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7 Technical Reference
The following graph shows the normalized spectra of the blue LEDs and the
spectral sensitivity of the radiometer.
Measurements for this light were made using a standard radiometer.
The light output was factory calibrated with the neoBLUE
®
Radiometer to
provide an initial intensity of 35 µW/cm
2
/nm at the high setting and 15
µW/cm
2
/nm at the low setting at a distance of 12 inches (30.5 cm) from the
light enclosure to the baby. This measurement is taken at the central area of
the effective surface area for phototherapy.
The intensity of the light is inversely related to the distance from the light
source to the baby. The light output can be adjusted using the two
potentiometers (located on the side of the light enclosure) to accommodate
different distances.
Because your facility may use a different radiometer to measure the light
intensity output, it is necessary to understand how your reading may differ
from the neoBLUE Radiometer reading. Please refer to the Service Manual
for information on other meters.
0
20
40
60
80
100
380 420 460 500 540
%
N
o
rm
a
liz
e
d
R
esp
o
n
se/
In
ten
si
ty
Wavelength (nm)
Radiometer Response
neoBLUE Intensity
neoBLUE
®
LED Phototherapy System User Manual 17
PN 001364 Rev. I