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Figure 13 a shows a typical warm-up curve.
During the warm-up, the lamp spectrum, the focal spot size, and other optical characteristics do not change noticeably. The voltage required to trigger the lamp varies with the time over which the voltage is applied.
The shorter the time, the higher the voltage required for breakdown. The boost phase of ignition widens the narrow discharge streamer generated in the trigger phase.
By depositing more energy in the streamer, the boost drives the impedance of the arc until it is sufficiently low for the DC phase of the ignition to take over.
The aim is to drive the lamp to the positive portion of the V-I curve. Figure 14 shows a lamp ignition circuit graph, including the boost and the trigger.
Quantity of Light, Light Distribution, and Color Temperature Light color Figure 15 shows the 1931 CIE chromaticity diagram that is usually used to describe the color characteristics of lamps. The locus of color coordinates are represented by a curved line near the center of Figure 15 a, and the color temperatures are represented by numbers along the curved line 3,500,800,500, etc.
Figure 15 b is a magnified image of the curved line. The average XY color coordinates of xenon lamps are 0. By plotting the x- and y-coordinates on Figure 15 b, one can see how remarkably close the source lamp color is to that of an ideal blackbody at 6,150 K.
After the quantity of light was adjusted to the maximum output, a fiber optic was connected to the output.
It was then possible to measure these values using a chroma meter. As shown in Figure 16, the luminance was over 5. Excitation Output Power Figure 20-22 illustrate the excitation light output power from the filter, measured using a laser power meter 3 W, Ophir located 2 cm from the filter.
These figures show a stable and constant output power without fluctuation for each wavelength. Iris Output Control The iris diaphragm diameter, which is controlled by the servo motor from the front panel, adjusts the output power and lights.
Figure 23-25 below show the minimum to maximum diaphragm diameter and step motor rotation that produce the output power. These figures show the linearity of the output power according to the step motor degree and the iris diameter for each wavelength.
In the Figure 26, light outputs for each central wavelength of white light, 450 nm, 530 nm, and 632.
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