Controlling image capture
PIKE Technical Manual
V5.0.0
197
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 317). 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
Pike F-032
17 µs
Pike F-100
42 µs
Pike F-145
38 µs
Pike F-145-15fps
70 µs
Pike F-210
42 µs
Pike F-421
69 µs
Pike F-505
26 µs
Pike F-1100
128 µs
Pike F-1600
635 µs
Table 64: Camera-specific exposure time offset
Camera model
Minimum exposure time
Effective min. exp. time
= Min. exp. time + offset
Pike F-032
1 µs
1 µs + 17 µs =
18
µs
Pike F-100
1 µs
1 µs + 42 µs =
43
µs
Pike F-145
1 µs
1 µs + 38 µs =
39
µs
Pike F-145-15fps
1 µs
1 µs + 70 µs =
71
µs
Pike F-210
1 µs
1 µs + 42 µs =
43
µs
Pike F-421
1 µs
1 µs + 69 µs =
70
µs
Table 65: Camera-specific minimum exposure time
