Lens Forms

LENS FORMS

Lens Forms

Lens form refers to the specific curvature of a lens's front and back surfaces, which, along with its material, dictates its optical power and how it bends light..

with common forms including

• Convex (curves out),
• Concave (curves in),
• Plano (flat), and

Meniscus (mixed curves)

Convex (Converging): Both surfaces curve outwards, causing light rays to converge (come together).

Concave (Diverging): Both surfaces curve inwards, causing light rays to spread out (diverge).

Plano: One surface is flat (plano), and the other is curved (e.g., plano-convex).

Meniscus: Both surfaces are curved, but one is more curved than the other, creating a lens that can converge or diverge light.

Types of Lens Forms (Examples)

• Biconvex/Equiconvex: Both surfaces are convex (outward).
• Biconcave/Equiconcave: Both surfaces are concave (inward).
• Plano-convex: One flat, one outward-curving.

Plano-concave: One flat, one inward-curving