Sentence examples for shift of the focal from inspiring English sources

The objective lenses used in cameras may contain from two to 10 elements, while a so-called zoom or variable-focal length lens may have as many as 18 or 20 elements in several groups, the different groups being movable along the axis by levers or cams in order to produce the desired change in focal length without a shift of the focal plane.

Stepwise shifting of the focal plane allows the intracrystal activity distribution throughout the whole crystal volume to be observed.

By modulating the laser beam divergence we were able to induce precise axial shifts of the focal spot.

For functional 3D imaging, we combined repeated axial shifting of the focal spot either with 2D frame imaging or high-speed random access pattern scanning (RAPS) [ 5] employing the AOD scanner based microscope (Fig. 4b).

The ETL in combination with the f = −100 mm offset lens and the optimized driving signal thus allows fast, reliable axial shifting of the focal spot to image different optical planes along the optical axes, as shown in Media 3, depicting rapid switching between two layers while scanning a group of pollen grains.

The results obtained by electrochemical measurements show the same low hydrodynamic activity in the transducer vicinity, the same shift of the active focal toward the transducer, and the same absence of activity in the post-focal axial zone.

This LA results in not only the axial extension of the focus but also the shifting of the pseudo focal plane as discussed below.

One approach is to reduce the add power of MIOLs to shift the focal point closer to an intermediate direction, resulting in a loss of spectacle independence in the near.

A majority of the cells remain in a fixed position, while some migration is seen with cells shifting in and out of the focal plane.

The longitudinal aberration curve of the objective shows that the spherical aberration curves of different wavelength almost intersect in one point at 0.707 apertures, and the focal shift curve of the objective shows that the maximum focal shift of the system is only 99.5 μm.

Although the ZEMAX lens data is not available for the Nikon objective lens, we model the longitudinal magnification of the objective using a simple lens with the same focal length, 5 mm, and then, assuming no chromatic aberration in the objective, remove the chromatic shift associated with that simple lens to estimate the chromatic focal shift of the total lens system.