Analysis of Fizeau wedge with a non-air gap by plane wave expansion

Elena Stoykova; Margarita Deneva; Marin Nenchev

doi:10.1117/12.2527464

3 October 2019 Analysis of Fizeau wedge with a non-air gap by plane wave expansion

Elena Stoykova, Margarita Deneva, Marin Nenchev

Proceedings Volume 11207, Fourth International Conference on Applications of Optics and Photonics; 112071V (2019) https://doi.org/10.1117/12.2527464
Event: IV International Conference on Applications of Optics and Photonics (AOP 2019), 2019, Lisbon, Portugal

Abstract

The optical interferential wedge or Fizeau wedge (FW) is a useful optical element with various applications in optical metrology, spectroscopy and laser technique. Various FW applications require knowledge of its response to illumination by a laser beam with an arbitrary wavefront. Recently, we applied the plane wave expansion method to study transmission and reflection of an air-gap FW under illumination with a Gaussian beam. The approach is based on the angular spectrum of the beam and the known FW response to illumination with a plane wave. In this study, we adapt this approach for the more general and more frequently encountered case of a FW with a non-air gap. We developed an approximate algorithm, which is applicable at small incidence angles to wedges with refractive indices different from 1 and illuminating beams with arbitrary amplitude and phase distributions. Comparison to the experiment is also provided.

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Elena Stoykova, Margarita Deneva, and Marin Nenchev "Analysis of Fizeau wedge with a non-air gap by plane wave expansion", Proc. SPIE 11207, Fourth International Conference on Applications of Optics and Photonics, 112071V (3 October 2019); https://doi.org/10.1117/12.2527464

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KEYWORDS

Reflection

Fringe analysis

Reflectivity

Refractive index

Wavefronts

Algorithm development

Collimation

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