Double Convex Lens

Double Convex Lens

The Double Convex Lenses present an identical convex surface on both sides of the lens. They have a positive focal length and are useful for 1:1 imaging and in multielement systems.

The lens can be made by BK7 Fused Silica CaF₂ Sapphire Ge Silicon ZnSe etc.When light passes through a convex lens, it focuses, or focuses, on the central axis of the lens. The degree of focusing depends on the radius of curvature of the lens surface and the refractive index of the lens material. They  are widely used in optical systems such as camera lenses, microscopes, and telescopes. Convex lenses can also be used in combination with other lenses, such as plano-convex lenses, to create a lens system with specific properties, such as a telescope objective or a microscope eyepiece.

How to Calculate Focal length of Double Convex Lens?

f= (R1xR2)/((n-1)x(R2-R1)

F is the focal length of the lens

n is the refractive index of the lens

R is the curvature radius of the lens 

The Common glass Refractive index

Parameter of Bi Convex Lens

Material:BK7 Fused Silica CaF₂ MgF₂ Sapphire Germanium Silicon ZnSe ZnS.

Diameter:0.5-600mm

Dia Tolerance:+/-0.02mm

Thickness Tolerance:+/-0.01mm

Centeration<30 arcmin

Flatness<1/20 lambda

Surface Quality:10-5

Coating: AR BBAR HR.