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Proceedings Paper

Classical and eclipse optical choppers
Author(s): Virgil-Florin Duma
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Paper Abstract

The paper presents some of our advances in the study and development of optical choppers. The modulation functions we have studied for classical choppers are pointed out – for top-hat (constant intensity) light beam distributions. The eclipse choppers that, to the best of our knowledge we have introduced are also presented. We thus point out the differences between the profiles of light (laser) impulses produced by the classical devices (with rotating wheels with windows with linear edges) and the novel eclipse choppers – under patent (with windows with circular edges that produce for the circular-shaped section of the laser beam in the plane of the wheel a planetary eclipse-like effect – from which the name we have proposed for this type of device). The most convenient (from the technological and from the cost point of view) solution, with wheels with circular holes is also obtained. The advantages and the drawbacks of the various devices are discussed. Both a theoretical and an experimental approach are considered. The latter is done on a chopper module we have constructed, with prototype chopper wheels we have designed and manufactured. Throughout the study, top-hat laser beams are considered, as they are most used in laser manufacturing applications. The perspective of conducting the study on other light beams distributions (e.g., Gaussian) is also pointed out.

Paper Details

Date Published: 11 March 2013
PDF: 9 pages
Proc. SPIE 8621, Optical Components and Materials X, 862119 (11 March 2013); doi: 10.1117/12.2003122
Show Author Affiliations
Virgil-Florin Duma, Aurel Vlaicu Univ. of Arad (Romania)

Published in SPIE Proceedings Vol. 8621:
Optical Components and Materials X
Michel J. F. Digonnet; Shibin Jiang; J. Christopher Dries, Editor(s)

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