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Related Experiment Videos

Spatial correlation properties of focused partially coherent light.

David G Fischer1, Taco D Visser

  • 1Microgravity Science Division, NASA Glenn Research Center, 21000 Brookpark Road, MS 110-3 Cleveland, Ohio 44135, USA.

Journal of the Optical Society of America. A, Optics, Image Science, and Vision
|November 13, 2004
PubMed
Summary

We studied spatial coherence in focused, partially coherent light. The focal region

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Area of Science:

  • Optics and Photonics
  • Wave Phenomena

Background:

  • Understanding spatial coherence is crucial for applications in imaging and microscopy.
  • Partially coherent light sources are common in various optical systems.

Purpose of the Study:

  • To investigate the spatial coherence properties in the focal region of a converging, partially coherent wave field.
  • To analyze how coherence length affects focal region characteristics.

Main Methods:

  • Theoretical analysis of a converging, spatially partially coherent wave field.
  • Examination of the focal region's intensity distribution and coherence properties.

Main Results:

  • Longitudinal and transverse coherence lengths can be larger or smaller than the intensity distribution width.

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  • The correlation function exhibits phase singularities.
  • Results depend on the effective coherence length of the field in the aperture.

    • Conclusions:

    • Spatial coherence significantly influences the characteristics of the focal region.
    • Phase singularities in the correlation function are a key feature.
    • Control over coherence length offers potential for tailoring focal properties.