I n t roduc t ion Digital photomicrographers assume that lens aberrations are corrected by the microscope manufacturer and that their instruments are designed for best performance. However, this belief is unwarranted if the specimen is mounted in a medium inappropriate for the objective lens. It is easy to forget that the refractive medium between specimen and objective is critical for maintain...

PURPOSE To report the ocular and corneal higher order aberrations of a pilot trial of optimized prolate ablations for the treatment of myopia. METHODS In this prospective study, patients were treated using optimized prolate ablation or conventional ablation. Five patients underwent bilateral optimized prolate ablation treatment, and nine patients were randomized to receive optimized prolate a...

Adaptive micro-lenses enable the design of very compact optical systems with tunable imaging properties. Conventional adaptive micro-lenses suffer from substantial spherical aberration that compromises the optical performance of the system. Here, we introduce a novel concept of liquid micro-lenses with superior imaging performance that allows for simultaneous and independent tuning of both foca...

In this paper, several innovative designs of magnetic lenses were designed, a bipolar lens with different geometries, where the outer pole arm denoted by symbol (L) was changed. With current density (6 A / m²) and after its design, geometric parameters studied in terms properties, then optical properties aberrations, i.e. coefficient spherical aberration chromatic aberration. Which led to minor...

The attainable specimen resolution is determined by the instrumental resolution limit d(i) and by radiation damage. Solid objects such as metals are primarily damaged by atom displacement resulting from knock-on collisions of the incident electrons with the atomic nuclei. The instrumental resolution improves appreciably by means of aberration correction. To achieve atomic resolution at voltages...

The optical properties of the crystalline lens are determined by its shape and refractive index distribution. However, to date, those properties have not been measured together in the same lens, and therefore their relative contributions to optical aberrations are not fully understood. The shape, the optical path difference, and the focal length of ten porcine lenses (age around 6 months) were ...

It has been established that of all types aberrations following the implantation intraocular lenses, most significant is spherical, inherent in spherical optics various aspects. This paper proposes a method for reducing longitudinal aberration lenses by applying an additional optical layer onto their surface. To reduce aberration, thickness polytetrafluoroethylene (Teflon) was simulated program...

Design of a new aberration corrected Photoemission electron microscope PEEM3 at the Advanced Light Source is outlined. PEEM3 will be installed on an elliptically polarized undulator beamline and will be used for the study of complex materials at high spatial and spectral resolution. The critical components of PEEM3 are the electron mirror aberration corrector and aberration-free magnetic beam s...

Holographic microscopy combined with forward modeling and inference allows colloidal particles to be characterized tracked in three dimensions high precision. However, current models ignore the effects of optical aberrations on hologram formation. We investigate spherical aberration structure single-particle holograms accuracy particle characterization. find that a typical experimental setup, c...

The optimum imaging of an object structure at the sub-angstrom length scale requires precise adjustment of the lens aberrations of a high-resolution instrument up to the fifth order. A least-squares optimization of defocus aberration C1, third-order spherical aberration C3, and fifth-order spherical aberration C5 yields two sets of aberration coefficients for strong phase contrast up to the inf...