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Computed Tomography01:10

Computed Tomography

Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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...
Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...

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Related Experiment Video

Updated: Jul 3, 2026

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
11:34

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

Published on: December 3, 2013

Terabyte recorded in two-photon 3D disk.

Ed Walker1, Alexander Dvornikov, Ken Coblentz

  • 1Call/Recall, Inc., 6160 Lusk Boulevard, Suite C-206, San Diego California, 92121, USA. two_photon_3d@yahoo.com

Applied Optics
|August 2, 2008
PubMed
Summary
This summary is machine-generated.

Researchers achieved 1 Tbyte data storage on a 3D optical disk using advanced materials and a high numerical aperture (NA) lens. This breakthrough paves the way for future high-density storage solutions.

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Related Experiment Videos

Last Updated: Jul 3, 2026

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Published on: December 3, 2013

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07:45

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Area of Science:

  • Materials Science
  • Optical Engineering
  • Data Storage Technologies

Background:

  • Optical data storage density has been limited by conventional methods.
  • Advancements in materials and optics are crucial for increasing storage capacity.

Purpose of the Study:

  • To demonstrate high-density data recording on a 3D optical disk.
  • To evaluate the performance of new recording materials and high numerical aperture (NA) optics.

Main Methods:

  • Utilized a two-photon 3D disk recording technique.
  • Employed a high numerical aperture (NA) objective lens (1.0 NA).
  • Tested novel, highly sensitive materials recordable at 405 nm.

Main Results:

  • Successfully recorded 1 Tbyte of data across 200 layers on a standard 120 mm disk.
  • Achieved high data density with bit energies as low as 250 pJ/bit.
  • Demonstrated reduced bit dimensions using a 405 nm laser diode.

Conclusions:

  • The developed materials and optics enable unprecedented data storage density in a standard form factor.
  • Future storage capacities of 5 Tbyte per disk are feasible with further material and recording optimization.
  • This technology represents a significant advancement in high-capacity optical data storage.