The use of a regular array of apertures in penumbral imaging

Nugent, Keith A.; Luther‐Davies, Barry

doi:10.1016/0030-4018(85)90229-9

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2017

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Cited by 8 publications

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“…The more elegant solution is given by coded apertures. They usually represent an array of relatively small circular apertures arranged in such a way that the amount of light that reaches the detector is maximized while still allowing for high resolution imaging via signal reconstruction [25,26]. However, the reconstruction step is prohibitively expensive for real-time position measurements.…”

Section: Discussionmentioning

confidence: 99%

On the resolution and linearity of lensless in situ X-ray beam diagnostics using pixelated sensors

Kachatkou¹,

Silfhout²

2013

Opt. Express

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We present a theoretical model that describes the resolution and linearity of a novel transparent X-ray beam imaging and position measurement method. Using a pinhole or coded aperture camera with pixelated area sensors to image a small fraction of radiation scattered by a thin foil placed at oblique angles with respect to the beam, a very precise measurement of the beam position is made. We show that the resolution of the method is determined by incident beam intensity, beam size, camera parameters, sensor pixel size and noise. The model is verified experimentally showing a sub-micrometer resolution over a large linear range.

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Section: Discussionmentioning

confidence: 99%