Journal ArticleDOI
Fourier transform photography: a new method for X-ray astronomy
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TLDR
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.Abstract:
In comparison with all other branches of astronomy, X-ray astronomy suffers from a relative dearth of image forming devices. No X-ray lens is known and image formation by reflection requires glancing incidence optics which have small fields of view and are extremely difficult to fabricate, even for the small apertures (about 2 cm2) now employed. The only other imaging device which has been successfully employed is the simplest of all, the pinhole camera. Pinhole cameras with resolutions better than 10−3 rad are easily constructed, but the apertures are very small—not greater than about 10−4 cm2. The new instrument described here is closely related to the pinhole camera and may be viewed as an attempt to overcome the aperture restrictions of this simple device.read more
Citations
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Journal ArticleDOI
Massively parallel X-ray holography
Stefano Marchesini,Stefano Marchesini,Sébastien Boutet,Sébastien Boutet,Anne Sakdinawat,Michael J. Bogan,Saša Bajt,Anton Barty,Henry N. Chapman,Matthias Frank,Stefan P. Hau-Riege,Abraham Szöke,C. Cui,David A. Shapiro,Malcolm R. Howells,John C. H. Spence,Joshua W. Shaevitz,Joanna Y. Lee,Janos Hajdu,Janos Hajdu,M. Marvin Seibert +20 more
TL;DR: In this paper, a uniformly redundant array placed next to the sample, multiplies the efficiency of X-ray Fourier transform holography by more than three orders of magnitude, approaching that of a perfect lens, and provides holographic images with both amplitude and phase contrast information.
Journal ArticleDOI
Energetic neutral atom imaging of space plasmas
TL;DR: In this paper, experimental techniques and instrumentation for space plasma imaging in fluxes of ENAs are reviewed, and a brief history of ENA experimental studies and their properties is presented.
Journal ArticleDOI
Coded-aperture imaging systems: Past, present and future development - A review
TL;DR: In this paper, the suitability of coded-apertures for neutron imaging in nuclear decommissioning is also assessed using Monte-Carlo modelling, highlighting potential improvements for coded-APerture based neutron source localisation.
Journal ArticleDOI
Recent advances in self-interference incoherent digital holography
Joseph Rosen,Anand Vijayakumar,Manoj Kumar,Mani Ratnam Rai,Roy Kelner,Yuval Kashter,Angika Bulbul,Saswata Mukherjee +7 more
TL;DR: In this paper, the authors survey the main milestones in the topic of self-interference incoherent digital holography from two main points of view, and discuss some of the key applications of these recorders in general, and for 3D super-resolution imaging, fluorescence microscopy, partial aperture imaging, seeing through a scattering medium, and spectral imaging in particular.
References
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Journal ArticleDOI
An introduction to matched filters
TL;DR: In a tutorial exposition, the following topics are discussed: definition of a matched filter; where matched filters arise; properties of matched filters; matched-filter synthesis and signal specification; some forms of matched filter.
Journal ArticleDOI
Optical data processing and filtering systems
TL;DR: The optical implementation of integral transforms which are of importance to communication theory is discussed; the general problems of optical filter synthesis and multichannel computation and data processing are introduced, followed by a discussion of potential applications.