This is how it's done:

From a set of original lamps, for every type the averages and standard deviation of the (x,y,z)-position are determined for the pre-alignment. Each lamp has to meet this desired value within half a standard deviation.

In addition, the electronic data and the basic line stability of each lamp are checked. From each batch a number of samples were randomly chosen and tested in an original instrument for impeccable function.

During the pre-alignment the individual spectrum of the lamp is recorded by a PC via a diodearray-monochromat or with fibre optics made by Carl Zeiss. The pre-alignment accuracy is around 20µm.

This is achieved by setting the maximum intensity while the lamps' aperture is exactly displayed on a slit above the best depth of field range of an optical lens, and by the x,y,z-adjustment through micrometer screws.

The individual spectrum is saved with a serial number and/or an order number. Together with their lamp the customers receive a plot about the intensity spectrum.

In addition, the lamp is equipped with a timer that is calibrated for 2000 running hours.

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