Tungsten-Halogen Xenon Uniform Calibration Sources

For UV Radiance Calibration and Solar Simulation

The TX-USS Series Tungsten-Halogen Xenon Calibration Sources are designed for use as lambertian solar simulators or UV radiance calibration sources. Our conventional L/R Sources have spectra very close to a 3000 K lamp, with spectral peak around 900 nm and very little light below 400 nm. For applications that require a spectrum closer to a solar spectrum, Labsphere offers the TX-USS Series which combines light from a Xenon arc source with a Tungsten-Halogen lamp. This combination provides light over the entire spectrum from 250 to 2500 nm. A TX-USS Source can provide a very good simulation of albedo 1.0 solar radiance.

The standard TX-USS Systems are available in sphere sizes ranging from 12 inches (30 cm) to 76 inches (2 m), including 12 inch (30 cm) and 20 inch (50 cm) UV enhanced models featuring our proprietary Spectralon^® PTFE sphere material. Systems include all necessary power supplies, light sources and variable attenuators to individually control the light output to achieve a spectral energy distribution that models the ultraviolet portion of solar radiation. A selection of detector and calibration options is available to configure the system to meet applications requiring ultraviolet or blue radiance.

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Custom Capabilities

Labsphere engineers have years of experience designing and manufacturing high value standard and customized luminance and radiance uniform light source systems. Our optical, electrical, mechanical and software engineers will work with you to design and build a customized system that meets your requirements.

System Software

Monitor and Control System Performance to Best Achieve Your Application

SOFTWARE FEATURES:

• Achieve variable output levels while maintaining consistent color temperature
• Self monitoring of luminance in fL and cd/m² and color temperature
• Monitor spectral radiance at specified wavelength with systems calibrated for spectral radiance
• Powerful menu driven software

Application software provided with the system operates in a convenient Windows^® environment and is used to control and monitor light output. The software allows users to turn lamps on and off individually and monitor the voltage and current of the light source. The detector current calculated luminance and correlated color temperature are monitored in real time so that output can be precisely adjusted. Systems with the automated variable attenuator control option allow users to select and drive luminance values via a software feedback control that is linked to a luminance monitor.

Optional Accessories

Filter/Target Holders for Exit Port
Filter/Target Holders are used to mount a filter in front of a detector or sphere port. Filter holders accommodate different filter thicknesses or a stack of filters up to 0.375 inches. The filter holders mount easily to the mounting ring designed into all integrating sphere ports.

6 and 12 Position Filter Wheels and Controllers
Filter Wheels and Controllers can be mounted in front of a detector or sphere port. They are used to either manually or automatically switch between up to 6 or 12 different filters or aperture sizes. Filter wheels accommodate different filter thicknesses or a stack of filters up to 0.375 inches. The filter apertures are sized for either 1 or 2 inch diameter ports.

Automated Variable Attenuator
Variable attenuators are used to vary the intensity of an external light source entering the sphere, while minimizing color shifts in the output spectrum. The automated variable attenuator is a motorized attenuator that includes an aperture controller module and is operated through the system software. A dual channel attenuator is also available for applications requiring more than one type of lamp, such as our Tungsten-Halogen Xenon systems.

SMS-LR-USS Spectral Measurement System
The SMS-LR-USS option for the LR series allows the user to monitor the spectral output of the sphere in real time. The SMS-LR spectral monitor will track changes in the output due to age of the lamp or changes induced by the variable attenuator. Furthermore, if the LR-USS system contains a xenon source, spectral monitoring is needed to track the luminance of the output. When using the automated variable attenuator option, the SMS-LR-USS has the ability to "Hunt and Seek" the desired luminance output, while still spectrally monitoring the source.

SPECIFICATIONS FOR TUNGSTEN-HALOGEN LUMINANCE RADIANCE MODELS

for UV Radiance Calibration and Lambertian Solar Simulation