© 2009 IDS Imaging Development Systems GmbH
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User Manual uEye Cameras V3.32
9.2.7
Filter Glasses
Filter Types
Every
uEye
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
uEye model name.
The following table shows an overview of the different optical filters used in the
uEye
cameras:
Filter type
Name
Refractive index
(n
Filter
)
Glass
type
Thicknes
s (f)
Cut-off frequency Non-reflective
IR cut
filter (old)
BG
1,53
BG40
1 mm
650 nm
-
IRcut filter
(new)
HQ
1,53
D263
1 mm
650 nm
On one side
Daylight
cut filter
DL
1,53
RG665
1 mm
665 nm
-
Glass
GL
1,53
D263
1 mm
380 nm
On both sides
You can tell the filter type from the outside by its coloration:
·
Reddish glass: HQ filter
·
Bluish glass: BG filter
·
Opaque glass: DL filter
·
Plain glass: GL filter
New
uEye
color cameras use an IR cut filter of the type
HQ
by default. This filter offers an
improved accuracy of the infrared content.
HQ
filters achieve a higher image brightness
and better color rendering.
uEye drivers of version V3.24 and higher determine automatically which the IR filter is used
in a camera. The corresponding color correction is selected automatically.
