A statistical analysis of diffraction-limited imaging
نویسندگان
چکیده
The Rayleigh criterion is generally regarded as a fundamental limit and due to its practical accuracy in predicting the performance of optical imaging systems, it has unfortunately become accepted as a de-facto physical law. In this work, we will show that this limit is simply a very good rule of thumb, which under proper conditions typically related to the signal-to-noise (SNR) of the sensor, can be overcome. While we will not be discussing specific methodology (e.g. [1]) for improving resolution in this paper, it is the aim of this work to explore how far beyond the Rayleigh limit one can go, and to identify the theoretical limits to such resolution enhancement.
منابع مشابه
Automated Micro-Object Detection for Mobile Diagnostics Using Lens-Free Imaging Technology
Lens-free imaging technology has been extensively used recently for microparticle and biological cell analysis because of its high throughput, low cost, and simple and compact arrangement. However, this technology still lacks a dedicated and automated detection system. In this paper, we describe a custom-developed automated micro-object detection method for a lens-free imaging system. In our pr...
متن کاملDetermination of Optimum Planar Imaging Parameters for Small Structures with Diameters Less Than the Resolution of the Gamma Camera
Introduction: The limited spatial resolution of the gamma camera hinders the absolute quantification of planar images of small structures. The imaged structures are affected by partial volume effects (PVEs), which can spread activity and lead to underestimation of the regional distribution. The use of optimum planar parameters reduces the impact of the limited spatial resolution of the gamma c...
متن کاملImproving seismic image in complex structures by new solving strategies in the CO-CRS and the CO-CDS methods
Conventional seismic imaging possesses problem in exposing structural detail in complex geological media. Nevertheless, some recently introduced methods reduce this ambiguity to some extent, by using data based imaging operator or emancipation from the macro-velocity model. The zero offset common reflection surface (ZO-CRS) stack method is a velocity independent imaging technique which is frequ...
متن کاملEvaluation of Sensory Pathways in Spinal Cord by Comparison of fMRI Methodologies
Introduction: Today, clinicians and neuroscientists need to have a comprehensive survey of neurological pathologies and injuries. For the First-time, SEEP contrast and Spin-Echo pulse sequences was used for functional imaging of the Lumbar spinal cord. This method used by several research groups for Spinal cord mapping, but other researchers tried to improve BOLD fMRI to Spina...
متن کاملSPARCOM: Sparsity Based Super-Resolution Correlation Microscopy
In traditional optical imaging systems, the spatial resolution is limited by the physics of diffraction. The information on sub-wavelength features is carried by evanescent waves, never reaching the camera, thereby posing a hard limit on resolution: the so-called diffraction limit. Modern microscopic methods enable super-resolution, by employing florescence techniques. Stateof-the-art localizat...
متن کاملPosition-sensitive diffractive imaging in STEM by an automated chaining diffraction algorithm.
The diffractive imaging process used for retrieval of an aberration-free exit-wave function of a complex-valued object is optimized with a newly developed automated chaining diffraction (ACD) algorithm. Our algorithm enables automatic recovery of the amplitude and phase of the complex-valued objects with diffraction-limited resolution, starting from selected-area electron diffraction (SAED) pat...
متن کامل