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Related Concept Videos

Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

One of the distinctive characteristics of circular shafts is their ability to maintain their cross-sectional integrity under torsion. In other words, each cross-section continues to exist as a flat, unaltered entity, simply rotating like a solid, rigid slab. To understand the distribution of shearing stress within such a shaft, consider a cylindrical section inside this circular shaft. This section has a length of L and a radius of R, with one end fixed. The radius of the cylindrical section is...

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Related Experiment Video

Updated: Jun 18, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Optimal dark hole generation via two deformable mirrors with stroke minimization.

Laurent Pueyo1, Jason Kay, N Jeremy Kasdin

  • 1Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA. lpueyo@jpl.nasa.gov

Applied Optics
|November 12, 2009
PubMed
Summary
This summary is machine-generated.

Researchers developed a new algorithm for space-based telescopes to image exoplanets. This method uses two deformable mirrors (DM) to correct optical errors and create a "dark hole" for clearer images.

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Bringing the Visible Universe into Focus with Robo-AO
10:35

Bringing the Visible Universe into Focus with Robo-AO

Published on: February 12, 2013

Related Experiment Videos

Last Updated: Jun 18, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Bringing the Visible Universe into Focus with Robo-AO
10:35

Bringing the Visible Universe into Focus with Robo-AO

Published on: February 12, 2013

Area of Science:

  • Astronomy and astrophysics
  • Optical engineering

Background:

  • Significant growth in research for space-based exoplanet imaging.
  • High contrast imaging is challenging due to optical aberrations.

Purpose of the Study:

  • To review and demonstrate a novel algorithm for high-contrast exoplanet imaging.
  • To minimize deformable mirror (DM) stroke while achieving high contrast.

Main Methods:

  • Utilizing two Boston Micromachines Kilo-DMs in a high-contrast imaging laboratory.
  • Implementing a two-stage algorithm: first DM corrects amplitude aberrations, second DM flattens the pupil wavefront.

Main Results:

  • Demonstrated a symmetric "dark hole" in monochromatic light.
  • Successfully applied the correction algorithm in experimental settings.

Conclusions:

  • The developed algorithm effectively corrects optical aberrations for high-contrast imaging.
  • This approach shows promise for future space-based exoplanet observatories.