Applications of Integrating Sphere Labsphere


Integrating sphere is a device used to measure radiant flux. The flux is then carefully monitored either directly or when it comes in contact with a sample. One of the key applications of integrating sphere labsphere is measuring transmittance or reflectance through scattering or diffuse materials.

There are more applications, learn about them below:

Radiometer and photometer

Integrating sphere labsphere when combined with a photodetector which is of the correct spectral response is utilized to calculate the gross geometric flux coming out of a light source. Flux density too of the illuminated areas can be calculated.


It is the spectral properties of the light source which helps in deciding the right photodetection system. This is the first application.

The Sphere Photometer
By far the oldest of all the applications of integrating sphere is counting gross of geometric luminous flux from electric lamps. This method began towards the beginning of the 20th century. It was used to compare lumen output of different types of lamps. Lamp industry is still using this widely.

Another method is goniophotometer. This is required to rotate a photodetector around the lamp in a complete sphere.

Laser Power Meters
Apart from the main application of reflectance and transmittance, another application of integrating sphere labsphere is using a port that opens up into an internally illuminated integrating sphere as a big source with constant radiance.

All these sources are utilized for fine tuning electronic imaging devices/systems or just back illuminators.

Reflectance and Transmittance of Materials

This is the main application of integrating sphere. It is used to calculate reflectance and transmittance of scattering or diffuse materials. It is always done as an outcome of wavelength.

Diffuse transmittance helps in calculating the UV resistance of pharmaceutical containers, automotive paints and pharmaceutical containers in the ultraviolet.
The colors of various materials are checked in paint, textile and graphic arts industry in the visible industry.

The sum total of hemispherical reflectance calculates surface emissivities, which  then analyzes radiant heat transfer of the thermal control coatings and foils of spacecraft design.

Summing up

Integrating sphere Labsphere has many more applications. Some of them have been discussed above. For more keep coming to this section.

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