Wave-front displacement system for vectorial shearing interferometer

Claudio Ramirez; Marija Strojnik; Gonzalo Paez

doi:10.1117/12.679508

7 September 2006 Wave-front displacement system for Vectorial shearing interferometer

Claudio Ramirez, Marija Strojnik, Gonzalo Paez

Proceedings Volume 6307, Unconventional Imaging II; 63070O (2006) https://doi.org/10.1117/12.679508
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

Abstract

The shearing interferometry is an alternative technique for assessment and measurement of wave-front aberrations. The vectorial shearing interferometer uses a displacement system to shear a wave front in vectorial form. We describe the wave-front displacement system incorporating a novel configuration of a pair of wedge prisms. Its main advantage is that the shearing is constant from the displacement system to image plane. The shear direction depends of the relative orientation of the prisms. The magnitude of the shearing is proportional to the distance between prisms. The proportionality constant depends of the wedge angle and the material of the prisms. This constant gives the sensibility to the displacement of the system. We describe and analyze the wave-front propagation through the displacement system using the exact ray trace. The deviation of the shearing by the difference in the wedge angles is larger than the produced by the oblique incidence of the wave front. Finally, we compare experimental results with exact ray trace simulations. We observe that the theoretical data corresponds to the experimental results. There is a maximum rms error of ≈ 10 μm.

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Claudio Ramirez, Marija Strojnik, and Gonzalo Paez "Wave-front displacement system for Vectorial shearing interferometer", Proc. SPIE 6307, Unconventional Imaging II, 63070O (7 September 2006); https://doi.org/10.1117/12.679508

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KEYWORDS

Prisms

Wavefronts

Ray tracing

Shearing interferometers

Refractive index

Cameras

Wave propagation

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