Latest webinar from PerkinElmer

Integrating Spheres in Molecular Spectrophotometry:
Theory and Practice

Understanding the purpose and general theory
of integrating sphere operation and function

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Broadcast on Thursday, October 23, 2012

This webinar is now available on-demand.
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Integrating spheres are the most commonly purchased accessories for high end UV/Vis/NIR spectrophotometers. They provide the ability for spectrophotometers to make a number of crucial measurements on both solid and liquid samples. Those measurements include scatter transmission, total reflectance (diffuse plus specular), diffuse only reflectance, and total absorbance spectra (center mount). This webcast will first explain the general theory of integrating sphere operation and function. Since there exist a wide variety of sphere sizes and designs, we will next consider how the properties of the different sphere types relate to the specific sample or measurement to be made. Unlike liquids, solid samples have a variety of sizes, shapes, and textures that need to be considered before measurement. Something as simple as sample placement can result in different spectra. The webcast concludes with a look at the novel large format 270 mm integrating sphere used in the glass and solar industry.

Here are just a few of the questions that will be addressed:

• What is the function of the integrating sphere and how does it work?
• What type of measurements can I make using an integrating sphere?
• How do you select the sphere size and design?

These are just a few of the important question users need to know the answers to before measuring a solid sample. This presentation will center on the facts and techniques that analysts need to know so that the correct measurements can be made.

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