Controlling image capture
STINGRAY Technical Manual
V4.4.2
199
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
on page 307). 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 66: 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 67: Camera-specific minimum exposure time