Journal
OPTICS COMMUNICATIONS
Volume 282, Issue 4, Pages 465-472Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2008.10.058
Keywords
Coherent optics; Diffraction; Imaging; Optical instruments; Lithography; Microscopy; Holography
Categories
Funding
- Engineering and Physical Sciences Research Council [EP/E023568/1]
- QIP IRC [GR/S82176/01]
- Research Unit 635 of the German Research Foundation
- EU through the research and training network EMALI [MRTN-CT-2006-035369]
- Engineering and Physical Sciences Research Council [EP/E023568/1] Funding Source: researchfish
- EPSRC [EP/E023568/1] Funding Source: UKRI
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When used with coherent light, optical imaging systems are inherently unable to reproduce both the amplitude and the phase of a two-dimensional field distribution. This is because their impulse response function varies slowly from point to point, a property known as non-isoplanatism. For sufficiently small objects. this usually results in a phase distortion and has no impact on the measured intensity. Here, we show that the intensity distribution can be dramatically distorted when extended objects are imaged. We illustrate the problem using two simple examples: the pinhole camera and the thin lens. The effects predicted by Our theoretical analysis are confirmed by experimental observations. (C) 2008 Elsevier B.V. All rights reserved.
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