Can a Laser pointer control a ptz camera?

Answer 1

There are systems available that use lasers to guide cameras to certain positions. They are used in military applications as well as industrial automation systems. The laser is normally just one small part of a large control system so the laser does not control a camera directly.

As for a laser pointer controlling a camera in the same way as an infra-red hand control, there is nothing commercially available at the time of writing. Although the idea of using a laser as a remote control over a long distance is interesting, manufacturers have not introduced such devices. Theoretically, it is quite possible to do it. Whether there is a commercial reason to do it is a more difficult question to answer.