Design programs for optical chopper wheels with different configurations

Octavian Cira; Virgil-Florin Duma

doi:10.1117/12.2043119

14 January 2014 Design programs for optical chopper wheels with different configurations

Octavian Cira, Virgil-Florin Duma

Proceedings Volume 8925, Fifth International Conference on Lasers in Medicine: Biotechnologies Integrated in Daily Medicine; 89250S (2014) https://doi.org/10.1117/12.2043119
Event: Fifth International Conference on Lasers in Medicine, 2013, Timisoara, Romania

Abstract

Optical choppers are a most used device in laser setups (including in biomedical applications) for generating laser impulses, accurate attenuation, obscuration or elimination of different wavelengths. We present the design programs we are developing for macroscopic optical choppers with rotational wings. We have proposed previously the analysis of different types of chopper wheels with windows: (i) with linear margins (the “classical” device) and (ii) with semicircular margins, inward or outward (the “eclipse” choppers). The latter has been, to the best of our knowledge, of our proposal (patent pending). This rigorous mathematical analysis took into account all the possible relationships between the constructive and kinematics parameters of the device. This theory allowed for developing a design program for each type of choppers – to obtain a specific type of output laser impulse. Examples of applying this program are presented, for each type of laser beams that has been considered so far: top-hat (with constant intensity distribution over the entire beam section), Gaussian and Bessel. A discussion on the laser impulses obtained with each type of device and laser beam concludes the paper.

Citation Download Citation

Octavian Cira and Virgil-Florin Duma "Design programs for optical chopper wheels with different configurations", Proc. SPIE 8925, Fifth International Conference on Lasers in Medicine: Biotechnologies Integrated in Daily Medicine, 89250S (14 January 2014); https://doi.org/10.1117/12.2043119

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