A flat convex lens is a type of lens that is convex on one side and flat on the other. Its materials include K9 glass, fused silica, zinc selenide, zinc sulfide, germanium, silicon, lithium fluoride, magnesium fluoride, calcium fluoride and barium fluoride. So, which side is used for focusing a flat convex lens?
When focusing a flat convex lens, a convex surface is used as the focusing surface. When light vertically enters a flat convex lens, the effect of one side of the plane is similar to that of a glass window, and the light passing through does not change its original direction, while the convex side will cause the light to deflect, thus achieving the effect of focusing. In specific situations such as handling ultraviolet and infrared rays, due to the possibility of phase reversal of these rays, it may be necessary to choose a convex surface as the focusing surface to solve the problem of the optical system.
The above is an answer to which side of the flat convex lens is used for focusing. We hope it is helpful to you. If you have any questions, please feel free to consult online or leave a message.
