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Abstrakty
This article presents a new optical set-up for illumination of a common area with a few independent light sources. The main aim is to create a uniform light distribution of a constant shape even if one of the light sources will stop working. In such a case, the shape of the light distribution should remain unchanged, however, the total light intensity will be lower. The novelty of the proposed solution is based on the usage of a small number of the independent light sources in opposite to a well known LED arrays approach. The beam shaping is made using Dammann gratings and specially designed blazed phase diffractive gratings. The article contains the theoretical analysis and the computer simulation verified by the experiment.
Słowa kluczowe
Wydawca
Czasopismo
Rocznik
Tom
Strony
189--192
Opis fizyczny
Bibliogr. 17 poz., il., wykr.
Twórcy
autor
autor
autor
autor
autor
autor
- Faculty of Physics, Warsaw University of Technology, 75 Koszykowa Str., 00-662 Warsaw, Poland, artur.sobczyk@if.pw.edu.pl
Bibliografia
- [1] I. Moreno, M. Avendańo-Alejo, and R.I. Tzonchev: Designing light-emitting diode arrays for uniform near-field irradiance. Appl. Optics 45, 2265-2272, 2006.
- [2] I. Moreno, C.C. Sun, and R. Ivanov: Far-field condition for light-emitting diode arrays. Appl. Optics 48, 1190-1197, 2009.
- [3] I. Moreno, J. Muńoz, and R. Ivanov: Uniform illumination of distant targets using a spherical light-emitting diode array. Opt. Eng. 46, 033001, 2007.
- [4] X. Deng, X. Liang, Z. Chen, W. Yu, and R. Ma: Uniform illumination of large targets using a lens array. Appl. Optics 25, 377-381, 1986.
- [5] H. Dammann and E. Klotz: Coherent optical generation and inspection of two-dimensional periodic structures. Opt. Acta 24, 505-515 119772, 1977.
- [6] M. Bass, Handbook of Optics, edited by M. Bass, 2nd Edition, Mc Graw-Hill, New York, 1995.
- [7] C. Zhou and L. Liu: Numerical study of Dammann array illuminators. Appl. Optics 34, 5961-5969, 1995.
- [8] J.N. Mait: Design of binary-phase and multiphase Fourier gratings for array generation. J. Opt. Soc. Am. A7, 1514-1528, 1990.
- [9] S.J. Walker and J. Jahns: Array generation with multilevel phase gratings. J. Opt. Soc. Am. A7, 1509-1513, 1990.
- [10] S. Zhao, C. Zhou, P. Xi, H. Wang, and L. Liu: Number of phase levels in a two-dimensional separable Talbot array illuminator. J. Opt. Soc. Am. A18, 103-107, 2001.
- [11] J.N. Mait: Design of Dammann gratings for two-dimensional, nonseparable, noncentrosymmetric responses. Opt. Lett. 14, 196-198, 1989.
- [12] J.N. Mait: Design of binary-phase and multiphase Fourier gratings for array generation. J. Opt. Soc. Am. A7, 1514-1528, 1990.
- [13] A. Vasara, M.R. Taghizadeh, J. Turunen, J. Westerholm, E. Noponen, H. Ichikawa, J.M. Miller, T. Jaakkola, and S. Kuisma: Binary surface-relief gratings for array illumination in digital optics. Appl. Optics 31, 3320-3336, 1992.
- [14] C. Wang, C. Du, L. Pan, and Q. Liu: Design and fabrication of two-dimensional nonseparable Dammann gratings. Proc. SPIE 5636, 538, 2005.
- [15] M. Sypek: Light propagation in the Fresnel region. New numerical approach. Opt. Commun. 116, 43, 1995.
- [16] M. Sypek, C. Prokopowicz, and M. Górecki: Image multiplying and high frequency oscillations effects in the Fresnel region light propagation simulation. Opt. Eng. 42, 3158, 2003.
- [17] I. Banyasz: Refractive index modulation vs. before-bleach optical density modulation characteristics of silver halide phase holograms. Opt. Commun. 244, 79-91, 2005.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BWAD-0022-0010