Nov 10, 2017 | Glossary of Spectroscopy Terms, Sampling
A cosine receptor (sometimes called a cosine corrector) is a type of light receptor that is used for radiometry and photometry. It collects all light in a 180 degree field of view, making it suitable for measuring light from a planar surface or light from multiple...
May 25, 2017 | Glossary of Spectroscopy Terms, Sampling
Fibers can be damaged if they are bent too far. The bend radius is the the radius of the smallest circle a fiber can be bent into before it sustains damage. A smaller number means that a fiber can bend more sharply. The bend radius is proportional to fiber diameter,...
May 25, 2017 | Glossary of Spectroscopy Terms, Sampling
A blank is a sample that contains everything except for the analyte of interest. For example, if you are doing a UV-vis experiment to measure concentrations of Green Fluorescent Protein, the protein has to be dissolved in a solvent. The blank is a sample of just the...
Mar 19, 2017 | Glossary of Spectroscopy Terms, Sampling
The SATR probes take advantage of the high refractive index of sapphire to consistently generate total internal reflection at the interface between the probe and the sample. When a beam is reflected through total internal reflection, an evanescent wave with the same...
Feb 26, 2017 | Glossary of Spectroscopy Terms, Sampling
Raman probes are devices that use fibers to deliver the excitation laser beam to the sample and collect the signal, allowing for more flexibility with the sample holder. Raman probes can be adjusted to have additional probe tips for adjusting working distances as well...
Feb 26, 2017 | Glossary of Spectroscopy Terms, Sampling
Reflectance probes are fiber bundles designed to deliver the light source to the sample and collect signal that is reflected back. Six or seven fibers in an outer ring are used to illuminate the sample and one fiber in the middle collects the signal. These probes are...