What is Signal to Noise Ratio?
The signal to noise ratio, often abbreviated S/N, is exactly what it sounds like; it’s the ratio of the magnitude of the signal to the magnitude of the noise. Experiments need a large S/N to be able to distinguish features in the signal from the noise. If the S/N is...What is a Spectrometer’s Dark Noise?
Dark noise is the noise associated with the dark current. It is a type of shot noise where the event is a thermally generated electron. If the dark current generates N counts on the detector, the dark noise is √N. Dark noise is indirectly dependent on temperature...What is Spectrometer Noise?
Noise is a collective term for sources of unwanted signal. Some noise sources introduce systematic error, and can be corrected for, such as with a dark spectrum. Other noise sources introduce random error, and can be averaged out over several acquisitions. The...What is Quantum Efficiency?
Spectrometer Quantum efficiency describes how many photons that hit a detector actually generate electrons. It is usually expressed as a percentage of photons. It is also wavelength dependent. StellarNet provides detector efficiency curves that display this...What is Dark Spectrum (in SpectraWiz)?
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...
Introducing our new Applied Spectroscopy Division
New Handheld Raman!
New! ChemWiz-ADK Handheld NIR Spectrophotometer with on board chemometrics and spectral matching!
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Check out our SpectroChemistry Systems for UV-VIS and Fluorescence Applications
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New Spectrometer Python Application Driver
for Windows, Linux, RasPi, Mac
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HYPER-Nova Highest Performance Raman Spectrometer
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