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- Spectraflect
Integrating Sphere
- Wide
Spectral Range, 350–1050 nm
- Wide
Radiometric Range, 10 µW-1W
- 2
nm Spectral Resolution
- Plug-in
PC Card Controller
- Total
Power
- Peak
Power
- Peak
Wavelength
- Full
Width Half Maximum of Peak
- Lumens
- Chromaticity
- Color
Rendering Indices
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The LED-202
Measurement Systems is an integrating sphere based measurement
system for radiometric, photometric and spectral analysis of Light
Emitting Diodes (LEDs) and Infrared Emitting Diodes (IREDs). Since
LEDs and IREDs are used as a source of light in a large number
of critical applications, it is important to obtain the spectral
output differences of the devices. The LED-202 Measurement System
allows for rapid collection of spectral data from the source and
provides 2 nm spectral resolution. The system's software automatically
finds the peak wavelength and zooms in on the spectral region
around the peak. The total power from the source is displayed
in milliwatts. For all diode emitters, the full width half maximum
(FWHM) of the peak is displayed. For visible LEDs the lumens and
chromaticity coordinates can be calculated.
The
LED-202 incorporates the use of a 2 inch diameter Spectraflect
integrating sphere to collect the light from diode emitters.
Integrating spheres have the ability to collect the total
flux from a light source without any sensitivity to the light
distribution. The LED under test mounts to an opening in the
integrating sphere. The interior of the integrating sphere
is coated with Spectraflect reflectance coating, a perfectly
Lambertian, 100% reflecting surface that is ideal for applications
from the UV to the NIR.
At
the heart of the LED-202 is a diode array spectrometer for
instantaneous spectrum acquisition and display. The spectrometer
covers a wide spectral range extending 350 nm to 1050 nm.
Fiberoptic coupling from the integrating sphere is hard-mounted
to the spectrometer to maintain system wavelength accuracy.
The
LED-202 uses a microprocessor-based system controller. This
includes a radiometer which monitors the total flux within
the integrating sphere and appropriately scales the spectral
data.
The
LED-202 system includes a 16-bit analog-to-digital converter.
The plug-in A/D card is user-installed into a desktop PC in
just a few minutes. The system's Windows-based software provides
an easy-to-use environment for data acquisition, display and
analysis. Click-and-point mouse control links pull-down menus,
dialog boxes and icon commands.
PART
NUMBER
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LED-202
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Spectral
Range:
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350
- 1050 nm
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Sensitivity
Range:
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10
µW-1W
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Spectral
Resolution:
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2.0
nm
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Wavelength
Accuracy:
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0.5
nm
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Spectrometer
Exposure Times:
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100
ms - 60 s
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Sphere
Diameter:
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2
inches
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Sphere
Material/Coating:
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Spectraflect
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Electrical
Interfaces:
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rear-panel
DB-9 connectors
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Software
Requirements:
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Windows
3.1 or higher, 1.2 Mb disk space
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