Integrating Spheres
AvaSphere 30-REFL

An integrating sphere works as a lightcollector. The light collected can be used
as a diffuse illumination or measurement
source. The basic principle is that lightenters the sphere through the sample
port, goes through multiple reflections on
the highly reflective, Lambertian surfaceof the sphere and is scattered uniformly
around the interior of the sphere. Behinda baffled port inside the sphere which is
independent of the angular properties ofthe sample port, a fiber-optic cable collects
a homogenized light signal and carries itto the spectrometer. The baffle is very significant as it prevents first reflections fromentering the detection fiber.
The AvaSphere series integrating spheres
are available with active diameters of 30,
50 and 80 mm and an SMA port at 90
degrees for collecting the irradiance andreflection signals. The reflection spheresfeature an additional SMA-connector port
at 8 degrees from normal (from sampleport) for direct illumination. This port couples external light into the sphere througha fiber-optic cable connected to a COL-UV/
VIS collimating lens. The sample port diameters are 6 mm for the AvaSphere-30, 10mm for the AvaSphere-50 and 15 mm for
the AvaSphere-80.
All sample ports are knife-edge, ensuring anear 180 degree field of view of the sample
port. The irradiance version of the integrat-Accessories
Reflection Integrating Sphere
Drawing for AvaSphere-50-REFL or 80-REFL| info@avantes.com | www.avantes.com

ing sphere can be used for measurementsof light sources, such as lasers, LEDs andincandenscent sources. For irradiance measurements of 5 mm cylindrical LEDs, a special adapter is available for the AvaSphere50/80-IRRAD. This adapter ensures correct
and reproducible positioning of the LEDsinside the sphere.
The AvaSphere reflection version is used
for the measurement of total integrated
reflectance of a surface, as well as forcolor measurements and fluorescence
spectroscopy on solids/powders. The principle of measurement is based on direct
illumination and indirect reflection. The
AvaSphere-50-LS-HAL with internal lightsource can be a used as a low-cost uniform
source and is available with an intensity
calibration file.
The inside of the integrating spheres ismade of a highly reflective diffuse PTFE
material. This provides over 96% reflectance over a wide wavelength range of250-2500 nm. For the AvaSphere-50-REFL
a special black gloss-trap is available toexclude specular reflection in the measurement. Please order this option when ordering the sphere. In case specular reflectionneeds to be included, a white reflectivepart, which is standard on all AvaSphere50-REFL, can be mounted in the position ofthe gloss-trap.

Reflection Curve AvaSphereTechnical Data
AvaSphere-30

AvaSphere-50

AvaSphere-80

Internal diameter (mm)305080Sample port diameter (mm)6101559.5 mm diameter
40 mm height

69.5 mm diameter
60 mm height

109 mm diameter
95 mm height

External Dimensions

Ordering Information
AvaSphere-30-IRRAD

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AvaSphere-80-IRRAD

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AvaSphere-30-REFL

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AvaSphere-50-REFL

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AvaSphere-80-REFL

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AvaSphere-50-LS-HAL
AvaSphere-LED-ADR
AvaSphere-LED-ADR-80
AvaSphere-GT50
AvaSphere-GT50-W

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Integrating Sphere with internal
halogen light source
AvaSphere-50-LS-HAL-12V

Providing up to 160 times more light onyour sample for a reflection measurement relative to our standard reflectance
integrating sphere, the AvaSphere-50LS-HAL-12V is a valuable instrument forreflection applications. It is a combinationof an integrating sphere and a halogen
light source. The sphere provides diffused
halogen light on your sample without thelosses associated with fiber-optic coupling.
It has a direct collimated SMA-port for collection of the reflection signal with any of
our AvaSpec spectrometers.
It’s mostly useful for dark or low reflecting
materials and NIR spectral measurements

where signal strength can be limited. It isalso very useful for measuring gem stones.
In the application section of this catalog acomplete gemology setup can be found.
The AvaSphere-50-LS-HAL-12V has an internal diameter of 50 mm, a sample port of
10 mm and an SMA terminated reference
port. The 5W halogen lamp is stabilized
and cooled with forced airflow. A 12V
power supply is included.
The switch line makes it possible toremotely switch the ligthsource on/offwith a TTL signal.

Technical DataWavelength range

360-2500 nm

Internal diameter

50 mm

Sample port diameter

10 mm

Color temperature

2850 K

Stability/Drift< 0.1% / hBulb life

4.000 hrs

Power requirement

12VDC, 1A

External Dimensions

70 mm diameter, 82,5 mm height

Ordering Information
AvaSphere-50-LS-HAL
AvaLight-HAL-B-5W
IC-DB26-AvaSphere-0,5
AvaSphere-50-HOLD

 Integrating sphere 50 mm for reflection (360-2500 nm), including 5W halogen lightsource,
sample port 10 mm diam., 2 SMA ports (reflection and reference) and 12V power supply.
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Accessories

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Large Integrating Spheres
For measurement of high powered
LEDs and sources, Avantes offers theAvaSphere-100, -150 and -200. The number
corresponds with the internal diameter ofthe spheres in millimeters.

All spheres can be attached to spectrometers via fiber-optic cables and the entire
system can be irradiance calibrated tomeasure total flux of a lamp under test.
Special sizes on request.

The 100, 150 and 200 models come withthree ports: at 0, 90 degrees and NP. The
port of your choice is fitted with a baffled
SMA-905 connector, please specify whenordering. Either of the other two ports canbe used for illumination or sampling. The
default sample port sizes are typically 25%of the sphere’s diameter. Port plugs orreducers are available on request.

Technical Data
AvaSphere-100

AvaSphere-150

Wavelength range

AvaSphere-200

400-1100 nm

Internal diameter

102 mm

152 mm

203 mmPort diameters25.4 mm

38.1 mm50.8 mm

Port Reducers
External Dimensions

10 mm
118 mm

168 mm

218 mmOrdering Information
AvaSphere-100

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AvaSphere-100-SMA

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AvaSphere-100-PP
AvaSphere-150

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AvaSphere-150-SMA

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AvaSphere-150-PR10

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AvaSphere-150-PP
AvaSphere-200

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AvaSphere-200-SMA

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AvaSphere-200-PP

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For the latest information,
go to www.avantes.com