Deuterium-Halogen Light Sources: AvaLight-DH

The AvaLight DH-S- Deuterium-Halogen Light Source is a combined Deuterium and halogen light source, which can be used for UV/VIS/NIR applications. The AvaLight-DH-S Deuterium-Halogen Light Source has an SMA905 connector to be used with fiber optic cables and bundles. For optimal coupling an adjustable focus lens assembly is included. The light source supplies a continuous spectrum with high efficiency and highest stability in the UV, visible and near-infrared range from 215-2500 nm.

The Avalight-DH-S Deuterium-Halogen Light Source was developed based on the shine-through principle, in which the halogen light is focused through a small diameter aperture in the deuterium bulb, the new AvaLight-DH-S-BAL (page 60) has a dichroic beam splitter to give a much more balanced spectrum from 200-2500nm.

For UV only applications the AvaLight-DS (only Deuterium) source is available.

The standard AvaLight-D(H)S Deuterium-Halogen light sources have a special UV longpass filter (>220nm) implemented to protect the fibers from solarizing. For applications that require a spectral range below 220 nm a Deep UV bulb is available, in which no UV longpass filter is included. For these Deep-UV measurements (from 190nm) the AvaLight-D(H)S-DUV may be ordered. New is a long-life and more stable version of the Deuterium lamp (AvaLight-D-B-DUV-LL).

For all Deuterium Light Sources solarization resistant fibers (-SR) are recommended, for the DUV lamp special solarization resistant fibers (-SR) are required (see the fiber optic section of this catalog).

The output of the AvaLight-DHS Deuterium-Halogen Light Source is optimized for fibers(bundles) with a diameter up to 600 µm, for larger diameter fiber bundles the AvaLight-DHS SMA connector focal point can be manually adapted to uniformly fill a larger core diameter fiber cable or bundels.

In all AvaLight-Deuterium sources an integrated TTL-shutter and filter holder for filters of up to 50x50x6.5 mm are implemented.

The Avalight-DHS internal TTL shutter can be controlled from the AvaSpec, so the auto-save dark option in the AvaSoft software can be used (extra IC-DB15-2 or IC-DB26-2 needed).

The filter holder can be easily replaced by a direct attach cuvette holder CUV-DHS (see section accessories) useful for fluorescence or absorbance measurements.