
There are many low cost artificial
regulated light sources for spectral range from 400nm to 1100nm (visible and
near infrared range). There are on the market very few
calibrated light sources of precisely known spectrum and photometric
parameters. Even among this elite light sources for metrological
applications the light sources offered by Inframet are special due to several
features.
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The DAL light source is the first
commercially available multi-channel calibrated light source of regulated
spectrum and extremely wide dynamic exceeding over 10 000 000. Both bright
day and very dark night can be simulated.
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The source
can work typically in three different modes. Mode one: halogen bulb as a
polychromatic light source for the spectral range 0.4-1.1
mm. Mode two: white LED as a source of
polychromatic light source at spectral range 0.4-0.7
mm. Mode three: monochromatic LED
emitting light at 595 nm. Additional LED sources of different spectral ranges
can be optionally added or LED wavelenghth can be changed. Version when only
halogen mode is active is also avaialable.
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Intensity of the polychromatic light source (calibrated
halogen bulb) is regulated using an opto-mechanical attenuator that changes
light intensity but does not change light color temperature. Intensity of the
LED sources is regulated electronically using advanced
electronic regulation/stabilisation system. Luminance level at the output port
is shown on a digital display.
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Compact,
portable design. DAL light source can be easily integrated
with both laboratory or field test systems.
The DAL light source can be used as a standard source of visible and near
infrared radiation to simulate day level and night level conditions in systems
for testing visible imagers (color CCD cameras, monochrome CCD cameras, ICCD
cameras, night vision devices)
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Fig. 1. Block diagram of DAL light source |
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Fig.2. Block diagram of DAL light source |
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