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It can be seen from the above that analysis of the laser beam tool by beam diagnostics must primarily be directed at the 4 named beam properties in order to describe or analyse the interaction of the laser beam with the tool during the process, and where applicable identify sources of error.
In laser material processing, this is employed in laser beam cutting or welding, for example. Since the laser beam can do this work virtually without contact, it does not deteriorate during the process as does a drill or milling head. The laser beam is directed by the beam generator (laser device) via beam steering to the processing optics using a mirror or optical fibre technology. The processing optic concentrates the laser beam and focuses it, with focal lengths adjusted to the particular process. The typical properties of the focused laser beam are described by the minimum achievable beam diameter (focus) and the beam caustic. The caustic represents the path of the beam diameter coming from the processing optic to the focus and after it.
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D Abbott · 2002 — An analysis that compares the optical absorption coefficients of GaAs and silicon, shows that GaAs is optically the superior material for use in photodetection ...
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The size of the projected hole image is 3 mm, 3/10 = 0.3, hence the actual diameter of the hole is 0.3 millimetres. ... In order to set exposure times, you have ...
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Oct 10, 2014 — Let me give you an example, on October 25, 2001 Microsoft released Windows XP to the general public. Windows XP contains a partition to house ...
These lenses, designed as multi-element lenses located closest to the specimen, receive light emitted by the specimen. Their primary function is to produce a ...
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Comparator definition: any of various instruments for making comparisons, as of lengths or distances, tints of colors, etc.. See examples of COMPARATOR used ...
• The visibility specification is based entirely on MIL-PRF-13830B. • References the same Military drawing, C7641866, for comparison standards. • In 2017, the ...
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A significant parameter for laser material processing is so-called depth of focus, defined as Rayleigh length. It states the distance from the focus at which the area of the beam cross-section has doubled. If, for example, Rayleigh length and sheet metal thickness are adjusted to each other when laser beam cutting, straight cutting edges can be produced. If the sheet metal thickness is too great, the edges become increasingly more rounded.
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As a tool, the laser beam is characterised by certain properties. Fundamental properties of laser light are its monochromatic nature (one wavelength) and directionality (narrow divergence). In contrast to the beam from a normal light source, laser beams can be very sharply focused. In combination with a laser beam's high power density, a beam of such intensity and limited local focus can be generated that material can be melted or vaporised.
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Magnifying mirrors are detail-oriented. Most IKEA makeup mirrors are two-sided (in a good way!) featuring a regular mirror on one side and a magnifying mirror ...