Mykytenko V.I.

Improvement of Calculating Medical Thermovision Camera Minimum Resolvable Temperature Difference

The paper is devoted to improvement of the equation for calculating the minimum resolvable temperature difference (MRTD) of medical thermovision camera by means of more sophisticated models of thermal images visual perception. An MRTD calculating algorithm, which is based on a more reliable approximation of the visual system modulation transfer function by Schultz, is considered. We obtain new expression for the bandwidth of Schultz’s approximation, which does not depend on the angular size of the Foucault pattern bar. An improved equation for calculating the MRTD was obtained.

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).

Infrared Hybrid Lenses with Corrected Spherical Aberration

This paper proposes the method of monochromatic lens spherical aberration correction by designing it as a hybrid lens. This method is based on the equation, which allows obtaining designing wavelength and focal distant of the hybrid lens diffractive part. The spherical aberration of the obtained diffractive part is equal to the refractive part of spherical aberration but has an opposite sign within a given clear aperture. Using this method, we calculate the plano-convex germanium hybrid lens with low f-number, which forms perfect spherical wavefront for the operating wavelength.

Investigation of Kinoform Element Chromatism

The paper investigates the chromatic characteristic of the kinoform element in a given spectral range. Based on the well-known chromatism theory we obtain more exact expressions of the chromatic focus shift and the dispersion coefficient. The enhanced chromatism theory determined that the chromatic focus shift and the dispersion coefficient depend not only on a spectral range but also on a Fresnel zone number. Based on the enahnced theory we analyze the kinoform chromatism in the spectral range of 8–12 µm.

Performance Evaluation for Multichannel Optoelectronic Surveillance Systems (MOESS) with Image Fusion

The article proposes the methodology for performance evaluation of MOESS with image fusion. This methodology combines probability of detection, recognition and identification with image fusion quality metric – targeting task performance. This metric takes into account the image formation process in single channel of MOESS, image fusion and human visual perception. Simulation results are well correlated with subjective tests. The proposed methodology allows matching the best image fusion method for current operating conditions.

The approaches, means and metrological assurance of calibrationof the standard radiators

We consider the approaches and means of calibration of the standard radiators for precision photometric equipment. Moreover, we develop the engineering approaches and recommendations on choosing the primary elements of the equipment.