Camera Cycles
Basler Sprint Camera Cycle
A single camera cycle of a Basler Sprint CMOS bilinear line-scan camera operating in the "Exsync controlled operation – Level controlled Mode – Raw Line A" requires two consecutive Exsync pulses to be completed:
The leading (=falling) edge of the first Exsync pulse initiates a new exposure.
The trailing (=rising) edge of the first Exsync terminates the exposure and initiates the readout of the first line (line A) of the sensor.
The leading (=falling) edge of the second Exsync pulse has no function.
The trailing (=rising) edge of the second Exsync pulse initiates the readout of the second line (line B) of the sensor.
The sensor integrates light for all pixels simultaneously during the time interval between the leading and the trailing edge of the first Exsync pulse. The strobe light must be fired during that time interval.
The sensor doesn't integrate light during the low period of the second Exsync pulse. Firing the strobe during that interval has no effect on the acquired data.
The camera qualifies each line of image data by the LVAL signal.
The camera delivers also an FVAL pulse surrounding the two LVAL pulses belonging to the same camera cycle. This allows the frame grabber to unambiguously identify the "line parity"(A or B).
Phase-shifted Camera Cycles
The drawing shows the camera cycles of two Basler Sprint cameras where the Exsync periods are synchronized with a phase shift of one period of the Exsync signal.
- The 2 cameras are never exposing simultaneously!
- Firing the illumination during the exposure time interval of a camera will not affect the other camera.