Double convex lens also known as bi convex lens is the most typical positive lens in an optical system. both sides are convex, with the middle part being thick and edges being thin, have positive focal length, two convex surfaces with equal radius of curve, commonly used in camera,microscopes and telescopes, also focusing or alignment on laser processing and fiber coupling.
Difference between plano convex lens and double convex lens
Dimension
Double convex lens
plano convex lens( flat convex)
Structure
bi convex symmetry
one flat and one convex( asymmetric)
Aberration
when the object image is conjugate, the spherical aberration is the smallest
when the convex surface faces the parallel light, the spherical aberation is the smallest
Application
general imaging,symmetry system
alignment, focusing, asymmetric optical path
Bi convex lens and Bi concave lens are two fundamentally different types of basic spherical lens in optics, with completely opposite functions, the for…