Operation Manual

64
SP
Shortpass Filters
Shortpass filters transmit a wide spectral band of short wavelength radiation and block long wave
radiation. (See Figure Below)
S/N
Signal to Noise Ratio
Ratio of intensity of signal to that of the background.
Stokes shift
The distance between the peak absorption and emission of a dye, usually in nm.
Filters for isolating the wavelength of illumination:
Shortpass and longpass filters, block or transmit wavelengths at specific cut-off wavelengths.
Bandpass filters exhibit broadband or short band transmission centered on a particular band of
wavelengths. Filters performance is defined by the central wavelength (CWL) and by the full width at
half maximum (FWHM).