Point Grey Grasshopper - Infrared Cut-Off Filters

Point Grey Research Grasshopper Technical Reference
Camera Physical Properties
Revised 26-Nov-10
Copyright (c) 2010 Point Grey Research Inc.
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2.6. Infrared Cut-Off Filters
Point Grey Research color camera models are equipped with an additional infrared (IR) cut-off
filter. This filter can reduce sensitivity in the visible spectrum. The properties of this filter are
illustrated in the results below, which were obtained by Point Grey Research independent of
camera model.
In monochrome models, the IR filter is replaced with a transparent piece of glass.
The following are the properties of the IR filter/protective glass
1
:
Type
Reflective
Material
Schott D 263 T or BK7 equivalent for coating filters
Physical Filter Size
14 mm x 14 mm
Glass Thickness
1.0 mm
Dimensional Tolerance
+/-0.1 mm`
Coating Filters
Scott D 263 T
1
These properties apply to all imaging cameras except GRAS 14S5.
Related Knowledge Base Articles
ID Title URL
98 Understanding flange back
distance on C-mount and CS-
mount cameras
www.ptgrey.com/support/kb/index.asp?a=4&q=98