164Alvium USB Cameras User Guide V3.6.4
Specifications
IR cut filter
Table 71 shows which Alvium 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 59 for filter
transmission.
Color or monochrome model Bare board S-Mount CS-Mount C-Mount
Color No filter Type Hoya C-5000 IR cut filter
Monochrome No filter
Table 71: Optical filter availability
Spectral transmission values
The following curve shows typical transmission for type Hoya C-5000 IR cut filter.
Values may vary slightly by filter lot.
Figure 59: Type Hoya C-5000 IR cut filter spectral transmission
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.
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Transmission [%]
Wavelength [nm]
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