Instruction manual

Prosilica GS Technical Manual V2.1.0
26
Mechanical drawings
Image to infinity
Use a C-Mount compatible lens that allows an infinity focus. Set the lens to
infinity and image a distant object—10 to 15 m should suffice. Make sure the
lens is firmly threaded onto the C-Mount ring. Rotate the lens and C-Mount ring
until the image is focused. Carefully tighten the locking ring and recheck focus.
Lens protrusion for C-Mount cameras
Lens protrusion is the distance from outer edge of C-Mount ring to contact point
of first surface internal to C-Mount ring. For color cameras this surface is the IR-
filter holder, and for mono cameras this surface is the internal camera front
plate (see figure 13). Table 9 presents lens protrusion values for Prosilica GS
cameras with C-Mount.
Figure 13: Cross section of typical Prosilica GS assembly with C-Mount
Camera Sensor
orientation
Lens protrusion
[mm]
Camera Sensor
orientation
Lens protrusion
[mm]
GS650 Portrait 13.64
GS1380 Landscape 13.64
GS650 Landscape 13.64
GS1380 Portrait 13.64
GS650C Landscape 8.95
GS1380C Landscape 9.00
GS650C Portrait 9.27
GS1380C Portrait 9.32
GS660 Landscape 13.64
GS2450 Landscape 13.64
GS660C Landscape 8.41
GS2450C Landscape 8.29
Table 9: Lens protrusion for Prosilica GS cameras with C-Mount
Lens protrusion
Section A-A for C-Mount
monochrome cameras
Front Plate
IR cut lter
holder
Lens protrusion
Section A
-A for C-Mount
color cameras
A
A