help for laser ray circuit using photographic film

[yashartur]

Hi. I am Yashar from Baku. I would like to construct laser ray circuit using photographic film. The idea is that the laser ray which is fixed in a nonmovable rod, is directed to another rod which is movable in a distance. A photographic film is put in a movable rod, the second one . I want to investigate changing the laser ray position on photographic film (or any film) in dependence of time. Could you advice to me how to design the circuit, please? Thank you for help.