Колобродов В. Г. , Микитенко В. І., Сірий Є. А., Інфрачервона гібридна лінза з виправленою сферичною аберацією // Наукові вісті НТУУ "КПІ". - 2013. - №6, т. 92 - С. 78-81.

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. To increase the diffractive efficiency of the calculated lens to the required value, we propose to change the obtained designing parameters of the diffractive part. We show that the increase of diffractive efficiency of the hybrid lens enables the rise of spherical aberration, but the spherical aberration value of the hybrid lens is always less than that of the refractive one.