
Proceedings Paper
Generation of super long dark channel using annular multi-Gaussian beamFormat | Member Price | Non-Member Price |
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Paper Abstract
According to Vector diffraction theory, focusing properties of azimuthally polarized annular multi Gaussian beam
through dielectric interface is numerically studied. It is observed that the presence of dielectric interface generates focal
shift and the inclusion of annular obstruction at the aperture enhances the focal depth and minimized the focal hole size.
By properly tuning the annular obstruction, a focal hole of FWHM 0.606 λ having super long focal depth of 3080λ is
achieved. The focal depth of the dark channel achieved is found to be much larger than all the previously proposed
methods.
Paper Details
Date Published: 15 June 2015
PDF: 5 pages
Proc. SPIE 9654, International Conference on Optics and Photonics 2015, 965429 (15 June 2015); doi: 10.1117/12.2181762
Published in SPIE Proceedings Vol. 9654:
International Conference on Optics and Photonics 2015
Kallol Bhattacharya, Editor(s)
PDF: 5 pages
Proc. SPIE 9654, International Conference on Optics and Photonics 2015, 965429 (15 June 2015); doi: 10.1117/12.2181762
Show Author Affiliations
M. Lavanya, PSGR Krishnammal College for Women (India)
M. Udhayakumar, Chikkanna Government Arts College (India)
M. Udhayakumar, Chikkanna Government Arts College (India)
S. Shanmugapriya, PSGR Krishnammal College for Women (India)
K. B. Rajesh, Chikkanna Government Arts College (India)
K. B. Rajesh, Chikkanna Government Arts College (India)
Published in SPIE Proceedings Vol. 9654:
International Conference on Optics and Photonics 2015
Kallol Bhattacharya, Editor(s)
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