Kuchugura I.O.

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).

Development of Calculation Methods of Diffractive Lenses

The purpose of this paper is to develop the calculation method of diffractive lenses with the given transmittance that allows determining structural parameters of diffractive lenses. To this end, we employ the example of one of the options of lenses transmittance. We show that the lens with the same parameter works as a Fresnel zone plate. In addition, we analyze the intensity distribution generated by this plate was analyzed. We show that with the increase of a focus number the focus intensity decreases, while the highest intensity is observed for the main focus.