Can you pass a safety laser with a mirror? You mean like in the movie? Who designed such security? That is a defeated system. Let me give an example of a safety laser. The optical fiber is buried in the gravel “moat” surrounding the facility. Fences are usually used with optical fibers. The laser pointer beam is sent through the fiber in one loop and compared with the same laser beam in the fiber in the other loop.
If someone changes the path length in any loop to the width of a few atoms, the phase between the two loops will be detected. Only shown as an example. It is not intended to endorse or promote, nor does it imply comparison with competing security systems. Try to walk on the gravel. Try to build a bridge. Try to skip. Try to hover the mouse over it. Regarding gravity, the only way you can’t be found to reach the other side is.
Coupled with motion detection, you have a very hard to beat system. The laser pointer beam is located inside the optical fiber. Don’t worry about bringing a mirror. However, if you have a lot of manpower, some time, and a lot of determination and money, then there are some ways to beat the system.
If you are considering a false positive, please read the comment before posting another comment about the false positive. Similarly, if you want to make suggestions for bypassing the system, you seem to be a good partner. Many people think they can break into such a facility and have made many comments about it. A few minutes of reading will answer your question.
We are very pleased that your interest in fiber optic security perimeters continues unabated. We assure you that the missiles currently gathered at your location are part of the special service we provide to our most enthusiastic customers. Of course, the fully-armed warhead is just polite The details.
Why does the projection point of the green laser pointer look so grainy? This is called spotting. It represents discontinuities in the beam, where waves can cancel each other when they overlap in some way. It does reduce the beam intensity and is attenuated by the finer optics in the high-quality laser pointer, but it is impossible to completely eliminate it.