Specifications
155Alvium G1 User Guide V1.7.0
IR cut filter
The following table shows which Alvium G1 models are equipped with an IR cut
filter. The filter is permanently installed and cannot be removed.
Cameras without IR cut filter have a higher sensitivity for low-light imaging.
Moreover, spectral sensitivity is increased.
Cameras with IR cut filter are more accurate in reproduction of color, contrast, and
sharpness, as the filter absorbs near-IR wavelengths. See Figure 48 for filter
transmission.
Color or monochrome
model
C-Mount
CS-Mount
S-Mount
Color Type Hoya C5000 IR cut filter No filter
Monochrome No filter
Table 71: Optical filters availability
Spectral transmission values
The following curve shows typical transmission for type Hoya C5000 IR cut filter.
Values may vary slightly by filter lot.
Figure 48: Spectral transmission for type Hoya C5000 IR cut filter (exemplary curve)
S-Mount lenses with IR cut design
For improved image quality, we recommend using S-Mount lenses that are
IR- optimized or that have IR cut coating. See the S-Mount Lenses User Guide at
www.alliedvision.com/fileadmin/content/documents/products/accessories/lenses
/Allied_Vision/User_Guide/S-Mount-Lenses_User-Guide.pdf.
0
10
20
30
40
50
60
70
80
90
100
300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000 1050 1100 1150 1200
Transmission [%]
Wavelength [nm]
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