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Unlock Material Insights with Transmission & Reflection Spectroscopy
Transmission and reflection spectroscopy reveal critical information about a material’s physical and chemical properties by analyzing how UV, VIS, or NIR light interacts with its surface. Whether light is absorbed, transmitted, or reflected depends on the sample’s structure and composition.
Theoretical Background
Reflection or reflectance spectroscopy, is used to characterize materials in a non-contract matter by projecting incident light on a sample and measuring the corresponding reflected light. In specular reflection the angle of reflected light equals the angle of incident light (example mirrored surfaces). In diffuse reflection conversely the reflected light from a surface is scattered in many angles. Both types of reflection can be used on a variety of sample types from metals, glass and plastics to biologicals and powders. Transmission spectroscopy involves passing light through a sample and measuring the received light. Both specular and diffuse transmission measurements are possible much like reflection. Often samples of the same type can be characterized using either transmission or reflection.
