User Manual

Controlling image capture
PIKE Technical Manual V5.1.2
215
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 157: Time base ID on page 335). 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 72: 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 73: Camera-specific minimum exposure time