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Proceedings Paper

Optical choppers with high speed rotating elements
Author(s): Virgil-Florin Duma; Dorin Demian; Octavian Cira
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Paper Abstract

Choppers are optomechatronic devices used for the modulation of light: to attenuate or eliminate certain wavelength ranges or to generate series of laser impulses with different profiles. We have previously made a detailed study on choppers with rotating wheels with different configurations (with windows with linear and with non-linear margins) – and for different types of laser beams (i.e., top-hat, Gaussian and Bessel). In this paper we report a novel configuration of optical choppers with fast rotating elements (patent pending). The possible configurations of the device are discussed, and several chopper types are presented. The modulation functions of one of the types of choppers newly introduced (i.e., the functions of the transmitted flux) are deduced and studied with regard to the geometry of the device. Comparison with other types of choppers – classical and eclipse (the latter introduced by us) – are being made. Aspects like chop frequency, attenuation coefficient, and profile of the light impulses transmitted by the device are taken into account.

Paper Details

Date Published: 1 May 2014
PDF: 8 pages
Proc. SPIE 9131, Optical Modelling and Design III, 91310E (1 May 2014); doi: 10.1117/12.2051828
Show Author Affiliations
Virgil-Florin Duma, Aurel Vlaicu Univ. of Arad (Romania)
West Univ. of Timisoara (Romania)
Dorin Demian, Aurel Vlaicu Univ. of Arad (Romania)
Octavian Cira, Aurel Vlaicu Univ. of Arad (Romania)

Published in SPIE Proceedings Vol. 9131:
Optical Modelling and Design III
Frank Wyrowski; John T. Sheridan; Jani Tervo; Youri Meuret, Editor(s)

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