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Related Concept Videos

Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
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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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Related Experiment Video

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Single Plane Illumination Module and Micro-capillary Approach for a Wide-field Microscope
08:53

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Published on: August 15, 2014

Practical implementation of log-scale active illumination microscopy.

Kengyeh K Chu1, Daryl Lim, Jerome Mertz

  • 1Boston University, Department of Biomedical Engineering 44 Cummington St., Boston, MA, 02215 kenchu@bu.edu http://biomicroscopy.bu.edu.

Biomedical Optics Express
|January 25, 2011
PubMed
Summary
This summary is machine-generated.

Active illumination microscopy (AIM) enhances scanning microscopes by using real-time feedback to control light, improving image quality. This integrated instrument reconstructs images logarithmically for better dynamic range, especially in two-photon microscopy.

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Area of Science:

  • Microscopy
  • Optical Imaging
  • Biophysics

Background:

  • Scanning microscopy faces dynamic range limitations.
  • Real-time feedback control is crucial for advanced imaging.
  • Two-photon microscopy offers deep tissue penetration but requires optimized dynamic range.

Purpose of the Study:

  • To introduce and demonstrate an integrated instrument for Active Illumination Microscopy (AIM).
  • To improve dynamic range management in scanning microscopy.
  • To analyze the impact of noise on AIM feedback control.

Main Methods:

  • Developed a fully integrated instrument for AIM.
  • Implemented real-time feedback control of illumination power on a sub-pixel timescale.
  • Reconstructed images on a logarithmic scale.
  • Performed theoretical and computational analysis of noise influence.

Main Results:

  • Demonstrated successful integration of feedback and image reconstruction.
  • Achieved enhanced dynamic range in a single output channel.
  • Presented imaging examples showcasing AIM benefits.
  • Analyzed noise effects on feedback performance.

Conclusions:

  • AIM effectively redistributes dynamic range in scanning microscopes.
  • The integrated instrument provides a robust platform for AIM.
  • Logarithmic image reconstruction is key to leveraging AIM's dynamic range benefits.
  • AIM shows significant promise for applications in two-photon microscopy.