Glossary of Spectroscopy Terms - StellarNet, Inc.

What is a Data Log?

Dec 1, 2017 | Glossary of Spectroscopy Terms, Software

In the SpectraWiz software, the data log is a utility that records instantaneous samples every time you click a button that says “Save Sample.” It stores all of them, with timestamps, in a common file. Data stored in the log is not deleted unless the “Clear” button is...

What are the CIE XYZ tristimulus values?

Dec 1, 2017 | Glossary of Spectroscopy Terms, Software

The human eye has three types of cone cells that are stimulated by different wavelengths of light, leading to the perception of color. Colors can be quantified based on how much they stimulate the three cones. These are called the LMS tristimulus values. However, the...

What is QDisk?

Dec 1, 2017 | Glossary of Spectroscopy Terms, Software

In the SpectraWiz software, “QDisk” is a menu option that is a shortcut for taking a snapshot and saving it to disk.

What is the Integrated Peak Area?

Dec 1, 2017 | Glossary of Spectroscopy Terms, Software

The integrated Peak Area, also called the power spectral density (PSD), is exactly what it sounds like: it is the integrated area under a peak in a spectrum. This gives a scalar value with a meaning that depends on the units of the spectrum. For example, in...

What is the Peak Tool?

Dec 1, 2017 | Glossary of Spectroscopy Terms, Software

The peak tool is an application in SpectraWiz for calculating various peak related quantities. It can be accessed by clicking the green peak icon. The quantities it calculates are as follows: Peak: peak wavelength Centroid: centroid wavelength FWHM: full width at half...

What is a Cosine Receptor?

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...