Allied Guppy, Техническое руководство, Страница: 130 / 238

Controlling image capture
GUPPY Technical Manual V4.0.1
130
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 ti offset
The register value is the value set in the corresponding IIDC 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 97: Time base ID on page 193). The default value here is set to 20 µs.
Exposure time of CMOS sensor (GUPPY F-036)
The CMOS sensor of GUPPY F-036 enables shutter times in integer multiples
of the row time (29.89 µs).
Example GUPPY F-036
Set Shutter register: 100
100 x 20 µs = 2000 µs
2000 µs/29.89 µs = 66.91
Effective shutter:
66 x 29.89 µs = 1972.74 µs (without offset)
Camera offsets
A camera-specific offset is also added to this value. It is different for the
camera models:
Note Although you can enter shutter register values as usual, the
camera will round down to integer multiples of the row time.
Camera model Offset
GUPPY F-025 tbd µs
GUPPY F-029 tbd µs
GUPPY F-033 24.28 µs
GUPPY F-036 20.30 µs
GUPPY F-046 23.90 µs
GUPPY F-080 35.64 µs
Table 55: Camera-specific offset