The paper by M. K. Kim explores the application of a suitably modified incoherent digital holography setup to adaptive optical systems. Adaptive Optics (AO) refers to real-time sensing and correcting of a wavefront for applications involving imaging through randomly fluctuating media (e.g. astronomical imaging through turbulent atmosphere). Ground based telescopes using AO correction are now capable of obtaining high quality astronomical images. The typical AO system consists of a Shack-Harmann wavefront sensor and a multi-element deformable mirror for wavefront correction. AO system implementation has many engineering challenges – particularly due to the near real time wavefront correction requirements. The incoherent digital holographic adaptive optics (IDAHO) concept discussed in this paper provides an interesting alternative to the traditional AO systems. The paper provides a framework for describing an incoherent digital holography system in the presence of aberrations and the subsequent aberration correction. The IDHAO system is then evaluated in terms of resolution, aberration type/strength, and noise. Simulations and experiments are shown for both point like and extended objects. An IDHAO system is likely to be a low cost leaner system compared to traditional AO systems with potentially similar wavefront correction and imaging performance.
01/05/2014 9:54 AM
I enjoyed reading this article, the author succeeded in presenting the topic even to a lay person.
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