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Related Concept Videos

X-ray Imaging01:24

X-ray Imaging

German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with X-rays, and by 1900, X-ray was widely...
Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.
Confocal Fluorescence Microscopy01:16

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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...

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Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
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Published on: July 5, 2016

High-resolution X-ray lensless imaging by differential holographic encoding.

Diling Zhu1, Manuel Guizar-Sicairos, Benny Wu

  • 1Department of Applied Physics, Stanford University, Stanford, California, USA. dlzhu@stanford.edu

Physical Review Letters
|September 28, 2010
PubMed
Summary

We developed a new soft x-ray imaging method using differential holographic encoding. This technique achieves 16 nm resolution, surpassing existing methods while remaining simple and maintaining signal quality.

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Area of Science:

  • Soft X-ray Microscopy
  • Holographic Imaging
  • Nanoscale Imaging

Background:

  • High-resolution imaging is crucial for understanding nanoscale phenomena.
  • Existing lensless imaging techniques like X-ray Fourier Transform Holography have limitations in resolution or complexity.
  • Advances in soft x-ray microscopy are needed for detailed material and biological studies.

Purpose of the Study:

  • To introduce a novel lensless imaging technique in the soft x-ray regime.
  • To demonstrate superior resolution compared to existing methods.
  • To maintain signal-to-noise ratio and algorithmic simplicity.

Main Methods:

  • Development of differential holographic encoding for soft x-ray imaging.
  • Image synthesis in the Fourier domain from a single diffraction pattern.
  • Resolution enhancement beyond the reference fabrication limit.

Main Results:

  • Achieved a resolution of 16 nm in the soft x-ray regime.
  • Demonstrated superior resolution compared to X-ray Fourier Transform Holography.
  • Maintained high signal-to-noise ratio and algorithmic simplicity.

Conclusions:

  • Differential holographic encoding is a powerful technique for high-resolution lensless imaging.
  • This method offers significant advantages over current state-of-the-art techniques.
  • The technique enables nanoscale imaging with unprecedented detail and simplicity.