Optical choppers with high speed rotating elements

Virgil-Florin Duma; Dorin Demian; Octavian Cira

doi:10.1117/12.2051828

1 May 2014 Optical choppers with high speed rotating elements

Virgil-Florin Duma, Dorin Demian, Octavian Cira

Proceedings Volume 9131, Optical Modelling and Design III; 91310E (2014) https://doi.org/10.1117/12.2051828
Event: SPIE Photonics Europe, 2014, Brussels, Belgium

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.

Citation Download Citation

Virgil-Florin Duma, Dorin Demian, and Octavian Cira "Optical choppers with high speed rotating elements", Proc. SPIE 9131, Optical Modelling and Design III, 91310E (1 May 2014); https://doi.org/10.1117/12.2051828

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