Why use the integrating sphere？
Light is a form of energy, and is part of a broad spectrum of electromagnetic radiation. But we can only see a small portion of this radiation—the portion we call visible light. The wavelength of visible light is 380nm~780nm. If we need to understand and analyze the visible light, we need to use a professional precision instrument to measure and analyze it.
The accuracy of the measurement can be improved by the traditional optical diffusion sheet, which can reduce the error caused by the uneven distribution of the incident light source on the detector and the light beam deviation. However, when more precise measurement is needed, the measurement method of optical diffuser cannot meet the needs of users. We have to make more sophisticated equipment to replace the optical diffuser. This alternative is the integrating sphere.
An integrating sphere (also known as an Ulbricht 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.