Design criteria for the configuration of integrating spheres for material characterization (ISM)

Photometric material properties, such as reflection, transmission, absorption, fluorescence and photoluminescence can be accurately determined or characterized with our integrating spheres and unique configurations. In all these applications an optical source is needed for reference or excitation.

Typical measurement arrangements with collimated light sources

Reflection: integrating sphere with sample port and collimated light source for illuminating the sample through the sphere for measuring total and diffuse reflectance of the sample.

Transmission: integrating sphere with sample port at sphere entrance with collimated light source for illuminating the sample. For measuring total transmission including scattered light from the sample.

Absorption and fluorescence: integrating sphere with sample holder for mounting the sample in the center of the sphere. Sample illumination with collimated light source. Absorption: measures the difference with and without the sample. Fluorescence and photoluminescence: measures the emitted radiation from the excited sample

 Typical measuring arrangement with diffuse sample illumination

Integrating sphere with sample holder for mounting the sample in the centre of the sphere. Diffuse illumination of the sample by light source with baffles. Spectral absorption measurement of the sample by the illumination spectrum.