Nov 10, 2017 | Glossary of Spectroscopy Terms, Properties of Light, StellarNet Definition
What is Light Intensity, Absolute Intensity, and Irradiance? Light intensity is commonly used to describe the amount of optical power falling on a given area. In spectroscopy and radiometry, the more precise term for this quantity is irradiance. Irradiance is defined...
May 25, 2017 | Glossary of Spectroscopy Terms, StellarNet Definition
For clarity, “Dark” will be used to indicate a SpectraWiz dark spectrum and “dark spectrum” will refer to the concept. When you acquire a Dark, the SpectraWiz software saves the spectrum and subtracts it from all subsequent spectra that are acquired. Because of this...
May 25, 2017 | Glossary of Spectroscopy Terms, Spectroscopy, StellarNet Definition
The dark spectrum of a spectrometer is a spectrum taken with no light hitting the detector. It captures the shape of the baseline offset. It can be used to adjust sample spectra for non-uniformities in the detector pixels. The SpectraWiz software is able to do this...
May 25, 2017 | Glossary of Spectroscopy Terms, StellarNet Definition
The exposure time is the amount of time that the detector is exposed to light. This is related to the integration time, which is the amount of time the detector keeps electrons trapped in the pixel wells before reading them. If the detector has a shutter, the exposure...
Feb 26, 2017 | Glossary of Spectroscopy Terms, StellarNet Definition
What is a Spectrometer? A spectrometer is an instrument used to measure and analyze light as a function of wavelength. By separating light into its individual wavelengths, a spectrometer can reveal information about the composition, properties, and behavior of...
Feb 26, 2017 | Glossary of Spectroscopy Terms, Spectroscopy, StellarNet Definition
What is Raman Spectroscopy? Raman spectroscopy is a non-destructive analytical technique used to identify materials and characterize their molecular structure. It works by measuring the small changes in wavelength that occur when laser light interacts with a sample....