Balanced Deuterium Tungsten Halogen Light Source

Descrizione prodotto

Get Balanced! The innovative DH-2000-BAL is the world’s only balanced UV-NIR deuterium tungsten halogen source.

We’ve applied our expertise in patterned dichroic filters to an innovation in light source technology to create the only combined-spectrum illumination source available that eliminates saturation and signal-to-noise problems associated with the D-alpha line in the deuterium source.


  • Eliminates D-alpha line in deuterium source

  • Stable output 215-2500 nm

  • Innovative filtering technology produces smooth spectrum across entire range

The DH-2000-BAL Deuterium Tungsten Halogen Light Source combines the continuous spectrum of deuterium and tungsten halogen light sources in a single optical path, producing a powerful, stable output from 215-2500 nm.

About the D-alpha Line

All deuterium-tungsten halogen sources have a D-alpha line, revealed as a jagged peak in the visible portion of the spectrum, that produces “unbalanced” output in the deuterium and tungsten halogen sources. Correcting for this deuterium line — a sharp spectral feature near 655 nm — is difficult. For example, if you adjust spectrometer integration time to reduce the intensity of this saturated spectral line, the efficiency of the system at UV wavelengths drops significantly, compromising signal-to-noise performance. Also, spectrometer efficiency is greatest in the same general spectral range as the 655 nm line, exaggerating its effects.

Proprietary Filtering Technology

Using the same high-precision patterned dichroic filter technology that distinguishes our Linear Variable Filters, the DH-2000-BAL balances the intensity of the deuterium and tungsten halogen sources, producing a “smoother” spectrum across the entire wavelength range and eliminating problems associated with saturation. By comparison, most combination UV-NIR sources can be adjusted for relative intensity only.

Optical Fibers

We recommend using our solarization-resistant optical fibers with all versions of the DH-2000-BAL.

DH-2000-BAL Spectrum

DH-2000-BAL SpectrumA spectrum of the DH-2000-BAL, taken with an HR4000-CG-UV-NIR in scope mode, shows a balanced response across the UV-VIS-NIR with no D-alpha line.

DH-2000-BAL Specifications

Dimensions: 150 mm x 135 mm x 319 mm
Weight: 3.8 kg
Power consumption:  25 W (deuterium); 20 W (tungsten halogen)
Wavelength range: 215-400 nm (deuterium bulb) 360-2500 nm (tungsten halogen bulb)
Humidity:  5-95% without condensation at 40 °C
Tungsten bulb voltage: adjustable from 4.5 to 11.5 volts
Lamp current:  Operating 85 V/0.3A
Lamp lifetime:  1,000 hours
Lamp voltage:  Ignition 350 V/20°
Current voltage drift:  <0.01% per hour
Current voltage stability:  <5 x 10-6 peak-to-peak (0.1-10.0 Hz)
Operating temperature:  5 °C – 35 °C
Power requirements:  85-264 V 50/60 Hz
Total power: 100 W
Power consumption: 190 W maximum
Warm-up time: 40 minutes (deuterium); 20 minutes (tungsten halogen)
Markings: CE; VDI/VDE 0160; EN 61010

About the author

Massimo Albertazzi