Instruction manual

Controlling image capture
Guppy PRO Technical Manual V2.0.3
141
Exposure time (shutter) and offset
The exposure (shutter) time for continuous mode and Trigger_Mode_0 is
based on the following formula:
Shutter register value x time base + offset
The register value is the value set in the corresponding IIDC 1.31 register
(SHUTTER [81Ch]). This number is in the range between 1 and 4095.
The shutter register value is multiplied by the time base register value (see
Table 116: Time base ID on page 224). The default value here is set to 20 µs.
Exposure time of Guppy PRO F-503 (CMOS)
The exposure time of Guppy PRO F-503 can be set in row time increments.
The formula for the row time is:
The minimum row time and the row time by maximum resolution are:
The shutter time of Guppy PRO F-503 can be extended via the advanced reg-
ister: EXTENDED_SHUTTER
For more information see Chapter Extended shutter on page 225 and Table
117: Advanced register: Extended shutter on page 225.
Exposure time offset
A camera-specific offset is also added to this value. It is different for the
camera models:
Formula 7: Row time for Guppy PRO F-503 (CMOS)
Formula 8: Min. row time and row time at max. resolution for Guppy PRO F-503 (CMOS)
Camera model Exposure time offset
Guppy PRO F-031 67 µs
Guppy PRO F-032 23 µs
Guppy PRO F-125 31 µs
Guppy PRO F-146 27 µs
Table 58: Camera-specific exposure time offset
t
row
10.42 ns width + 9.375 µs=
t
row min
10.042 µs=
t
row max res
36.375 µs=