Hello everyone. I have a question about Optics and I place here because I don't know if there are a specific thread. I am using a laser beam to calibrate position of several cameras. But instead of to have one spot in the image I have two spot. One of them is smaller of the other. I presume that the smaller one is some kind of reflection, maybe in the material, maybe in the optics of camera. The focal lenght of camera optics is 9mmm and resolution is 1600 pixels. Have someone any idea of the cause of this reflection? Have someone eperienced something similar? Thanks a lot in advance!