Translation of "Helligkeitsabfall" in English

The corresponding drop in brightness with Vesta is much more moderate.”

Any monitor will experience brightness decay and color shift after being used for a while.

The star has a mass of 81 percent that of the Sun, a radius 76 percent, and a luminosity of 33 percent.

This would result in a loss of light intensity and a brightness falloff at the edge of condenser pupil 9 .

Vignetting parameter: describes the level of brightness loss that can be expected to the image border.

In the described embodiments, the relative luminous intensity is at least twice as great as for a lens with natural brightness loss (cos**4), due to the structural control of the aperture diaphragm aberration and the introduction of dimensioned distortion.

In the described embodiment, the relative luminous intensity is clearly larger than in a lens with natural brightness loss (cos**4), due to design control of aperture diaphragm distortion and the introduction of a dimensioned distortion.

As a result of the design control of aperture diaphragm aberration and the introduction of a dimensioned distortion, the relative luminous intensity can be at least as great as that in a lens with natural brightness loss (cos**4).

Mostly, however, the relative luminous intensity is clearly increased with respect to the natural brightness loss using the design control of aperture diaphragm aberration and the introduction of dimensioned distortion.

In addition, the reflectance of the beam splitter decreases sharply at the edge of the angular range because of the Brewster effect, particularly for relatively highly reflective glasses, such as BaK4, which are primarily used for inversion prisms in field glasses. This decrease in beam splitter reflectance leads to a drop in brightness.

In the described embodiments, the relative luminous intensity is at least twice as great as for a lens with natural brightness loss (cos**4), due to the structural control of the aperture diaphragm aberration and the introduction of dimensioned distortion.

It is the balance between perfection and character. At open aperture center-weighted auto exposure tends for both lenses in a slight under-exposure, since the brightness decreases towards the edges.

If the brightness level in the bottom left corner region of the screen is reduced to 259 cd/m2, then display can achieve an illumination of 84.4% .

High brightness allows lights to be kept on during lessons, and sealed laser banks prevent dust entry to minimize brightness decay for long-lasting high brightness.

The method according to claim 11, wherein the correction factors (H mul) include an additional component by which a known or assumed brightness decrease of the image sensor in its edge regions is compensated.

The two profile curves make it clear that the decrease in brightness from the centre to the edge of the image is low, which emphasizes the good imaging quality with regard to said characteristic parameter of the lens.

Due to the oblique arrangement of the connecting surface, the cross section of the light that respectively is incident on and emerges from the outer (exposed) entry and exit surfaces is preserved while a continuous reduction or narrowing of the beam cross section toward the center of the prism is achieved, which on the one hand causes the beam offset of the Porro prism to be reduced because the beam cross sections that are narrowed in opposite directions lie closer to one another than in a conventional Porro prism, and on the other hand does not lead to a noteworthy impairment at the conventional installation site of the prism between the lens and the focal point in binoculars or a telescope, but merely to a slight decrease in brightness toward the edge of the image field (“vignetting”).

Although this results in a reduction of the available beam cross section or beam diameter as the light penetrates farther into the Porro prism 1 ?, it merely leads to so-called “vignetting,” i.e., a slight decrease in brightness toward the edge of the image field, at the location in conventional telescopes, binoculars or the like, in which such prisms are used as reversing systems.

This error is clear in particular in images with high in-image contrasts, as the deviation from the pixel-accurate allocation is normally field-dependent (including a drop in brightness towards the edge).

In the total light distribution shown in FIG. 5C, this light/dark border is not depicted, however, because the decrease in luminosity in the light distribution generated by the first branch 12 is compensated for there by the increase in luminosity of the light distribution of FIG. 3 c, generated by the second branch 14 .

Additionally, a compensation of aging effects can be provided by detecting a temporal brightness decrease by a light sensor or a V(?) sensor.

Curve (95) shows consistently higher intensities than curve (96), but the brightness drop in curve (96) is more strongly expressed.

As already mentioned in the introduction, a decrease in brightness is produced in the projected image on account of flawed projection systems, this being a nuisance that is inherent to all optical systems and is well known in photography.

To prevent distortions, color faults, or vignetting—i.e., a brightness drop in the edge regions of an observable field of vision—enormously high demands are placed on the individual optical components.

In the purely mechanical lengthening of the afocal beam path between the components, with increasing change in distance, increasing vignetting also must be taken into account, thus a decrease in brightness from the center of the image field to the edge of the image field or even a cropping at the edge of the image field.

Admittedly, in relation to some illustrated embodiments, two mutually oppositely directed, parallelised light beams with associated light distribution device 14 and 14 ? are illustrated, but it is possible, particularly in the case of less elongate vehicle lamps, to provide only one light beam and one light distribution device, and for the drop in brightness to be compensated by the measures described in relation to FIGS. 3 and 4 for each of the left and right sides thereof or a combination of such measures.