Translation of "Optische fehler" in English

A laser beam examines the glass for optical imperfections and records them electronically.

However, other optical errors occur on the surface.

This is reduced by means of subsequent polishing in order to eliminate optical errors.

In this way optical aberrations e.g. in an endoscope can be corrected.

The Wenge wood has small optical mistakes.

These are purely optical errors.

Optical errors of the system, stray light effects, and individual measurement errors are merely eliminated by the various measurements.

Especially, optical faults may occur below the working surface as a result of stresses being released.

They therefore fabricate optical uncertainties, also known as shifting-baseline effect or even Moiré effect.

With special mathematical corrections and algorithms for image processing the optical camber measurement system hotCAM compensates errors of the optic.

With special mathematical corrections and algorithms for image processing the optical position measurement system hotCAM compensates errors of the optic.

Intelligent software independently learns to detect, distinguish between and rate optical defects.

This can also include a surface correction in the viewing zone in order to minimize optical errors.

It is also possible as part of the intrinsic calibration to determine correction functions for optical errors such as aberrations.

Each sheet is checked down to the last detail: Are there any optical defects in the material?

Fitted with exclusive technologies, the systems reliably detect and classify all defects on the glass.

Suitable voltage which cause a deflection of the electron beam probes parallel to the longitudinal direction of the line-shaped multi-hole structures can be applied to the terminal so as to correct optical errors such as, for example, spherical aberrations of the condenser lens, distortion of the imaging optics and so forth.

The desired homogeneity can thus be attained by keeping the single crystal at an elevated temperature for an extended time after its formation so that the mechanical stresses and optical faults are reduced or eliminated by rearrangement of the atoms of the crystal lattice.

For example, reference 1) concerns the investigation of the structure of optical fibers, in particular for localizing optical defects.

Because of the stepless transition in curvature, the curved area can be produced simply and without optical errors through hot bending of flat glass.

The lens O, suggested by the dashed line and positioned in the optical path before the first reflecting surface S1 or after the fourth reflecting surface S4, can be used to correct chromatic defects and/or optical defects of a geometrical nature, e.g., spherical aberration.

In this manner the inaccuracies in the mechanical design of the marks and the scanner, optical errors and rounding off errors can be reduced in the calculation.

FIG. 11 shows that, in addition to the illustrated arrangements according to the invention employing planar or cylindrically curved reflection gratings having strictly periodic grating lines arrangements can easily be realized in which higher order optical errors can be corrected by means of any desired curvatures in the reflection grating having grating lines 70 extending parallel to the X-ray radiation, by deviating from the strict periodicity of grating lines 70 and by freely varying the step angles 71, 72; and special requirements can be met, for example with respect to planeness of the image field.

If the elements disposed in the first optical path, namely the lenses 51 and 52, have optical errors, for example an astigmatism or a field curvature, the bundle of light having the aforementioned errors is passed through the semireflecting mirror 53 into the second optical path in which the aforementioned errors are compensated for since the second optical path which is of identical design to the first optical path also has the same errors, but, due to deflection through the retroreflector 54, in the opposite direction.

By comparing the optical properties—in particular the structurings—of the beam emitted by the additional optical unit and of the test piece beam received by the optical unit, any optical errors in the optical system of the test piece, for example inadequate optical telescope quality, any lens errors, aberrations or distortions and focusing errors, are detected.

The individual light waves are precisely reflected back upon themselves and optical aberrations in the laser medium are not compounded, but almost compensated by reverse propagation of the light waves in the laser medium.

Furthermore one or more lenses made from calcium fluoride can be arranged in a lens system, in order to correct further optical errors, especially polarization effects because of intrinsic birefringence of the optical element or elements made from cubic garnet, cubic spinel, cubic perovskite and/or cubic M(II)- as well as M(IV)-oxides.