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Reflective grating interferometer: a folded reversal wave-front interferometer.

S De Nicola1, P Ferraro, A Finizio

  • 1Istituto di Cibernetica del Consiglio Nazionale delle Ricerche, Via Toiano 6, I-80072 Arco Felice, NA, Italy. denicola@pentium.cib.na.cnr.it

Applied Optics
|March 8, 2008
PubMed
Summary
This summary is machine-generated.

A new folded reversal interferometer, based on reflective grating, offers advantages for optical isolation and coma aberration testing. This versatile tool enables phase retrieval and lateral shear for advanced optical measurements.

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Area of Science:

  • Optics and Photonics
  • Optical Engineering
  • Interferometry

Background:

  • Existing optical reversal configurations have limitations.
  • Accurate testing of optical aberrations is crucial for performance.
  • Coma aberration affects off-axis optical system imaging quality.

Purpose of the Study:

  • To introduce a novel folded reversal interferometer.
  • To demonstrate its application in optical isolation and coma aberration testing.
  • To highlight its advantages over existing configurations.

Main Methods:

  • Development of a folded reversal interferometer based on a reflective grating.
  • Incorporation of a carrier for phase retrieval in fringe patterns.
  • Addition of lateral shear for transformation into a reversal shearing interferometer.
  • Application for measuring coma aberration in an off-axis parabolic mirror.

Main Results:

  • The new interferometer provides a versatile platform for optical testing.
  • It facilitates easy addition of a carrier for phase retrieval.
  • It can be configured as a reversal shearing interferometer.
  • Successful demonstration of coma aberration measurement for an off-axis parabolic mirror.

Conclusions:

  • The folded reversal interferometer is a valuable tool for optical testing and aberration analysis.
  • Its design offers enhanced flexibility and functionality compared to previous methods.
  • It provides a practical solution for measuring coma aberration in optical systems.