Reflectance/Transmittance Spheres

Labsphere's Reflectance/Transmittance Sphere assemblies constitute one of the most basic reflectance measurement products and can be used to measure 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 the 0.7 – 20 μm wavelength range.

The RT Spheres feature five 1-inch diameter ports to accommodate sample and reference beams necessary for a 9° double beam geometry, as well as port plugs required for 9° single beam geometry. A 0.5-inch detector port is located at the top of the sphere. A specular light trap is included for specular subtraction methods.

RT-060-SF and RT-060-IG Reflectance/Transmittance Spheres
Labspheres RT-060-XX sphere features five 1-inch diameter ports to accommodate sample and reference beams necessary for a 9° double beam geometry, as well as port plugs required for 9° single beam geometry. Two one inch sample holders are provided with the sphere to mount the sample and a reflectance/transmittance standard. A 0.50-inch detector port is located at the top of 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 reflectance measurements, measurements of forward scattering and back scattering, and measurement of 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 Spheres with center mount
With the addition of center-mounted sample holders, users of Labspheres 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; two ports are 1.25-inch diameter. A center-mount stage is located at the top of the sphere and a 0.5-inch detector port is located at the bottom of the sphere assembly. The sphere comes with a detector mask to limit the detector field of view.


Reflectance/Transmittance Spheres Applications & Capabilities