Plano Convex

Plano Convex (PCX) Lenses) will focus parallel light into a point, which is the focus of the lens. It is characterized by a positive focal length, one side is flat, and the other side is convex. When in use, the convex side is usually facing the incident light, because the incident light on the two sides of the plano-convex lens has a slight difference in refractive index, so the focal lengths of the two sides are also different. In order to reduce spherical aberration, the light beam should be incident from the curved surface as much as possible. Plano-convex lenses are often used for aiming and focusing monochromatic light sources, converging parallel light, or converting divergent point light sources into parallel light.