Translation of "Kaustik" in English

The second is the caustics.

The optimization of the caustic can be carried out for example as follows:

The LD boundary is generated in accordance with the invention exclusively by a caustic.

Following the introductory explanations, the caustic corresponds to the depth of field range.

A caustic (an area with minimum light diameter) is formed at the focal point of the illumination optics.

An enlarged illustration of the caustic about the image point O? is illustrated in FIG. 9 b .

Physically correct materials and lighting allow you to make true design decisions with global illumination – including caustics.

Alongside the beam profile, the complete caustics and beam quality (M2) can also be measured.

As I worked to balance the blues and the pinks, the caustics dancing on the jellyfish bells, the undulating fog beams, something promising began to appear.

A field diaphragm (not shown) is arranged in or near the entry image plane, and limits the extent of the caustic; its diameter of opening is chosen so that the recording surface of the detector is completely illuminated.

The reasonable dimension of the regions (19a-19g) perpendicular to the energy-dispersive direction depends on the extent of the caustic, and amounts to between 0.1 and 0.15 mm.

Especially for sensitive processes minimal deviations in the important laser beam parameters like power, focus position, beam diameter, beam shape (caustics) or intensity distribution can be decisive for the production yield.

The enlarged caustic in accordance with FIG. 10 b demonstrates a virtually corrected coma, since the main beam 38 and the edge beams 39 intersect at the image point O?.

Accordingly, the laser can generate a laser beam with predetermined beam properties, in particular an appropriate divergence, a predetermined intensity distribution and a predetermined caustic.

With this “depth of field” in the area of the smallest diameter of the caustic along the propagation direction of the beam, the described effects can be achieved in the previously mentioned welding applications.

Caustic 602 is understood, as shown in FIG. 12, the more or less narrow constriction of a beam, which restriction arises in lieu of an image point and which beam shows, as a consequence of image errors, the beam emanating from an image point before it diverges again.

In a further step 508, the caustic is computer determined in the range of, for example, ±3 dpt or ±5 dpt about the mean sphere of the far point refraction A R .

The caustic of the laser beam and the focus is provided along an area of the laser beam, so that the annular distribution remains largely preserved in at least an area of the propagation direction of the transformed laser beam.

Unlike conventional laser processing devices, using the present laser device can introduce high intensity power into a rim area of the annular focus of the workpiece. This generates a caustic defined in the focus of the laser beam with an annular intensity distribution, so that material of the workpiece is not heated directly in the center.

This means that the annular intensity distribution of the beam is preserved in a depth of field area in front of and behind the area of the smallest diameter of the caustic.

In some embodiments, a device for laser processing is provided in which an area of the smallest diameter of the caustic along the propagation direction corresponds to the focus produced by a focusing lens system.

In this way, a laser beam is provided with a caustic in the focus which has the ring structure defined using the quotient over a predefined depth of field area.

The filament image W 3, via its outermost delimiting edge W 3 ?, thus contacts the caustic (see further below for more detailed explanations); the reflector 22 or the reflector surface 22 a can be trimmed in the vicinity of the point P 3 without changing the sharpness of the light-dark boundary.