440-8-OH Variable Ultraviolet Integrating Sphere Calibration Standard0 pages

OL 440-8-OH
Variable Ultraviolet
Integrating Sphere
Calibration Standard
The OL 440-8-OH Variable Ultraviolet Integrating Sphere Calibration Standard is large area, uniform, diffusely radiating
source with a near normal integrated radiance that can be varied over several decades. The OL 440-8-OH consists of
a forced air cooled source housing incorporating a deuterium lamp that is coupled to an 8-inch diameter integrating
sphere coated with pressed PTFE. A micrometer-controlled aperture between the lamp and the 1-inch diameter input
port of the integrating sphere allows continuous adjustment of the sphere intensity over the full useful range.
The in-line sphere port concept with an intermediate spider baffle provides for uniformity across the radiating aperture.
A precision UV-enhanced silicon detector is mounted in the sphere wall and monitors the source intensity. An external
radiometer, such as the OL 730C Programmable Radiometer/Photometer or equivalent, is utilized for readout of the
integrated source radiance by measurement of the monitor detector current.
A shutter, located between the lamp and the entrance port of the integrating sphere, allows zeroing out the monitor
detector without removing power to the lamp. The location of the shutter also ensures that any stray light (room light)
entering the exit (radiating) port of the sphere is properly accounted for when zeroing the monitor detector. The
sphere’s exit (radiating) port has a 2.0-inch (50.8-mm) diameter aperture opening.
The OL 440-8-OH is provided with a spectral radiance calibration over the 200 nm to 400 nm region. The source is
also available without calibration.

OL 440-8-OH Variable Ultraviolet Integrating Sphere Calibration Standard – top view
Contact: orlandosales@goochandhousego.com

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As part of our policy of continuous product improvement, we reserve the right to change specifications at any time
Bulletin 79 / Rev 7-11
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