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plano-convex lens
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Diagram showing cross-sections of common lenses on the left, with three converging lenses above and three diverging lenses below. On the right, light rays are shown passing through a converging lens, focusing at point F on the principal axis, and through a diverging lens, spreading outward as if originating from focal point F. Labels indicate axis, focal point, focal length, and focal plane.
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plano-convex lens

optics
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Diagram showing cross-sections of common lenses on the left, with three converging lenses above and three diverging lenses below. On the right, light rays are shown passing through a converging lens, focusing at point F on the principal axis, and through a diverging lens, spreading outward as if originating from focal point F. Labels indicate axis, focal point, focal length, and focal plane.
common lenses (Left) Cross sections of standard forms of common lenses. (Right) Refraction of light by converging and diverging lenses, showing the principal axis, the principal focus (or focal point) F, the focal length f, and the focal plane.

A plano-convex lens is a type of lens in optics that has one flat surface and one curved, bulging (convex) surface. This design causes parallel rays of light to converge, or come to a focus, at a specific point. This makes it a converging lens. Lenses work by refracting, or bending, light as it passes through them. The curvature of the lens surfaces determines how light rays are bent, allowing the lens to form images. Plano-convex lenses are fundamental components in various optical instruments.

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