Method for Assessing Modulation Transfer Function of Trifocal Intraocular Lens

The article investigates the quality of images formed by multifocal optical elements. The method for calculating of multifocal diffractive lens modulation transfer function (MTF) at presence of background is proposed. The method is based on a geometric calculation of the intensity of background images and the diffraction efficiency of the main image in each focal plane is considerated. The article has studied the contrast of main images formed by trifocal intraocular lens (IOL). Based on the proposed models of uniform and non-uniform background intensity distributions MTF of given IOL are calculated in each focal plane. It is shown that the main image diffraction efficiency determines a decrease in its contrast at low spatial frequencies with uniform and non-uniform backgrounds. The MTF dependence on the type and background position is analyzed and found that in the case of non-uniform background the main image contrast is slightly higher than for a uniform.

Publication year: 
2014
Issue: 
2
УДК: 
535.42
С. 99–102., Іл. 6. Бібліогр.: 7 назв.
References: 

1. Колобродов В.Г., Тимчик Г.С. Проектування дифракційних оптичних елементів і систем. — К.: НТУУ “КПІ”, 2012. — 196 с.
2. D.C. O’Shea et al., Diffractive Optics: Design, Fabrication, and Test. Washington: SPIE-Press, 2004, 254 p.
3. Micro-optics elements, systems and applications, H.P. Herzig, Ed. UK, London: Taylor and Francis, 1997, p. 359.
4. P.J. Valle et al., “Visual axial PSF of diffractive trifocal lenses”, Optics Express, vol. 13, no. 7, pp. 2782—2792, 2005.
5. D. A. Buralli and G. M. Morris, “Effects of diffraction efficiency on the modulation transfer function of diffractive lenses”, Applied Optics, vol. 31, no. 22, pp. 4389—4386, 1992.
6. F. Castignoles et al., “Comparison of the efficiency, MTF and chromatic properties of four diffractive bifocal intraocular lens designs”, Optics Express, vol. 18, no. 5, pp. 5245—5256, 2010.
7. Колобродов В.Г., Тимчик Г.С. Дифракційна теорія оптичних систем. — К.: НТУУ “КПІ”, 2011. — 148 с.

References [transliteration]: 

1. Kolobrodov V.H., Tymchyk H.S. Proektuvanni͡a dyfrakt͡siĭnykh optychnykh elementiv i system. ‒ K.: NTUU “KPI”, 2012. – 196 s.
2. D.C. O’Shea et al., Diffractive Optics: Design, Fabrication, and Test. Washington: SPIE-Press, 2004, 254 p.
3. Micro-optics elements, systems and applications, H.P. Herzig, Ed. UK, London: Taylor and Francis, 1997, p. 359.
4. P.J. Valle et al., “Visual axial PSF of diffractive trifocal lenses”, Optics Express, vol. 13, no. 7, pp. 2782−2792, 2005.
5. D. A. Buralli and G. M. Morris, “Effects of diffraction efficiency on the modulation transfer function of diffractive lenses”, Applied Optics, vol. 31, no. 22, pp. 4389−4386, 1992.
6. F. Castignoles et al., “Comparison of the efficiency, MTF and chromatic properties of four diffractive bifocal intraocular lens designs”, Optics Express, vol. 18, no. 5, pp. 5245−5256, 2010.
7. Kolobrodov V.H., Tymchyk H.S. Dyfrakt͡siĭna teorii͡a optychnykh system. ‒ K.: NTUU “KPI”, 2011. – 148 s.

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