Synchronization of Optical Chopper

[Ch91]

Hello,

I work on the synchronization of an optical chopper with acquisition of images by visible camera (38 fps). I want to detect Edge in the signal provided by the chopper and just after I want to start acquisition of the images.
I use the NI USB 6008 card to retrieve the Chopper signal (Square signal f = 20Hz). I started doing a program using the DAQmx and I did not get to sync chopper with camera, still have a gap between them.
Can you offer me some solutions that can help me solve this problem?

[caillotantoine]

Hello Ch91, 

Can you tell us more about the synchronization you want between your optical chopper end your camera? 

Regards, 

Caillot Antoine

[Ch91]

Thank you for your reply,

indeed I want to use the chopper to turn ON and OFF a laser beam that will illuminate my scene, it means that instead of turning ON and OFF my laser every time, I will use the chopper to do this role (Picture of my chopper attached )
So, the acquisition of the images of my scene which will be taken by my camera must be synchronous with the rotation of the chopper.

Thank you in advance.