Journal ArticleDOI
Fresnel zone plate telescopes for X-ray imaging I: experiments with a quasi-parallel beam
Sandip K. Chakrabarti,Sandip K. Chakrabarti,Sourav Palit,Dipak Debnath,A. Nandi,Vipin K. Yadav,Ritabrata Sarkar +6 more
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TLDR
In this paper, the fringe patterns produced by the zone plates in the presence of a quasi-parallel source were analyzed and compared with those obtained by Monte-Carlo simulations.Abstract:
Combination of Fresnel Zone Plates (FZP) can make an excellent telescope for imaging in X-rays. We present here the results of our experiments with several pairs of tungsten made Fresnel Zone plates in presence of an X-ray source kept at a distance of about 45 ft. The quasi-parallel beam allowed us to study sources placed on the axis as well as off the axis of the telescope. We present theoretical study of the fringe patterns produced by the zone plates in presence of a quasi-parallel source. We compare the patterns obtained from experiments with those obtained by our Monte-Carlo simulations. The images are also reconstructed by deconvolution from both the patterns. We compare the performance of such a telescope with other X-ray imaging devices used in space-astronomy.read more
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Journal ArticleDOI
Precision imaging multilayer optics for soft X-rays and extreme ultraviolet bands
TL;DR: In this article, the current status of and recent achievements by the Institute for Physics of Microstructures of the Russian Academy of Sciences (RAS) in the field are discussed.
Proceedings ArticleDOI
Lensless light-field imaging with multi-phased fresnel zone aperture
TL;DR: Details of the process to cancel several kinds of noise component in the detected image signals are described and its effectiveness theoretically and experimentally is discussed.
Journal ArticleDOI
Instruments of RT-2 experiment onboard CORONAS-PHOTON and their test and evaluation III: Coded Aperture Mask and Fresnel Zone Plates in RT-2/CZT payload
Anuj Nandi,Sourav Palit,Dipak Debnath,Sandip K. Chakrabarti,Sandip K. Chakrabarti,T. B. Kotoch,Roni Sarkar,Vipin K. Yadav,V. Girish,A. R. Rao,Dipankar Bhattacharya +10 more
TL;DR: In this paper, the results of simulations with different combinations of shadow-casters (CAM and FZP) and detectors are employed in the RT-2/CZT payload.
Journal ArticleDOI
Fresnel zone plate telescopes for X-ray imaging II: numerical simulations with parallel and diverging beams
Sourav Palit,Sandip K. Chakrabarti,Sandip K. Chakrabarti,Dipak Debnath,A. R. Rao,A. Nandi,Vipin K. Yadav,V. Girish +7 more
TL;DR: In this paper, the authors present the results of simulations of shadows cast by a zone plate telescope which may have one to four pairs of zone plates and demonstrate the physical basis of the resolution of the telescope and demonstrate this by simulations.
References
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Radiological Imaging: The Theory of Image Formation, Detection, and Processing
TL;DR: This paper presents a meta-thesis on the application of Linear Systems Theory to Radiographic Imaging, and its application to three-Dimensional Imaging.
Journal ArticleDOI
Fourier transform photography: a new method for X-ray astronomy
TL;DR: In this paper, a pinhole camera with resolutions better than 10−3 rad is presented. But the apertures are very small, not greater than about 10−4 cm2.