| |
Narrow-band light source:
In general, narrow-band light sources are used as excitation sources. In some wavelength ranges that lasers cannot cover, narrow-band light sources are very useful. Some atomic emission lamps are used as reference standards for wavelength calibration in spectroscopic applications.
- Wavelength tunable light source:
With the combination of a monochromator and a broad-band light source, continuously tunable, narrow-band wavelength light can be acheived. The bandwidth depends on the slit width and the grating groove density used in the monochromator (~1-20nm, typically).
- Calibration light source:
Depending on the gas filled in a lamp, discrete spectral lines of defined wavelength, spectral width and relative instensity can be obtained.
|
