Reflectance/TransmittanceIntegrating Spheres
Accurate and flexible design accommodates a wide variety of samples

Accurate
Labsphere’s Reflectance/Transmittance Sphere
Assemblies are one of our most basic reflectancemeasurement products and can be used tomeasure the reflectance or transmittance of a wide
variety of sample mediums. Offered in two standard
designs, each sphere is available in one of two
reflective coatings; Spectraflect®, our highly diffuse
reflective coating effective over the 300 - 2400 nm
range and Infragold®, designed for use in the0.7 - 20 μm wavelength range.
The RT Spheres feature five 1 inch diameter ports
to accommodate sample and reference beams
necessary for a 8° double beam geometry,
as well as port plugs required for 8° single beamgeometry. A 0.5 inch detector port is located at the
top of the sphere. A specular light trap
is included for specular subtraction methods.

Advancing the Technology of Light: Measure. Create. Reflect.

Versatile
RTC Spheres add further versatility with twocenter-mounted sample holders so users are able
to measure reflectance and transmittance versus
incident angle of radiation. Five ports accommodate
sample and reference beams with a center-mountstage located at the top of the sphere, and a 0.5
inch detector port located at the bottom of
the sphere assembly.
Both sphere assemblies are suitable for all
geometric transmittance measurements. The RT
Sphere Assembly can perform reflectancemeasurements in the specular included (8°/h)
and specular excluded (8°/d) geometries. The
RTC Integrating Spheres provide specular included(8°/h) and specular excluded (8°/d) geometries,
as well as reflectance measurement capabilities
at variable angles of incidence.

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PB-13034-000 Rev 01

The sphere ports are knife-edged to permit collection ofwide-angle scatter and the baffling is minimized to allow thedetector a maximum view of the sphere wall. A detector port
is located at the top or bottom of the sphere and baffled fromreceiving direct radiation from the sample and reference ports.
Measure• Reflectance and transmittance of materials• Reflectance of opaque samples• Transmittance of turbid samples• Color properties• Reflectance system design• Infrared reflectance• Reflectance vs. Angle

Spectraflect Reflectance Coating

Infragold Reflectance Coating

Specifications and Ordering Information 			Model Number
RT-060-SF
RT-060-IG
Order Number:
AS-02484-100
AS-02485-100
Sphere Diameter:
6 inches
6 inches
Sphere Coating:Spectraflect
Infragold
Optimum Spectral Range:
250 - 2500 nm
0.7 μm - 20 μm
Detector Port Diameter:
0.5 inch
0.5 inch
Sample and Reference Ports:
Five
Five
Sample and Reference Port Diameters: (Qty) 1 inch (5)1 inch (5)			
Sphere Mount:
1/4 - 20 boss
1/4 - 20 boss
mounting post
mounting postand base assembly and base assembly

RTC-060-SF
AS-02484-000
6 inches
Spectraflect
250 - 2500 nm
0.5 inchFive
1 inch (3)1.25 inch (2)Adjustable H
frame assembly

RTC-060-IG
AS-02485-000
6 inches
Infragold
0.7 μm - 20 μm
0.5 inchFive
1 inch (3)1.25 inch (2)Adjustable H
frame assembly

Optional Accessories		 Order Number
Koehler Illuminator Assembly, KI-120				
AS-02509-100
Clip-Style Center-Mount Sample Holder, CMSH-RTC-CLIP-SF
AS-02759-000
Cuvette-Style Center-Mount Sample Holder, CMSH-RTC-CUV-SF AS-02728-000
Port Adaptor for OOI 74 Series Collimator Lenses, PA-100-74S
AS-02763-000
Reflectance Standard Set						Choose from available options
Labsphere Detector Assemblies					Choose from available options

Advancing the Technology of Light: Measure. Create. Reflect.

sales@labsphere.com

www.labsphere.com© 2021 Labsphere, Inc. All Rights Reserved
PB-13034-000 Rev 01

RT-060-SF and RT-060-IG Reflectance/Transmittance Spheres
Labsphere’s RT-060-XX Sphere features five 1 inch diameter ports to accommodate sample andreference beams necessary for a 8° double beam geometry, as well as port plugs required for 8°
single beam geometry. Two one inch sample holders are provided with the sphere to mount thesample and a reflectance/transmittance standard. A 0.50 inch detector port is located at the topof the sphere. The sphere also comes with a detector mask to limit the detector field of view.
A specular light trap is included for specular subtraction methods.
The spheres are appropriate for specular included and specular excluded reflectancemeasurements, measurements of forward scattering and back scattering, and measurementof the transmittance of turbid or scattering samples. The sphere ports are knife-edged to permit
collection of wide angle scatter and the baffling is minimized to allow the efficient integration.
To ensure high sphere efficiency, the total port area is <5% of the sphere surface area.
The integrating spheres each have a mounting assembly consisting of a rod base with a
1/4 - 20 boss, so sphere height is easily adjustable.

RTC-060-SF and RTC-060-IG Reflectance/Transmittance Sphereswith Center Mount
With the addition of center-mounted sample holders, users of Labsphere’s RTC-060-XX are able
to measure reflectance, and in some cases, transmittance versus incident angle of radiation.
The RTC-060-IG Sphere features four ports to accommodate sample and reference beams.
Three ports are 1 inch diameter and two ports are 1.25 inch diameter. A center-mount stage islocated at the top of the sphere and a 0.5 inch detector port is located at the bottom of the sphereassembly. The sphere comes with a detector mask to limit the detector field of view.
The RTC Series Integrating Sphere Assemblies include five sample holders: two center-mountsample holders, two 1.25 inch diameter sample holders and a single one inch device for furtherflexibility. The center mount sample holder allows for the measurement of reflectance versus incident
angle of a wide variety of samples. The jaw-style center mount sample holder is included withthe sphere, while clip and cuvette-style center mount sample holders are optional accessories.
The jaw-style may be used for samples that can be clamped. Samples as large as 1 inch by
2 inches and up to 0.38 inches thick can be held by the jaws of the sample holder. The clip style
center-mount sample holder is designed for thin films or samples which do not have the rigidity tobe held by the jaws-style sample holder. Samples up to 1.50” x 2” x 0.125” thick can be held using
the clip-style center-mount sample holder. The cuvette-style holder holds standard 12.5 mm square
cuvettes and is used to hold liquids and powders for absorbance and scatter characterization.

Advancing the Technology of Light: Measure. Create. Reflect.

sales@labsphere.com

www.labsphere.com© 2021 Labsphere, Inc. All Rights Reserved
PB-13034-000 Rev 01