What is Chroma?

Dec 1, 2017 | Characterization, Glossary of Spectroscopy Terms, Software

Chroma describes how pure, or monochromatic, a color is compared to a white surface with the same illumination. For example, if a white surface is illuminated with 0.1W m-2 nm-1, the irradiance spectrum will also show 0.1W m-2 nm-1 at all visible wavelengths...

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...