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Variable constant colour temperature luminance source

ULS300 from Bentham

The ULS300 is designed for applications requiring a variable, yet constant colour temperature (CCT), luminance source. Comprising a stable 250W quartz tungsten halogen lamp (QTH), light is transported to a 300mm diameter integrating sphere via an eight branch fibre for homogeneous illumination.

Features

Sphere with 100mm aperture, 50mm port reducer used to increase the radiance
Luminance continuously variable from <30 cd•m^-2 to 14500 cd•m^-2
CCT 3100K ±20K variation over full luminance range
Light transported via an 8-branch fibre for homogenous illumination
Features 250W quartz halogen (QTH) lamp

Further information

Continuously variable from <30 cd•m^-2 to 14500 cd•m^-2 the ULS300 output is highly-uniform over the 100mm diameter aperture, ±0.05% independent of luminance setting. The CCT is nominally 3100K with less than ±20K variation over full luminance range.

Micrometer adjustable bi-lateral slits situated between the lamp and the fibres allow for high-accuracy light level adjustment over 50μm to 10mm.

Core benefits

Supreme uniformity and high stability across a wide range
Delivers continuously variable luminance
Measure with confidence, calibration performed with respect to Physikalisch-Technische Bundesanstalt (PTB, Germany)
Exceptional uniformity ±0.05% over 100mm diameter aperture, independent of luminance setting

Specifications

ULS300

Luminance	Continuously variable from <30 cd•m^-2 to 14500 cd•m^-2
Uniformity	±0.05% over 100mm diameter aperture, independent of luminance setting
CCT	3100K ±20K variation over full luminance range
Options	Monitor detector with readout SMA (or other) ports for coupling to spectroradiometer Software control of luminance Port reducers