Light Microbeams by Tapered Glass Capillaries for Biological Irradiation


Microbeams of visible light were studied using a tapered glass capillary. Transmittance of laser light through capillaries with different inlet and outlet diameters was measured. About several % of the transmittance was obtained and larger than 80% was achieved in combining with an optical lens. It was found that the obtained transmittance considerably depended on the capillary shape, i.e., the taper angle. Density enhancement of the extracted beam was derived and showed a strong focusing ability for the tapered glass capillary. Propagation of visible light through the capillary was discussed.

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Jin, W. , Katoh, K. , Minowa, T. and Ikeda, T. (2013) Light Microbeams by Tapered Glass Capillaries for Biological Irradiation. Journal of Computer and Communications, 1, 5-8. doi: 10.4236/jcc.2013.17002.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] T. Nebiki, T. Yamamoto, T. Narusawa, M. B. H. Breese, E. J. Teo and F. Watt, “Focusing of MeV Ion Beams by Means of Tapered Glass Capillary Optics,” Journal of Vacuum Science & Technology A, Vol. 21, No. 5, 2003, pp. 1671-1674.
[2] T. Ikeda, Y. Kanai, T. M. Kojima, Y. Iwai, T. Kambara, T. Yamazaki, M. Hoshino, T. Nebiki and T. Narusawa “Production of a Microbeam of Slow Highly Charged Ions with a Tapered Glass Capillary,” Applied Physics Letters, Vol. 89, No. 16, 2006, Article ID: 163502.
[3] A. Cassimi, T. Ikeda, L. Maunoury, C. L. Zhou, S. Guillous, A. Mery, H. Lebius, A. Benyagoub, C. Grygiel, H. Khemliche, P. Roncin, H. Merabet and J. A. Tanis, “Dynamics of Charge Evolution in Glass Capillaries for 230-keV Xe23+ Ions,” Physical Review A, Vol. 86, No. 6, 2012, Article ID: 062902.
[4] T. Ikeda, Y. Kanai, Y. Iwai, T. M. Kojima, K. Maeshima, W. Meissl, T. Kobayashi, T. Nebiki, S. Miyamoto, G. P. Pokhil, T. Narusawa, N. Imamoto and T. Yamazaki, “Glass Capillary Optics for Producing Nanometer Sized Beams and Its Applications,” Surface & Coatings Technology, Vol. 206, No. 5, 2011, pp. 859-863.
[5] E. Hecht, “Optics,” 4th Edition, Addison-Wesley, San Francisco, 2001.

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