Stranica 59 [59]
1e+0
BLB UV lamp
I I
350 400 700 1100
Wavelength range of a typical camera CCD/CMOS sensor
Figure 2-9. Schematic representation of the spectral output disctribution (SPD) of a BLB ultraviolet
light compared to the wavelength range of a CCD/CMOS sensor. Excitation: the same lamps and
filters as for UVR can be used. Emission: a filter is required which will allow only light in the visible
region (400-700 nm) through and block any UV or IR radiation. Shading shows wavelengths to be
excluded (filtered) from the camera.
0.99 y
0.98
0.97
0.95
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.05
0.01
195 hi
nm)
600
Figure 2-10. Transmittance curve of a UV-blocking filter (e.g. Schott KV418, which cuts-on at 418
nm).
Version No. 1.0 51 Date : 14/10/2013