Introduction To The Working Principle Of Binoculars

Among all optical instruments, apart from cameras, the most popular ones are binoculars. It allows people to watch sports events and concerts more carefully, adding a lot of fun. In addition, binoculars provide a depth sensation that is unmatched by monoculars. The most popular binoculars use convex lenses. Since a convex lens inverts the image up and down and left and right, a set of prisms is needed to correct the inverted image. Light passes through these prisms from the objective lens to the eyepiece, where it undergoes four reflections. In this way, light travels a long way in a short distance, so the barrel of a binocular can be much shorter than that of a monocular.