focal spot


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focal spot

[′fō·kəl ‚spät]
(metallurgy)
In electron-beam or laser welding, the spot where the beam has the highest concentrated energy level.
References in periodicals archive ?
The smaller focal spot diameter allows finer machining, improving the minimum machining diameter to 10 micrometer (micro: 10-6), compared to 50 micrometer with the conventional ABLASER (which uses a green laser).
Higher kV settings (80-150kV) may generate secondary electrons that have the potential to increase the focal spot, thus invalidating prior measurements.
Ku, "Formation of sub-half-wavelength focal spot with ultra long depth of focus," Opt.
The phantom was imaged at 40 kV using the small focal spot size.
The bathroom is another focal spot for electronics, from hair dryers to razors.
The patent pending design makes the most of the optical efficiency of the parabolic reflector by putting the LED within the reflector's focal spot which means that all stray light is redirected and refocused back into the reflector to amplify intensity resulting in the need for fewer LEDs.
A unique reflector design that allows a 39" column of focused light, rather than a single focal spot.
An important role begins played the size of the laser focal spot, size of powder particles, powder layering, thickness and packing density of a deposited layer and the processes of heat transfer in laser-powder interaction zone (Kingskog et al.
Figure 9 shows good agreement between experiments and predictions based on thermal history and DW when using a 100-[micro]m] focal spot lens.
The size of the focal spot can also be controlled by varying certain excitation parameters.
The greatest possibilities for regulation of temperature conditions for formation of ingots in a mold are ensured by electron beam cold hearth remelting (EBCHR) (Figure 1, d) due to size of the heating spot on surface of a metal being heated, so called focal spot [3], and non-inertance of heating by an electron beam.

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