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1

Hybrid heptafocal intraocular lenses

Sokolowski M., Pniewski J., Brygola R., Kowalczyk-Hernandez M.

Optica Applicata

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2015

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Vol. 45, nr 3

285--298

EN

In this paper, hybrid diffractive-refractive multifocal intraocular lenses are proposed, which are intended to provide good visual acuity over a discrete spectrum of object distances most often encountered by patients. The proposed hybrid lenses have seven foci. It is shown that by the appropriate selection of modulation depth of a sinusoidal phase diffractive profile and the period of the sinusoid, sharp vision can be achieved for a set of distances such as 24, 29, 37, 49, 73, 145 cm, and infinity. Theoretical axial and lateral visual point spread functions are computed. An accommodative amplitude equivalent of the eye implanted with a multifocal intraocular lens is introduced and calculated for the proposed heptafocal intraocular lenses.

2

Simple achromatic hybrid lens

Zając M., Nowak J.

Optica Applicata

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2003

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Vol. 33, nr 2-3

285-291

EN

The simplest achromatic hybrid lens consists of a refractive (glass) lens with a diffractive microstructure deposited on one of its surfaces. In such lens the reasonable aberration correction is possible only for very limited aperture and field angles. Better possibilities of aberration correction appear if we split the refractive lens onto two identical parts separated by certain distance and locate the diffractive element between the glass lenses. We show that in a such way it is possible to obtain a hybrid lens of the same or even smaller aberrations for substantially greater aperture and field angles.

3

Hybrid achromatic spectacle lens

Zając M.

Optica Applicata

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2003

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Vol. 33, nr 2-3

273-283

EN

Spectacle lens is a very particular optical imaging element of great practical importance. Although its construction is very simple, some demands are specific (in particular, remarkable shift of an output pupil). A number of classic spectacle lens designs have been known for a long time, however some new possibilities of aberration correction appear if we use a hybrid (diffractive-refractive). Hybrid lens is an optical system composed of a classic refractive (“glass”) lens and a diffractive microstructure deposited on one of its surfaces. Imaging properties of such lens can be expressed in terms of dimensionless parameters: z = -r1/r2 (describing the shape of a refractive part), b = za/zb (describing the geometry of diffraction fringes) and h = FD/FR (describing the distribution of focusing power between a diffractive and refractive part). By a proper choice of the parameter h we can compensate chromatic aberration. Thanks to the other free parameters astigmatism can also be corrected. In this contribution the possibilities of particular Seidel aberration correction of a hybrid lens are presented. As an illustration some examples of spectacle hybrid lenses are shown and their imaging characteristics are compared with imaging characteristics of commercially available refractive lenses.

4

Hybrid lens of optimized aberration correction.

Nowak J.

Optica Applicata

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2000

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Vol. 30, nr 2-3

213-229

EN

A hybrid lens is understood as a glass lens with a diffraction microstructure deposited on one of its spherical surfaces. The imaging properties of such a lens depend above all on the curvature radii of the lens surfaces, topography of diffraction microstructure and both position and size of the entrance pupil. The third order aberrations depend directly on these parameters. By choosing properly the above parameters an achromatic hybrid lens of corrected spherical aberration and selected field aberrations can be designed. The imaging quality of the designed hybrid lens has been illustrated by such characteristics as geometrical aberrations, spot-diagrams, diffraction point spread function and wave aberration).

5

Hybrid apochromatic lens.

Nowak J., Masajda J.

Optica Applicata

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2000

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Vol. 30, nr 2-3

271-275

EN

In the paper, it has been shown that an apochromatic triplet can be designed without employing special glasses. This possibility is offered when an optical system is composed of two lenses, i.e., hybrid and glass ones. Such a system is proposed and its spherochromatic aberration is determined. The aberration characteristic of the system is compared with that of a conventional glass apochromat.