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The electronic structure of the helium atom in the magnetic field regime B = 0âˆ’100a.u. is investigated, using a full configuration interaction approach which is based on a nonlinearly optimizedâ€¦ (More)

We investigate the electronic structure of the helium atom in a magnetic field between B = 0 and B = 100a.u.. The atom is treated as a nonrelativistic system with two interacting electrons and aâ€¦ (More)

- Gregor Esser, Wolfgang Becken, Werner MÃ¼ller, Peter Baumbach, Josep Arasa, Dietmar Uttenweiler
- Journal of the Optical Society of America. Aâ€¦
- 2010

From the literature the calculation of power and astigmatism of a local wavefront after refraction at a given surface is known from the vergence and Coddington equations. For higher-order aberrationsâ€¦ (More)

[Spectacle lenses in sports: optimization of the imaging properties based on physiological aspects].

- Wolfgang Becken, Anne Seidemann, Helmut Altheimer, Gregor Esser, Dietmar Uttenweiler
- Zeitschrift fur medizinische Physik
- 2007

The goal of correction spectacles is to create a sharp image on the retina by the combined optical system of the eye and the spectacle lens for a given ametropia. As a matter of principle, in thisâ€¦ (More)

The electronic structure of the helium atom in the magnetic field regime B = 0âˆ’100a.u. is investigated, using a full configuration interaction approach which is based on a nonlinearly optimizedâ€¦ (More)

- Gregor Esser, Wolfgang Becken, Helmut Altheimer, Werner MÃ¼ller
- Journal of the Optical Society of America. Aâ€¦
- 2017

The linear relation between the increase of peripheral astigmatism and the increase of power along an umbilical line was described by Minkwitz and is known as the Minkwitz theorem. However, in manyâ€¦ (More)

- Wolfgang Becken
- 2006

For computing the 2 2Ã— magnification matrix of a spectacle lens in front of an eye, there exist well-established methods in the most cases except for the general case of tilted surfaces. In thisâ€¦ (More)

- Wolfgang Becken, Helmut Altheimer, Gregor Esser, Werner MÃ¼ller, Dietmar Uttenweiler
- Optometry and vision science : officialâ€¦
- 2008

PURPOSE
For appropriate patient management understanding, the problems due to the change of image size in the near magnification matrix of spectacles are important. The purpose here is to derive anâ€¦ (More)

- Gregor Esser, Wolfgang Becken, Werner MÃ¼ller, Peter Baumbach, Josep Arasa, Dietmar Uttenweiler
- Journal of the Optical Society of America. Aâ€¦
- 2011

From the literature the analytical calculation of local power and astigmatism of a wavefront after refraction and propagation is well known; it is, e.g., performed by the Coddington equation forâ€¦ (More)

- Wolfgang Becken, Helmut Altheimer, Gregor Esser, Werner MÃ¼ller, Dietmar Uttenweiler
- Optometry and vision science : officialâ€¦
- 2008

PURPOSE
In every day spectacle use relevant parts of a spectacle lens involve large gaze angles and lie outside the paraxial region. The purpose here is to derive a general equation for the local 2 xâ€¦ (More)