparison with the traditional optical process and allow for the implementation of a holographic wavefront sensor, which provides additional method flexibility [6,7]
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