The recent years has
witnessed the fast development of Integrating sphere, it is one of the most
important device for spectral and luminous flux measurement of light source. it
is widely applied in the photometric and colorimetric test system in led
measurement applications.The inside surface of an integrating sphere is coated
with a diffusely reflecting material which guarantees complete integration and
homogenization of the emitted radiation.The Integrating sphere is an important
instrument of optical measurement for enabling high sensitivity measurements.
The sphere is made of a sintered PTFE, which is >98% reflective in the
visible. Each of the integrating spheres can couple to our spectrometers to
measure the total integrated reflectance of surfaces placed against the
sphere's sample port.Integrating spheres generally function as a light
collector. The collected light can be used as a diffuse illumination source or
as a measurement source.In the Avantes line of integrated spheres the spheres
are mostly used as measurement source. The basic principle of operation is that
light enters the integrating sphere through the sample port, goes through
multiple reflections and is scattered uniformly around the interior of the sphere.
The detection fiber optics are SMA-coupled to the port at the side of the
sphere which is viewing illumination on a baffle, independent of the angular
properties of the light at the sample port. The baffle prevents first
reflections to enter the detection fiber.
