January 2020
20
Technical Manual: GigE uEye CP Rev. 2
10 Filter glasses
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10.1 Filter types
Every camera has a filter glass in the front flange to prevent the entry of dust particles. Color cameras by
default use an IR cut filter, which is required to ensure correct color rendering. The default filter glass in
monochrome cameras has no filter effect. Every camera model is available with different filter variants such as
daylight cut filters (type DL). The filter type is given at the end of the model name.
The following table shows an overview of the different optical filters used in IDS cameras:
Filter type
Name
Refractive
index
(n
Filter
)
Glass type
Thickness
(f)
Cut-on
wavelength
Cut-off
wavelength
Non-
reflective
IR cut filter
HQ
1.53
D263
1 mm
-
650 ±10 nm On one side
Glass
GL
1.53
D263T
1 mm
330 nm
-
On both
sides
Daylight cut
filter
DL
1.53
RG695
1 mm
695 nm
-
-
You can tell the filter type from the outside by its coloration:
·
Reddish glass: HQ filter
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Plain glass: GL filter
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Opaque glass: DL filter
All sensors have a D263 type cover glass. This glass is opaque to wavelengths below 330 nm.
Infrared cut filter (type HQ)
Fig. 14: HQ filter
