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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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Related Experiment Video

Updated: Jun 26, 2026

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Multiple reflection Michelson interferometer with picometer resolution.

Marco Pisani1

  • 1Istituto Nazionale di Ricerca Metrologica, INRiM, Strada delle Cacce, 73, 10135 Torino, Italy. m.pisani@inrim.it

Optics Express
|December 24, 2008
PubMed
Summary
This summary is machine-generated.

This study introduces a Michelson interferometer that enhances measurement resolution by multiplying the optical path length using multiple reflections. This technique significantly boosts precision, overcoming limitations in interferometric measurements.

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Area of Science:

  • Optics and Photonics
  • Metrology

Background:

  • Classical interferometers face limitations in resolution due to fringe nonlinearities and quantum noise.
  • Enhancing the optical path length is crucial for improving measurement precision.

Purpose of the Study:

  • To develop a modified Michelson interferometer capable of multiplying the optical path length.
  • To demonstrate a significant increase in measurement resolution using this novel setup.

Main Methods:

  • Utilizing a Michelson interferometer configuration with multiple reflections between two plane mirrors.
  • Implementing a simple optical setup to achieve path multiplication.

Main Results:

  • Achieved a multiplication factor of the optical path length by a factor N.
  • Demonstrated a resolution increase of almost two orders of magnitude with a simple setup.

Conclusions:

  • The developed technique effectively multiplies the optical path, significantly enhancing interferometric measurement resolution.
  • This method offers a viable solution for overcoming classical interferometer limitations in various applications.