Allied Vision Goldeye G, Technical Manual

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Filters and mounts
53 Goldeye G Technical Manual V 2.0.0
Specific filter applications
Bandpass filter
The Goldeye responds to wavelengths from about 900 nm to 1700 nm. It is
possible, however, to restrict the complete bandwidth to a certain range of
wavelengths by using a corresponding bandpass filter. That way, only a certain
wavelength band is transmitted, all others are blocked.
A bandpass filter is described by specific properties, like optical density, spectral
profile, etc. The main characteristic, however, is the center wavelength (CWL)
together with the bandwidth being transmitted (tolerance), e. g., the transmission
range of a water filter displayed inFigure 18 below is at 1450 nm with a tolerance
of ±50 nm.
Figure 18: Transmission range of a water filter