User guide

Controlling image capture
STINGRAY Technical Manual V4.4.4
194
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 134: Time base ID on page 302). The default value here is set to 20 µs.
A camera-specific offset is also added to this value. It is different for the
camera models:
Exposure time offset
Minimum exposure time
Camera model Exposure time offset
Stingray F-033 27 µs
Stingray F-046 27 µs
Stingray F-080 45 µs
Stingray F-125 21 µs
Stingray F-145 70 µs
Stingray F-146 35 µs
Stingray F-201 44 µs
Stingray F-504 38 µs
Table 65: Camera-specific exposure time offset
Camera model Minimum exposure time Effective min. exp. time
= Min. exp. time + offset
Stingray F-033 4 µs 4 µs + 27 µs = 31 µs
Stingray F-046 4 µs 4 µs + 27 µs = 31 µs
Stingray F-080 4 µs 4 µs + 45 µs = 49 µs
Stingray F-125 4 µs 4 µs + 21 µs = 25 µs
Stingray F-145 4 µs 4 µs + 70 µs = 74 µs
Stingray F-146 4 µs 4 µs + 35 µs = 39 µs
Table 66: Camera-specific minimum exposure time