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Spot lens

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(Microscopy) a condensing lens in which the light is confined to an annular pencil by means of a small, round diaphragm (the spot), and used in dark-field illumination; - called also spotted lens.

See also: Spot



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[FIGURE 10 OMITTED] Figure 11 shows a comparison of the predicted and measured weld widths for the 100-[micro]m focal spot lens where the temperature fields were predicted using the distributed heat source model.
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