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PVCAM
3.9.x
Programmable Virtual Camera Access Method library
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Within an exposure loop, the interaction of the Exposure, Clear, and Shutter Open modes determines how the camera behaves during a sequence. On this page, the sample command sequences show how each exposure mode acts in combination with each Clear and Shutter open mode. Not all supported cameras have programmable shutter control, remember to check for availability of a particular mode.
Key | Description |
---|---|
ClearN | Clear sensor N times as specified in clear_cycles |
OS | Open shutter and perform PARAM_SHTR_OPEN_DELAY |
CS | Close shutter and perform PARAM_SHTR_CLOSE_DELAY |
EXP | Expose sensor for exposure_time |
I->S | Transfer image array to storage array (frame transfer) |
Readout | Readout sensor (readout storage array for frame transfer) |
WaitT | Wait until trigger |
EXP until notT | Expose sensor until trigger end (BULB_MODE) |
Items in ITALICS repeat M times for a sequence of M exposures.
Items in BOLD are outside of the sequence loop.
TIMED_MODE command sequences:
Clear Mode | Shutter Mode | Command Sequence |
---|---|---|
CLEAR_PRE_EXPOSURE | OPEN_PRE_EXPOSURE | ClearN, OS, EXP, CS, I->S, Readout |
OPEN_PRE_SEQUENCE | OS, ClearN, EXP, I->S, Readout, CS | |
OPEN_PRE_TRIGGER | ClearN, OS, EXP, CS, I->S, Readout | |
OPEN_NO_CHANGE | ClearN, EXP, I->S, Readout | |
OPEN_NEVER | CS, ClearN, EXP, I->S, Readout | |
CLEAR_PRE_SEQUENCE | OPEN_PRE_EXPOSURE | ClearN, OS, EXP, CS, I->S, Readout |
OPEN_PRE_SEQUENCE | OS, ClearN, EXP, I->S, Readout, CS | |
OPEN_PRE_TRIGGER | ClearN, OS, EXP, CS, I->S, Readout | |
OPEN_NO_CHANGE | ClearN, EXP, I->S, Readout | |
OPEN_NEVER | CS, ClearN, EXP, I->S, Readout | |
CLEAR_NEVER | OPEN_PRE_EXPOSURE | OS, EXP, CS, I->S, Readout |
OPEN_PRE_SEQUENCE | OS, EXP, I->S, Readout, CS | |
OPEN_PRE_TRIGGER | OS, EXP, CS, I->S, Readout | |
OPEN_NO_CHANGE | EXP, I->S, Readout | |
OPEN_NEVER | CS, EXP, I->S, Readout |
TRIGGER_FIRST_MODE command sequences:
Clear Mode | Shutter Mode | Command Sequence |
---|---|---|
CLEAR_PRE_EXPOSURE | OPEN_PRE_EXPOSURE | EXP+WaitT, ClearN, OS, EXP, CS, I->S, Readout |
OPEN_PRE_SEQUENCE | OS, EXP+WaitT, ClearN, EXP, I->S, Readout, CS | |
OPEN_PRE_TRIGGER | EXP+WaitT, OS, ClearN, EXP, CS, I->S, Readout | |
OPEN_NO_CHANGE | EXP+WaitT, ClearN, EXP, I->S, Readout | |
OPEN_NEVER | CS, EXP+WaitT, ClearN, EXP, I->S, Readout | |
CLEAR_PRE_SEQUENCE | OPEN_PRE_EXPOSURE | Clear+WaitT, ClearN, OS, EXP, CS, I->S, Readout |
OPEN_PRE_SEQUENCE | OS, Clear+WaitT, EXP, I->S, Readout, CS | |
OPEN_PRE_TRIGGER | Clear+WaitT, OS, EXP, CS, I->S, Readout | |
