Dec 1, 2017 | Characterization, Glossary of Spectroscopy Terms, Software
Delta E is an equation to describe the difference between two colors when using the CIE L* a* b* graph. It is defined as follows: As a general rule of thumb, a delta E of one is barely perceptible and a delta E greater than three means two different colors. However,...
Dec 1, 2017 | Characterization, Glossary of Spectroscopy Terms, Software
The correlated color temperature is another way to describe a light source’s color point on the 1932 CIE chromaticity diagram. It compares the color to that of a blackbody source heated to a certain temperature. For example, light bulbs are described as 2700K, 5000K,...
Dec 1, 2017 | Glossary of Spectroscopy Terms, Software
Episodic Data Capture is a tool in the SpectraWiz software that can be used to capture spectra over a certain time period. It can be found under the “Setup” menu. For example, it could be set up to capture a spectrum every second while a reaction is occurring to...
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...
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...
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...