ISP-I Integrating Spheres connect to our spectrometers and optical fibres to measure the spectral output of LEDs, lasers and other light sources. Each sphere consists of a PTFE-based, sintered diffusing material that provides a Lambertian surface (with >98% reflectivity in the visible) for irradiance measurements. Sample port sizes of 6 mm and 8 mm are available and the larger-diameter spheres can be attached directly to FLAME series spectrometers.

ISP-R series fiber optic integrating spheres couple to Ocean Optics spectrometers to measure the total integrated reflectance of surfaces placed against the sphere’s sample port. ISP-R integrating spheres are well-suited for measurement of opaque or highly directional samples. The spheres are available in 6 mm and 8 mm sample port diameters and gloss-trap options are available that allow you to measure the specular component of the total integrated reflection.

Key Features

  • 200-2500 nm
  • 30, 50 or 80 mm diameter spheres
  • 6, 8, or larger diameter ports available
  • Optional adapters for LEDs, calibrated lamps, and optical stages


  • Colour Measurements
  • Reflectance & Transmittance
  • Irradiance