OPEN_NO_CHANGE | Clear+WaitT, EXP, I->S, Readout | |
OPEN_NEVER | CS, Clear+WaitT, EXP, I->S, Readout | |
CLEAR_NEVER | OPEN_PRE_EXPOSURE | EXP+WaitT, ClearN, OS, EXP, CS, I->S, Readout |
OPEN_PRE_SEQUENCE | OS, EXP+WaitT, EXP, I->S, Readout, CS | |
OPEN_PRE_TRIGGER | EXP+WaitT, OS, EXP, CS, I->S, Readout | |
OPEN_NO_CHANGE | EXP+WaitT, EXP, I->S, Readout | |
OPEN_NEVER | CS, EXP+WaitT, EXP, I->S, Readout |
STROBED_MODE command sequences:
Clear Mode | Shutter Mode | Command Sequence |
---|---|---|
CLEAR_PRE_EXPOSURE | OPEN_PRE_EXPOSURE | Clear+WaitT, OS, EXP, CS, I->S, Readout |
OPEN_PRE_SEQUENCE | OS,Clear+WaitT, EXP, I->S, Readout, CS | |
OPEN_PRE_TRIGGER | OS, Clear+WaitT, EXP, CS, I->S, Readout | |
OPEN_NO_CHANGE | Clear+WaitT, EXP, I->S, Readout | |
OPEN_NEVER | CS, Clear+WaitT, EXP, I->S, Readout | |
CLEAR_PRE_SEQUENCE | OPEN_PRE_EXPOSURE | ClearN,EXP+WaitT, OS, EXP, CS, I->S, Readout |
OPEN_PRE_SEQUENCE | OS, ClearN, EXP+WaitT, EXP, I->S, Readout,CS | |
OPEN_PRE_TRIGGER | ClearN, OS, EXP+WaitT, EXP, CS, I->S, Readout | |
OPEN_NO_CHANGE | ClearN, EXP+WaitT, EXP, I->S, Readout | |
OPEN_NEVER | CS, ClearN, EXP+WaitT, EXP, I->S, Readout | |
CLEAR_NEVER | OPEN_PRE_EXPOSURE | EXP+WaitT, OS, EXP, CS, I->S, Readout |
OPEN_PRE_SEQUENCE | OS, EXP+WaitT, EXP, I->S, Readout, CS | |
OPEN_PRE_TRIGGER | OS, EXP+WaitT, EXP, CS, I->S, Readout | |
OPEN_NO_CHANGE | EXP+WaitT, EXP, I->S, Readout | |
OPEN_NEVER | CS, EXP+WaitT, EXP, I->S, Readout |
BULB_MODE command sequences:
Clear Mode | Shutter Mode | Command Sequence |
---|---|---|
CLEAR_PRE_EXPOSURE | OPEN_PRE_EXPOSURE | Clear+WaitT, OS, EXP Until notT, CS, I->S, Readout |
OPEN_PRE_SEQUENCE | OS, Clear+WaitT, EXP Until notT, I->S, Readout, CS | |
OPEN_PRE_TRIGGER | OS, Clear+WaitT, EXP Until notT, CS, I->S, Readout | |
OPEN_NO_CHANGE | Clear+WaitT, EXP Until notT, I->S, Readout | |
OPEN_NEVER | CS, Clear+WaitT, EXP Until notT, I->S, Readout | |
CLEAR_PRE_SEQUENCE | OPEN_PRE_EXPOSURE | ClearN, EXP+WaitT, OS, EXP Until notT, CS, I->S, Readout |
OPEN_PRE_SEQUENCE | OS, ClearN, EXP+WaitT, EXP Until notT, I->S, Readout, CS | |
OPEN_PRE_TRIGGER | ClearN, OS, EXP+WaitT, EXP Until notT, CS, I->S, Readout | |
OPEN_NO_CHANGE | ClearN, EXP+WaitT, EXP Until notT, I->S, Readout | |
OPEN_NEVER | CS, ClearN, EXP+WaitT, EXP Until notT, I->S, Readout | |
CLEAR_NEVER | OPEN_PRE_EXPOSURE | EXP+WaitT, OS, EXP Until notT, CS, I->S, Readout |
OPEN_PRE_SEQUENCE | OS, EXP+WaitT, EXP Until notT, I->S, Readout, CS | |
OPEN_PRE_TRIGGER | OS, EXP+WaitT, EXP Until notT, CS, I->S, Readout | |
OPEN_NO_CHANGE | EXP+WaitT, EXP Until notT, I->S, Readout | |
OPEN_NEVER | CS, EXP+WaitT, EXP Until notT, I->S, Readout |