Double-exposure specklegrams obtained by using scaled aperture pupils

Luciano Angel; Myrian C. Tebaldi; Marcelo Trivi; Nestor A. Bolognini

doi:10.1117/12.437233

14 August 2001 Double-exposure specklegrams obtained by using scaled aperture pupils

Luciano Angel, Myrian C. Tebaldi, Marcelo Trivi, Nestor A. Bolognini

Proceedings Volume 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications; (2001) https://doi.org/10.1117/12.437233
Event: IV Iberoamerican Meeting of Optics and the VII Latin American Meeting of Optics, Lasers and Their Applications, 2001, Tandil, Argentina

Abstract

In speckle photography the pupil aperture is usually not modified between exposures. In our work, the change of the pupil aperture scale between exposures is analyzed on the basis of double-exposed image speckle, before and after a diffuse in-plane displacement is done. The apertures have the same shape but its scale is modified between exposures. Note that the relative position of the aperture is maintained. In particular, we analyze a simple case that uses a circular aperture whose diameter is modified for recording each image. The intensity in the image plane and the fringe visibility are evaluated, in terms of the geometric characteristics of the pupils.

Citation Download Citation

Luciano Angel, Myrian C. Tebaldi, Marcelo Trivi, and Nestor A. Bolognini "Double-exposure specklegrams obtained by using scaled aperture pupils", Proc. SPIE 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications, (14 August 2001); https://doi.org/10.1117/12.437233

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KEYWORDS

Visibility

Speckle

Diffraction

Photography

Diffusers

Collimation

Interferometry

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