Reflectance & Transmittance and Integrating Spheres

Spectral Evolution’s reflectance/transmittance (RT) sphere can be used to measure the reflectance, transmittance and absorption of leaf samples so that researchers can have a better understanding of leaf characteristics, red edge shift and plant stress.

Connected to the PSR+ high resolution/high sensitivity full range spectroradiometer, the RT sphere can measure an increase in reflectance and transmittance and decrease in absorption in the 695 – 725nm range. This provides an indication of how well a plant is responding to stress from lack of water, surplus of water, over fertilization, disease, insect infestation or many other stress related conditions.

The RT sphere can be used with both leaf and needle samples for specular included or excluded reflectance measurement, measurement of forward and back scattering, and transmittance measurement. The sphere is portable and can be used with an included stand or any common tripods.

The RT sphere can be connected to any of our portable spectroradiometers, including the PSR+ field spectroradiometer with a range of 250-2500nm. Detailed information about vegetation spectral features such as comparison of chlorophyll concentration in leaves with red edge characteristics can be collected.

A reflectance/transmittance sphere can also be used for photovoltaic (PV) cell development. It measures the optical properties of different materials, textures, and coatings on different PV cell designs. The RT sphere works with Spectral Evolution spectroradiometers and is portable. For the ultimate in optical property measurement stability, it can be configured with the SR-4500 TE-cooled spectroradiometer.

Spheres for Spectral Evolution Spectroradiometers:

• 4″ Reflectance/Transmittance (RT) sphere
• 4″ Integrating Sphere Option with Mounting (for use with SR/SM series
  spectrometer)
• 4″ Integrating Sphere – General Purpose 3 port with SMA-905 adapter
• 2″ Integrating Sphere – General Purpose 4 port with SMA-905 adapter