page_title: Integrating sphere
section_title: See also
hierarchical_section_title: Integrating sphere / See also
caption_attribution_description: Deutsch: Plastik „Ulbrichtsche Kugel“ von Jürgen Schieferdecker (1984), vor dem Willersbau der Technischen Universität Dresden English: Artwork „Ulbrichtsche Kugel“ („Integrating sphere“) by Jürgen Schieferdecker from 1984, on the campus of the Technical University of Dresden
context_page_description: An integrating sphere is an optical component consisting of a hollow spherical cavity with its interior covered with a diffuse white reflective coating, with small holes for entrance and exit ports. Its relevant property is a uniform scattering or diffusing effect. Light rays incident on any point on the inner surface are, by multiple scattering reflections, distributed equally to all other points. The effects of the original direction of light are minimized. An integrating sphere may be thought of as a diffuser which preserves power but destroys spatial information. It is typically used with some light source and a detector for optical power measurement. A similar device is the focusing or Coblentz sphere, which differs in that it has a mirror-like inner surface rather than a diffuse inner surface.
  Even small commercial integrating spheres cost many thousands of dollars, as a result their use is often limited to industry and large academic institutions. However, 3D printing and homemade coatings have seen the production of experimentally accurate DIY spheres for very low cost.
  The practical implementation of the integrating sphere was due to work by R.
context_section_description: Lambert's cosine law
caption: Sculpture of an integrating sphere. Located on the campus of the Technical University of Dresden
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