Integrating Spheres

Integrating Sphere from Pro-Lite

Integrating spheres simplify complex optical measurements

Integrating spheres were first developed in 1894 as a tool to measure the output of the then newly invented electric light bulbs. Today, integrating spheres are widely used in the measurement of light sources, optical radiation and for testing the optical properties of materials.

An integrating sphere is a hollow, spherical chamber coated internally with a high reflectance coating that exhibits diffuse reflectance. Spheres are used as directionally-insensitive collectors of light when combined with photodetectors. An internally illuminated integrating sphere emits a field of spatially and angularly uniform luminance or radiance which is perfect for testing and calibrating imaging systems, detector arrays and remote sensing instruments.

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