The integrating sphere is a simple, yet often misunder-stood device for measuring optical radiation. The function of an integrating sphere is to spatially integrate radiant dAflux. Before one can optimize a sphere design for a particular application, it is important to understand how an integrat-ing sphere works. How light passes through the sphere
Integrating sphere - Wikipedia
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.
Part I deals with the materials and construction of various spheres, and describes in detail the construction of a reinforced concrete sphere at the Bureau of Standards. It gives tests of the accuracy of integration by this sphere, the absorption of light by. the sphere coating and by objects in the sphere, and the effect of the position of lamps.
Photometry - NIST
2021年6月2日 · NIST's program in photometry involves maintaining the SI base unit of luminous intensity, the candela, as well as other photometric quantities; establishing national calibration standards; and educating the photometric community about the fundamentals and practical aspects of photometry and photometric measurements.
Integrating Spheres – Instrument Systems
Determination of radiant power or luminous flux from light sources with the aid of integrating spheres is one of the most important procedures in photometry. Designed as a hollow sphere whose inner surface is coated with a diffusely reflecting material, the integrating sphere ensures complete integration and mixing of light radiation.
The integrating sphere is one of the most useful, yet least understood devices used in optical metrology. This paper will explain how the integrating sphere came into existence, what it does, how it works, and how it is used to simplify what would otherwise be complex measurements
6 Theory and Applications of Integrating Spheres - Gigahertz-Optik
Integrating spheres are very versatile optical elements designed to achieve homogeneous distribution of optical radiation through multiple Lambertian reflections at the sphere’s inner surface. Discover our diverse possibilities in integrating spheres technology.
The Art and Science of Lamp Photometry | NIST
2001年8月1日 · The paper then details recent developments and techniques in integrating sphere photometry that improve the uncertainty of luminous flux measurements. The design considerations for integrating spheres, calibration using standard lamps, sources of error, and methods of corrections are discussed.
A Guide to Integrating Sphere Radiometry and Photometry
2003年6月20日 · This technical guide presents design considerations for integrating sphere radiometers and photometers. As a background, the basic terminology of Radiometry and Photometry are described. The science and theory of the integrating sphere are presented, followed by a discussion of the geometric considerations related to the design of an ...
Integrating Sphere - SpringerLink
2016年1月1日 · When measuring surface properties, an integrating sphere is used as a uniform lighting source or a diffuser of the incident light. For the surface property measurement system, the integrating sphere is set to diffuse the reference beam and geometry structure to analyze the characteristics of the surface.
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