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3 - Focusing and Self-Imaging

Published online by Cambridge University Press:  27 July 2023

Govind P. Agrawal
Govind P. Agrawal
Affiliation:
University of Rochester, New York
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Summary

The focus of this chapter is on focusing and self-imaging of optical beams occurring in a graded-index rod. Section 3.1 provides a geometrical-optics perspective and shows why optical rays follow a curved path inside a GRIN medium. The modes of such a medium are used in Section 3.2 to find a propagation kernel and use it discuss the phenomenon of self-imaging. Section 3.3 is devoted to studying how a GRIN rod can be used as a flat lens to focus an incoming optical beam. Imaging characteristics of such a lens are also considered in this section. Several important applications of GRIN devices are discussed in Section 3.4.

Keywords

-index lensgraded-index fibermeridional raysself-imagingparabolic index profileparaxial approximationpropagation kernelABCD matrixfocal planemedical imagingendoscope
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Information
Physics and Engineering of Graded-Index Media , pp. 55 - 83
Publisher: Cambridge University Press
Print publication year: 2023

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  • Focusing and Self-Imaging
  • Govind P. Agrawal, University of Rochester, New York
  • Book: Physics and Engineering of Graded-Index Media
  • Online publication: 27 July 2023
  • Chapter DOI: https://doi.org/10.1017/9781009282086.004
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  • Focusing and Self-Imaging
  • Govind P. Agrawal, University of Rochester, New York
  • Book: Physics and Engineering of Graded-Index Media
  • Online publication: 27 July 2023
  • Chapter DOI: https://doi.org/10.1017/9781009282086.004
Available formats
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Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Focusing and Self-Imaging
  • Govind P. Agrawal, University of Rochester, New York
  • Book: Physics and Engineering of Graded-Index Media
  • Online publication: 27 July 2023
  • Chapter DOI: https://doi.org/10.1017/9781009282086.004
Available formats
×